TB 9-6625-164-24
Table 3. Transmitter Frequency.
TI
Frequency Counter Limits (Hz)
TX FREQ (Hz) Fixed
Minimum
Maximum
404
403.96
404.04
1004
1003.90
1004.10
2804
2803.72
2804.28
3804
3803.62
3804.38
2713
2712.73
2713.27
(7) Set TI TX FREQ (HZ) fixed controls for 404 Hz.
(8) Set TI TX LEVEL (dBm) fixed controls to +6.0 dBm.
(9) The Multimeter must indicate within 1.45907 to 1.63710 V rms. Set the TI TX
LEVEL (dBm) fixed controls to the remaining values listed in the TI TX LEVEL (dBm)
fixed column of Table 4.
(10) The Multimeter must indicate within the limits listed in table 4.
Table 4 Transmitter Level
TI
Multimeter Limits (V rms)
TX LEVEL (dBm) Fixed
Minimum
Maximum
+6
1.45907
1.63710
+3
1.03294
1.15898
0
0.73127
0.82049
-7
0.32664
0.36650
-13
0.16371
0.18369
(11) Set TI TX LEVEL (dBm) fixed controls for minimum output and disconnect test
setup.
b. Adjustments. No adjustments can be made.
9. Receiver Level and Frequency
a. Performance Check
(1) Set TI controls as follows:
(a) TX MODE
QUIET
(b) Z RX TERM/BRDG
TERM
600Ω
(c) Z TX/RX
(d) SELECT
dBm (Indicator lit)
(e) RX NOTCH/NONE
NONE
(f) RX CMSG/3 kHz FLAT/NONE
NONE
(2) Connect TI RX input to Calibrator output.
(3) Adjust Calibrator for a frequency of 1 kHz and output amplitude listed in the
first line of table 5 below. Set the Calibrator OPR/STBY to OPR.
(4) Use the Calibrator EDIT controls and adjust the output levels until the TI RX
LEVELS (dBm) indicates the first value listed in the RX LEVEL (dBm) column of table 5.
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