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DIGITAL STORAGE
O~CILLOSCOPE
054000
Instruction Manual
-} GOULD
Telephone 01-500 1000
Telegrams Attenuate Ilford
Telex 263785
Contents
SECTION 1 Introduction 4 ILLUSTRATIONS
Fig. 1 Alias Effects 10
SECTION 2 Specification 5 Fig. 2 Block Diagram of Instrument 12
Fig. 3 Block Diagram of ADC '16
SECTION 3 Operating Instructions 6 Fig. 4 Typical Signal Waveforms (ADC) 17
3.1 Supplies 6 Fig. 5 Timing Signal Waveforms (ADC) 18
3.2 C.R.T. Controls 6 Fig. 6 Timing Chart (ADC) 19
3.3 Y Channel Controls 6 Fig. 7 Logic Block Diagram:
3.4 Timebase Controls 6 Refreshed Mode 20
3.5 Store Controls 7 Fig. 8 Tim ing Diagram: Refreshed
3.6 Alias Effects 8 Mode 21
3.7 Additional Facil ities 9 Fig. 9 Tim ing Diagram: Address
3.8 Functional Checks 9 Sequence 22
Fig. 10 Logic Block Diagram: Roll Mode 23
SECTION 4 CIRCUIT DESCRIPTION 12 Fig. 11 Timing Diagram: Roll Mode 24
4.1 System Description 12 Fig. 12 Simplified Control Logic 28
4.2 Power Supplies 13 Fig. 13 Timebase Block Diagram:
4.3 Y Amplifier 14 Normal Mode 30
4.4 Analogue-Digital Converter 16 Fig. 14 Bottom View 37
4.5 Store and Control Logic 20 Fig. 15 Righthand View 37
4.6 Mode Control 27 Fig. 16 R ighthand View: Maintenance
4.7 Trigger and Timebase 30 Position 38
4.8 D-A Converter and Dot Joiner 34 Fig. 17 Control Condition Table 40
4.9 Calibrator 35 Fig. 18 Data Faults 50
Fig. 19 ADC Waveforms 51
SECTION 5 Maintenance 36 Fig. 20 Circuit Diagram: Power Supplies,
5.1 General 36 Y Output and Blanking 57
5.2 Mechanical Assembly 36 Fig. 21 Circuit Diagram: Pre-amplifiers 59
5.3 Fault Finding 39 Fig. 22 Circuit Diagram: A-D Converter 63
5.4 Calibration Procedure 52 Fig. 23 Circuit Diagram: Timing and
5.5 Wiring details for l00V operation 52 Store Logic 69
Fig. 24 Circuit Diagram: Timebase 71
SECTION 6 Circuit Diagrams and
Fig. 25 Circuit Diagram: D-A Converter
Component Schedules 55
and Dot Joiner 73
Fig. 26 Interconnection Diagram 75
SECTION 7 Guarantee and Service Facilities 79
Fig. 27 Mechanical Views 77
Section 1
The Gould Advance OS4000 Digital Storage Oscilloscope oscilloscope with the addition of the minimum number of
is a versatile instrument which combines conventional additional controls for the storage functions.
lOMHz oscilloscope performance with a digital storage APPLICATIONS
system, capable of storing signals up to 450kHz. The The OS4000 is "ideally suited for viewing:
digital method of storage offers several advantages over 1. Transient waveforms, e.g. in Medical, dynamic testing,
the more common tube storage, notably the facility of vibration, pulse testing application.
pre-trigger viewing, the simultaneous viewing of a stored 2. All LF applications where the 'Refresh' mode
and a real-time display, absence of deterioration of the eliminates flicker. The slowest sweep speed of 200s
stored display with time, completely flicker free, low maximum allows the instrument to be used for new
frequency performance, and the abolition of the very classes of viewing application.
expensive storage tube. 3. Normal (real time) viewing with the 10MHz real time
Careful attention to the ergonomic design allows the performance.
OS4000 to be operated in the same way as a conventional 4. Comparisons between stored and real time waveforms.
Specification Section 2
DISPLAY FASTEST RISE TIME
8 x 10 cm rectangular CRT operating at 4kV For step response: 0.551ls single trace
Illuminated graticule I.Ills dual trace or Alt. Lock
(Equivalent Bandwidth 600kHz and
VERTICAL DEFLECTION
300kHz)
Two identical input channels
Maximum Storage 450kHz single trace
Bandwidth: DC-lOMHz in the Normal mode
Frequency - 3 db: 225kHz dual trace or Alt. Lock
Sensitivity: 5mV/cm to 20V/cm in 12 ranges
Limited Store: For timebase speeds faster than
Uncalibrated fine gain control gives between
SOils/cm the number of samples per
range sensitivity adjustment
cm is reduced in proportion to the
Accuracy: