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Installation and Veri cation Manual
HP 70310A
Precision Frequency Reference
ABCDE
HP Part No. 70310-90059
Printed in USA July 1994
Notice
The information contained in this document is subject to change without notice.
Hewlett-Packard makes no warranty of any kind with regard to this material, including,
but not limited to, the implied warranties of merchantability and tness for a particular
purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishing, performance, or use of this material.
Restricted Rights Legend.
Use, duplication, or disclosure by the U.S. Government is subject to restrictions as set forth
in subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at
DFARS 252.227-7013 for DOD agencies, and subparagraphs (c) (1) and (c) (2) of the Commercial
Computer Software Restricted Rights clause at FAR 52.227-19 for other agencies.
Copyright Hewlett-Packard Company 1994
c
All Rights Reserved. Reproduction, adaptation, or translation without prior written permission
is prohibited, except as allowed under the copyright laws.
1400 Fountaingrove Parkway, Santa Rosa, CA 95403-1799, USA
Certi cation
Hewlett-Packard Company certi es that this product met its published speci cations at the
time of shipment from the factory. Hewlett-Packard further certi es that its calibration
measurements are traceable to the United States National Institute of Standards and
Technology, to the extent allowed by the Institute's calibration facility, and to the calibration
facilities of other International Standards Organization members.
Warranty
This Hewlett-Packard instrument product is warranted against defects in material and
workmanship for a period of one year from date of shipment. During the warranty period,
Hewlett-Packard Company will, at its option, either repair or replace products which prove to
be defective.
For warranty service or repair, this product must be returned to a service facility designated by
Hewlett-Packard. Buyer shall prepay shipping charges to Hewlett-Packard and Hewlett-Packard
shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all
shipping charges, duties, and taxes for products returned to Hewlett-Packard from another
country.
Hewlett-Packard warrants that its software and rmware designated by Hewlett-Packard for
use with an instrument will execute its programming instructions when properly installed on
that instrument. Hewlett-Packard does not warrant that the operation of the instrument, or
software, or rmware will be uninterrupted or error-free.
Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from improper or inadequate
maintenance by Buyer, Buyer-supplied software or interfacing, unauthorized modi cation or
misuse, operation outside of the environmental speci cations for the product, or improper
site preparation or maintenance.
NO OTHER WARRANTY IS EXPRESSED OR IMPLIED. HEWLETT-PACKARD SPECIFICALLY
DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE.
Exclusive Remedies
THE REMEDIES PROVIDED HEREIN ARE BUYER'S SOLE AND EXCLUSIVE REMEDIES.
HEWLETT-PACKARD SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT,
OR ANY OTHER LEGAL THEORY.
Assistance
Product maintenance agreements and other customer assistance agreements are available for
Hewlett-Packard products.
For any assistance, contact your nearest Hewlett-Packard Sales and Service Oce.
iii
Safety Symbols
The following safety symbols are used throughout this manual. Familiarize yourself with each
of the symbols and its meaning before operating this instrument.
CAUTION The CAUTION sign denotes a hazard. It calls attention to a procedure which, if
not correctly performed or adhered to, could result in damage to or destruction
of the product or the user's work. Do not proceed beyond a CAUTION sign
until the indicated conditions are fully understood and met.
WARNING The WARNING sign denotes a hazard. It calls attention to a procedure
which, if not correctly performed or adhered to, could result in injury
to the user. Do not proceed beyond a WARNING sign until the indicated
conditions are fully understood and met.
DANGER The DANGER sign denotes an imminent hazard to people. It warns the
reader of a procedure which, if not correctly performed or adhered to,
could result in injury or loss of life. Do not proceed beyond a DANGER
sign until the indicated conditions are fully understood and met.
iv
General Safety Considerations
WARNING The instructions in this document are for use by quali ed personnel
only. To avoid electrical shock, do not perform any servicing unless you
are quali ed to do so.
The opening of covers or removal of parts is likely to expose dangerous
voltages. Disconnect the instrument from all voltage sources while it is
being opened.
The power cord is connected to internal capacitors that may remain live
for ve seconds after disconnecting the plug from its power supply.
This is a Safety Class 1 Product (provided with a protective earthing
ground incorporated in the power cord). The mains plug shall only be
inserted in a socket outlet provided with a protective earth contact.
Any interruption of the protective conductor inside or outside of the
instrument is likely to make the instrument dangerous. Intentional
interruption is prohibited.
For continued protection against re hazard, replace fuse only with
same type and ratings, (type nA/nV). The use of other fuses or materials
is prohibited.
WARNING Before this instrument is switched on, make sure it has been properly
grounded through the protective conductor of the ac power cable to a
socket outlet provided with protective earth contact.
Any interruption of the protective (grounding) conductor, inside
or outside the instrument, or disconnection of the protective earth
terminal can result in personal injury.
Before this instrument is switched on, make sure its primary power
circuitry has been adapted to the voltage of the ac power source.
