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4.0 Operating with the Multi-Rx 
 

4.1 Audio levels 

Adjust the volume control on each connected receiver so that the 
corresponding BUSY light is activated when received audio is heard. 
 

4.2 Mode Selection 
 

4.2.1  NORMAL mode 

Moving the MODE Switch to the “out” position selects 

Normal

 

operation of the Multi-Rx

TM

.  In this mode, radios selected on the 

top row of switches will be heard on the left speaker.  Radios 
selected on the bottom row of switches will be heard on the right 
speaker.  Radios selected on both rows of switches will be 
connected to both speakers so they will be heard centered between 
the two speakers.  The Balance control can be adjusted to 
compensate for the operator being closer to one speaker than the 
other. 
 

4.2.2  SPATIAL mode 

Moving the MODE Switch to the “in” position sets 

Spatial

 operation 

of the Multi-Rx

TM

.  In this mode, each radio has a pre-assigned 

location in the audio field as shown below: 

 

 

Selecting a radio with it’s corresponding top row button turns on it’s 
audio in the pre-assigned location.  Selecting a radio with the 
bottom row of buttons sends the radio’s audio to both speakers 
equally, thus centering the audio in the sound field. 

 
NCS-3230 Rev C Instruction Manual 

 

Copyright  © 2003, 2004 New Communications Solutions, LLC 

 

9

 

Summary of Contents for NCS-3230 Multi-Rx

Page 1: ... Multi RxTM INSTRUCTION MANUAL Rev C New Communications Solutions LLC 5364 Valley Mist Trace Suite 101 Norcross Georgia 30092 Toll Free Tel Fax 888 883 5788 Email support ncsradio com Web Site www ncsradio com ...

Page 2: ...or each radio In the Normal mode receive audio can be selectively positioned left right or center in the audio field The Multi RxTM will benefit just about any ham shack Its flexibility and versatility make it ideal for contest stations emergency operations satellite stations repeater sites mobile communications vans and any radio communications environment Connecting to the NCS 3240 Multi Switche...

Page 3: ...o work with voltages between 10 14 VDC Voltages higher than 15V will cause an internal fuse in the Multi RxTM to open to protect certain components If the fuse opens the unit will need to be returned to NCS for out of warranty repair Most Wall Power supplies on the market that are advertised as 12 VDC are not regulated and may put out as much as 20 VDC when not connected to a piece of equipment Th...

Page 4: ... for the Right channel RIGHT CH In the Normal mode the top row of switches select which radio s will be connected to the Left speaker and the bottom row of switches select which radio s will be connected to the Right speaker In the Spatial mode the top row of switches turns on the audio of the selected radio s in the appropriate position s in the sound field The bottom row of switches produces aud...

Page 5: ...VOX operation depends on having enough audio level The BUSY lights indicate the signal level and if they are on there is enough audio to activate the VOX record function There is a delay 5 10 sec built in to the drop out time of the VOX record function so the recorder will continue to record during short pauses in the received audio When the record function is on and recording the RECORD ON LED wi...

Page 6: ...nnect external equipment such as equalizers DSP filters or external audio amplifiers Note there are two pairs of jacks one pair for the Left channel L and the other for the Right channel R The MIXER OUT signal consists of receive audio mixed as selected by the front panel switches These outputs are at line level nominally 100 200 mV The AMP IN signal should also be at line level To use these jacks...

Page 7: ...oses The first is Selective Muting There is one input line on this connector for each of the six radios Selective Muting works in conjunction with the Mute jack to enable you to mute all radios except one when you key PTT To use selective muting the pin for any radio you DO NOT want to mute when transmitting must have a low logic 0 level 0VDC This can be a TTL or CMOS level or a relay or switch cl...

Page 8: ...own 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 RxTM 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 use...

Page 9: ... be connected to both speakers so they will be heard centered between the two speakers The Balance control can be adjusted to compensate for the operator being closer to one speaker than the other 4 2 2 SPATIAL mode Moving the MODE Switch to the in position sets Spatial operation of the Multi RxTM In this mode each radio has a pre assigned location in the audio field as shown below Selecting a rad...

Page 10: ... mute functions So even if a radio is not being heard through a speaker it can be recorded The red RECORD ON LED will light when actually recording Note there is an approximately 5 second dropout delay between the time activity ceases and the recorder stops 4 4 Computer Interfacing The Multi RxTM can communicate with an external computer using serial data When connecting to a computer you will nee...

Page 11: ...yte Radio 6 Radio 5 Radio 4 Radio 3 Radio 2 Radio 1 4 4 3 Status Inquiry To determine the current status of the front panel switches send the following command to the Multi Rx TM and it will respond with two data bytes containing the status as shown in 4 4 2 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 1 1 X X X X X X X Don t Care 4 4 4 Set Command To set the front panel switches the following ...

Page 12: ...hes away from equipment that radiates AC magnetic fields Another source of hum can be a ground loop This is a situation when pieces of audio equipment that are connected together do not have their grounds well connected This results in a voltage difference between the equipment grounds and can be a safety hazard as well as introducing electrical problems The solution to this problem is to tie all ...

Page 13: ...your RF ground is low impedance Refer to any reliable Amateur Radio publication for detailed information on RF problems and RF grounding 5 Getting Help from NCS NCS wants you to experience trouble free operation of our equipment If you have any questions comments or need technical help please use the following resources 1 Go to the web site www ncsradio com Here you will find the latest instructio...

Page 14: ...RD ENABLE Enables recording When off out no recording can occur RECORD ON LED Lights when recorder is running MODE Switch Determines Normal out or Spatial in mode SPEAKERS Turns speakers off out and on in PHONES Connector in 6 4 mm stereo phone jack Rear Panel Connections AUDIO IN Inputs from speaker jacks on radios Approx 150mV required to light BUSY LEDs MIXER OUT Line level outputs from interna...

Page 15: ...ons Solutions LLC MODEL NCS 3230 3230 Mixer Out Amp In New Communications Solutions LLC Norcross GA 30092 Model Number Serial Number Tape Recorder Radio 1 Radio 4 Radio 2 Radio 5 Radio 3 Radio 6 Left Speaker Right Speaker Typical Connections 12VDC Power Supply NCS 3230 Rev C Instruction Manual Copyright 2003 2004 New Communications Solutions LLC 15 ...

Page 16: ...Right Mixer Mixer Radio 2 Radio 3 Radio 4 Radio 5 Record Mixer Record Audio Line Out Record Control Record Radio 1 Record Radio 6 Audio Detection Busy Lights Man Vox Record Record V Recording LED Off VOX MA N Functional Block Diagram NORMAL Audio Mode NCS 3230 Rev C Instruction Manual Copyright 2003 2004 New Communications Solutions LLC 16 ...

Page 17: ...e Out Record Control Record Radio 1 Record Radio 6 Audio Detection Busy Lights Man Vox Record Record V Recording LED Off VOX MAN Functional Block Diagram SPATIAL Audio Mode Mixer Virtual Speaker Radio 1 Virtual Speaker Radio 6 Virtual Speaker Radio 5 Virtual Speaker Radio 4 Virtual Speaker Radio 3 Virtual Speaker Radio 2 NCS 3230 Rev C Instruction Manual Copyright 2003 2004 New Communications Solu...

Page 18: ...o immediately void the terms of the warranty For those products returned that prove to be defective and covered under the warranty the Customer will bear the cost of shipment for the return of the product to NCS Collect shipments will not be accepted NCS will bear the cost of shipment for return of the product to the Customer after repair replacement Mode of shipment for return to the Customer wil...

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