TB 9-6625-2000-24
one ratio between the standard and TI. Where the four-to-one ratio cannot be met, the actual
accuracy of the equipment selected is shown in parenthesis.
5. Accessories Required. The accessories required for this calibration are common usage
accessories, issued as indicated in paragraph 4 above and are not listed in the calibration
procedure. The following peculiar accessory is also required for this calibration:
SEMICONDUCTOR DEVICE (Coaxial Crystal Detector) Hewlett-Packard, Model 423AOPT03
(423AOPT03).
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
ATTENUATOR
Range: DC to 18 GHz
Weinschel, Model 9918-10dB (9918)
Accuracy:
r 0.5dB
AUTOTRANSFORMER
Range: 105 to 125 V ac
Ridge, Model 9020A (9020A)
W10MT3AS3
Accuracy:
r1%
MEASURING RECEIVER
Frequency measurement:
Measuring receiver system N5531S
Range: 10 MHz to 26.5 GHz
consisting of: Spectrum Analyzer
Agilent, Model E4440A (E4440A),
Accuracy:
r0.5%
Power meter Agilent, Model E4419B
(E4419B), and Sensor module Agilent,
Frequency: 250 kHz to 26.5 MHz
Model 518 (518)
Range: +10 dB to -113 dB
Accuracy:
r0.125 dB
MICROWAVE
Range: 6.5 to 11.5 GHz
Anritsu, Model MF2414B003
FREQUENCY COUNTER
(MF2414B003)
Accuracy:
r 0.125%
Range: -1850 to +10 V dc
Fluke, Model 8840A/AF05
(AN/GSM-64D)
Accuracy:
r0.5%
Range: 0 to 15 V pk 800 to 1200 Hz
(OS303/G)
Accuracy:
r3%
CALIBRATION PROCESS
6. Preliminary Instructions
a. The instructions outlined in this section 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 11-6625-2948-14&P.
d. When indications specified in paragraphs 8 through 13 are not within tolerance,
perform the power supply check prior to making adjustments. After adjustments are made,
repeat paragraphs 8 through 13. Do not perform power supply check if all other parameters
are within tolerance.