Ramsey Electronics SS70A manual Loop-through Audio Test

the message back, switch the power switch to “bypass” mode to hear the scrambled message.

TYPICAL TWO-WAY RADIO HOOKUP: (SS70A required at each end)

The two-way radio hookup is complicated somewhat by having to pay attention to the PTT (Push To Talk) line of the radio transceiver. This line “keys” the transmitter when the button is depressed, and cannot be excluded from your wiring considerations. Our basic audio connections are very simple, we run our mike audio through the SS70A’s TX path and route the radio’s receive audio through the SS70A RX path. Due to the large number of types of keying circuits, it is best to contact the transceiver manufacturer concerning proper installation of this scrambler “in line” with your radio. Once again it should be stated that the end user of this equipment should familiarize themselves with any applicable laws concerning interception and descrambling of any transmission employing speech inversion.

PTT Switch
Microphone
			SS - 70A
					Two Way Radio
TX OUT	TX IN	RX OUT	RX IN	POWER	Tranceiver
					Ptt Line
					Microphone
					Input

External Speaker External Speaker or Earphone

"Loop-through" Audio Test			Test speaker
Set S3 Input switch to LINE input
Set J4 jumper block for
SPEAKER
	TX OUT TX IN	RX OUT	RX IN POWER

Audio Source

SS70A • 15