Master Clock-Networked Clock Controlled Tone or Voice Over Paging

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Price: $999.95
Part #: CTG-2A
Manufacturer: Viking Electronics
Mfr Part #: CTG-2A

Networked Clock Controlled Tone / Message Generator and Master Clock

Viking’s model CTG-2A is a networked clock controlled tone/message generator designed to provide accurately timed tones and/or messages over your existing paging system. This provides a cost effective way of signaling school period changes, factory shifts, breaks, lunch periods, etc.

Four programmable trigger inputs which are ideal for triggering emergency alert tones/messages to indicate fire evacuation, severe weather, lock down, all clear or can be used in store caster applications for “customer service required” announcements, etc. The CTG-2A can also be used as a master clock to synchronize Viking CL Series wireless clocks.

The CTG-2A comes equipped with up to 6 minutes of CD quality WAV file audio storage for up to 14 different tone/messages. The unit is factory loaded with common school, business and factory tones but can be programmed with your custom tones/messages or updated from the list of WAV files from the Viking web site.

The CTG-2A can be programmed with up to 14 schedules and up to 1,000 events allowing you to program an entire year or multiple years of schedules in advance. The CTG-2A’s extremely accurate time base can be manually synchronized, synchronized with 50 or 60 Hz power or can be programmed to periodically synchronize to network or internet time.

The CTG-2A comes with programming software and a network port to allow PC programming of timed events, schedules, clock synchronization, wave file download, message volume, day light savings time, auxiliary relay control, etc.


  • Signal the beginning and end of class periods, breaks and lunch periods for schools
  • Signal the beginning and end of shifts, breaks and lunch periods for factories/businesses
  • Provide trigger controlled emergency alert messages for fire, flood, severe weather, lock down, etc.
  • Provide messages at specific times for store sales, promotions, closing times, airport loading zones, etc.
  • Provide Auxiliary contact activation at specific times for specific durations for controlling lights, cameras, unlocking doors/gates, etc.
  • The CTG-2A can also be used as a Master Clock to synchronize Viking CL Series wireless clocks (DOD# 466)


  • Up to 14 Schedules and up to 1,000 Events
  • 6 minutes of CD quality WAV file record time
  • Up to 14 different tones or messages
  • 4 programmable trigger inputs for emergency tones, etc.
  • Automatic Day Light Savings Time and leap year correction
  • Programmable NTP Clock synchronization
  • PC programming software included • RS485 clock SYNC terminals for remote Master Clock control of Viking CL Series RF synchronized clocks
  • Non-volatile memory with 4 day clock back up
  • Factory loaded with school/factory tones and evacuation signals (ANSI S3.41), etc.
  • Remote program via TCP/IP network
  • Page trigger outputs (12VDC and DPDT relay)
  • Programmable Auxiliary relay contacts (DPDT)
  • 24 hour digital clock displays hours & minutes
  • One mono line level pre-amp input and audio output
  • Built-in 1 watt mono audio amplifier
  • One isolated audio output for PABX / dial access paging
  • Master volume control
  • Programmable volume control per tone/message
  • Time base selection: Network, 50/60Hz or internal
  • Programmable message repeat count for trigger inputs


  • Internal Clock Backup Time: 4 days
  • Power: 120V AC/13.8V AC 1.25A UL listed adapter provided, max current draw: 650mA
  • Dimensions: 210mm x 159mm x 45mm (8.25” x 6.25” x 1.75”)
  • Weight: 1.5 Kg (3.2 lbs)
  • Environmental: 0°C to 32°C (32°F to 90°F) with 5 - 95% non-condensing humidity
  • Preamp (Audio 1/2) Output: 6V RMS across 600 ohms
  • Paging Amplifier Output: 1 watt - powers up to (2) 8 ohm or (12) 45 ohm speakers
  • Sound Pressure: 85 dB @ 1 meter (loud electronic warble from 25AE paging horn)
  • Maximum Speaker Output Wire Run: 91m (300 ft), 18 AWG
  • Maximum Load on Page Trigger Output: 1K ohm
  • WAV File Resolution: 16 bit or 8 bit
  • WAV File Sampling Rate: 44.1K, 22K or 11K
  • Time Base: 50/60 Hz or internal with NTP clock sync
  • Internal Time Base Accuracy: +/- 2ppm (63 seconds per year) without network time sync or manual adjustment
  • Connections: 29 screw terminal block positions, (1) RJ45 network jack

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