Failure to set the ac power input to the correct voltage could cause
damage to the instrument when the ac power cable is plugged in.
v
Contents
1. General Information
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Manual Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Module Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Module Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Safety Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Modules Covered by Manual . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Serial Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Manual Updating Supplement . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Front and Rear-Panel Features . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Front-Panel Status and Error LEDs . . . . . . . . . . . . . . . . . . . . . 1-5
ACT (Active) LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
ERR (Error) LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
OVEN COLD LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
EXTERNAL REF (Reference) LED . . . . . . . . . . . . . . . . . . . . 1-5
PLL ERROR (Phase-Lock-Loop Error) LED . . . . . . . . . . . . . . . . . 1-5
Oscillator Adjustment Door . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Module Latch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Rear-Panel Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . 1-6
A 1 OUT, A 2 OUT, and A 3 OUT . . . . . . . . . . . . . . . . . . . . . 1-6
B 1 OUT, B 2 OUT, and B 3 OUT . . . . . . . . . . . . . . . . . . . . . 1-6
A IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
B IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
100 MHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
EXT PWR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
10 MHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
EXT REF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Mainframe/Module Interconnect . . . . . . . . . . . . . . . . . . . . . 1-7
Electrostatic Discharge Information . . . . . . . . . . . . . . . . . . . . . . 1-8
Reducing ESD Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
PC Board Assemblies and Electronic Components . . . . . . . . . . . . . 1-8
Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Static-Safe Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Sales and Service Oces . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Returning Instruments for Service . . . . . . . . . . . . . . . . . . . . . . 1-13
Contents-1
2. Installation
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Addressing the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Determining the HP-MSIB Address . . . . . . . . . . . . . . . . . . . . . 2-2
Setting the HP-MSIB Address Switches . . . . . . . . . . . . . . . . . . . 2-3
Installing the External Power Pack . . . . . . . . . . . . . . . . . . . . . . 2-5
Line Voltage Selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
AC Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Installing the Module in the Mainframe . . . . . . . . . . . . . . . . . . . . 2-7
Connecting the Rear-Panel Cables . . . . . . . . . . . . . . . . . . . . . . . 2-8
HP 70310A Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
HP 71210A System Connections . . . . . . . . . . . . . . . . . . . . . 2-8
Other Con gurations . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
HP 70310A Option 001 . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
HP 71210A System Connections . . . . . . . . . . . . . . . . . . . . . 2-9
Other Con gurations . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
HP 70310A Option 002 . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
HP 71210A System Connections . . . . . . . . . . . . . . . . . . . . . 2-10
Other Con gurations . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Checking Module Operation . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
HP 70310A as a Separate Frequency Reference . . . . . . . . . . . . . . . 2-11
Front-Panel LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Checking for Error Messages . . . . . . . . . . . . . . . . . . . . . . . 2-11
HP 70310A as a Slave in an HP 70000 Modular Spectrum Analyzer System . . 2-12
Front-Panel LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Checking for Error Messages: Spectrum Analyzer System with a Display . . 2-13
Checking for Error Messages: Spectrum Analyzer System with a Controller . 2-14
3. Speci cations
Frequency Reference Error . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Time-Dependent Error . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Temperature-Dependent Error . . . . . . . . . . . . . . . . . . . . . . . 3-2
Inputs and Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
100 MHz Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
10 MHz Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
External Reference Input . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Distribution Ampli er Input . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Distribution Ampli er Output . . . . . . . . . . . . . . . . . . . . . . . . 3-3
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
EMI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Warm-Up Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Power and Cooling Requirements . . . . . . . . . . . . . . . . . . . . . . 3-4
Contents-2
4. Veri cation
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
External Reference Input Test . . . . . . . . . . . . . . . . . . . . . . . . 4-2
10 MHz and 100 MHz Output Power Test . . . . . . . . . . . . . . . . . . . 4-5
10 MHz Output Spurs Test . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
10 MHz Output Harmonics Test . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Distribution Ampli er Test . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Oscillator Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
5. Troubleshooting
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Status/Error LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Usage/Operating Errors . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Hardware Warning Errors . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Hardware Broken Errors . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Index
Contents-3
Figures
1-1. Typical Serial Number Label . . . . . . . . . . . . . . . . . . . . . . . . 1-3
1-2. HP 70310A Module with Accessories . . . . . . . . . . . . . . . . . . . . 1-4
1-3. HP 70310A Module's Front- and Rear-Panel Features . . . . . . . . . . . . . 1-7
1-4. Static-Safe Work Station . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
1-5. Packaging Materials for Mainframe . . . . . . . . . . . . . . . . . . . . . 1-15
1-6. Packaging Materials for Modules . . . . . . . . . . . . . . . . . . . . . . 1-16
2-1. Address Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
2-2. Address Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
2-3. External Power Pack Installation . . . . . . . . . . . . . . . . . . . . . . 2-4
2-4. External Power Pack Line Voltage Selector . . . . . . . . . . . . . . . . . 2-5
2-5. External Power Pack Fuse Removal and Replacement . . . . . . . . . . . . 2-6
2-6. Module Installation in Mainframe . . . . . . . . . . . . . . . . . . . . . . 2-7
2-7. Cable Connection Example . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
4-1. External Reference Input Test Setup . . . . . . . . . . . . . . . . . . . . 4-3
4-2. 10 MHz and 100 MHz Output Power Test Setup . . . . . . . . . . . . . . . 4-6
4-3. 10 MHz Output Spurs Test Setup . . . . . . . . . . . . . . . . . . . . . . 4-8
4-4. 10 MHz Output Harmonics Test Setup . . . . . . . . . . . . . . . . . . . . 4-11
4-5. Distribution Ampli er Test Setup . . . . . . . . . . . . . . . . . . . . . . 4-13
4-6. Oscillator Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Tables
1-1. Static-Safe Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
1-2. Hewlett-Packard Spectrum Analyzer Sales and Service Oces . . . . . . . . 1-12
2-1. Decimal Equivalents of Row and Column Address Switches . . . . . . . . . . 2-3
2-2. External Power Pack Fuses . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
4-1. Equipment Required for Veri cation Tests . . . . . . . . . . . . . . . . . . 4-1
Contents-4
1
General Information
Introduction
The HP 70310A Installation and Veri cation Manual contains information needed to install
and verify the HP 70310A Precision Frequency Reference. For information on installing and
verifying HP 70000 Modular Measurement Systems, refer to the Installation and Veri cation
Manual for the system master (for example, HP 70900A Local Oscillator).
This manual contains the following ve chapters:
Chapter 1, \General Information," describes the module and its accessories, gives
electrostatic discharge and packaging information, and lists Hewlett-Packard Sales and
Service Oces.
Chapter 2, \Installation," provides information for con guring and installing the module in
an HP 70000 Modular Measurement System, or as a separate frequency reference.
Chapter 3, \Speci cations," lists module speci cations and characteristics.
Chapter 4, \Veri cation," contains information about the tests needed to verify module
speci cations, and provides a procedure for adjusting the module's internal oven/oscillator.
Chapter 5, \Troubleshooting," explains the most probable causes of the front-panel
status/error LEDs' lighting, and lists the error codes that can be generated by the HP 70310A
module.
Manual Conventions
The following descriptions are used throughout this manual:
Keys physically on an instrument are represented in the following way:
Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4KEY5
Softkeys, keys de ned by software or rmware, are represented in the following way: NNNNNNNNNNNNNNNNNNNNNNN
Softkey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . softkey
Text that appears on the CRT is represented in the following way:
Screen text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . screen text
General Information 1-1
Module Description
The HP 70310A Precision Frequency Reference is a 1/8-width module designed to plug into HP
70000 Modular Measurement System mainframes. The HP 70310A module provides 10 MHz
and 100 MHz precision reference signals for use by HP 70000 Modular Measurement Systems
and other instruments. The HP 70310A functions either by itself, as a separate frequency
reference, or as a slave to an HP 70000 Modular Measurement System master element such as
the HP 70900A Local Oscillator. When the HP 70310A is con gured as a slave, it is controlled
by the master element.
Module Options
The HP 70310A Precision Frequency Reference has the following module options:
Option W30 adds 2 years to the standard 1 year return to Hewlett-Packard service
warranty.
Option 001 adds two distribution ampli ers that accept inputs of 5 MHz to 300 MHz. Each
distribution ampli er has one input and three outputs.
Option 002 deletes the HP 70310A module's internal oven/oscillator and the external
power pack accessory. HP 70310A Option 002 modules must be connected to
an external-reference signal of 1, 2, 5, or 10 MHz to operate.
Option 910 adds another set of the manuals that normally ship with the module.
Option 915 adds the module service documentation and module veri cation software.
Safety Considerations
Before operating this module, familiarize yourself with any safety markings on the module
and the safety instructions in this manual. This module has been manufactured and tested
according to international safety standards. However, to ensure safe operation of the module
and personal safety of the user and service personnel, the cautions and warnings in this
manual must be followed. Refer to the summary of safety considerations at the front of this
manual.
Modules Covered by Manual
Serial Numbers
Attached to the front frame of the module is a serial-number label. The serial number is in two
parts. The rst four digits and letter are the serial number pre x; the last ve digits are the
sux. See Figure 1-1. The pre x is the same for all identical modules; it only changes when
a change is made to the module. The sux, however, is assigned sequentially and is dierent
for each module. The contents of this manual apply to modules with the serial number pre xes
listed under \Serial Numbers" on the manual title page.
1-2 General Information
Figure 1-1. Typical Serial Number Label
Manual Updating Supplement
A module manufactured after this manual was printed may have a serial number pre x other
than that listed under \Serial Numbers" on the manual title page. This unlisted serial pre x
means that changes have been made to the module since the manual was printed.
Any changes that aect this manual are documented in the Manual Updating Supplement
for this manual. The Manual Updating Supplement may also contain information for
correcting errors in the manual. To keep the manual as current and accurate as possible,
periodically request the latest Manual Updating Supplement for this manual from your nearest
Hewlett-Packard Sales and Service oce.
Initial Inspection
Inspect the shipping container for damage. If the shipping container or cushioning material
is damaged, it should be kept until the contents of the shipment have been checked for
completeness and the module has been checked mechanically and electrically. Refer to the
accessory information on the following pages to nd out what is shipped with the HP 70310A
Precision Frequency Reference.
If the shipping contents are not complete, or the module does not pass the procedures in
Chapter 4, notify the nearest Hewlett-Packard oce. If the shipping container is damaged, or
the cushioning material shows signs of stress, notify the carrier as well as the Hewlett-Packard
oce. Keep the shipping materials for the carrier's inspection. The Hewlett-Packard oce will
arrange for repair or replacement without waiting for claim settlement.
General Information 1-3
Figure 1-2. HP 70310A Module with Accessories
1-4 General Information
Accessories
The HP 70310A Precision Frequency Reference may be ordered separately or as part of a
precon gured HP 70000 Modular Measurement System. Figure 1-2 shows the HP 70310A
module and the accessories that may be shipped with it.
Front and Rear-Panel Features
Figure 1-3 shows the HP 70310A module's front- and rear-panel features.
Front-Panel Status and Error LEDs
All of the front-panel LEDs
ash on, then o again, during the module's self-test. Listed below
are the other reasons for each LED to light. For troubleshooting information, refer to Chapter
5.
ACT (Active) LED
The ACT LED lights when the module is activated by an HP 70000 Modular Measurement
System master (for example, HP 70900A).
ERR (Error) LED
The ERR LED lights when an error condition exists.
OVEN COLD LED
The OVEN COLD LED lights when the internal oven/oscillator assembly is not warmed up to
operating temperature. The OVEN COLD LED is not used in HP 70310A Option 002 modules
(internal oven/oscillator assembly deleted).
EXTERNAL REF (Reference) LED
The EXTERNAL REF LED lights when an appropriate external-reference signal is being
injected into the rear-panel EXT REF input.
