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Basic Installation Instructions
Refer to the SNV-12 manual for more complete instructions and explanations of alternate configurations and advanced features.
1) Unpack - Refer to Table 1-2 (Equipment and Accessories Supplied) and the Installation Section of the manual.
2) Pilot Tone - For 2175 Hz pilot tone (rather than 1950 Hz), change switch SW2-1 from "1" to "0" on each SVM module that uses 2175 Hz.
If a receiver's hardwired COR (Unsquelch) output is used, connect to terminal 13 of the SVM-2 terminal block. Connect a ground to terminal 7.
3) Transmitter Keying -
If a relay contact closure to ground is needed, change JP4 of SVM-2 #1 to pins 2&3 "E&M."
If EIA keying tones are used to key the transmitter, change CIM module switch SW2-1,2,3 from "0,0,0" to "1,1,1."
4) Console Keying -
If EIA keying tones will be sent from the console to the voter, change CIM module switch SW2-6 from "0" to "1."
5) TX / RX Site Connections - The transmit site must be connected to SVM-2 #1, which resides in the left most slot as viewed from the front of
the voter. SVM-2 #1 interfaces its transmitter and receiver via rear panel terminal block TB1:
Audio from receiver:
use TB1 terminals 1(+) & 2
Audio to transmitter:
use TB1 terminals 4(+) & 5
PTT output to transmitter:
use TB1 terminal 18 (not needed if EIA keying tone output is used)
Ground to transmitter:
use TB1 terminal 20
6) RX Site Connections - Connect the inputs to the SVM modules via the rear panel TB2 through TB12:
Audio from receiver site 2: use TB2 terminals 1(+) & 2
Audio from receiver site 3: use TB3 terminals 1(+) & 2
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Audio from receiver site 12: use TB12 terminals 1(+) & 2
7) Console Connections - The console interfaces the SNV-12 CIM module via rear panel TB13:
Console TX audio to Voter: use TB13 terminals 1 & 2(+)
Voted audio to the console: use TB13 terminals 4 & 5(+)
PTT input to Voter:
use TB13 terminal 7 (not needed if EIA keying tone input is used)
Ground to Voter:
use TB13 terminal 18
8) Connect Power - 110 VAC or 12 VDC. When power is applied, the unit will self-test. The CPM-1 Fault LED will flash until the unit is fully
ready to begin operation. The unit may also be set for 220 VAC; see the Installation Section of the manual for details.
9) Adjust Audio Levels - RX audio at each SVM must be adjusted as detailed in the Installation Section of the manual. TX audio must be set for
proper transmitter operation. If a console is used, its audio to the voter's CIM console TX audio input must also be adjusted as detailed, and the
proper Voted Audio output level set from the SNV-12 to the console.
SNV-12 Voter Quick Start Guide
Page 2 of 2
Revision 1.1
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