Summary
The Belar FMCS-1L provides a complete solution for the Analog portions of the FM signal. The unit combines the features and functions of an RF amplifier, FM demod, stereo demod, RDS decoder, SCA decoder, and FFT spectrum analyzer in one product.
Using state of the art DSP techniques all of FMCS-1L processing takes place in the digital domain, this results in FM analog performance that was previously not possible.
The Belar FMCS-1L All-in-One FM Modulation Monitor is a wideband FM monitor which meets the Federal Communications Commission requirements for measuring the total modulation characteristics of monaural as well as the stereo modulation characteristics of multiplexed FM transmitters. On board processing provides spectral analysis of the pre demodulation and post demodulation signals. Internally generated calibration signals permit checking monitor accuracy at any time. Ethernet/USB ports and a graphical user interface enable local or remote operation of the FMCS-1L via an external PC.
Features
- Frequency Agile Antenna and High Level RF Inputs
- AM & Sync AM Noise Measurements
- Variable Bandwidth Digital IF Filtering with HD Carrier Suppression
- Digital FM Demodulation with 100 dB 75ms SNR
- Variable BW Composite Filtering
- Digital Stereo Demodulation with 90 dB L/R Separations
- Full Metering of Analog Peak and RMS Values
- RDS Injection and Data Decoding
- Two Digital SCA Decoders
- RF, Composite and Audio FFT Spectrum Analysis
- RJ – 45 Ethernet Interface with Remote PC Software
Technical Specifications
RF Inputs
Frequency Range
- 87.3 to 108.1 MHz, Frequency Agile
- 100 kHz Increments
High Level Input
- 400 mVrms to 3.5 Vrms , 50Ω, BNC Connector
Antenna Input
- 100μV sensitivity, 75Ω, F-Type Connector
- 500 mVrms Maximum
Metering
Modulation (Peak, Ave, Min)
- Total, L, R, L+R, L-R
- 0 to 150%, 0.1% resolution
Pilot
- 0 to 15.0%, 0.1% resolution
RMS
Total, L, R, L+R, L–R
- +3.0 to 120.0 dB, 0.1 dB resolution
- Flat & 50μs or 75μs
AM Noise, Sync AM Noise
- 0.0 to -100.0 dB, 0.1 dB resolution
Separation
- 0.0 to 120.0 dB, 0.1 dB
Crosstalk
- 0.0 to 120.0 dB, 0.1 dB resolution
Indicators
- Total Peak Modulation
- L+R Presence
- RF Presence
- Pilot Presence∙RDS Sync & Presence
- SCA #1 Peak and Presence
- SCA #2 Peak and Presence∙AM Noise Limit
- SYNC AM Noise Limit
Alarm Outputs
Relays (4 assignable)
- FORM C, 15-pin Female D-Sub Connector
Computer Interface
- USB Port
- Ethernet 10/100 Base -TRJ-45 Jack
Packaging
Dimensions
- 19″x1.75″x14.5″ (48.26×4.45×36.83 cm),1 EIA Rack Unit
Power Requirements
- 40 Watts, 90-264V, 47 to 63 Hz
Shipping Weight
- 10 lbs (4.5 kg)
Shipping Carton
- 22″x18″x6″ (55.9×45.7×15.2 cm)