PLL ERROR (Phase-Lock-Loop Error) LED
The PLL ERROR LED lights when the (internal or external) reference signal is either absent or
incorrect. An external-reference signal must be used with HP 70310A Option 002 modules.
Oscillator Adjustment Door
The oscillator adjustment door is removed to allow the internal oven/oscillator to be calibrated.
General Information 1-5
Module Latch
When the module is being installed in or removed from an HP 70000 Modular Measurement
System mainframe, an 8 mm hex-ball driver is used to turn the module latch.
Rear-Panel Inputs and Outputs
A 1 OUT, A 2 OUT, and A 3 OUT
These distribution-ampli er outputs are only present in HP 70310A Option 001 modules. The
output signals are approximately 0 dBm, and are leveled and isolated versions of the signal
being injected into A IN.
B 1 OUT, B 2 OUT, and B 3 OUT
These distribution-ampli er outputs are only present in HP 70310A Option 001 modules. The
output signals are approximately 0 dBm, and are leveled and isolated versions of the signal
being injected into B IN.
A IN
This distribution-ampli er input is only present in HP 70310A Option 001 modules. The signal
injected at A IN is leveled and distributed to the A outputs (A 1 OUT, A 2 OUT, and A 3 OUT).
The input signal must be from 5 to 300 MHz in frequency, with a power level of 04 to +4 dBm.
B IN
This distribution-ampli er input is only present in HP 70310A Option 001 modules. The signal
injected at B IN is leveled and distributed to the B outputs (B 1 OUT, B 2 OUT, and B 3 OUT).
The input signal must be from 5 to 300 MHz in frequency, with a power level of 04 to +4 dBm.
100 MHz
This output supplies a stable frequency-reference signal for use by HP 70000 Modular
Measurement Systems.
EXT PWR
The external power pack is plugged into this input. The external power pack supplies power
for the heater in the internal oven/oscillator while the system power is turned o.
The EXT PWR input is not present on HP 70310A Option 002 modules (no internal
oven/oscillator).
10 MHz
This output supplies a stable frequency-reference signal.
1-6 General Information
EXT REF
This input allows the use of an external-reference signal. The external-reference input signal
can have a frequency of 1, 2, 5, or 10 MHz, and a power range of 05 to +21 dBm. TTL signal
levels are acceptable. Refer to Chapter 3 for external-reference input speci cations.
When an acceptable external-reference signal is applied to the EXT REF input, the module
automatically switches to the external reference.
HP 70310A Option 002 modules must have an external-reference signal supplied. (HP 70310A
Option 002 modules do not have an internal oven/oscillator.)
Mainframe/Module Interconnect
This multiple-pin connector plugs into the mainframe and provides the power supplies and
Hewlett-Packard Modular System Interface Bus (HP-MSIB) for the module.
Figure 1-3. HP 70310A Module's Front- and Rear-Panel Features
General Information 1-7
Electrostatic Discharge Information
Electrostatic discharge (ESD) can damage or destroy electronic components. Therefore,
all work performed on assemblies consisting of electronic components should be done at a
static-safe work station.
Figure 1-4 shows an example of a static-safe work station. Two types of ESD protection are
shown: (a) conductive table mat and wrist strap combination, and (b) conductive
oor mat
and heel strap combination. The two types must be used together to ensure adequate ESD
protection. Refer to Table 1-1 for a list of static-safe accessories and their part numbers.
Figure 1-4. Static-Safe Work Station
Reducing ESD Damage
Below are suggestions that may help reduce the amount of ESD damage that occurs during
testing and servicing instruments.
PC Board Assemblies and Electronic Components
Handle these items at a static-safe work station.
Store or transport these items in static-shielding containers.
1-8 General Information
Caution Do not use erasers to clean the edge-connector contacts. Erasers generate static
electricity and degrade the electrical quality of the contacts by removing the
thin gold plating.
Do not use paper of any kind to clean the edge-connector contacts. Paper
or lint particles left on the contact surface can cause intermittent electrical
connections.
Do not touch the edge-connector contacts or trace surfaces with bare hands.
Always handle board assemblies by the edges.
PC board assembly edge-connector contacts may be cleaned by using a lint-free cloth with a
solution of 80% electronics-grade isopropyl alcohol and 20% deionized water. This procedure
should be performed at a static-safe work station.
Test Equipment
Before connecting any coaxial cable to an instrument connector for the rst time each day,
momentarily short the center and outer conductors of the cable together.
Caution Do not short the coaxial cable from the external power pack. Instrument
damage can result.
Personnel should be grounded with a resistor-isolated wrist strap before touching the center
pin of any connector and before removing any assembly from the instrument.
Be sure that all instruments are properly earth-grounded to prevent buildup of static charge.
General Information 1-9
Static-Safe Accessories
Table 1-1. Static-Safe Accessories
Accessory Description
HP Part Number
Static-control mat and ground Set includes: 9300-0797
wire
3M static-control mat, 0.6m 2 1.2m
(2 ft 2 4 ft)
ground wire, 4.6m (15 ft)
(The wrist strap and wrist-strap cord
are not included. They must be
ordered separately.)
Wrist-strap cord 1.5m (5 ft) 9300-0980
Wrist strap Black, stainless steel with four 9300-1383
adjustable links and 7-mm post-type
connector (The wrist-strap cord is not
included.)
ESD heel strap Reusable 6 to 12 months 9300-1169
Hard-surface static-control Large, black, 1.2m 2 1.5m (4 ft 2 5 ft) 92175A
mat*
Small, black, 0.9m 2 1.2m (3 ft 2 4 ft) 92175C
Soft-surface static-control mat* Brown, 1.2m 2 2.4m (4 ft 2 8 ft) 92175B
Tabletop static-control mat* 58 cm 2 76 cm (23 in. 2 30 in.) 92175T
Antistatic carpet* Small, 1.2m 2 1.8m (4 ft 2 6 ft)
natural color 92176A
russet color 92176C
Large, 1.2m 2 2.4m (4 ft 2 8 ft)
natural color 92176B
russet color 92176D
*These accessories can be ordered either through a Hewlett-Packard Sales Oce or
through HP DIRECT Phone Order Service. In the USA, the HP DIRECT phone number is
(800) 538-8787. Contact your nearest Hewlett-Packard Sales Oce for more information
about HP DIRECT availability in other countries.
1-10 General Information
Sales and Service Oces
Hewlett-Packard sales and service oces provide complete support for Hewlett-Packard
products. To obtain servicing information, or to order replacement parts, contact the nearest
Hewlett-Packard Sales and Service Oce listed in Table 1-2.
In any correspondence, be sure to include the pertinent information about model numbers,
serial numbers, or assembly part numbers.
General Information 1-11
Table 1-2.
Hewlett-Packard Spectrum Analyzer Sales and Service Oces
IN THE UNITED STATES IN AUSTRALIA IN JAPAN
California Hewlett-Packard Australia Ltd. Yokogawa-Hewlett-Packard
Ltd.
Hewlett-Packard Co. 31-41 Joseph Street 29-21 Takaido-Higashi, 3 Chome
1421 South Manhattan Ave. Blackburn, Victoria 3130 Suginami-ku Tokyo 168
P.O. Box 4230 895-2895 (03) 331-6111
Fullerton, CA 92631
(714) 999-6700 IN CANADA
Hewlett-Packard (Canada) Ltd. IN PEOPLE'S REPUBLIC
Hewlett-Packard Co. 17500 South Service Road OF CHINA
301 E. Evelyn Trans-Canada Highway China Hewlett-Packard, Ltd.
Mountain View, CA 94039 Kirkland, Quebec H9J 2X8 P.O. Box 9610, Beijing
(415) 694-2000 (514) 697-4232 4th Floor, 2nd Watch Factory
Main Bldg.
Colorado IN FRANCE Shuang Yu Shu, Bei San Huan
Rd.
Hewlett-Packard Co. Hewlett-Packard France Beijing, PRC
24 Inverness Place, East F-91947 Les Ulis Cedex 256-6888
Englewood, CO 80112 Orsay
(303) 649-5000 (6) 907-78-25
IN SINGAPORE
Georgia IN GERMAN FEDERAL Hewlett-Packard Singapore
Hewlett-Packard Co. REPUBLIC Pte. Ltd.
2000 South Park Place Hewlett-Packard GmbH 1150 Depot Road
P.O. Box 105005 Vertriebszentrale Frankfurt Singapore 0410
Atlanta, GA 30339 Berner Strasse 117 273 7388
(404) 955-1500 Postfach 560 140 Telex HPSGSO RS34209
D-6000 Frankfurt 56 Fax (65) 2788990
Illinois (0611) 50-04-1
Hewlett-Packard Co.
5201 Tollview Drive IN GREAT BRITAIN IN TAIWAN
Rolling Meadows, IL 60008 Hewlett-Packard Ltd. Hewlett-Packard Taiwan
(312) 255-9800 King Street Lane 8th Floor, Hewlett-Packard
Winnersh, Wokingham Building
New Jersey Berkshire RG11 5AR 337 Fu Hsing North Road
Hewlett-Packard Co. 0734 784774 Taipei
120 W. Century Road (02) 712-0404
Paramus, NJ 07653 IN OTHER EUROPEAN
(201) 265-5000 COUNTRIES
Hewlett-Packard (Schweiz) AG IN ALL OTHER LOCATIONS
Texas Allmend 2 Hewlett-Packard
Inter-Americas
Hewlett-Packard Co. CH-8967 Widen (Zurich) 3495 Deer Creek Rd.
930 E. Campbell Rd. (0041) 57 31 21 11 Palo Alto, California 94304
Richardson, TX 75081
(214) 231-6101
1-12 General Information
Returning Instruments for Service
The original shipping containers and materials, or the equivalent, must be used when
repackaging the mainframe with modules, or modules alone. Packaging materials identical to
the original factory packaging can be purchased through any Hewlett-Packard oce.
Figures 1-5 and 1-6 show the packaging materials. When ordering packaging materials to ship
modules, it is necessary to order the proper number of foam inserts. No foam inserts are
required for a 3/8-width module such as the HP 70205A Graphics Display. One foam insert is
required for a 2/8-width module such as the HP 70900A Local Oscillator. Two foam inserts are
required for a 1/8-width module such as the HP 70902A IF Section.
Caution Instrument damage can result from using packaging materials other than
those speci ed. Never use styrene pellets as packaging materials. They do not
adequately cushion the instrument or prevent it from shifting in the carton.
They cause instrument damage by generating static electricity.
Use the following procedure to prepare the instrument for shipment:
1. Fill out a blue repair card (located at the end of this manual) and attach it to the
instrument. If you have recorded any error messages or have any other speci c data on the
performance of the instrument, also send a copy of this information with the instrument.
If a blue repair card is not available, make sure the following information is sent with the
returned instrument:
a. Type of service required.
b. Description of the problem; state if the problem is constant or intermittent.
c. Name and phone number of technical contact person.
d. Return address.
e. Model number of returned instrument.
f. Full serial number of returned instrument.
g. List of any accessories returned with instrument.
