Section IV. OPERATION UNDER UNUSUAL CONDITIONS

TM 11-5895-1179-13 EE132-EA-OMP-010/E106 KY883 TO 31S1-2GSC-161

Section IV. OPERATION UNDER UNUSUAL CONDITIONS

2-9.

Mode B (Stressed Mode)

When you are operating in a satellite communications link that is being pulse jammed, set the controls on your encoder-

decoder as shown in table 2-9. If your encoder-decoder is located at the transmit end 4. of the communications link, the

ENCODER MODE select switch should be set to the B position. If your encoder-decoder is located at the receive end of

the communications link, the DECODER MODE select switch should be set to the B position. If you are transmitting and

receiving information, both the ENCODER MODE select switch and the DECODER MODE select switch should be set to

the B position. For proper operation, the encoder-decoder at the transmit end of the communications link must have the

ENCODER MODE select switch set to the B position and the encoder-decoder at the receive end of the communications

link must have the DECODER MODE select switch set to the B position.

Table 2-9. Mode B Switch Settings

Required

Switch

Setting

Indicator

Indication

FUNCTION select

ON LINE

ENCODER MODE

select

DECODER MODE

select

ON/OFF

POWER

ON LINE FAULT

Off*

INDICATORS (all)

SYNC

CHANNEL (x103)

OUTPUT (x10- 5)

Off

ERROR RATE

Channel Error

COUNTER

Rate

*If any of these indicators is on, inform the next higher level of maintenance.

2-20