User's Manual

Jotron AS| TR7750C: Operators Manual  Installation
Page 4-8
P/N: 84748 (G)
Menu path:
TX config ►
Parameter
Range
Default
Details
Keying
(TX)
Loop key bias
+12V, Gnd,
floating
Floating
Connects the center pin of the line input
transformer to:
 Floating: The center pin is not
connected. If loop keying is used,
an external voltage must be
applied to pin 3 (REM connector)
in order to key the transmitter
 Gnd: The center pin is grounded. If
loop keying is used, an external
voltage must be applied to pin 3
(REM connector) in order to key
the transmitter.
 +12V: A 12V DC is supplied on pin
3(REM/TR connector). The
transmitter can be keyed with a
relay (or equivalent) that create a
DC path on the line input pin, pin 3
and 6 (REM/TR connector).
Table 4.6-4, Settings associated with LINE_INPUT (TX-REM)
 Line output, receiver: This is the receiver audio line output. This signal is usually connected
to the VCS system or a remote control that uses a 600 ohm line interface.
Menu path:
RX config ►
Parameter
Range
Default
Details
Audio
(RX)
Output source
Speaker |
Headphone |
Lineout |
VoIP
Speaker,
Headphone,
Lineout
The output source determines where the
received audio is output.
 Line: Output audio on the 600
ohm line interface
 Speaker: Output audio on the
integrated speaker.
 Headphone: Output audio to a
headphone connected to the front
panel connector.
 VoIP: Output audio on the IP
interface (availability depends on
radio specifications).
Audio
(RX)
Line output level
-40 to +10 dBm
1 dB steps
-10 dBm
Set the maximum output level on the 600
ohm line output.
Table 4.6-5, Settings associated with LINE_OUTPUT (RX-REM)