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7880DM-FM Series

FM/FM-HD Demodulators

Product ManualManual
  • VistaLINK® enabled
  • New

The 7880DM-FM series is a complete hardware based solution for demodulating analog and digital FM//FM-HD signals. With a modular form-factor, the 7880DM-FM represents one of the highest density and most flexible solutions in the industry providing 8 demodulators in a single slot card.

Applications include signal reception for cable, DTH and IPTV providers, or any other small to large head-end operators who need to receive and distribute local content. The 7880DM-FM has IP output, ideal for turnaround, transcoding, transporting, monitoring or other applications where the received signal remains in the compressed domain.

Advanced RDS (Radio Data System) and RBDS (Radio Broadcast Data System) decoder and processor for demodulation, symbol decoding, block synchronization, error detection, and error correction. The RDS decoder provides several significant benefits including very fast and robust RDS synchronization in noisy signal levels with very high block error rates (BLER), industry-leading sensitivity, and improved data reliability in all signal environments.

Monitoring parameters such as RSSI, SNR and channel stability presents a convenient solution for broadcasters and cable companies who wish to not only receive, but also remotely monitor signal quality. These parameters as well as full control of the demodulator are relayed over SNMP, for convenient remote access using Evertz' own VistaLINK® PRO SNMP monitoring and control package.

Features
  • Modular design, allowing flexible configurations along with easy system reconfiguration and service
  • 8 FM Tuner modules with digital output for MPEG encoding, streaming
  • Supports WorldDMB Receiver Profiles 1 and 2
  • Advanced audio DSP processing
  • Programmable FM tuner parameters (FM stereo-mono blend, dynamic FM channel bandwidth, AM/FM hi-cut filters)
  • Incorporate a preemphasis filter to improve the signal-to-noise ratio of FM receivers
  • Monitoring of FM quality parameters and RDS signal parameters (PI, PS)
  • Comprehensive signal quality metrics: RSSI, SNR, frequency offset, and channel stability
  • Up to four units may be mounted in the 7801FR 1RU chassis, capable of receiving 32 FM signals in 1RU
  • Up to fourteen units may be mounted in the 7800FR 3RU chassis, capable of receiving 112 signals in 3RU
  • Local control panel option available in 1RU frame
  • Remote control panel option available in 3RU frame
  • Control through web-browser or SNMP using third-party application or Evertz' own SNMP control and monitoring software
  • SMPTE 302 compliant TSoIP outputs per demod
  • 8 channels (MPTS/SPTS) via IP (RTP, optional: UDP Unicast/Multicast)
  • Optional IP FEC encoding in output stream
  • Advanced RDS (Radio Data System) and RBDS (Radio Broadcast Data System) decoder and processor
Block DiagramBlock Diagram

Specifications

RF Inputs
Tuner8 FM tuner
Connector4x F-Connector
Impedance75Ω
Frequency RangeWorldwide FM band :76 – 108MHz
Worldwide FM-HD Band87.5 – 108MHz
Frequency Step10kHz minimum
Tune Time
FM Mode1.5ms Typical
AM Band15ms Typical
Seek/Tune Time
FM ModeMaximum 60ms/ch
FM-HDMaximum 120ms/ch
Maximum Signal Power
FM Mode25-112dBuV typical
FM-HD Mode25-93dBuV typical
Return Loss> 15dB
IP3
FM Mode96dBuV typical, 90dBuV minimum
FM-HD Mode91dBuV typical
Audio Sensitivity
FM Mode0.7dBuV typical, 1dBuV maximum
FM-HD Mode6dBuV typical, 17dBuV maximum
RDS Sensitivity
FM Mode4dBuV typical
FM-HD Mode6dBuV typical
L/R Imbalancefrom -1 to 1dB at 75kHz deviation
Adjacent Channel Selectivity±200kHz
FM Mode50dB typical, 35dB minimum
FM-HD Mode37dB typical
ASI Outputs
ConnectorMini DIN 1.0/2.3
Number of Connectors2
TSoIP Output
ConnectorRJ45, 10/100/1000Mbps
TypeSMPTE 302 over IP
Control
  • SNMP over Ethernet via FC
  • Web browser via FC
Monitored parameters
  • Channel stability
  • Frequency offset
  • RSSI
  • SNR
  • RDS and service text
Electrical
Voltage+12V DC
Power< 24 watts
EMI/RFIComplies with FCC Part 15
Class A EU EMC Directive
Optional SMTPE2022-1 FEC encoding with L&D following the following range:
• L*D ≤ 100
• 1 ≤ L ≤ 20
• 4 ≤ D ≤ 20
• if L < 4, then D = 4 always

Ordering Information

7880DM8-FM4-IPEight Channel FM/FM-HD demodulator with Four RF inputs, ASI and IP output
Ordering Options
NotesRear plate must be specified at time of order - eg: [model]+3RU
+B7575Ω, BNC connector for RF input
+FECForward Error Correction Capability for IP output (for -IP and -IPASI models)
Rear Plate Suffix
+3RU3RU rear plate for use with 350FR, 7800FR, 7800FR-QT, 7801FR or 7801FR+IRDCP Multiframes
Enclosures
350FRPortable Multiframe which holds 7 single slot modules
7800FR3RU Multiframe which holds 15 single slot modules
7800FR-QT3RU Quiet Multiframe which holds 15 single slot modules
7801FR1RU Multiframe which holds 4 single slot modules
7801FR+IRDCP1RU Multiframe with front control panel installed
Accessories
+781PSRedundant power supply (optional)
7801FCFrame controller module for use with 7801FRs