Nautel VS1 – 1kW FM Transmitter

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Nautel’s new VS Series FM transmitters are engineered to meet today’s most challenging broadcast requirements with an exceptional combination of robustness and reliability in a cost effective design. But the VS Series goes even further with industry first innovations such as IP audio I/O, Livewire Support and Nautel’s Advanced User Interface (AUI). Each VS transmitter has been optimized for its specific power output to maximize functionality and quality resulting in outstanding value.



  • Ultra compact: just 3 RU
  • Integrated exciter
  • Advanced User Interface (via web)
  • Front panel LCD control
  • 100% of local control via the web
  • IP Audio I/O, an industry first
  • Advanced instrumentation and management
  • USB backup audio automation

Technical Specification

Technical Specification

Transmitter Type

  • FM Broadcast, 100% solid state


  • Four power amplifiers with one switching power supply
  • One pre-amp/IPA with one switching power supply
  • Integrated exciter/controller

RF Output Connection

  • 7/16 DIN, female standard
  • 7/8″ EIA female optional

RF Output Impedance

  • 50 ohms unbalanced


  • 1.5:1 – Automatic power reduction into higher VSWR
  • Protected from open and short circuits at all phase angles

RF Frequency Range

  • 87 MHz to 108 MHz in 10kHz steps
  • No tuning required

Spurious and Harmonic

  • Meets or exceeds all FCC/IC/CE requirements

HD Upgrade

  • Upgrade to digital is achieved with the addition of an external 2RU VS HD box. The HD upgrade provides the Exgine card and iBiquity software necessary to broadcast your signal in HD
  • The VS HD has no user interface and is controlled locally or remotely from the VS Series display or AUI.


  • Integrated analog FM exciter using direct-to-channel digital modulation
  • Built-in RDS encoder, SCA encoder and Stereo generator

Audio Sources

  • AES, Analog L/R, Composite, Audio Player (IP stream/USB)
  • Up to four audio sources may be enabled with priority levels

Audio Player Inputs

  • Ethernet connection (IP audio stream): Shoutcast, Livewire 1.0
  • USB drive (Audio files): MP3, PCM

Audio Backup

  • Automatic failover to backup audio source in the event that main audio source becomes unavailable

Digital or Analog Stereo Input

  • 80 dB below 100% modulation (reference 400 Hz, measured in 22 Hz to 22 kHz bandwidth with 75 μs de-emphasis and DIN ‘A’ weighting)

Monaural Digital/Analog or Wideband Composite Operation

  • 90 dB below 100% modulation (reference 400 Hz, measured in 22 Hz to 22 kHz bandwidth with 75 μs de-emphasis and DIN ‘A’ weighting)


  • 180 V ac to 264 V ac, 1 phase, 50/60 Hz

Power Consumption


  • 2120 kW at 1250 kW RF output (2140 kVA) typical-20 dB hybrid mode
  • 2104 W at 1010 W RF output (2125 VA) typical-14 dB hybrid mode
  • 1738 W at 730 W RF output (1756 VA) typical-10 dB hybrid mode
  • 1419 W at 525 W RF output (1433 VA) typical

Power Factor

  • Unity Power Factor Corrected (typically 0.99)

Power Line Harmonics

  • IEEE 519-1992

RF Output Power and Efficiency

Analog Mode HD Radio Hybrid (-20dB) HD Radio Hybrid (-14dB) HD Radio Hybrid (-10dB)
Analog TPO (W) 32 – 1400 1000 730 525
Typical Efficiency
59% 48% 42% 37%

*Typical power measured at midband in MP1 mode with better than 1.2 VSWR. Compliant with NRSC measurement standards. Power outputs vary with injection level, frequency, VSWR, MP operating mode, symmetrical vs. asymmetrical sidebands. Numbers shown do not include HD PowerBoost which can provide up to 25% additional hybrid mode power and up to 5% increased efficiency. Efficiency shown at rated power. Please contact your Nautel representative to discuss your specific HD power requirement.


  • Allows VS Series to be set up as part of a network and monitored remotely via a single control point

Streaming audio

  • Broadcast streaming audio sources such as Shoutcast/Icecast and Livewire 1.0

Remote AUI

  • Remotely connect to a VS transmitter via Nautel’s
  • Advanced User Interface. Remote connectivity allows for setting of operating parameters and viewing the transmitter status from any web enabled device.

E-mail notification

  • Automatically receive e-mail notifications when an alarm has been activated.

Asynchronous AM S/N Ratio

  • Better than 60 dB below reference carrier with 100% amplitude modulation using 75 μs de-emphasis (no FM modulation present)

Synchronous AM S/N Ratio

  • Better than 50 dB below reference carrier with 100% amplitude modulation using 75 μs de-emphasis

Local Interface (front panel LCD)

  • Presets
  • Logs
  • Status (meters and active alarms)
  • Status
  • Tricolor LED’s for summary status functions

Remote Interface (AUI)

  • Software upgrades
  • Presets
  • Remote I/O setup
  • Logs
  • Status (meters and active alarms)
  • Audio Player setup
  • Audio spectrum analyzer
  • Audio levels

Temperature Range

  • 0°C to +50°C
  • Derate 3°C per 500 m above sea level (2°C per 1000 ft)

Humidity Range

  • 0% to 95% non-condensing


  • 0 m to 3000 m (0 ft to 10,000 ft)

Cooling Air Requirements

  • 297 m3/hr (175 cfm)


Open ventilation configuration:

W =     Standard 19″ (48.3 cm) EIA rack [minimum opening of 17.5″ (44.5 cm)]

H =      3 RU = 5.25″ (13.3 cm)

D =      Dependent upon connector type (not including handles)

  •             7/16″ DIN = 26.4″ (67.1 cm)
  •             7/8″ EIA = 27.4″ (69.6 cm)


  • 16.8 kg (37 lbs)

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