TB 9-6625-2094-35
NOTE
Calibrate measuring receiver for sensor zero and power level
cal.
(2) Connect measuring receiver sensor module to TI RF OUTPUT and press
LOG/LIN (dBm) pushbutton.
(3) Position controls as listed in (a) through (e) below:
(a) FREQUENCY VERNIER control to CAL.
(b) Set FREQUENCY switches to indicate 050.000 MHz.
(c) MODULATION MODE switch to CW.
(d) OUTPUT VERNIER control for a -1 dB indication on OUTPUT meter.
(e) OUTPUT step attenuator control to +10 dBm.
(4) If measuring receiver does not indicate between 8.5 and 9.5 dB, perform b below.
(5) Repeat technique of (4) above for TI settings and indications listed in table 4. If
measuring receiver does not indicate within specified limits, perform b below.
Test Instrument
Power meter (dBm)
OUTPUT step attenuator
OUTPUT meter
settings (dBm)
settings
Min
Max
0
+3
+2.5
+3.5
0
0
-0.5
+0.5
0
-3
-2.5
-3.5
0
-5
-4.5
-5.5
0
-7
-6.5
-7.5
-10
+3
-6.5
-7.5
b. Adjustments
(1) Temporarily disconnect measuring receiver sensor module from TI.
(2) Set OUTPUT VERNIER control fully ccw and adjust meter board POT B (fig.
2) until meter needle bisects dot at left end of meter scale (R).
(3) Adjust OUTPUT VERNIER control fully cw and adjust meter board POT A (fig.
2) for a +3-dBm OUTPUT meter reading (R).
(4) Set OUTPUT step attenuator to +10 dBm.
(5) Connect measuring receiver sensor module to TI RF OUTPUT.
(6) Alternately adjust OUTPUT VERNIER control for a 0 and -7 dBm reading on
TI OUTPUT meter while adjusting meter board POT F (fig. 2) for +10 dBm and POT E (fig.
2) for +3 dBm indications on the measuring receiver. Repeat the above until no further
adjustments are required (R).
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