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HEWLETT-PACKARD
JOURNAL
T E C H N I C A L I N F O R M A T I O N F R O M T H E - h p - L A B O R A T O R I E S
Vol. 14, No. 1
>UBLISHED BY THE HEWLETT-PACKARD COMPANY, 1501 PAGE MILL ROAD, PALO ALTO, CALIFORNIA JULY, 1963
An 800-2400 MC Signal Generator
with Automatically-Leveled Output Power
SOME years ago -hp- introduced a series of has now given rise to a new generation of -hp-
broadband microwave signal generators microwave generators. The first of these, the
which were designed with direct-reading RF subject of this article, operates over the band
controls in place of the indirect readout from 800 to 2400 megacycles and provides an
arrangements used previously. During the RF power output that is virtually flat (within
years since, these generators have become ±0.5 db) over this entire range. The flat output
widely known and used in the microwave is obtained by an automatic internal leveling
field1'2. system and eliminates the need for readjusting
This long experi the output power at each change of frequency,
SEE ALSO: ence with microwave thus facilitating many measurements. A flat
"Variable-Frequency
signal generators output also offers other measurement con
AC Supply", p. 6
combined with the veniences which are described later.
development of new technological advances Besides providing leveled power, the new
'Arthur Fong and W. D. Myers, "The -hp- Direct-Reading UHF Signal
Generators," Hewlett-Packard Journal, Vol. 3, No. 9-10, May-June,
generator has a special cavity and attenuator
1952.
2W. D. Myers, "A 3800-7600 Me Signal Generator Using A Parallel-
design which gives increased maximum output
Plane Type Resonator," Hewlett-Packard Journal, Vol. 2, No. 1,
Sept., 1950. power. Output powers from 10 to 60 mw,
Fig. 1. New -hp- Model 8614 A Signal Generator oper Fig. 2. Oscillograms of modulation en
ates from 800 to 2400 Me and provides outputs up to velope obtained when new generator was
10 to 60 mw. Generator is designed to provide leveled )0% amplitude-modulated by 10 kc sine
output, is also capable of being sine-wave modulated. wave at carrier of 1,000 Me.
P R I N T E D I N U . S . A . C O P Y R I G H T 1 9 6 3 H E W L E T T - P A C K A R D C O