REAR PANEL
7) CONNECTOR: antenna (N-F type connector).
8) CONNECTOR: modulation audio input (XLR3-F type connector).
The audio input line is transformer balanced and floating.
pin 1 = ground; pin 2 = AF-a input; pin 3 = AF-b input.
9) - 6.3 mm, standard jack
type).
The transmission is allowed when the central pin (hot) is connected to external ring
(ground).
Note #1: in the standard version of CST 38, when the PTT plug is not inserted, the carrier
is still activated.
Instead, when the CST 38 is provided with the optional VOX 38 Voice Activated Circuit
board, the carrier is activated automatically only when the input audio-signal reaches the
activation-threshold pre-set in the VOX 38 board. However, the external PTT circuit (if
connected) can override the VOX 38 device and force the CST 38 in continuous
transmission.
10) CONNECTOR: dc power input (10.5 ÷ 16 Vdc).
( pin 1 = +Vdc, pin 2 = ground).
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