TB 9-4931-495-24
(9) Decrease POWER LEVEL control 10 dB as indicated on power meter
microwave frequency counter will not change more than 200 kHz for BAND 1, 400 kHz
for BAND 2 and 600 kHz for BANDS 3 and 4.
b. Adjustments
2.0 GHz, and BAND 1 HI A3R3 (fig. 5) for 6.2 GHz (R).
6.0 GHz, and BAND 2 HI A3R7 (fig. 5) for 12.4 GHz (R).
12.0 GHz, and BAND 3 HI A3R25 (fig. 5) for 18.0 GHz (R).
22. Sweep Frequency (Model 86290A)
a. Performance Check
(1) Connect TI RF OUT to microwave frequency counter.
(2) Adjust POWER LEVEL control to 12 o'clock position, set BAND switch to
BAND 1, press CW pushbutton, and adjust CW MARKER control for microwave frequency
counter indication of 2 GHz.
(3) Press FULL SWEEP (START) pushbutton and set MODE switch to AUTO.
(5) Repeat (1) through (4) above for the band and frequencies shown in table 6.
Table 6. Swept Frequency Endpoint and Marker Accuracy
Test instrument
Frequency counter indications (GHz)
Band
Frequency (GHz)
Min
Max
1
2.0
1.970
2.030
1
6.2
6.170
6.230
2
6.0
5.970
6.030
2
12.4
12.370
12.430
3
12.4
12.370
12.430
3
18.0
17.970
18.030
(6) Set BAND switch to BAND 1, press CW pushbutton and adjust CW MARKER
control for microwave frequency counter indication between 4.098 and 4.102 GHz.
(7) Set START MARKER pointer to 3 GHz and STOP MARKER pointer to
5 GHz.
(8) Press MARKER SWEEP pushbutton and set MARKERS switch to AMPL.
