The SNV-12 is a modular receiver voting system which uses individual Digital Signal Processing (DSP) channels to measure the signal-to-noise ratio of received signals for fast and optimum determination of the best received signal. The unit accommodates from 2 to 12 receiver Site Voter Modules in a chassis and interfaces easily with standard dispatch consoles.

FEATURES

• Site Voter Module Audio Inputs
  Input Impedance	Balanced or unbalanced 600 Ohms or 10k Ohms.
  Input Level	-30 to -10 dBm, adjustable.
  Frequency Response	200 to 3200 Hz ± 2 dB.
  Minimum Pilot Tone Sensitivity	-25 dBm.
  Voting Audio Output
  Output	Balanced 600 Ohms.
  Output Level	-20 to +11 dBm, adjustable.
  Frequency Response	200 to 3200 Hz ± 2 dB.
  Absolute Output Delay	Less than 10 msec.
  Distortion	Less than 1%, 200 to 3200 Hz @ 0 dBm.
  Voting Comparator
  Switching Time Between Sites	Less than 1 msec.
  Unselected Output Rejection	Greater then 60 dBm.
  Output Impedance	Balanced 600 Ohms.
  Voting Threshold	1 through 7 dB in 1 dB steps.
  Voting Delay	0 to 5 sec.
  Parallel Control Inputs
  Input Impedance	22k Ohms pullup to +5 VDC.
  Threshold	+2.5 V nominal.
  Input Signal Range	+30 VDC.
  Protection	Up to 200 VDC.
  Parallel Control Outputs
  Output Type	N-channel open collector transistor.
  Maximum Sink Current	100 mA.
  Maximum Open Circuit Voltage	+60 VDC.
  General/Environmental
  Audio Delay	0 to 450 msec in 30 msec steps.
  Serial Port	RS-232 DCE connector (female db9). Baud rates: 300, 1200, 2400, 4800, 9600, 19200, 38400, and 57600.
  Power Supply Front Panel (PSM-1)	Power on/off Switch; AC on LED, DC on LED, +12 VDC LED, -12 VDC LED.
  Console Interface Front Panel	Speaker, Speaker on/off Switch, 1/8” Headphone jack, Volume control,
  (CIM-1)	Norm audio level LED, Peak audio level LED, Fault LED, Remote LED.
  Control Processor Front Panel (CPM-1)	Master LED, Slave 1 LED, Slave 2 LED, Fault LED.
  Site Voter Module Front Panel (SVM-1)	Disable Switch and LED, Select Switch and LED, Voted LED,
  	Unsquelched LED, TX LED, Fault LED.
  Rear Panel	DC fuseholder, AC filter module, Connectors to interface up to 12 site voter
  	modules, Serial remote connector, Console interface connector, and
  	Expansion connector for daisy chaining SNV-12s for voting of up to 36 sites.
  AC Input Power	115 or 230 VAC ± 15%, 47-63 Hz, 100 VA typical, 130 VA maximum.
  DC Input Power	+11 to +15 VDC @ 5 A, nominal.
  Size	5.25” H x 19” W x 11” D (13.3 x 48.3 x 28 cm).
  Temperature	Operating: -20 to +60 degrees C. Storage: -40 to +85 degrees C.
  Humidity	Up to 95% @ 55 degrees C.
  Shock	MIL-STD-810D, Method 516.3, Procedure VI.
  Vibration	MIL-STD-810D, Method 514.3, Category I.

SNV-12

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