TB 9-5985-317-40
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification. This procedure provides instructions for the
calibration of Attenuator, Agilent, Model 11708A. 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. Some models are Hewlett-Packard and others are Agilent.
b. Time and Technique. The time required for this calibration is approximately 1
hour 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 applications which pertain
Table 1. Calibration Description.
Test instrument parameters
Performance specifications
Range 30 db
Accuracy: 0.05 db @ 50 MHz
SWR: <1.05 @ 50 MHz
EQUIPMENT REQUIREMENTS
4. Equipment Required. Table 1 identifies the specific equipment to be used in this
calibration procedure. This equipment is issued with Secondary Reference Calibration
Standards Set, NSN 4931-00-621-7878. Alternate items may be used by the calibrating
activity. The item 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. 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.
Table 2. Minimum Specifications of Equipment Required.
Manufacturer and model
Common name
Minimum use specifications
(part number)
Network Analyzer
E8364C with E-Cal module N4690-
10 MHz to 50 GHz
60004 and 85055A Verification Kit
45 MHz to 2 GHz 0.001
2 to 20 GHz 0.008
20 to 40 GHz 0.020
40 to 50 GHz 0.020