TM 11-6625-3041-12/TO 33A1-8-908-1
1-13. DIFFERENCES BETWEEN MODELS
There is only one model of the Digital Data Generator SG-1139/G.
Service
Operating
Storage/Transport
Conditions
Temperature
-25 to +125F
-70 to +125F
Altitude
0 to 15,000 ft.
0 to 40,000 ft.
Power
104 to 127 volts ac, 48 to 420 Hz, single-phase, 50 watts maximum.
Pseudorandom with length of 215-1 bits (32,767 bits).
Pattern
Clock
Clock source is set by 3-position TIMING switch:
MASTER Position: Internal oscillator with accuracy of 10
including aging.
LOOPED Position:
Signal derived from input timing or input
diphase signals.
STA
CLK Position: External signal (station clock) applied to
STA
CLOCK Triax connector. Balanced square wave input of
100
mV to 6 V p-p. Logic 0 is -3 V to -50 mV, logic 1 is
+50
mV to +3 V. Input impedance is 100 ohms 10 percent.
SINGLE ERROR pushbutton injects one error each time it is
Error
pressed.
Injection