NCS-3230 Rev C Instruction Manual
Copyright © 2003, 2004 New Communications Solutions, LLC
8
The Selective Muting function was designed to be compatible with the
NCS-3240 Multi-Switcher
TM
, giving you total Receive and Transmit control
of your station. See the NCS website for Application notes on using the
Multi-Switcher
TM
with the Multi-RX
TM
.
The second function of the DATA connector is for external control of the
Multi-Rx
TM
. Using this function, an external computer can read and set the
status of the front panel switches. Note that these signals are TTL/CMOS
level (0 to +5VDC) and must be converted to RS232 standard levels
(12VDC to –12VDC) in order to connect the Multi-Rx
TM
to a
computer.
Details of the data sent to and from the Multi-Rx
TM
are shown in Section
4.4.
3.5 Recorder Connections
The RECORDER jacks are used to connect an external tape or digital
audio recorder to the Multi-Rx
TM
. This function allows recording of any
radio(s) using either Manual or VOX operated control.
The AUDIO jack is a mini phone jack (1/8” or 3.5mm) and is normally
connected to the audio input of a recorder. The CNTRL jack is a sub-mini
(1/16” or 2.5mm) jack and is used to turn the recorder on and off. This
jack is isolated from ground and uses a dry relay closure so it can control
nearly any recorder.
3.6 MUTE Jack
The MUTE jack is an RCA phono jack. Bringing this input low (~0VDC)
causes all radios to be muted – except for any radios using Selective
Muting. Normally, this connector is tied in parallel with a PTT circuit.
3.7 PWR Connector
The PWR connector is a standard coaxial jack with 2.1mm pin and 5.5mm
shell dimensions.
3.8 Typical Connections
A diagram of typical connections is shown in Section 7 of this manual.
