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Generator sg -1139/g
1-10. EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES
The Digital Data Generator SG-1139/G tests digital paths
including separate equipments, cables, transmitters and
receivers, and complete systems.
Compatible with ATACS and TRI-TAC systems.
Includes transmitter and receiver with built-in clock.
Powered from standard 115-volt ac line.
Accessories supplied in cover.
Checks unbalanced NRZ, balanced NRZ, and diphase paths.
Measures total errors and bit error rate.
Operates from internal clock, external clock, or clock
Automatic, continuous evaluation of bit error rate.
Simple operation with minimal hazard to personnel or equip-
Rapid access to assemblies for ease of repair.
104 to 127 volts ac, 48 to 420 Hz, single-phase, 50 watts maximum.
Pseudorandom with length of 215-1 bits (32,767 bits).
Clock source is set by 3-position TIMING switch:
MASTER Position: Internal oscillator with accuracy of 10
parts per million, over full operating temperature range
Signal derived from input timing or input
CLK Position: External signal (station clock) applied to
CLOCK Triax connector. Balanced square wave input of
mV to 6 V p-p. Logic 0 is -3 V to -50 mV, logic 1 is
mV to +3 V. Input impedance is 100 ohms ±10 percent.
SINGLE ERROR pushbutton injects one error each time it is
