NSN: 6625-01-069-0955; NOUN: Teletypewriter Test Set:
The Test Set consists of two major components: a Teletypewriter Test Set, TS-3856/GGM21A and a Pulse Generator SG-1186/GGM21A.
- The Pulse Generator SG-1186/GGM21A provides nine messages:
- Message A: 128-character test (1024 bits) message in American Standard for Information Interchange (ASCII).
- Message B: 128-character test (640 bits) message in International Telegraph No. 2, American Variation Code.
- Continuous space.
- 1:1 Reversals.
- Continuous Mark.
- Selected Character Message.
- 32K Pseudo-random Test Pattern.
- 2K Pseudo-random Test Pattern.
- User Defined Program
The Generator has 8192 bits of programmable memory.
Telegraph distortion can be added to the output data signals in increments of 1% from 0 to 49% of the data unit interval at Baud rates lower than 9999. At 10,000 or greater Bauds, the distortion can be added in increments of 10% from 0 to 40% of data unit interval. Baud rate is from 30.00 to 99,990.
Teletypewriter Test Set TS-3856/GGM21A performs four major functions. Average and Peak distortion monitoring/counting, Bit Error Rate determination with the ability to count errors and memory programming.