TM 11-6625-3041-12/TO 33A1-8-908-1
2-13. EMERGENCY PROCEDURES
The SG-1139 consists of two sections, a transmitter and a
Loss of
Transmitter
receiver. Except for the power supplies and the clock
circuits, these two sections are independent. One will
or Receiver
Function
function without the other.
If either section malfunctions, it can be used for testing
with another SG-1139 in which the opposite section is
operating properly (except a transmitter fault will inhibit
the BER indicators).
q The
SG-1139 operates at one of three data-rate families:
Loss of
Data-Rate
Family
576 . . . . . . . . . . . . . . . . Unbalanced NRZ
.6-32 . . . . . . . . . . . . . Diphase
128-4608 . . . . . . . . . . . Balanced NRZ
q In
many cases, a malfunction in one or even two families
will not affect the other(s). Testing can proceed normally
with the family that is operating properly.
Emergency
Set POWER to OFF on front panel of SG-1139.
Turn Off
If POWER lamp does not extinguish, either open appropriate
shelter circuit breaker or disconnect power cable from
115-volt power source.