TB 9-6625-781-24
Table 1. Calibration Description Continued
Test instrument
Performance
parameters
specifications
Time base:
Model 5245L
Model 5245M
5 MHz
Aging rate stability: < 3 parts in 109 / 24 hrs
Model 5245L
< 5 parts in 1010 / 24 hrs
Model 5245M
Model 5262A
1 s to 108 s
Range
Accuracy
1 period of standard frequency counted time base
accuracy
Sensitivity
0.3 V p-p minimum, direct coupled input
This specification is for information only and is not verified in this bulletin.
1
EQUIPMENT REQUIREMENTS
4. Equipment Required. Table 2 identifies the specific equipment to be used in this
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-287 and AN/GSM-705. Alternate items may be used by the
calibrating activity when the equipment listed in table 2 is not available. The items
selected must be verified to perform satisfactorily prior to use and must bear evidence of
current calibration. The equipment must meet or exceed the minimum use specifications
listed in table 2. The accuracies listed in table 2 provide a four-to-one ratio between the
standard and TI.
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:
extender cable, Hewlett-Packard, model 10506 (7913217).
Table 2. Minimum Specifications of Equipment Required
Minimum use
Manufacturer and model
Common name
specifications
(part number)
Range: 105 to 125 V ac
Ridge, Model 9020A
Accuracy: 1%
(9020A)
ELECTRONIC COUNTER Accuracy: 1 count time base
Hewlett-Packard, Model 5245L or
accuracy
5245M
FREQUENCY
Range: 1 to 5 MHz
Tracor, Model 527E (527E)
DIFFERENCE METER
Accuracy: 5%
Resolution: 5 parts in 1010
FUNCTION/ARBITRARY
Range: 10 Hz to 10 MHz
Agilent, Model 33250A
(33250A)
Range: 0 mV to 187 V
Agilent, Model 3458A
Accuracy: 1%
(3458A)
Range: 150 to 300 mV p-p
Agilent, OS-303/G
Accuracy: 3%
(OS-303/G)