Paradise PD20 Quantum Series DVB-S2 IF Modem

Paired Carrier Operation (optional)
Data Rate options to 20 Mbps
Supports up to two Quad E1 cards
DVB-S2 FEC and modulation support

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PD20 Quantum Series DVB-S2 IF Modem

The QUANTUM Series PD20 DVB-S2 IF Modem brings the bandwidth saving and robustness benefits of DVB-S2 to traditional SCPC services such as IBS and Drop & Insert. Paired Carrier technology overlays transmit and receive carriers reducing satellite bandwidth by up to 50%. Paired CarrierTM technology is patented by Viasat Inc. QUANTUM modems are fully backward compatible with Paradise Evolution modems when DVB-S2 and Paired Carrier are disabled.

SCPC features, DVB-S2 Space Segment

Modes of operation:

DVB-S2 outbound with SCPC return,
or SCPC outbound with DVB-S2 return.
DVB-S2 outbound and return.
SCPC outbound and return.
SmartLink mode where Tx/Rx SCPC
features are combined with DVB-S2
space segment savings. All traditional
SCPC features are supported including
IBS, IDR, ESC, Drop & Insert, AUPC, etc.

PD20L Features

Data rate options to 20Mbps, 10Msymbol/s maximum.
All the standard features and options of the Evolution Series Modem including IBS, IDR, Drop & Insert, etc.
DVB-S2 FEC and modulation support.
Paired Carrier ready. Requires just an upgrade.
Ethernet plus a further 3 x traffic interfaces supporting a wide range of terrestrial interfaces.
Supports up to two Quad E1 cards allowing up to 8 x E1s to be multiplexed onto a single carrier
Available in IF, L-band, and IF plus L-band.

Unique Web User Interface provides full Monitor & Control plus graphing of Eb/No, BER, Receive Power and other operating parameters, plus a Receive Spectrum Analyser, Receive Constellation Monitor and BER Tester for detailed signal analysis and performance validation via Internet Explorer. Logged graph data can be sent via email to any email address.

Paired Carrier Modem Schematic

Paired Carrier technology allows both the uplink and downlink signals to occupy the same space segment. An adaptive self-interference cancellation technique removes the uplink signal components generated by the local terminal from the received signal off satellite, allowing demodulation of the far end signal.

	Built-in Spectrum Analyser for Receive Carrier, Adjacent Carrier and Super-Wide Monitoring (3 bandwidth settings).
Built-in Receive Constellation Display for channel diagnostics.
	Simple to use EZ-BERT BER Tester Option allows real time bit error measurements through traffic or ESC channel, or between the terrestrial ports.

