OPERATION MANUAL
IFF-701Ti
1-2-3
Page 4
Jul 1/00
3.10 VOR OPERATION
(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%
modulation of each VOR modulating
tone.
BRG to verify operation of bearing
signal at 90
° (internally).
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
VOR FIXED is mandatory in ramp
operation and is used on bench for a
fixed channel center frequency.
VOR VAR to check all channel bench
operation. Set VAR FREQ Controls
to select the desired channel in
25 kHz steps.
4. TUNE Control
Adjust until TUNE Indicator stops
illuminating, indicating Signal
Generator is in the fine tune range.
5. FINE TUNE Switch
Press and adjust TUNE Control until
MONITOR Meter indicates least
deflection from left.
6. OUTPUT ATTENUATOR Control
Use as needed to establish Receiver
sensitivities.
7. RF OUT Connector
Connect to Receiver Antenna
Connector, or attach Antenna in
ramp operation.
STEP PROCEDURE
8. TONE SELECT Switch
Select desired tone: 1020 (Ident
tone), 400, 1300 or 3000 Hz.
9. 30 Hz VAR LEVEL Control
Vary the 30 Hz modulation level from
0% to 30%.
10. 9.96 kHz REF LEVEL Control
Vary the 9.96 kHz modulation level
from 0% to 30%.
11. MASTER MOD LEVEL Control
Set to CAL for 30% for each VOR
tone or variable from 3% to 55% for
each VOR tone.
12. PWR/BAT Switch
PWR to use external ac line power
through the AC IN Connector.
BAT to initiate operation using
internal Battery.
13. VOR BRG SELECT Switches
Set to desired bearing for radial
testing and alignment.
14. VOR BRG TO/FROM Switch
Set to obtain reciprocals of selected
bearings for Indicator flag tests.
15. CRYSTAL HI/LO Switch
(FREQUENCY MODE Switch set to
VOR FIXED)
HI for 112.8 MHz RF output.
LO for 108 MHz RF output.
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