SECTION II. EQUIPMENT REQUIREMENTS

SECTION III. CALIBRATION PROCESS

Calibration Procedure For Attenuators, Fixed And Variable (10 Mhz To 26.5 Mhz) (General) Page Navigation
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TB 9-4931-523-24

SECTION I

IDENTIFICATION AND DESCRIPTION

1. Test Instrument Identification. This procedure provides instructions for the

calibration of Attenuators, Fixed and Variable (10 MHz to 26.5 GHz) (General). The

manufacturers' manuals were used as the prime data sources in compiling these

instructions. The equipment being calibrated will be referred to as the TI (test instrument)

throughout this bulletin.

a. Model Variations. Variations among models are described in appendix A.

b. Time and Technique. The time required for this calibration is approximately 2

hours using the dc and low frequency technique.

2. Forms, Records, and Reports. Forms, records, and reports required for calibration

personnel at all levels are prescribed by TB 750-25.

3. Calibration Description. TI parameters and performance specifications that pertain

to this calibration are listed in appendix A. TIs other than those listed in the appendix may

be checked using the techniques in this TB if the manufacturers' specifications are

available.

SECTION II

EQUIPMENT REQUIREMENTS

4. Equipment Required. Table 1 identifies the specific equipment to be used in this

calibration procedure. This equipment is issued with Secondary Transfer Calibration

Standards Set, AN/GSM-286; AN/GSM-287; or AN/GSM-440 and Secondary Reference

Calibration Standards Set, NSN 4931-00-621-7878. Alternate items may be used by the

calibrating activity. 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 1. The accuracies listed in table 1 provide a four-

to-one ratio between the standard and TI. Appendix A is footnoted where the four-to-one

ratio may not be met.

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.

Table 1. Minimum Specifications of Equipment Required.

Manufacturer and model

Common name

Minimum use specifications

(part number)

MEASURING RECEIVER

Frequency measurement:

Measuring receiver system N5531S

Range: 10 MHz to 26.5 GHz

consisting of: Spectrum Analyzer,

Agilent Model E4440A (E4440A), Power

Accuracy: 0.5%

meter, Agilent Model E4419B (E4419B),

Power measurement:

or Power meter, Agilent Model N1911A

Frequency: 250 kHz to 26.5 MHz

(N1911A) and Sensor modules, Agilent

Range: +10 dB to -113 dB

Model N5532A opt. 504 (504), 518 (518),

Accuracy: 0.125 dB

526 (526)

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