Ramsey Electronics SS70A - Manual (Page 13)

SS70A • 13
Configuring the SS70A inputs:
LINE LEVEL INPUT
ˆ
Depress pushbutton switch S3 OUT to the LINE position.
SPEAKER LEVEL INPUT
ˆ
Set pushbutton switch S3 to the IN position to select SPEAKER level
input.
Configuring the SS70A outputs:
LINE LEVEL OUTPUT
ˆ
Install the jumper block between the pins on J4 labeled “LINE”.
SPEAKER LEVEL OUTPUT
ˆ
Install 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: