System Trouble Procedures

TB 11-5820-890-10-6

The following steps serve as a guide to the operation of the Lightweight Digital fAX with the RT-1523(C)/U or

RT-1439/VRC:

a . Load paper to be faxed.

b . Press MEMORY LOAD.

Checks

setup.

d. Press Establish contact.

e . Receiver presses RCV switch.

f . When tone is heard, sender presses RCV switch

g. When RCV light goes out, receiver presses RCV switch

h. On the TRT-1523(C)/U system, If the copy received is not good, or if working at exttending range

change the RT data rate to 1200

System Trouble Procedures. These steps will assist you in isolating fault system components when

you have a problem communicating in a not using data transmission. These Procedures assume that the net

and secure FH voice communcating has been established. IFyou are unable to communicate using data

transmission, do the following troubleshootng steps in the order provided:

CHECK LOCAL RADIO. Use the data on the FH voice net to determine that the radio net is operating

CHECK WITH OTHER NET MEMBERS. Do you have data communicatiion with some station s but

not others? The other stations may be out of range, temporarily off the air or has not cheched into the

net. If data communication can be established with another station, your system is probably OK and

the problem may be at the distant net station

CHECK SYSTEM CONFIGURATION. Verfy proper cabling, initialization and subscriber parameter

radio set and Lightweight DIGITAL fax switch setting etc.

NOTIFY MAINTENANCE. If the problem cannot be isolated, notify unit maintenance personnel and

inform your NCS of your communication problem.

8 . Remote Control Operations. The Remote Control Unit (RCU) C-11561 may be used in place of the RT IN a

SINCGAR radio system to allow the radio set and antenna to be placed at distances up to 4km from the local

system. Interoperabilility between the Lightweight Digital FAX and the RCU is the same when the Lightweight

Digital FAX is connected to an RT. Table 8-1. provides the switch setting s for the radio set and the RCU

remote control operation

RADlO SET

RCU

SWITCH

REM

SQ ON

FUNCTION

MODE

N/A

scowl-i

N/A

DATA

4800 (high speed)

1200 (extended range)

CoMSEC

OFF

N/A

Table 8-1. RCU Settings for Remote Operation