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The TS9085 and TS9065, FM Modulation and AF Spectrum Analysers, have been designed for precision monitoring of FM Radio Broadcasts. Connected to a standard Windows PC, via a USB port, their user friendly interface displays all modulation data on screen for analysis.

Audio outputs are provided for high quality headphone or loudspeaker monitoring, with full RDS decoding available, with live ‘off-air’ data recording. Extensive automatic logging of broadcast data with the included iLog software. Remote control is possible with simple text file commands allowing the unit to be controlled from 3rd party software applications.

Unique to this class of product is a FFT Spectrum Analyser for precise audio analysis.


With the introduction of V5.00, the iLog software now includes GPS decoding to the NMEA global standard. It will automatically scan the PC for any connected GPS NMEA compliant devices. Google Earth .kml files are generated for GPS tagged field measurement. The TS9085G and TS9065G units are supplied with their own USB GPS receiver module.

The enclosure is a custom designed dual-chamber aluminium extrusion, providing excellent screening between the analogue and digital circuitry and providing a extremely robust case for field use.

This combination provides broadcast engineers, whether working on-site or as a mobile unit, with a competitively priced instrument, compatible for use around the world.

  • High performance FM receiver and Modulation Analyser providing broadcast measurements over the band 87.5 to 107.9 MHz in 10kHz steps
  • Signal strength with 80dB range and frequency scanning
  • FM deviation 0 to 100kHz with histogram
  • Modulation Power calculated with 32bit floating-point precision
  • Multipath with XY plot
  • Pilot 19kHz amplitude
  • RDS 57kHz sub-carrier
  • Left and right channel decoding, with stereo quality graphical readout
  • Automatic logging of signal strength, pilot and RDS carrier
  • Remote control with simple text file commands



  • System Measurements
  • Deviation:+100kHz to -100kHz
  • Modulation Power:-8dBr to +12dBr (0dBr ref 19kHz)
  • Pilot 19KHZ:dB or %
  • RDS carrier 57KHz:dB or %
  • Signal Strength:85dBu full scale range
  • Multipath:10dBu full scale range
  • Stereo:0 to 100% modulation
  • Multiplex signal
  • Bandwidth: wideband:0.1Hz to 80kHz < 0.4dB
  • 0.1Hz to 100KHz < 1.0dB
  • Bandwidth: narrowband:0.1Hz to 80kHz < 1.0dB
  • 0.1Hz to 100KHz < 4.0dB
  • Deviation accuracy:0 to 75kHz < +/-0.5% (1kHz test sinusoid)
  • Sub-carrier accuracy:+/-2.0% Wideband +/-3.5% Narrowband
  • System parameters
  • RF Bandwidth:87.5 – 107.95 MHz
  • Input impedance:50 ohms
  • Image rejection:85 dB
  • Sensitivity:2.8 uV
  • RSSI resolution:0.1 dB
  • RSSI accuracy:+/-2.0 dB
  • Multipath resolution:0.1 dB
  • Pilot 19KHz range:18.95 – 19.05 kHz
  • RDS 57kHz range:55.5 – 58.5 kHz
  • THD narrowband:0.100% @ 1kHz
  • THD wideband:0.015% @ 1kHz
  • Stereo cross-talk:42 dB
  • Signal connections
  • Front connections:BNC 50 ohm IF filter output 100mV RMS at 10.7Mhz with 80dBu antenna signal
  • BNC MPX multiplex. Output 50ohms 0dBm at 75KHz
  • Jack 3.5mm Stereo monitor for headphone listening
  • BNC 50 ohm Alarm 10mA output
  • BNC 50 ohm IF input at 10.7MHz
  • BNC Analyser input >10Kohms 0dBm (FM multiplex or audio spectrum analyser)
  • Rear connections:BNC Antenna input 50ohms
  • USB 1.1 and 2 compatible (Not suitable for non-powered hubs)
  • Jack 3.5mm Left channel balanced output
  • Jack 3.5mm Right channel balanced output
  • BNC RDS 57kHz band-pass output
  • Measurements
  • Dimensions:295mm x 147mm x 36.5mm
  • Weight:1.1 Kgm
  • Spectrum Analyser
  • Resolution:16 bits
  • Input impedance:10K ohms
  • Input attenuator:+/-10dB
  • Dynamic Range:>100dB
  • Dynamic Range Averaged:>110dB
  • Bandwidth:100kHz
  • Resolution:20Hz
  • Screen resolutions
  • XGA:1024 x 768
  • WXGA:1280 x 800
  • SXGA:1280 x 1024
  • WXGA+:1440 x 900
  • SXGA+:1400 x 1050
  • UXGA:1600 x 1200
  • WSXGA:1680 x 1050
  • WUXGA:1920 x 1200

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TS9085 Datasheet


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