CTG-2 (Discontinued, use CTG-2A) - Master Clock & Tone Generator Controller | Viking Electronics

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Master Clock / Clock Controlled Tones or Messages Over a Paging System

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Product Details

Viking’s model CTG-2 is a clock controlled tone / message generator designed to provide accurately timed tones and / or messages over an existing paging system. This provides a cost effective way of signaling school period changes, factory shifts, breaks, lunch periods, etc. The CTG-2 has 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-2 can also be used as a master clock to synchronize Viking CL Series wireless clocks (DOD 466).

The CTG-2 comes equipped with up to 6 minutes of CD quality WAV file audio storage for up to 14 different tones / 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-2 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-2’s extremely accurate time base can be manually synchronized, synchronized with 50 or 60 Hz power or can be programmed to periodically synchronize to the Atomic clock via its internal modem.

The CTG-2 comes with programming software and a USB port to allow PC programming of timed events, schedules, Atomic clock synchronization, wave file download, message volume, day light savings time, leap year, 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-2 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 Atomic Clock synchronization
  • USB 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 hour clock back up
  • Factory loaded with school / factory tones and evacuation signals (ANSI S3.41), etc.
  • Remote phone programming for on / off, schedule changes, time sync and resetting trigger inputs
  • Remote program via TCP / IP network when used with a USB over IP network hub
  • Page trigger outputs (12VDC and DPDT relay)
  • Programmable auxiliary relay contacts (DPDT)
  • 24 hour digital clock displays hours and minutes
  • One mono line level pre-amp input and two audio outputs
  • Built-in 2 Watt mono audio amplifier
  • Master volume control
  • Programmable volume control per tone / message
  • Time base selection: Atomic clock, 50 / 60Hz or internal
  • Programmable message repeat count for trigger inputs


  • Power: 120VAC / 13.8VAC 1.25A UL listed adapter provided
  • Maximum Current Draw: 650mA
  • Dimensions: 8.25″ x 6.25″ x 1.75″ (210mm x 159mm x 45mm)
  • Shipping Weight: 3.2 lbs (1.5 kg)
  • Operating Temperature: 32°F to 90°F (0°C to 32°C)
  • Humidity: 5% to 95% non-condensing
  • Preamp (Audio 1 / Audio 2) Output: 6VRMS across 600 Ohms
  • Paging Amplifier Output: 2 Watts – powers up to (3) 8 Ohm or (16) 45 Ohm speakers
  • Sound Pressure: 100dB @ 1 meter (loud electronic warble from 25AE paging horn)
  • REN: 0.0B
  • Maximum Speaker Output Wire Run: 300 ft (91m), 18AWG
  • Maximum Load on Page Trigger Output: 1K Ohm
  • WAV File Resolution: 16 bit or 8 bit
  • WAV File Sampling Rate:
    • 44.1K (90 seconds total)
    • 22K (3 minutes total)
    • 11K (6 minutes total)
  • Time Base: 50 / 60 Hz or internal with atomic clock sync
  • Internal Time Base Accuracy: +/- 2ppm (63 seconds per year) without Atomic Clock sync or manual adjustment
  • Internal Clock Backup Time: 4 hours
  • DPDT Relay Contact Rating: 1A @ 30VDC / 0.5A @ 125VAC, 250VAC maximum
  • Connections: (1) type B USB jack, (31) cage clamp screw terminals


  • FCC Part 68
  • FCC Part 15
  • ANSI


To download a tone for use on your product, right click on the Download icon and select "Save Link As" (instructions may vary slightly per web browser)

Tone Description Preview Download
CTG-2 Alert Tone 1 Single Alert Tone
CTG-2 Alert Tone 2 Double Alert Tone
CTG-2 Attack Wail Civil Defense Siren
CTG-2 Bell 5 sec fade Ringing Bell 5 Second Duration
CTG-2 Bell Ringing Bell 8 Second Duration
CTG-2 Buzzer 4 sec Buzzer 4 Second Duration
CTG-2 Evac Signal Evacuation Signal
CTG-2 Lunch Bell 1 Single Bell
CTG-2 Lunch Bell 2 Double Bell
CTG-2 Lunch Bell 3 Triple Bell