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Power Supply
Final Procedure

Calibration Procedure For Spectrum Analyzer An/Usm-489A Page Navigation
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TB 9-6625-2250-24
Figure 9. Power supply location sheet.
(5) Record dc voltage marked on A6A1 HV module (located at TI top).
(6) Note the value of inductor A6L401 (fig. 9). If A6L401 (fig. 9) is 10 mH, perform
(7) and (8) below. If A6L401 (fig. 9) is 20 mH, perform (7) and (9) below.
(7) Press TI LINE switch to ON.
NOTE
Perform (8) below ONLY if A6L401 (fig. 9) is 10 mH.
(8) If multimeter does not indicate a dc voltage equal to 2 V above the dc voltage
recorded in (5) above, perform b (1) below.
NOTE
Perform (9) below ONLY if A6L401 (fig. 9) is 20 mH.
(9) If multimeter does not indicate a dc voltage equal to the dc voltage recorded in
(5) above, perform b (2) below.
(10) Press TI LINE switch to OFF.
b. Adjustments
(1) Adjust A6R410 (fig. 9) for a dc voltage equal to 2 V above the dc voltage recorded
in (5) above (R).
(2) Adjust A6R410 (fig. 9) for a dc voltage equal to the dc voltage recorded in (5)
above (R).
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