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HEWLETT-PACKARD
JOURNAL
TECHNICAL INFORMATION FROM THE -dp- LABORATORIES
^H
Vol. 8 No. 6
5LISHED BY THE HEWLETT-PACKARD COMPANY, 275 PAGE MILL ROAD, PALO ALTO, CALIFORNIA FEBRUARY, 1957
A New 8-12 KMC Voltage -Tuned Sweep Oscillator
For Faster Microwave Evaluations
ONE of the tools that has been needed in advantage of being voltage tuned. Use of this
the microwave region has been a flexible tube also permits the instrument to be capable
sweep oscillator. In addition to conventional of both amplitude and frequency modulation.
uses, such an oscillator, when combined with These modulation capabilities further make
the proper external components, has special the instrument suitable for forming into a
value in the microwave region in that it per general-purpose swept or non-swept signal
mits rapid wide-range evaluations to be made generator by use of an external calibrated at
not only of reflection but of gain, attenuation, tenuator.
and other network transfer characteristics as The flexibility of the new oscillator is in
well. dicated in detail by the controls provided on
The new -hp- 8.2 - 12.4 kmc sweep oscillator the panel (Fig. 1). The main frequency dial
shown in Fig. 1 has been designed for such ap is a large six-inch dial which is accurate within
plications and to that end provides any amount a few percent. An 8: 1 rim drive vernier is pro
of sweep width up to 4.2 kmc at a wide range vided for fine frequency adjustment.
of sweep rates. A special feature of the sweep The sweep controls are located at the upper
is that it is linear over the entire 8.2 - 12.4 kmc right of the panel. The upper control adjusts
band. Output power is relatively high