TB 9-6625-2247-40
Table 2. Minimum Specifications of Equipment Required - Continued
Manufacturer and model
Common name
Minimum use specifications
(part number)
VARIABLE ATTENUATOR
PRD, Model 157-F1
2
NO. 3
Accuracy: Calibration report from primary
(10519383)
Wiltron, Model 35WR42K
WAVEGUIDE TO COAXIAL
Insertion loss: 0.5 dB (maximum)
(13335442-1)
ADAPTER NO. 1
3
(WR42 TO K MALE)
Wiltron, Model 35WR28K
WAVEGUIDE TO COAXIAL
Insertion loss: 0.5 dB (maximum)
(13335442-3)
ADAPTER NO. 2
3
(WR28 TO k MALE)
1Part
of microwave standards kit, 18 to 26.5 GHz.
2
Part of microwave standards kit, 26.5 to 40 GHz.
3Part of microwave hardware kit, 18 to 40 GHz.
CALIBRATION PROCESS
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 text by common
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.
d. When indications specified in paragraphs 8 through 12 are not within tolerance,
perform the power supply check prior to making adjustments. After adjustments are made,
repeat paragraphs 8 through 12. Do not perform power supply check if all other
parameters are within tolerance.
e. Unless otherwise specified, all controls and control settings refer to the TI.
HIGH VOLTAGE is used or exposed during the performance of
personnel fail to observe safety precautions. REDUCE
OUTPUT(S) to minimum after each step within the
performance check where applicable.
NOTE
Remove protective cover from TI only to make adjustments.