TB 9-6625-2278-24
to-one ratio between the standard and TI. Where the four-to-one ratio cannot be met, the
four-to-one accuracy will be listed, and 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 this
calibration procedure. The following peculiar accessory is also required for this calibration:
Power Sensor Cable, Hewlett-Packard, Model 11730A (supplied with TI).
Table 2. Minimum specifications of Equipment Required
Common name
Manufacturer and model
(official nomenclature)
Minimum use specifications
(part number)
MICROWAVE
Frequency range: 49.5 to 50.5 MHz
Anritsu, Model MF2414B003
FREQUENCY COUNTER
Accuracy: 0.25%
(MF2414B003)
Voltage range: -15.05 to 15.75 V dc
Hewlett-Packard, Model
3458A (3458A)
Accuracy: 0.08%
A
Ability to measure approximates 200
bility to measure V dc
POWER METER
Power range: 0.988 to 1.012 mW
Hewlett-Packard, Model E12-
432A (MIS-30525)
Frequency range: 50 MHz
w/thermistor mount Hewlett-
Power accuracy: 0.3% (0.7%)
Packard, Model 478A-H75
(7915907) or 8478B (8478B)
Must have VCOMP and VRF Outputs
Power range: 3.13 W to 101.0 mW
Hewlett-Packard, Model
RANGE CALIBRATOR
11683A (11683A)
Accuracy: 0.125% ( 0.25%)
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
name as listed in table 2.
c. Unless otherwise specified, verify the results 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 manual for this TI.
d. When indications specified in paragraphs 8 through 11 are not within tolerance,
perform the power supply check prior to making adjustments. After adjustments are made,
repeat paragraphs 8 through 11. 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.
