IFR FM/AM-1200A

STEP
3 •
PROCEDURE
b. Select "INTL'' with VAR Tone Selector Switch (5) and adjust
VAR Tone Level Control (6) for 5 kHz as displayed on
MODULATION Meter (1) and Scope Display (31).
c. If 1 kHz Tone Generator output is preferred, select "INTL''
with 1 kHz Tone Selector Switch and adjust 1 kHz Tone Level
Control (8) for 5 kHz as displayed on MODULATION Meter (1)
and Scope Display (31).
d •
If both tone generators are used as modulation
sources, the MODULATION Meter (1) and CRT Dis-
play (31) will display the composite modulation
signal produced by both tone generators. To
monitor either individual modulation signal,
one generator must be turned off.
The FM/AM-1200S/A is
5 kHz FM deviation.
Table 4-7 to monitor
now generating
Use monitoring
desired signal
a carrier signal with
features outlined in
parameters.
For AM modulation, place MODULATION Select Con-
trol (3) to ''AM NORM" position. Adjust either
the 1 kHz or VAR Tone Level Controls for proper
percent modulation as viewerl on MODULATION
Meter (1) and Scope Display (31).
Modulating the FM/AM-1200S/A Generator with DTMF.
a. Program desired telephone number into DTMF memory location.
When desired telephone number is executed, it will be
modulated at approximately 3.5 kHz.
4. Modulating the FM/AM-1200S/A Generator with DCS.
a. Program DCS code number into memory. To monitor DCS code
on FM/AM-1200S/A, place VAR Tone Selector Switch (5) to
"INTL" and adjust VAR Tone Level Control for desired
modulation level.
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