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4.9.11 Press the TI MODE, as necessary, for the COMM UHF mode screen.
4.9.12 Repeat steps 4.9.3 through 4.9.10 at 250 MHz.
4.9.13 Repeat steps 4.9.3 through 4.9.10 at 400 MHz.
4.9.14 Set the Signal Generator to minimum and disconnect test setup.
4.10 AM METER CALIBRATION:
4.10.1 Repeat step 3.6 to restore the TI factory presets.
4.10.2 Press the TI SETUP key, as necessary to display the SETUP menu, and press NEXT PARAM, as necessary,
to select the PORT field and set to ANT. Press MODE, as necessary, for the COMM UHF mode screen.
4.10.3 Connect the Signal Generator output to a BNC Tee. Connect one leg of the BNC Tee to the TI ANT and the
other leg to the Measuring Receiver INPUT 50 Ω.
4.10.4 Press the Measuring Receiver INSTR PRESET. Adjust the Signal Generator frequency for a 400 MHz
indication on the Measuring Receiver. Press the Measuring Receiver AM key and set HP Filter to 300 Hz and LP
Filter to 3 kHz.
4.10.5 Press the TI FREQ and set FREQ to 400.000 MHz.
4.10.6 Set the Signal Generator MODULATION AM to ON and the audio frequency to 1 kHz.
4.10.7 Set the Signal Generator AM modulation level, as required, for a Measuring Receiver indication of the first
value listed in the Applied column of Table 16.
4.10.8 Verify the TI TX MOD = modulation indication is within the values listed in the appropriate Limits column
of Table 16.
4.10.9 Repeat steps 4.10.7 and 4.10.8 for the remaining corresponding values listed in Table 16.
4.10.10 Set outputs to minimum.
Applied (%)
30.0
50.0
90.0
Table 16.
T.O. 33K3-4-3457-1
Limits (%)
27 to 33
45 to 55
81 to 99
23
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