TM 11-6625-3041-12/TO 33A1-8-908-1
FRONT PANEL CONTROLS, INDICATORS, AND CONNECTORS (cont)
2-1.
Name
Type
Function
BNC connector
Provides connection for unbalanced timing
UNBALANCED
TMG OUT
output signal required with UNBALANCED
DATA OUT signals.
Provides connection for balanced condi-
Double banana
DIPHASE
tioned diphase data output signal available
jack/binding
OUT
with DATA-RATE family of .6-32 kb/s. Con-
post
nectors accept banana plugs, field wire, or
BNC banana adapters supplied.
Provides connection for balanced condi-
Double banana
DIPHASE
tioned diphase data input signal used with
jack/binding
IN
post
DATARATE family of .6-32 kb/s. Connectors
accept banana plugs, field wire, or BNC
banana adapters supplied.
Selects source of signal that initiates
3-position rotary
TIMING
action of the SG-1139 as follows:
switch
MASTER Position: Action is initiated by an
set by the DATA RATE control.
LOOPED Position: Action is initiated by a
signal derived from the signals applied to
the UNBALANCED TMG IN, DIPHASE IN, or
BALANCED TMG IN, depending on the DATA-RATE
family selected.
STA CLK Position: Action is initiated by
an external signal, such as station clock,
applied to the STA CLK input.
Selects rate at which both receiver
21-position rotary
DATA RATE
switch
(kb/s)
There are 20 different rates, divided
into three families (576 kb/s is common
to two families).
Data and timing inputs and outputs are
allowed to operate for only one family at
a time, the inputs and outputs for the
unused families are not allowed to operate.
The data rate also determines the time
required for the BER measurements.
When pushed, inserts a single error into
SINGLE
Pushbutton switch
data output signal.
ERROR
2-5