TB 9-6625-2309-24
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification. This bulletin provides instructions for calibration of
the Optical Fiber Test Set TS-4320(P)/G. Purchase/Description CR-PD-8018-001, dated 16
October 1989, TM 11-6625-3271-12, and TM 11-6625-3271-40 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 5
hours, 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. When adjustments are in tables, the (R) follows the designated adjustment.
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.
1
Performance specifications
Test instrument parameter
Horizontal scale error
Range: 0 to 65 km
Accuracy2: 1 m (3 x 10-5) x distance
Range: 65 to 120 km
Accuracy: 10 m (3 x 10-5) x distance
Range: 0 to 5 dB
Accuracy: 0.5 dB over entire dynamic range
1
Optical modules TD-260C, TD-261C, and TD-285C.
2Accuracy
includes data point sampling error of 0.5 m.
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, 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 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.