TB 9-6625-2291-24
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification. This bulletin provides instructions for calibration of
the Optical Attenuation Test Set, TS-4335/G. The manufacturer's manual and TM
11-6625-3252-12&P 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. None
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
a. Forms, records, and reports required for calibration personnel at all levels are
prescribed by TB 750-25.
b. Adjustments to be reported are designated (R) at the end of the sentence in which
they appear. Report only those adjustments made and designated with (R).
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Table 1. Calibration Description
Test instrument parameters
Performance specifications
Transmit
Range: >32 dBm
Reference level
Range: -0 to -60 dBm
Accuracy:
0.5 dBm at -20 dBm/ 25 C
Linearity:
0.09 dBm
Range: 0 to -55 dBm1
Attenuation mode
Accuracy:
0.2 dBm
1Not
tested above -10 and below -50 dBm.
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Standards Set
AN/GSM-287 or AN/GSM-705. 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
between the standard and the TI. Where the four to one ratio cannot be met, the four-to-
one accuracy of the equipment selected is shown in parenthesis.