Common Main Specifications
Modulation Scheme	SCPC: BPSK, QPSK, OQPSK, 8PSK (Option), 8APSK (Option), 16QAM (Option) DVB-S2 (Option): QPSK, 8PSK, 16APSK
L-Band Frequency Range	950 - 1950MHz
L-Band Frequency Resolution	100Hz
L-Band Interface - Electrical	Ethernet (10/100 BaseT) IP Traffic on RJ45 with link and traffic indicators. Electronically selectable with other interfaces fitted.
Traffic Interface - Options	RS422 including X.21 DCE and DTE emulation, V.35 and RS232 on EIA530 connector 25 pin female D-type (Option), EIA530 maximum 10Mbps, RS232 max 100kbps Serial LVDS 25 pin female D-type (Option) HSSI 50 pin HD SCSI-2 connector (Option) G.703 balanced on EIA530 G.703 unbalanced on BNC female 75O Quad E1 G.703 balanced on RJ45 IP Traffic card 10/100/1000 BaseT on RJ45 Eurocom D/1 on 25 pin male D-type includes: Eurocom D <16kbps to >2,048kbps AMI coded Eurocom C 256kbps, 512kbps, 1,024kbps and 2,048kbps HDB3 coded, plus Eurocom G 16kbps or 32kbps diphase coded MultiMux feature allows a mix of multiple G.703 interfaces plus IP and/or EIA530 traffic with a limit of 2,048kbps per MultiMux traffic port (4 x ports max)
User Traffic Data Rate	SCPC: 4.8kbps - 2,048kbps in base Modem DVB-S2 50kbps - 2,048kbps in base Modem, subject to minimum symbol rate of 100kbps Extension of base operation to 5Mbps (Option) Extension of 5Mbps to 10Mbps (Option) Extension of 10Mbps to 20Mbps (Option) Extensions are cumulative
User Traffic Data Rate Resolution	1bps
Note: The combination of FEC Rate, Modulation scheme and Satellite Overhead limits the Traffic Data Rate Range in all modes.
User Data Rate Range - Clsed Network	4.8kbps to 20Mbps no Satellite Overhead (with high Data Rate options)
User Data Rate Range - Minimum Overhead (Closed Network plus ESC)	As Closed Network above except limits inclusive of overhead of approximately 1.4 times the ESC baud rate. Resolution of 1bps. Supports ESC rate from 110 baud to >38.4kbaud.
User Data Rate Range - IBS/SMS Option	4.8kbps to 10 Mbps (6.7% Satellite Overhead added). Resolution of 1bps.
User Data Rate Range - IDR Option	4.8kbps to 10 Mbps (96k overhead added) Resolution of 8k (limitation of frame structure)
Audio Channels Option (P1348 Emulation mode)	Used with IBS/SMS satellite framing and IDR Options to provide 2 x audio 32kbps ADPCM coded channels within a 64kbps IBS carrier, and 2 x audio 32kbps ADPCM coded channels plus 64kbps data within a 128kbps IBS carrier
Inner Forward Error Correction	Viterbi BPSK/QPSK/OQPSK - Rates 1/2, 3/4, 7/8, k=7 to IESS-308/309 Option: Sequential BPSK/QPSK/OQPSK - Rates 1/2, 3/4, 7/8 up to 2,048kbps maximum Option: TCM 8PSK - Rate 2/3 to IESS-310 Option: TPC BPSK - Rates 5/16, 21/44, 0.493 (Paradise), 2/3, 3/4, 0.789 (Paradise), 7/8 (Paradise), Rate 7/8 de facto Option: TPC QPSK/OQPSK - Rates 5/16, 21/44, 0.493 (Paradise), 2/3, 3/4, 0.789 (Paradise), 7/8 (Paradise), Rate 7/8 de facto, Rate 0.93 (Paradise) Option: TPC 8PSK - Rates 3/4 de facto, 7/8 de facto, Rate 0.93 (Paradise) Option: TPC 16QAM - Rates 3/4 de facto, 7/8 de facto, Rate 0.93 (Paradise) Option: DVB-S2 LDPC/BCH Short FECFRAME=16.2k QPSK/ - Rates 1/2, 2/3, 3/4, 8PSK/8APSK - Rates 2/3, 3/4, 16QAM - Rate 3/4
Outer Forward Error Correction	Concatenated Intelsat Reed-Solomon Outer Codec to IESS308/310 with Custom Option offering variable code rate. Maximum traffic rate 10Mbps.
Scrambling - IBS/SMS Opton	Synchronised to framing per IESS-309 up to 10 Mbps
Scrambling - IDR Option and Closed Network	With RS Coding: synchronised to RS overhead. Without RS Coding and Non-TPC FEC: V.35 self synchronising No RS Coding with TPC FEC: 2⊃12-1 up to 10 Mbps
Scrambling - SCPC Closed Network Plus ESC	32kbps or above: synchronised to ESC overhead. Less than 32kbps: as per closed network. V.35 Scrambler has CCITT, Intelsat, “FDC” and “Linkabit” modes up to 20Mbps (with high Data Rate options)
Scrambling - DVB-S2	As per ETSI EN 302307
L-Band Connector Type	N type female
L-Band Impedance	50Ω
Return Loss	14dB typical
Internal Frequency Reference - Ageing	4E-8/yr
External Reference	Clocking Only: 1-10MHz in 1kHz steps. Clocking and RF Frequency: 10MHz, 0dBm±1dB
BER Performance - Guaranteed dB (Typical)

Modulator Specifications
Output Power Level	-5 to -30dBm Continuously Variable in 0.1dB steps
Output Level Stability	±0.5dB, 0ºC to 40ºC
Phase Accuracy	±2º maximum
Amplitude Accuracy	±0.2dB maximum
Carrier Suppression	-30dBc minimum
Output Phase Noise	As IESS-308, nominally 3dB better
Output Frequency Stability	4E-8/yr
Harmonics	Better than -55dBc/ 4kHz in band
Spurious	Better than -55dBc/ 4kHz in band
Transmit On/Off Ratio	55dB minimum
External Transmit Inhibit	By external contact closure or by TTL signal applied to rear panel Alarms & AGC connector
Adaptive Signal Predistorter	Option: Use with 16QAM to relax HPA backoff by up to 1.6dB. Compensates for HPA non-linearities.
Demodulator Specifications
Input Range Wanted Signal	Minimum level -130dBm + 10 log symbol rate Range 50dB above min, limited to -20dBm max
Maximum Composite Signal	30dB above level of desired input up to a maximum of -10dBm
Frequency Acquisition Range	Selectable from ±1kHz to ±32kHz up to 10 Msps (1kHz steps) ±10kHz to ±250kHz above 10 Msps (10kHz steps)
Acquisition Threshold	<5dB Es/No QPSK
Acquisition Time	At 9.6kbps, less than 1s at 6dB Es/No QPSK At 10 Mbps, less than 100ms at 6dB Es/No QPSK
Clock Tracking Range	±100ppm minimum
Receive Filtering Selectable	Intelsat IESS compliant a = 0.35, a = 0.25, a = 0.20
Performance Monitoring	Measured Eb/No (range 0-15dB, ±0.2dB). Measured Frequency Offset (100Hz resolution). Wanted signal level strength indicator centred on the middle of the Rx Input range.
AGC Output	Buffered direct AGC output for antenna tracking, etc.
See Datasheet for more Specifications

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What to Expect

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