2. Pack the instrument in the appropriate packaging materials. (See Figures 1-5 and 1-6.)
Original shipping materials or the equivalent should be used. However, if the original
shipping materials are not available and equivalent materials cannot be ordered, instruments
can be repackaged for shipment using the following instructions.
Caution Inappropriate packaging of instruments may result in damage to the
instruments during transit.
a. Wrap the instrument in anti-static plastic to reduce the possibility of damage caused by
ESD.
b. For instruments that weigh less than 54 kg (120 lb), use a double-walled, corrugated
cardboard carton of 159 kg (350 lb) test strength. The carton must be large enough and
strong enough to accommodate the instrument. Allow at least three to four inches on all
sides of the instrument for packing material.
c. Surround the equipment with three to four inches of packing material, to protect the
instrument and prevent it from moving in the carton. If packing foam is not available,
the best alternative is S.D.-240 Air CapTM from Sealed Air Corporation (Commerce,
California 90001). Air Cap looks like a plastic sheet lled with 1-1/4 inch air bubbles. Use
General Information 1-13
the pink (antistatic) Air Cap to reduce static electricity. Wrapping the instrument several
times in this material should both protect the instrument and prevent it from moving in
the carton.
3. Seal the carton with strong nylon adhesive tape.
4. Mark the carton \FRAGILE, HANDLE WITH CARE."
5. Retain copies of all shipping papers.
1-14 General Information
Item HP Part Number CD Qty Description
1 9211-4487 3 1 Carton-Outer
2 5180-2321 9 1 Carton-Inner
3 5180-2319 5 2 Foam Pad*
5180-7829 2 2 Foam Pady
*This is used for packaging the HP 70001A.
y This is used for packaging the HP 70206A.
&sigspace;
Figure 1-5. Packaging Materials for Mainframe
General Information 1-15
Item HP Part Number CD Qty Description
1 9211-5118 9 1 Carton-Outer
2 9211-5119 0 1 Carton-Inner
3 5180-2369 5 1 Carton-Slider
4 4280-0493 3 2 Foam Insert
5 5180-2370 8 2 Foam Pad
&sigspace;
Figure 1-6. Packaging Materials for Modules
1-16 General Information
2
Installation
Introduction
This chapter contains information needed to install the HP 70310A Precision Frequency
Reference into an HP 70000 Modular Measurement System mainframe, and to check the basic
operation of the module. Chapter 4 contains the tests needed to verify that the module meets
its speci cations.
The examples of addressing and cable connections in this chapter are for an HP 71210A
Microwave Spectrum Analyzer system. For more detailed information about HP 70000 Modular
Measurement System con guration and addressing, refer to the Installation and Veri cation
Manual for the system master (for example, HP 70900A Local Oscillator).
To use the HP 70310A module as a separate frequency reference, refer to Chapter 1 for general
information about the module's inputs and outputs, and to Chapter 3 for information about
input requirements and output capabilities.
Installing the module in an HP 70000 Modular Measurement System requires the following
steps:
1. Addressing the module.
2. Installing the external power pack (not done for HP 70310A Option 002 modules).
3. Installing the module into the mainframe.
4. Connecting the rear-panel cables.
Installing the module as a separate frequency reference (that is, not part of an HP 70000
Modular Measurement System) requires the following steps:
1. Installing the external power pack (not done for HP 70310A Option 002 modules).
2. Installing the module into the mainframe.
3. Connecting the appropriate rear-panel input and output cables.
When properly installed, the HP 70310A module obtains both power and interface-bus control
through the module's rear-panel mainframe/module interconnect. After the module is installed,
use the information in \Checking Module Operation" to make sure that the module has been
properly installed and is not faulty.
Installation 2-1
Addressing the Module
The HP 70310A module needs an appropriate Hewlett-Packard Modular System Interface
Bus (HP-MSIB) address to be able to communicate with the master of the HP 70000 Modular
Measurement System. The HP 70310A module's HP-MSIB address is set using the module's
ROW and COLUMN address switches.
Determining the HP-MSIB Address
The HP 70310A module has a factory-preset HP-MSIB address of 7, 19 (row 7, column 19).
Figure 2-1 shows the address map for an HP 71210A system. The addresses in this gure are
the factory-preset addresses for the modules.
Figure 2-1. Address Map
If the HP 70310A module is going to be used in an HP 70000 Modular Spectrum Analyzer
System where the modules all have their factory-preset addresses, the HP 70310A module
probably will not need to have its factory-preset address changed. However, if the
factory-preset addresses of the modules in the system have been changed, or if the HP
70310A module is being used in another type of HP 70000 Modular Measurement System, the
HP 70310A module's factory-preset address may need to be changed.
Changing HP-MSIB addresses requires an understanding of HP-MSIB addressing rules. For
information on determining and assigning HP-MSIB addresses, refer to the Installation and
Veri cation Manual for the system master (for example, HP 70900A Local Oscillator).
2-2 Installation
Setting the HP-MSIB Address Switches
The HP 70310A module's address switches are located on the left side of the module. Table 2-1
gives the decimal value for each address switch when the switch is set to binary 1 (on).
Table 2-1. Decimal Equivalents of Row and Column Address Switches
Address Switch Decimal Value
Row
3* 4
2* 2
1* 1
Column
5* 16
4 8
3 4
2* 2
1* 1
*These switches are factory-preset to binary 1
(on), resulting in an HP-MSIB address of 7, 19
(row 7, column 19).
Use the procedure below to change the address switches:
1. Set the three ROW switches to the binary value of the module's HP-MSIB row number. For
example, if the row number is 7, change the switches to binary 111 as shown in Figure 2-2.
