SCT2x4 PLUS Module

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Product Detail

The SCT2x4 PLUS is a Satellite-to-Cable Transcoder system designed for the HITS (Headend-in-the-Sky) satellite service. Each SCT2x4 PLUS module contains two independently controlled satellite tuners with input frequency ranges of 950-2150 MHz. This unit is specifically designed for 8PSK transponders using DVB-S2 error correction. Due to the high overall bitrate on HITS 8PSK transponders, all of the programs contained within them cannot be accommodated in a single QAM 256 channel. The SCT2x4 PLUS automatically directs programs across two QAM channels based upon the transponder selection. SAT 1’s programs are directed to QAM1 and QAM 2 while SAT 2’s programs are directed to QAM3 and QAM 4. The four (4) output QAM channels can be grouped in any 42 MHz contiguous bandwidth in the frequency range of 54-864 MHz.

The SCT2x4 PLUS does not alter the satellite encryption used on the program streams. The encrypted streams pass intact through the transcoder and are delivered to the QAM set top boxes where the actual descrambling occurs. The SCT2x4 PLUS may be monitored and controlled via GUI-based web pages from any computer locally or via the internet.


The data rates are such that when the satellite transmissions are 8PSK with DVB-S2 FEC, the programs from two transponders will usually require four QAM output channels if all programs are selected. Four high performance QAM modulators, with up to + 55 dBmV output level per QAM, after combining of the 4 QAMs, are included.

  • Supports HITS 8PSK transponders with DVB-S2 FEC
  • Equipped with an integrated automatic satellite switch that allows operator to select inputs from 2 different satellites
  • Supports ITU-T J.83B QAM 256 output
  • Compact design allows for deployment of 4 transcoder modules (8 transponders/16 QAM), including the power & control module, in 3RU
  • GUI-based menu, including SNMP-based management, provides remote monitoring/control capabilities

NOTE: The SCT2x4 PLUS requires the use of a PSM-4 module for operation.

Spec Sheet | Quick Guide | User Manual | Product Firmware Updates


Technical Data And Specifications

SCT2x4 PLUS Satellite to Cable Transcoder Module 1002655
INPUT (Specs are per SCT2x4 PLUS)
Connector: 2x “F” Female
Standards:  8PSK (DVB-S2)
Symbol Rate:  Variable; 5 to 33 MSymbols/sec (Mbaud)
Frequency Range:  950 to 2150 MHz
Frequency Granularity:  1 MHz
Bandwidth:  Variable, up to 36 MHz
Capture Range:  ± 5 MHz
Code Rate:  Auto Detect; 3/5, 2/3, 3/4, 5/6, 8/9, 9/10
Forward Error Correction (FEC):  DVB-S2
Input Level:  -65 to -20 dBm
Impedance:  75 Ω
Return Loss:  Greater than 9 dB
OUTPUT (Specs are per SCT2x4 PLUS)
Connector: 1x “F” Female (4x RF QAM channels combined)
Modulation: QAM256
Standard ITU-T J.83B
DVB Symbol Rate: Variable; up to 7 MSymbol/sec (MBaud)
Frequency Range: 54 to 864 MHz
Tuning: CATV Channel Selectable (CH. 2 to 135)
Channels’ Bandwidth: 4x 6 MHz in any 42 MHz-wide spectrum
RF Level: +40 dBmV ±1 dB
RF Level Adjustment Range: +32 to +42 dBmV, 1 dB increment
Frequency Tolerance: ± 0.5 kHz @ 77°F (25° C)
Frequency Stability: ± 5 kHz over 32° to 122° F (0 to 50° C)
Amplitude Flatness: ± 0.25 dB (over 6 MHz channel)
Phase Noise: -95 dBc (@ 10 kHz)
Spurious: -60 dBc
Broadband Noise: -70 dBc (@ +40 dBmV output level, 5.5 MHz bandwidth)
Impedance: 75 Ω
Carrier Supression: 45 dB
Return Loss: 14 dB typical
Signal-to-Noise Ratio (SNR): Greater than 40 dB typical
MER: Greater than 39 dB typical
I/Q Phase Error: Less than 1 degree
I/Q Amplitude Imbalance: Less than 1%
GENERAL (Specs are per module or chassis)
Dimensions (W x D x H):
SCT2x4 PLUS Module: 3.0 x 10.6 x 5.25 inches (38 x 270 x 134 mm)
PSM-4 Power Supply Module: 4.5 x 10.6 x 5.25 inches (114 x 270 x 134 mm)
QTRC Rack Chassis: 19 x 12.0 x 5.25 inches (483 x 305 x 134 mm)
Power: 105 to 240 VAC; 50/60 Hz
Power Dissipation: SCT2x4 PLUS Module: 21W
SCT2x4 PLUS Module: 1.7 lbs (0.77 kg)
Fully-loaded Rack Chassis: 28 lbs (12.7 kg)
Operating Temperature: 32 to 122 °F (0 to 50 °C)
Storage Temperature: -13 to 158 °F (-25 to 70 °C)
Operating Humidity: 0 to 95% RH @ 35 °C max, non-condensing
Storage Humidity: 0 to 95% RH @ 35 °C max, non-condensing
ALARMS/MONITORING/CONTROL (Specs are per module)
SCT2x4 PLUS Module: Status (Green LED)
PSM-4 Power Supply Module: Power and Status (Green LED)
Remote Monitoring/Control: GUI-based Menu via web browser

Specifications, price, and availability are subject to change without notice or obligation.