FMCS-1 LITE ALL-IN-ONE FM Modulation Monitor
Description
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 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
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 6 dB 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
- Crosstalk — L-R to L+R
- 90 dB min
- Crosstalk — SCA to L+R
- 90 dB min
- Crosstalk — SCA to L-R
- 90 dB min
FFT Spectrum Analysis
RF, Composite, Audio
- Display Modes
- Realtime, Peak Hold, Average, Infinite Hold
- Amplitude — Number of Points
- 181
- Amplitude — Scale
- +100.0 to -150.0 dB adjustable
- Amplitude — Resolution
- 0.1 dB
- Frequency — Number of Points
- 501
- Resolution BW — RF
- 25, 50, 100, 250, 500, 1000, 1500, 2000, 2500 Hz
- Resolution BW — Composite
- 5, 10, 25, 50, 125, 250 Hz
- Resolution BW — Audio
- 1, 2, 5, 10, 25, 50 Hz
Metering
- Total, L, R, L+R, L-R, Pilot, SCA Modulation
- 0 to 150%, 0.1% resolution
- Pilot, RDS, SCA Injection
- 0 to 15.0%, 0.1% resolution
- Accuracy at all Modulation Levels
- ±1.0% or better
- Normalization (except SCA)
- ±75 kHz equals 100% modulation
- Normalization (SCA)
- 1.0 to 7.0 kHz equals 100% modulation
- RMS — Total, L, R, L+R, L-R
- +3.0 to -120.0 dB, 0.1 dB resolution; Flat & 50 µs or 75 µs
- 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 resolution
- 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
- Mini B Male Port
- Ethernet 10/100 Base-T
- RJ-45 Jack
Power Supply
- Operating Input Voltage
- 90 to 264 VAC
- Operating Input Frequency
- 47 to 63 Hz
- Power Requirements
- 34 Watts
Environmental
- Temperature Range
- -22 to +122°F (-30 to +50°C)
- Ambient Temperature Range for Operation
- +32 to +104°F (0 to +40°C)
- Altitude
- 15,000 ft (4572 m) AMSL
- Relative Humidity
- 95% max., non-condensing
Packaging
- FMCS-1L Dimensions
- 19" × 1.75" × 14.5" (48.26 × 4.45 × 36.83 cm), 1 EIA Rack Units
- Shipping Weight
- 10 lbs (4.5 kg)
- Shipping Carton
- 25" × 18" × 4" (63.5 × 45.7 × 8.46 cm)
Specifications are subject to change without prior notice.
Downloads
Operator Manual
Complete operating instructions, setup information, controls, connections, and technical information for the FMCS-1L.
View Manual →Software & Updates
Download current FMCS-1L software and review available updates.
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