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DVB-S/S2 (8PSK, QPSK) to 2xDVB-T (COFDM) Transmodulator: TERRA TDX-420C (2xCI)
Code: R81619
Price w/o taxPriceDisc.Validity  
488.03 EUR488.03 EUR0 %
4-year warranty
IPTV Streamer: TERRA sdi 480 (DVB-S/S2 to IP, USB port)
IPTV Streamer: TERRA sdi 480 (DVB-S/S2 to IP, USB port)
IPTV Streamer: TERRA sdi 480 (DVB-S/S2 to IP, USB port)
Views of the DVB-S/S2 (8PSK, QPSK) to 2xDVB-T (COFDM) TDX-420C R81619 transmodulator
IPTV Streamer: TERRA sdi 480 (DVB-S/S2 to IP, USB port)
View of the TDX-420C R81619 transmodulator with two inserted CAMs decoding encrypted channels
IPTV Streamer: TERRA sdi 480 (DVB-S/S2 to IP, USB port)
View of the included accessories - wall mount, distance lath, RF bridge, termination load resistor
Key features
  • conversion of DVB-S/S2 signals to DVB-T COFDM standard,
  • conversion of multiple signals from two satellite transponders to 2 neighboring DVB-T multiplexes,
  • possibility to create one DVB-T multiplex from two different satellite transponders,
  • selectable channels and services,
  • easy control via RJ-45 port,
  • two CI ports (multi-channel descrambling of pay-TV)
  • management via the Internet,
  • access to event history (logs),
  • automatic gain control (AGC).
Terra TDX-420C R81619 DVB-S/S2 to DVB-T transmodulator is used for reception of DVB-S/S2 (8PSK/QPSK) signals, selection of desired channels and retransmission of them in COFDM format in chosen RF channels in VHF/UHF frequency range. The device allows the user to receive and manage a range of free to air and encrypted satellite channels (CI/CAM compatibility). One TDX-420C R81619 panel can receive channels from two satellite transponders and convert them into two neighboring DVB-T multiplexes with maximum throughput of 31.66 Mbps (no PID filtering). In practice, each multiplex can carry 6 SD channels or 2-3 HD channels. The administrator of the system selects the required channels from the satellite streams and forms two DVB-T multiplexes. Alternatively, one DVB-T multiplex can be programmed from channels coming from two different satellite transponders. In each case, it is neceeesary to remember about 10% safety margin when determining the maximum bit rate for the whole multiplex (typically the ultimate bit rate of a multiplex should not exceed 29 Mbps). When a higher throughput is required, the system should be equipped with additional TDX-420C R81619 unit(s). The output DVB-T COFDM multiplexes are usually distributed to users by a passive network composed of RF splitters/taps. Such a solution is especially convenient in modern hotel TV systems distributing a variety of satellite channels, including HD broadcasts.
Thanks to RJ-45 Ethernet port, the programming of the TDX-420C R81619 panel is performed via a web browser.
The TDX-420C R81619 panel has two CI slots that in the case of receiving encrypted programs must be equipped with suitable conditional access modules (CAM) with dedicated smart cards.
A great advantage of the Terra device is easy integration with other components:
Customers can also order DVB-S/S2--> DVB-C (QAM) transmodulators:
  • DVB-S/S2 (8PSK, QPSK) to 2xDVB-C (QAM) Terra TDQ-420C R81639 (two CI slots)
  • DVB-S/S2 (8PSK, QPSK) to 2xDVB-C (QAM) Terra TDQ-420 R81638
DIPOL offers the following transmodulators of DVB-S/S2 (8PSK, QPSK) signals:
 TDX-410C TDX-420  TDX-420CTDQ-420  TDQ-420C
  R81617 R81618R81619 R81638 R81639 
Code R81617 R81618R81619 R81638 R81639 
Input signals
Number of transponders
Output signals
Number of MUXes
Max. bitrate [Mb/s] 31.662x31.662x31.662x532x53
CI slot(s)
The R81619 units can be mounted on the R82538 or R82539 DIN rail (also in a RACK cabinet) and powered from DR-60-12 R82532 or UP413 R82533 power supply.
View of the information window of TDX-420C R81619 module
(among others DVB-S2 input RF levels, SNR, VBER parameters)
IPTV Streamer: TERRA sdi 480 (DVB-S/S2 to IP, USB port)
Selection of channels and filtration of services
IPTV Streamer: TERRA sdi 480 (DVB-S/S2 to IP, USB port)
With these parameters, the maximum bandwidth of each of the two DVB-T multiplexes
is 31.66 Mbps, in compliance with the DVB-T standard
The use of the output bitrates
Set of ttx410C R81615 and tdx410C R81617 transmodulators used in an SMATV system. For the reception of pay-TV channels it is necessary to install suitable conditional access module.
Notice: The transmodulator is compatible only with CI CAM modules (no support for CI+).
Code R81619
Number of supported transponders
RF input
Frequency range [MHz]       950 - 2150
Power for an LNB / Control0/14/18 V, max 300 mA / DiSEqC 1.0, EN50607, EN50494
Level/Impedance [dBμV / Ω] 45 - 85 / 75
Loop through gain [dB] -1 ±1
ModulationQPSKQPSK, 8PSK, APSK 8/16/32
Symbol rate [Ms/s] 2...452...45
FEC 1/2, 2/3, 3/4,
5/6,  7/8
 QPSK: 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
Roll-off coef. [%]3520, 25, 35
RF output
Frequency range [MHz] 100...858 (100 kHz step)
Level/Impedance [dBμV / Ω] 90 ±2 / 75
Spurious level [dB] < -60
Loop loss [dB] ≤ 2.5 dB
MER ≥ 38 dB (100-780 MHz), ≥ 35 dB (780-860 MHz)
ModulationQPSK, QAM16, QAM64
Channel width [MHz]7/8
Guard interval
 1/4, 1/8, 1/16, 1/32
FEC1/2, 2/3, 3/4, 5/6, 7/8 
FFT mode
Output level adj. [dB] 0...-15 (step 1)
Transport stream parameters
Max. bitrate [kb/s]31660
Max. number of PIDs no filtering
Other specs
RF loop (frequency range/loss)47-862 MHz / ≤ 2.5 dB
Ethernet portIEE802.3 10/100 Base-T (RJ45)
Power [V / A]12 / 0.55
Oper. temperature range  [ºC] 0...50
Dimensions [mm] / Weight [kg] 48.5x198x112 / 0.9


Price w/o taxPriceDisc.Validity  
488.03 EUR488.03 EUR0 %
DVB-S/S2 (8PSK, QPSK) to 2xDVB-T (COFDM) Transmodulator: TERRA TDX-420C (2xCI)
Code: R81619