HP 8642A Operation And Calibration Manual

Model 8642A/B
Description
Operation
MODULATION, <I>M
The Signal Generator can phase modulate its RF output either with a variable internal
modulation oscillator and/or with an ac- or dc-coupled external source applied to the
FM/<I>M INPUT.
Depending on the RF frequency selected, the 8642A/B has different limits on the
possi ble
cl> M devia tion that ca n be selected. (See Figure 3 - I 5 on page 3 - I 20.) The Signal
Generator normally selects the divide bands to obtain its FM deviation. However, if the
divide band's
maximum internal FM deviation boundaries are crossed, the Signal
Generator can automatically switch to the heterodyne band which allows wider
deviation <l>M at RF frequencies less than 132.187501 MHz. (Refer to RF Frequency,
page
3- 39, for more information about these different bands.)
Table 3-22. <l>M Operating Characteristics
Electrical Performance
Conditions
Characteristics Limits
<PM Deviation Limitations
See Figure 3-15
Accuracy
:t{5%
of setting +0.09 radians) 1 kHz rate
Resolution 0.7%
of setting or
0.0004% of maximum deviation
(whichever
is larger)
Distortion <0.4%
1 kHz rate
<PM 3 dB Bandwidth 20 Hz to 15 kHz Internal and external ac
de to 15 kHz
External de
3-11 q

HP 8642A Specifications

General

Brand	HP
Model	8642A
Category	Inverter
Language	English