Raytheon SNV-12 User manual

SNV-12 Voter Quick Start Guide
Page 1 of 2 Revision 1.1
This Quick Start Guide describes a typical SNV-12 installation with multiple receivers, a single transmitter, and a dispatch console. The SNV-12
voter can be set up for a wide variety of other system configurations; please refer to the manual for advanced capabilities and options.
The SNV-12 is configured and adjusted at the factory for the following;
•FM receivers (use line audio, not discriminator audio)
•1950 Hz pilot tone from all receivers (the PTG-10 Pilot Tone Generator is available from Raytheon)
•E&M Console keying input to voter (relay closure to ground or low level logic input signal activates the voter’s PTT input)
•Hard-wired transmitter keying output (open collector transistor pulls transmitter PTT low; relay contact closure optional – see page 2)
•Full Duplex (each SVM module can simultaneously transmit and receive)
•Repeat Mode is enabled, so voted audio is retransmitted via SVM module #1
•Console Priority is selected, so transmissions from the dispatcher will preempt retransmission of voted audio
•All audio is 600 ohm balanced; input/output audio levels are initially set to -10dBm
PTT
System
TB-1
RX Audio / Pilot Tone Receiver #1
TB-13
Receiver #2
Receiver #3
Receiver #N
1
2
4
5
18
TX Audio
RX Audio / Pilot Tone
RX Audio / Pilot Tone
1
2
4
5
7
1
2
1
2
2
1
TB-2
TB-3
TB-N
Console TX Audio
Voted Audio
PTT
Console
+
_
+
_
+
_
+
_
+
_
+
_
_
+
SNV-12
Site #1
Site #2
Site #3
Site #N
RX Audio / Pilot Tone
Ground 18 20 Ground Transmitter

SNV-12 Voter Quick Start Guide
Page 2 of 2 Revision 1.1
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
•
•
•
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.