EN-40 SD MPEG2 and MPEG4 DSNG Encoder
EN-40 SD MPEG2 and MPEG4 DSNG Encoder
The EN-40 DSNG encoder/modulator supports standard definition MPEG 2 and MP...
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SMD-989 Modulator

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SMD-989 Modulator

The SENCORE SMD 989 DVB-S/S2 professional modulator is ideal for single or multi-stream MPEG Transport Stream modulation. Leveraging the latest modulation technology, the SMD provides high-value solution with unmatched signal quality.

Multistream support with Variable Coding and Modulation (VCM) ensures the SMD will be ready for the future of S2 modulation, and a complete web GUI provides legendary Ease of Use.

The optional, built-in L-Band upconverter enables the SMD 989 to provide an IF or L-band output. This eliminates the need for multiple pieces of equipment and provides a compact solution for facilities housing multiple modulators or for insertion into L-band inter-facility links.

The chassis has two bays allowing for a variety of configurations, including two independent modulators for density, redundant power supplies for reliability, or DC BUC power for portable applications.



  • Two-bay chassis to support a variety of options
  • Ability to modulate 1 to 6 multistream transport streams on a single carrier (single-box multistream solution)
  • L-band and IF outputs
  • L-band monitoring output
  • Optional diplexed 10MHz and DC power onL-band
  • ASI and IP inputs
  • Front panel and web GUI for easy configuration
  • ASI and IP inputs
  • Available with dual, redundant power supply


Technical Specifications


Automatic failover and failback between any two inputs
Triggered on transport stream sync loss

Connector: 4x BNC
Impedance: 75Ω
Packet format: Auto detect 188/204 byte
TS Bitrate: 0.5 Mbps - 160 Mbps

Capacity: 6x Transport Streams
Ports: 1 GbE port
Connector Type: RJ45 10/100/1000 - Auto Negotiating
Input Format: UDP or RTP
IP Encapsulation: 1 to 7 TS packets per IP packet
Addressing: Unicast and Multicast
IGMP Compatibility: Version 1, 2, and 3
Per TS Bitrate: 0.5 Mbps - 160 Mbps

External Reference Input: 10 Mhz/50Ω BNC
Reference Input Return Loss: >15 dB
Reference Input Level: -3dBm to 7dBm
Internal Reference: Ovenized Internal 10MHz Oscillator
Reference Output Source: Internal or Reconditioned External
Reference Output Level: +5dBm
Reference Output Return Loss: >25 dB

Modulation format & FEC rate: QPSK: 1/2, 2/3, 3/4, 5/6, 7/8 8PSK: 2/3, 5/6, 8/9 16QAM: 3/4, 7/8
Baud rate range: 0.5 - 45 Mbaud
Roll-off Factor: 0.20, 0.25, 0.30
Spectral Inversion: On / Off

Signal Format: CCM / VCM Modulation Format & FEC rate: QPSK: 1/4, 1/3, 2/5, 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10**
8PSK: 3/5, 2/3, 3/4, 5/6, 8/9, 9/10**
16APSK: 2/3, 3/4, 4/5, 5/6, 8/9, 9/10**
32APSK: 3/4, 4/5, 5/6, 8/9, 9/10**
**9/10 not applicable for short frames
Baud rate range: 0.5 - 45 Mbaud
Roll-off Factor: 0.20, 0.25, 0.30
Multi Stream Support: 1-6 transport streams per output
Spectral Inversion: On / Off
FEC Frames: Normal (64,800) / Short (16,200)


Frequency: 57-140 MHz (1 Hz steps)
Level: -30 dBm to -5 dBm (1 dB steps)
Connector: 75Ω BNC
Return Loss: >20 dB
Spurious Signal Level: -55dBc @ -10dBm

Frequency: 950-2150 MHz (1 KHz steps)
Level: -30 dBm to 5 dBm (0.1 dB steps)
Connector: 50Ω SMA
Return Loss: >15 dB
Monitoring Output: -20 dBc @ main frequency
Spurious Signal Level: -55dBc @ -10dBm

Connector: 50Ω SMA
Reference on L-Band: 10 MHz
Reference Source: Internal or external (auto detect)
Reference Level: +5 dBm
DC Power on L-Band: 24VDC @ 3.1A (optional) 48VDC @ 1.6A (optional)
DC Power Source: Integrated or external supply
DC Power Control: On/Off switching (internal supply)

Connector: RJ-45 10/100 - Auto Negotiating
Protocols: HTTP and SNMP
User Interfaces: Full control via web GUI, Full control via front panel
Automation Interfaces: Full status and control via SNMP, Configurable SNMP traps, Web services access to main GUI
Contact Closure Alarms: 2 form C relays
Connector: 9-pin sub-D female
Alarms supported: User configurable to any alarm(s)

Height: 1RU, 1.75” (5cm)
Width: 17.4” (44.2 cm)
Depth: 23” (58 cm)
Power: 100-240 AC 50/60 Hz @ 3 Amps
Supply Type: Integrated supply (standard)
Dual, hot-swappable, redundant load sharing supplies (optional)

Operating Temp: 0° to 45°C
Storage Temp: -40°C to 65°C
Relative OperatingHumidity: <95% (non-condensing)


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