Ramsey Electronics manual Configuring the SS70A inputs, Typical HOOK-UPS

Configuring the SS70A inputs:

LINE LEVEL INPUT

ˆDepress pushbutton switch S3 OUT to the LINE position.

SPEAKER LEVEL INPUT

ˆSet pushbutton switch S3 to the IN position to select SPEAKER level input.

Configuring the SS70A outputs:

LINE LEVEL OUTPUT

ˆInstall the jumper block between the pins on J4 labeled “LINE”.

SPEAKER LEVEL OUTPUT

ˆInstall the jumper block between the pins on J4 labeled “SPEAKER”.

Before doing any hasty or blind experimenting, it is useful to understand exactly what we are looking for in the operation of the SS70A Speech Scrambler.

•The TX path through the SS70A is used in two-way operation where we wish to scramble our outgoing or transmitter audio.

•The RX path through the SS70A is used for receiving and unscrambling the scrambled audio. If you are simply using the SS70A for connection to a scanner to decode some scrambled signals, this is the only path you need concern yourself with.

•Since the SS70A has the ability to operate duplex (both TX and RX paths simultaneously), the unit can be configured to “test itself” by sending audio through the unit - scrambling through the TX path and unscrambling through the RX path.

TYPICAL HOOK-UPS

RECEIVER OR SCANNER CONNECTION:

For most scanner hook-ups, we simply connect to the scanner’s external speaker or earphone jack and add another speaker to the output of the SS70A. We configure the SS70A for SPEAKER input and output:

SS70A • 13