User's Manual

Technical Manual Installation & Operation
JMP 10 Controls the direction of the RS-
232 TX and RX data.
Swap 2-3
JMP 11 Controls the direction of the RS-
232 TX and RX data.
Swap 2-3
JMP 12 Trunking RX Talk function.
Disables RX VF to line and TTR
VF. The function polarity or nil
can be selected.
Active low 1-2
JMP 13 Enables or disables the HIGH
PASS FILTER for the TX audio.
Enabled 1-2
JMP 14 Repeater enable. Trunking
LIFULOCEN function. The
function polarity or nil can be
selected. Note that this control is
in parallel with DIP S/W 2/4
Active low 1-2
JMP15 Selects the connection for the
common pin on the digital I/O
connector to either ETH or + 5
volts.
ETH 2-3
JMP16 Enables or disables the Low
frequency HPF used for the
Repeater VF routing.
Enabled 1-2
JMP17 Selects the Mute / Squelch output
polarity to either normally high or
low.
Active low 1-2
JMP 18 Trunking TX Talk function.
Disables TX VF to line and TTR
VF. The function polarity or nil
can be selected.
Active low 1-2
JMP 19 Selects either internal pull up to
5V or internal pull down to ETH
for digital input on D25
connector.
Pull up 2-3
JMP 22 Microphone gain. Fit this jumper
to increase Mic gain 33dB
Low gain Not fitted
JMP 23 Enable tone to speaker. Fit this
jumper to enable tone
Disabled Not fitted
JMP 24 RS232 port termination. This
jumper allows an internal
termination to be selected or not
for bussed RS232 connections.
Up to 16 units may be bussed.
All bussed bases are ‘listeners’ on
the modem RS232 TX port. All
bussed bases have their RS232
TX ports diode to the modem Rx
port.
Normal: Non-bussed mode.
No resistor fitted.
D10 out of circuit.
Master: Bussed mode.
Normal 1-2
1-2
2-3
© SPECTRA ENGINEERING 2008 Revision 4.3.1B
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