Int; How To Set Am With The Internal Source (Using The Modulation Oscillator); Ext Ac, Ext Dc; How To Set Am With An External Source - HP 8642A Operation And Calibration Manual

Operation
Model 8642A/B
Modulation, AM (cont'd)
3-98
INT
How to Set AM with the Internal Source (Using the Modulation Oscillator)
Source
0ThD OIITJ
Rate
(1V1OIJ FREQ 1 and the desired modulation frequency (in kHz or Hz).
Depth
0ThD
and the desired modulation depth (in %).
Example
Amplitude modulate the RF output using the internal modulation oscillator, 80% AM
depth, at a 12 kHz rate.
ENTRY
MODULATION SOURCE
LOCAL
(keys)
~
0
~
(program
codes)
Display
m
rtTlFR
/1/-1
.LI. - \"
ENTRY DATA
(];]
fRED
OJ [[]
c;[J
mV
AMNT MF 12 KZ AM 80 PC
...
8
f'71f'71pr
t../.t../ '-
INT
ENTRY DATA
0
OJ OJ C!J
_ / l-{
f'7I f'7I
T/
m
I
t../.t../.LI
//1
AMPTD
The RF output is being internally amplitude modulated (as indicated by the AM and
INT annunciators). AM depth is 80.0%. Modulation frequency is set to 12.00 kHz.
The cursor above the AM setting indicates that AM is the active function.
EXT AC, EXT DC
How to Set AM with an External Source
Source
Do not apply more than 15 Vpk maximum external voltage to the
AM/PULSE INPUT or damage to the Signal Generator's circuitry
could result.
The external modulation source connects to the AM/PULSE INPUT connector (input
impedance of 600 ohms).