Overview
Belar FMCS-1, All-In-One FM Modulation Monitor
The Belar FMCS-1 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 the FMCS-1 processing takes place in the digital domain, this results in FM analog performance that was previously not possible.
The Belar FMCS-1 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-1 via
an external PC.
Features
- Frequency Agile Antenna and High Level RF Input
- AM & Sync AM Noise Measurements
- Variable Bandwidth Digital IF Filtering with HD Carrier Suppression
- Digital FM Demodulation with 100 dB 75µs 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
Specifications / Documents
- 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
- High Level Input (Optional !6dB Attenuator): 1 to 7 Vrms, 50Ω, BNC Connector
- Antenna Input: 100 µV sensitivity, 75Ω, F-Type Connector 500 mVrms Maximum
- FM Demodulator (Analog/Digital Composite Outputs)
- Frequency Response: ±0.15 dB, 20 Hz to 100 kHz
- SNR: 90 dB, 50/75 µs de-emphasis
- Distortion: 0.01%, 50/75 µs de-emphasis
- IMD SMPTE (60 Hz / 7 kHz 4:1): 0.01%
- Stereo Decoder (Analog/AES Outputs)
- Frequency Response (L and R): ±0.1 dB, 20 Hz to 15 kHz
- SNR (Stereo): 85 dB, 50/75 µs de-emphasis
- Distortion: 0.01%, 10 Hz to 15 kHz, 50/75 µs de-emphasis
- IMD SMPTE (60 Hz / 7 kHz 4:1): 0.01%
- Separation: L to R, R to L: 90 dB, 10 Hz to 15 kHz
- Crosstalk
- L+R to L!R: 90 dB min
- L!R to L+R: 90 dB min
- SCA to L+R: 90 dB min
- SCA to L!R: 90 dB min
- 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
- Composite Outputs
- Analog (2 buffered): 5 Vrms @ 100%, 75Ω unbalanced BNC Connector
- Digital (2 buffered): LVDS, 100Ω, RJ-45 Connector
- Audio Outputs
- Analog Outputs (6 assignable): +10 dBm, 600Ω balanced XLR Connector
- Analog Outputs (2 assignable): 1.25 Vrms, 75Ω unbalanced BNC Connector
- AES-3ID (8 assignable): 1.0 Vpk-pk, 75Ω, BNC Connector
- Headphone (assignable): 1/4" Phone Jack
- Alarm Outputs: Relays (4 assignable): FORM C, 15-pin Female D-Sub Connector
- Computer Interface
- USB: Mini B Male Port
- Ethernet 10/100 Base -T: RJ-45 Jack
- Weight & Dimension
- FMCS-1 Dimensions: 19"x3.5"x14.5" (48.26x8.89x36.83 cm), 2 EIA Rack Units
- Shipping Weight: 15 lbs (6.8 kg)
- Shipping Carton: 25"x18"x6" (63.5x45.7x15.2 cm)
