TB 9-6625-2057-24
CALIBRATION PROCESS FOR SIGNAL GENERATORS SG-543B/U, SG-543C/U,
AND HEWLETT-PACKARD, MODEL 204C
6. Preliminary Instructions
a. The instructions outlined in paragraphs 6 and 7 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 test 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 and TM 11-6625-1589-15-1
for this TI.
d. Unless otherwise specified, all controls and control settings refer to the TI.
7. Equipment Setup
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.
CAUTION
On models with rechargeable batteries do not apply 115 V ac to
TI if batteries are removed, otherwise damage will result.
NOTE
Connect a jumper cable between
and
(rear panel) ground
connectors.
a. Remove protective cover, as required, only to make adjustments and replace
immediately upon completion of adjustment.
b. Adjust AMPLITUDE control fully ccw.
c. Set 115/220 V switch (rear panel) to 115 V.
d. Connect TI to autotransformer.
e. Connect autotransformer to a 115 V ac source and adjust for 115 V ac output.
f. Set RANGE switch to X5 and allow 20 minutes for equipment to warm-up and stabilize.