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 Operating Manual

Operation Model 8642A/B
Modulation, AM (cont'd)
INT
How to Set AM with the Internal Source (Using the Modulation Oscillator)
Source
nflvn mm
Rate
1 MOD FREQ I and the desired modulation frequency (in kHz or Hz).
Depth
1 AM J 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.
LOCAL
(keys)
(program
codes)
ENTRY
E
MODULATION SOURCE
(
I N T
I
ENTRY
I MOD I
I FREQ I
DATA
mmisj
ENTRY
(~*»n
DATA
nn fo
-
]
L U
AMNT MF 12 KZ AM 80 PC
Display
m n T i c r p i ^j ni pt u ~? n ni rx p r~ . i u rx m TI m
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
CAUTION |
Do not apply more than 1 5 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).
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