SECTION III PRELIMINARY OPERATIONS

TB 11-6625-620-35-1

SECTION III

PRELIMINARY OPERATIONS

NOTE

It is recommended that personnel familiarize themselves with the entire procedure before

performing calibration.

b. Connect the other end of power cable to the 115

3-1. Precaution. Before individual test equipment

is connected into the calibration system, the

or 230 volt source required for proper operation, ob-

serving POWER switch position.

following precautions should be taken to prevent

damage to equipment.

CAUTION

3-2. Test Instrument Controls. a. Set BAUDS

RATE switch to 75 BAUDS.

Make certain that the power cable is not

connected to 230 volts ac when the power

b. Set MESSAGE SELECT switch to DOT CY.

switch locking guard device indicated the

c. Loosen % DISTORT LOCK.

d. Turn % DISTORT to O.

power toggle switch to be into the 115 volt

e. Set DISTORT SELECT to BIAS SPACE.

position.

a. Connect power cable to the Test Instrument con-

f. Disregard all other switch positions.

nection AC POWER.

g. Allow 5 minutes for equipment warmup.

SECTION IV

CALIBRATION PROCESS

4-1. Baud Bate Frequency Test. a. Performance

{1) Connect the Test Instrument as shown in

Check.

Figure 1. Teletypewriter Test Set TS-799/UGM-1, distortion and baud rate test equipment setup.