2. Set the ve COLUMN switches to the binary value of the module's HP-MSIB column number.
For example, if the column number is 19, change the switches to binary 10011 as shown in
Figure 2-2.
Figure 2-2. Address Switches
Installation 2-3
Figure 2-3. External Power Pack Installation
2-4 Installation
Installing the External Power Pack
The external power pack provides power to the HP 70310A module to maintain the
temperature in the module's internal oven/oscillator when the mainframe is turned o. An
HP 70310A Option 002 module does not have an internal oven/oscillator and, therefore, does
not need an external power pack.
Caution Install the HP 70310A module into the mainframe and connect the external
power pack to the HP 70310A module before plugging the external power pack
into the ac power source. If the external power pack is incorrectly connected
its fuse can open, resulting in a 6015 Oven cold error at power-on. Refer
to \Fuse Replacement" in this chapter for fuse location and replacement
information.
The external power pack can be installed on the rear of the mainframe or on an equipment
rack. For installation information, refer to Figure 2-3 or to the instructions shipped with the
power-pack rack-mount kit.
Line Voltage Selector
The line voltage selector on the external power pack must be set to correspond with the
voltage of the ac power source. For example, Figure 2-4 shows the line voltage selector set to
100 volts.
Caution The external power pack can be damaged if its line voltage selector is not set
correctly before the external power pack is plugged into the ac power source.
Figure 2-4. External Power Pack Line Voltage Selector
AC Power Source
The external power pack must be plugged into an appropriate ac power source before it will
function. However, do not plug the external power pack into the ac power source until the
HP 70310A module has been installed in the mainframe and the external power pack cable has
been connected to the module's rear-panel EXT PWR connector.
In accordance with international safety standards, the external power pack is equipped with a
three-wire ac power cable. When connected to an appropriate ac power receptacle, this cable
grounds the external power pack.
The type of power cable shipped with the external power pack depends on the country
of destination. If additional or dierent cables are needed, refer to the Installation and
Veri cation Manual for the system master.
Installation 2-5
Warning Before plugging the external power pack into the ac power source, verify
that the external power pack and the power cable are not damaged, and
that the power-source socket outlet is provided with protective earth
contact. Any interruption of the protective (grounding) conductor inside
or outside of the external power pack, or disconnection of the protective
earth terminal, can result in personal injury.
Fuse Replacement
The external power pack's line fuse, and a spare fuse, are located in the line cord receptacle
housing on the left side of the external power pack. See Figure 2-5 for fuse removal and
replacement information.
The fuse shipped with the external power pack depends on the line voltage used in the country
of destination. Table 2-2 shows the fuse value and part number for the dierent line voltages.
Table 2-2. External Power Pack Fuses
Line Voltage HP Part Number CD Description
100 V to 120 V 2110-0717 3 Fuse|glass 0.250 A 250 V MAX
220 V to 240 V 2110-0718 4 Fuse|glass 0.125 A 250 V MAX
Figure 2-5. External Power Pack Fuse Removal and Replacement
2-6 Installation
Installing the Module in the Mainframe
The HP 70310A module needs to be installed in an HP 70000 Modular Measurement System
mainframe before it will operate. Follow the procedure below to install the module into the
mainframe. See Figure 2-6 for identi cation of the module and mainframe parts called out in
the procedure.
1. Turn the mainframe LINE switch o.
2. Open the mainframe front-panel door.
3. Slide the module into the mainframe.
4. Press against the module front panel while tightening the module latch with an 8 mm
hex-ball driver.
5. Close the mainframe front-panel door.
Figure 2-6. Module Installation in Mainframe
Installation 2-7
Connecting the Rear-Panel Cables
This section contains the following information:
Instructions for connecting the HP 70310A standard module when it is used in an HP 71210A
Microwave Spectrum Analyzer system, and a list of additional connections that are available
for a standard module.
Information about connecting HP 70310A Option 001 modules.
Information about connecting HP 70310A Option 002 modules.
Refer to Chapter 3 for input and output speci cations and characteristics.
HP 70310A Standard
Figure 2-7 shows the rear-panel connections of an HP 71210A system. The HP 70310A module
shown in this example is a standard module that is using its internal oven/oscillator as the
frequency reference.
HP 71210A System Connections
Follow the steps below to connect the HP 70310A module as shown in Figure 2-7:
1. Connect the external power-pack cable to the HP 70310A module's rear-panel EXT PWR
connector.
2. Plug the external power-pack line cord into an appropriate ac power source.
3. Connect the HP 70310A module's 100 MHz output to the HP 70900A module's 100 MHz IN
connector.
Other Con gurations
In addition to the connections shown in Figure 2-7, a standard HP 70310A module has the
following connections available:
An external frequency-reference signal can be connected to the module's EXT REF input
connector. If an external frequency-reference signal is connected, the module's internal
frequency reference is automatically switched o.
The module's 10 MHz output can be used to provide a stable 10 MHz reference frequency to
another instrument.
2-8 Installation
Figure 2-7. Cable Connection Example
HP 70310A Option 001
An HP 70310A Option 001 module has the features of a standard module, plus two distribution
ampli ers. Each distribution ampli er has one input and three outputs.
HP 71210A System Connections
To use an HP 70310A Option 001 in an HP 71210A system, use the instructions given above for
the standard module.
Other Con gurations
The HP 70310A Option 001 module has the following connections available:
A reference-frequency signal, with a frequency of 5 to 300 MHz, can be connected
to the module's A IN connector. This provides three reference-frequency outputs:
A 1 OUT, A 2 OUT, and A 3 OUT. These outputs will have the same frequency as the
reference-frequency signal at A IN.
