TB 9-6625-2181-24
DB LOSS switches back to horizontal position.
(6) Set all TI 600
(7) Adjust calibrator frequency to 100 kHz and amplitude for a 10.00 V. Note and
record indication on true rms voltmeter.
(8) Set 60 DB LOSS switch to 1. Adjust calibrator output until true rms
voltmeter indicates reading recorded in (6) above. Calibrator will indicate between 8.6099 and
9.2257 V ac.
(9) Repeat technique of (7) above for switch settings listed in table 4.
Table 4. Attenuator Accuracy 100 kHz
Calibrator output indications
Test instrument
(V ac)
600 DB LOSS
switch settings
Min
Max
2
7.6736
8.2224
3
6.8391
7.3282
5
5.4325
5.8210
10
3.0549
3.2734
20
0.9660
1.0351
40
0.09660
0.1035
b. Adjustments. No adjustments can be made.
9. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.
CALIBRATION PROCESS FOR
CN-1000/G, HEWLETT-PACKARD, MODEL 350D, AND
NDL, MODEL CO-710
10. Preliminary Instructions
a. The instructions outlined in paragraphs 10 and 11 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 for this TI.
d. Unless otherwise specified, all controls and control settings refer to the TI.