OPERATION MANUAL
IFF-701Ti
1-2-3
Page 7
Jul 1/00
3.13 COMMUNICATION OPERATION
(RECEIVER TESTS)
(TYPICAL CONTROL SETTINGS)
STEP PROCEDURE
1. MONITOR METER FUNCTION
Switch
RF to verify proper leveling of
internal Signal Generator on the
MONITOR Meter.
30% or 100% to verify or set 30%
sine-wave modulation tone on the
MONITOR Meter.
2. COUNTER MODE Switch
GEN to read out the Signal
Generator frequency on the DIGITAL
Display when operating in fixed
(FIXED) or variable (VAR) modes.
3. FREQUENCY MODE Switch
COM FIXED is mandatory in ramp
operation and is used on bench for a
stable channel center frequency.
COM 25 KHz to check COM Receiver
channels. Set VAR FREQ Controls
as desired from 118.000 to
156.000 MHz, in 25 KHz steps.
COM 8.33 KHz to check COM
Receiver channels. Set VAR FREQ
Controls as desired from 118.000 to
156.000 MHz, in 8.33 kHz steps.
(See Table 1)
4. VAR FREQ Controls (FREQUENCY
MODE Switches set to COM
25 KHz or COM 8.33 KHz)
Use as needed to change COM
frequency in 25 kHz steps or
8.33 kHz steps as determined by the
frequency mode switch.
5. TUNE Control
Adjust until TUNE Indicator stops
illuminating, indicating Signal
Generator is in the fine tune range.
STEP PROCEDURE
6. FINE TUNE Switch
Press and adjust TUNE Control until
MONITOR Meter indicates least
deflection from left.
7. OUTPUT ATTENUATOR Control
Use as needed to establish Receiver
sensitivities.
8. RF OUT Connector
Connect to Receiver Antenna
Connector, or attach Antenna in
ramp operation.
9. TONE SELECT Switch
Select audio tone: 1020, 400, 1300
or 3000 Hz as desired; or MOD IN to
apply external modulation through
MOD IN/EXT FREQ CTR IN
Connector (bench testing only).
10. MOD IN/EXT FREQ CTR IN
Connector (TONE SELECT Switch
set to MOD IN)
Use to apply external modulation to
Signal Generator.
11. MASTER MOD LEVEL Control
Set to CAL for 30% each tone or
variable from 3% to 55%.
12. PWR/BAT Switch
PWR to use external ac line power
through the AC IN Connector.
BAT to initiate operation using
internal Battery power.
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