Rev E TR-220 90 008 088-1
2-7
Locate the ANT GAIN menu by toggling the AUTO/MANUAL switch. Enter the
correct values that are affixed to the Directional Antenna (Figure 2-3) by using the
UP/FWD, DOWN/REV switch. Ensure you enter both values, 1030 MHz and 1090
MHz. Once completed, turn “OFF” the Test Set. The values will remain in the Test
Set memory. You will only need to reenter the values if the antenna is replaced or
repaired.
Directional Antenna Gain
Figure 2-3
4. When using the handheld or tripod method, connect the extender cable supplied with
the Test Set, ensuring to match the appropriate color-coded cables. Connect the
opposite ends of the ANTENNA SUM & DIFF connectors on the Test Set front
panel. If reversed, the Test Set will display a fault prompting the operator to check
their antenna connections.
5. Maintain a 10 to 170 ft. (3 to 50 meters) unobstructed path to the Aircraft Under Test
(AUT), and point the Directional antenna to the appropriate antenna on the AUT.
6. Turn the Test Set “ON” with the UUT FUNCTION switch in SETUP. Locate the T/S
Distance menu by toggling the AUTO switch and insert the approximate distance
measured from the Test Set to the AUT antenna by toggling the UP/FWD,
DOWN/REV switch. With out turning the Test Set OFF, turn the UUT FUNCTION
switch to the desired sequence of tests.
7. The optical sight will have a blinking LED indicating the operator must turn the
antenna slightly to gain a strong RF signal. A steady red LED signifies a good RF
signal and the Test Set will commence testing. The operator may also observe the
TURN indicator located on the display. By slowing turning the antenna, the TURN
indicator will spin slower until a lock is obtained. At that point, the Test Set will
display the appropriate display.
ANTENNA DATA
Gain @ 1030 Gain @ 1090
-XX dB -XX dB
T/S Distance: 170 ft
Chg: Up/Dn Cont:Auto
ANTENNA Connections
Missing or Reversed
Ant Gain 1030: +XXdB
Chg:Up/Dn Cont: AUTO
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