SECTION III CALIBRATION PROCESS

TB 9-4920-358-35

SECTION III

CALIBRATION PROCESS

6. Preliminary Instructions

a. The instructions outlined in paragraphs 6 and 7 are preparatory to the calibration

process. Personnel should become familiar with the entire bulletin before beginning the

calibration.

b. Items of equipment used in this procedure are referenced within the text by common

name as listed in table 2.

c. Unless otherwise specified, verify the result of each test and, whenever the test

requirement is not met, take corrective action before continuing with the calibration.

Adjustments required to calibrate the TI are included in this procedure. Additional

maintenance information is contained in the manufacturer's manual for this TI.

d. When indications specified in paragraphs 8 through 17 are not within tolerance,

perform the power supply check prior to making adjustments. After adjustments are made,

repeat paragraphs 8 through 17. Do not perform power supply checks if all other

parameters are within tolerance.

e. Unless otherwise specified, all control and control settings refer to the TI.

7. Equipment Setup

HIGH VOLTAGE is used or exposed during the performance of

this calibration.

DEATH ON CONTACT may result if

personnel fail to observe safety precautions.

REDUCE

OUTPUT(S) to minimum after each step within the

performance check where applicable.

NOTE

Do not operate TI with ANTENNA unloaded. When required,

use a 50 Ω termination; do not use a feedthrough.

a. Remove front panel and chassis assembly from case.

b. Set TI switches as listed in (1) through (4) below.

(1) MODE switch to 2.

(2) REFERENCE CODE switches to 7700.

(3) FUNCTION switch to SYSTEM.

(4) SYSTEM TYPE switch to SINGLE CHANNEL.

c. Connect 115 V ac or 28 V dc power source to TI and set appropriate POWER

switch to ON.

d. Allow 30 second warm up, then set TEST switch to ON. REJECT lamp will light.