TB 9-6625-1967-24
NOTE
Leave common lead connected to TP6332 (GND) (fig. 5)
throughout this performance check.
multimeter does not indicate within limits specified, perform adjustment listed in table 4.
b. Adjustments. Adjust R6358 (HV) (fig. 5) for a 25-V dc indication on multimeter (R).
Table 4. Low-Voltage Power Supply
Multimeter indications
Test instrument
Adjustments
(V dc)
test points
Min
Max
TP6411 (+10)
+9.9
+10.1
R6514 (+10 ADJ) (R)
TP6227 (+5)
+4.75
+5.25
---
TP6218 (-5)
-4.75
-5.25
---
P66 (PIN 6) +100V
+90
+110
---
P66 (PIN 7) +165V
+155
+175
---
15. Final Procedure
a. Deenergize and disconnect all equipment and reinstall protective cover on TI.
b. Annotate and affix DA label/form in accordance with TB 750-25.
CALIBRATION PROCESS FOR TIME DOMAIN REFLECTOMETER TEKTRONIX
TYPES 1502 AND 1502 OPTION 4
16. Preliminary Instructions
a. The instructions outlined in paragraphs 16 and 17 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 manufacturer's manual for this TI and
TM 9-4935-601-14-3&P.
d. When indications specified in paragraphs 18 through 21 are not within tolerance,
perform the power supply check prior to making adjustments. After adjustments are made,
