Section III. OPERATION

TM 11-5895-833-12/NAVELEX 0967-LP-550-1010/TO 31R5-2TSC54-91

o. Reconnect cable to REFERENCE FREQUENCY

s. Connect a test cable between 70 MHz SAMPLE

SYNTH IN connector J2 (n above) and observe that RF

and RF POWER METER INPUT connectors and

LEVEL, RF LO FAULT and IF LO FAULT INDICATOR

observe that RF POWER meter reads -10 dbm +3 db.

t. Perform the procedures outlined in f, g, h, j, 1, m, n

lamps extinguish and that audible alarm deactivates.

p. Momentarily disconnect associated frequency

and o above.

u. Repeat the procedures outlined in v, f, g, h, j, 1, m,

synthesizer (associated with down-converter under test)

cable from REFERENCE FREQUENCY SYNTH IN

n, and o above until all remaining down-converters have

connector J2. Observe that down-converter RF LO

been tested.

v. Disconnect up-converter test cable from up-

FAULT and IF LO INDICATOR lamps illuminate and that

audible alarm activates.

converter RF TEST OUTPUT J2 and connect the test

q. Reconnect cable to REFERENCE FREQUENCY

cable to RF TEST OUTPUT connector J2 on the next

SYNTH IN connector J2 (p above) and observe that RF

up-converter to be tested.

w. Perform the procedures outlined in f, g, h, ;, 1, m, n,

LO FAULT and IF LO FAULT INDICATOR lamps

extinguish and that audible alarm deactivates.

and o above.

r. Disconnect test cable from down-converter RF

x. Repeat the procedures outlined in v, f, g, h, ;, 1, m,

TEST INPUT connector and connect the test cable to RF

n, and o above until all remaining up-converters have

TEST INPUT connector on the next down-converter to

been tested.

tested.

Section III. OPERATION

3-8. Starting Procedure

3-7. General Operating Instructions

The following procedure is based on the assumption that

a. The frequency conversion subsystem should be

the 7.25- to 7.75-GHz rf and 70-MHz if. and/or 700-MHz

operated in accordance with the standard operating

if. input signals required by the frequency conversion

procedures

established

the

AN/TSC-54

subsystem are available at the communications site.

communications site. Refer to the appropriate instruction

a. Apply power to blowers.

manuals (app A) for detailed information on the

application of equipment. Detailed operational data for

CAUTION

the equipment is given in paragraphs 3-8 through 3-12.

b. Communication channels can be established

To avoid damage caused by equipment

over-heating, always insure that blower

following power application and preliminary set-up of

circuit is ON when the frequency con-

operating controls (para 3-9) and normal operation can

version subsystem is in operation.

be executed following acquisition of the scheduled

communications satellite. Optional types of operation

and equipment substitutions can be accomplished by the

NOTE

use of various cable arrangements on equipment.

Observe that BLOWER FAILURE indi-cator

c. Immediate reporting of jamming, plus accurate and

lamps on the blower assembly located at

complete recording of any distortion, is an important

top of each equipment cabinet is not

responsibility of operating personnel. The initial reporting

illuminated. The BLOWER FAILURE

of unusual interference alerts command that

indicator lamps should extinguish when

countermeasures are being used; detailed records

proper airflow is achieved.

b. Set down-converter POWER ON-OFF circuit

inform

the

higher

authorities

regarding

the

countermeasures capability of the enemy. Follow the

breakers to OFF.

standard instructions given in the local operating

c. Set frequency synthesizer unit POWER ON-OFF

procedures for reporting and recording evidence of

toggle switch to OFF.

enemy

countermeasures

efforts.

d. Set test translator POWER ON-OFF circuit breaker

to OFF.

Change 1 3-17