TB 9-6625-2057-24
(5) Set NORM/LOW DIST switch to LOW DIST.
(6) Repeat technique of (2) and (3) above using RANGE switch and frequency dial
settings listed in table 5. Audio analyzer will indicate within limits specified.
b. Adjustments
(1) Set RANGE switch to X1K and frequency dial to 10.
(2) Adjust R30 (fig. 2) for minimum distortion as indicated on audio analyzer (R).
(3) Repeat a (2) through (6) above.
12. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.
CALIBRATION PROCESS FOR SIGNAL GENERATORS SG-543/U
AND HEWLETT-PACKARD, MODEL 204B
13. Preliminary Instructions
a. The instructions outlined in paragraphs 13 and 14 are preparatory to the calibration
process. Personnel should become familiar with the entire bulletin before beginning the
calibration.
b. Items of equipment used in this procedure are referenced within the text by common
name as listed in table 2.
c. Unless otherwise specified, verify the result of each test and, whenever the test
requirement is not met, take corrective action before continuing with the calibration.
Adjustments required to calibrate the TI are included in this procedure. Additional
maintenance information is contained in the manufacturers' manuals.
d. Unless otherwise specified, all controls and control settings refer to the TI.
14. Equipment Setup
WARNING
HIGH VOLTAGE is used or exposed during the performance of
this calibration.
DEATH ON CONTACT may result if
personnel fail to observe safety precautions. REDUCE
OUTPUT(S) to minimum after each step within the
performance check where applicable.
a. Remove TI protective cover as required for adjustment.
