TEST LOGIC AND LAMP DRIVING

TM 11-6625-2885-30/NAVAIR 16-35TS3614-2

TEST LOGIC AND LAMP DRIVING

In the following description, SLL O is a signal between 0.0 and +0.6

2-5.

volts. SLL 1 is a signal between +2.4 and +5.0 volts. Normal operation

of the FLTS tests a CM set. A normal RF level from the CM set transmit

antenna causes a SLL O Receiver Threshold Exceeded Signal (1) in the FLTS

receiver assembly. This SLL O signal lights a JAM indicator (2) in the

FLTS video assembly.

The FLTS transmitter assembly sends test signals to the CM set receive antenna.

Normal CM set response to these signals sets six LRU-1 status signals (5) to

SLL O. When these six status signals and the Receiver Threshold Exceeded

Signal are all at SLL O, they light a GO/NO GO indicator (3) in the FLTS video

assembly.

In self-test operation, jumper cable W4 sends RF from the transmitter assembly

to the receiver assembly. The test logic circuits receive a threshold exceeded

signal (1) from the receiver assembly which lights the JAM lamp (2) and enables

the GO/NO GO lamp (3). In self-test, the JAM light confirms the RF level at

the FLTS transmitter. The test switch (4) replaces the status signals (5),

lighting the GO/NO GO lamp.

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