A reference-frequency signal, with a frequency of 5 to 300 MHz, can be connected
to the module's B IN connector. This provides three reference-frequency outputs: B
1 OUT, B 2 OUT, and B 3 OUT. These outputs will have the same frequency as the
reference-frequency signal at B IN.
The 100 MHz output supplies a stable frequency-reference signal for use by HP 70000
Modular Measurement Systems and other instruments.
The external power pack can be connected to the EXT PWR input to maintain the
temperature of the module's internal oven/oscillator when the mainframe is turned o.
The module's 10 MHz output can be used to provide a stable 10 MHz reference frequency to
another instrument.
An external frequency-reference signal can be connected to the module's EXT REF input
connector. If an external frequency-reference signal is connected, the module's internal
frequency reference is automatically switched o.
Installation 2-9
HP 70310A Option 002
The HP 70310A Option 002 module does not have an internal oven/oscillator. The other module
features are the same as the standard HP 70310A module.
HP 71210A System Connections
Follow the steps below to use an HP 70310A Option 002 module in an HP 71210A system:
1. Connect the HP 70310A module's 100 MHz output to the HP 70900A module's 100 MHz IN
connector.
2. Connect an appropriate external frequency reference to the HP 70310A module's EXT REF
connector. (Refer to Chapter 3 for external frequency-reference requirements.)
Note If the 6014 PLL error or 6016 No Freq Reference error codes are displayed
at instrument power-up, make sure that an appropriate external frequency
reference is connected to any HP 70310A Option 002 modules in the system.
Other Con gurations
The HP 70310A Option 002 module has the following connections available:
The module's 100 MHz output supplies a stable frequency-reference signal for use by
HP 70000 Modular Measurement Systems and other instruments.
The module's 10 MHz output can be used to provide a stable 10 MHz reference frequency to
another instrument.
An external frequency reference must be connected to the HP 70310A Option 002 module's
rear-panel EXT REF connector.
Note HP 70310A Option 002 modules do not have an external power pack
connected.
2-10 Installation
Checking Module Operation
The HP 70310A Precision Frequency Reference can be con gured as a separate frequency
reference (installed in an HP 70000 Modular Measurement System mainframe) or as a slave in
an HP 70000 Modular Measurement System. Module-operation checks are given below for the
following con gurations:
HP 70310A module used as a separate frequency reference.
HP 70310A module used as a slave in an HP 70000 Modular Measurement System that has an
HP 70900A Local Oscillator as the system master.
HP 70310A as a Separate Frequency Reference
The operation of the HP 70310A module as a separate frequency reference is veri ed by
checking the results of the module's power-on self-test.
The results of the self-test can be determined by examining the status of the module's LEDs.
An HP 70000 Modular Measurement System display can also be used to check for error
messages.
Front-Panel LEDs
The power-on self-test runs automatically when power is rst applied to the module. The
listing below describes what the status of the LEDs should be immediately after the self-test
has run.
The ACT LED should be o.
The ERR LED should be on if the oven/oscillator is still cold. The ERR LED may stay
on when the OVEN COLD LED goes o. If this happens, cycling the power (turning the
mainframe o, then quickly turning it on again) should result in the ERR LED going o. HP
70310A Option 002 modules should not have the ERR LED go on.
The OVEN COLD LED should be on if the oven/oscillator is still cold. This LED should go o
approximately fteen minutes after power-on if the module was stored at room temperature.
HP 70310A Option 002 modules should not have the OVEN COLD LED go on.
The EXTERNAL REF LED should be o if the internal frequency reference is being used.
The EXTERNAL REF LED should go on when an appropriate external reference is connected
to the HP 70310A module.
The PLL ERROR LED should be o.
Checking for Error Messages
If the HP 70310A module's ERR LED remains on, an HP 70000 Modular Measurement System
display can be used to determine what error is occurring.
Note Remove all master elements or systems from the HP-MSIB before using the
following troubleshooting procedure. If there are any master elements or
systems on the HP-MSIB when this procedure is performed, the system or
master may cease communication and the procedure may not work.
Installation 2-11
Use the following troubleshooting procedure to nd out what error conditions exist:
1. Remove the HP 70310A module from the mainframe.
2. Change the ROW address to 0 (binary 000).
3. Reinstall the module into the mainframe.
4. Connect a display to the HP-MSIB by installing a plug-in display into the mainframe or
connecting a stand-alone display to the mainframe's HP-MSIB.
5. First press 4DISPLAY5, then REPORT ERRORS .
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
6. Note the errors that are listed on the CRT, then refer to Chapter 5, \Troubleshooting," for
more information about those errors. Change the ROW address back to 7 (binary 111) before
doing more troubleshooting.
HP 70310A as a Slave in an HP 70000 Modular Spectrum Analyzer System
The operation of the HP 70310A module in an HP 70000 Modular Spectrum Analyzer system is
veri ed by checking the results of the module's power-on self-test, and by making sure that the
local oscillator in the system is using an external frequency reference.
The results of the self-test are determined by examining the front-panel LEDs and by checking
for error messages.
To verify that the local oscillator is using an external frequency reference, the local oscillator
is queried using an HP 70000 Modular Measurement System display or an HP 9000 Series 200
controller.
Front-Panel LEDs
The power-on self-test runs automatically when power is rst applied to the module. The
following listing describes what the status of the LEDs should be immediately after the self-test
has run.
The ACT LED should be on.
The ERR LED should be on if the oven/oscillator is still cold. The ERR LED should go o
when the OVEN COLD LED goes o. HP 70310A Option 002 modules should not have the
ERR LED go on.
The OVEN COLD LED should be on if the oven/oscillator is still