Int; How To Set Fm With The Internal Source (Using The Modulation Oscillator) - HP 8642A Operation And Calibration Manual

Model 8642A/B
Operation
Modulation, FM (cont'd)
Procedures
INT
Note: Put the instrument in its initialized state by selecting ( INSTR PRESET
J.
FM can be configured to use either the Signal Generator's internal modulation oscillator,
an external source, or combinations of the two sources.
How to Set FM with the Internal Source (Using the Modulation Oscillator)
Source
ctID O!ITJ
Rate
[ MOD FREQ ) and the desired value of modulation frequency (in kHz or Hz).
Deviation
c:.EElJ
and the desired value of FM deviation (in MHz, kHz, or Hz).
Example
Frequency modulate the RF output using the internal modulation oscillator, at a 12 kHz
rate, with 80 kHz FM deviation.
ENTRY MODULATION SOURCE ENTRY DATA ENTRY DATA
lOCAL
(keys)
GJ
~
c;D
fREO
OJ
CD
(~~) GJ OJ OJ
au
mV
~
(program
FMNT MF 12 KZ FM 80 KZ'
codes)
*
These codes are not independent and might need to follow a specific sequence for
entry. Refer to the discussion about Sequence Dependency, which begins on page 3 -12 in
the HP-IB portion of this Section III.
Display
.....
mo
].F R
t 2.0 0 ~~ Z 8 0.0 ~~ Z
- , L-{ nt nt TI
m
r lU.lU..LI
I,
'"
INT AMPTO
The RF output is being internally frequency modulated (as indicated by the FM and INT
annunciators), FM deviation is 80.0 kHz. Modulation frequency is set to 12.00 kHz.
The cursor above the FM setting indicates that FM is the active function.
3-107