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SS70A • 15
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.
TX OUT TX IN RX OUT RX IN POWER
Microphone
Microphone
Input
External Speaker
External Speaker or Earphone
SS - 70A
Two Way Radio
Tranceiver
PTT Switch
Ptt Line
TX OUT TX IN RX OUT RX IN POWER
Audio Source
Test speaker
"Loop-through" Audio Test
Set S3 Input switch to LINE input
Set J4 jumper block for
SPEAKER