Quantum series, Paired carrier modem schematic, Paired carrier – Paradise PD60SL User Manual
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207822 REV A ECO 15932
Quantum Series
PD60S & PD60SL Modem Redundancy Switch
Paired Carrier Operation
Paired Carrier
Disabled
Paired Carrier
Enabled
Can save 50%
on space segment
Paired Carrier
Parameter
QUANTUM Series Switch
Paired Carrier
Transmit and receive carriers are overlaid on top of
each other in the same space segment. Echo
cancellation techniques are used in the demodulator
to cancel the transmit carrier and extract the wanted
receive carrier signal .
Paired Carrier
data rate options
512kbps, 1024kbps, 2.5Mbps, 5Mbps, 10Mbps,
15Mbps, 20Mbps, 25Mbps, 40Mbps, 50Mbps
and 60Mbps traffic rate
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.
PAIRED CARRIER MODEM SCHEMATIC
Possible modes
SCPC DVB-S2
Description
FastLink 8QAM
z
FastLink 8QAM requires FastLink LDPC
8PSK
Including TCM
z
Rate 2/3 8PSK Pragmatic TCM to IESS 310
8PSK Turbo available - requires 2nd Generation Turbo FEC option
16QAM
z
16QAM - requires either 2nd Generation Turbo FEC option or LDPC option
IBS / SMS
z
z
Satellite Framing to IESS 309 with low rate Intelsat ESC (to IESS 403) & High Rate IBS/SMS ESC
Audio Channels
z
z
P1348 Emulation mode for IBS 64kbps carrier (2xaudio) or 128kbps (2xaudio + 64kbps data) - requires IBS / SMS & IDR options
Drop / Insert
including Extended D/I
z
z
T1/E1 linear order Drop/Insert, plus independent timeslot re-ordering on Tx & Rx. Signalling (E1 CAS & T1 RBS). Rx Partial Insert for multi-destinational working,
Timeslot ID maintenance for N=1 to 31 with IBS / SMS or Closed Net plus ESC. Drop/Insert can operate with any interface, although G.703 is typically used
(requires G.703 option if used in G.703 mode)
G.703 Clock Extension
z
z
Provides a stable G.703 E1 or T1 reference clock over satellite when traffic is NOT E1 or T1
Advanced AUX
z
z
Variable rate synchronous Aux channel for IBS / SMS - requires IBS / SMS option
IDR 32/64kbps in place of one/both audio ADPCM ESC channels - requires IDR option
Custom
z
z
Custom RS Outer Codec values of n, k and interleaver depth. Custom IBS / SMS modes, allocation of overhead between ESC and Aux channels in IBS / SMS, custom backward alarms in
IBS / SMS, and Closed Net plus ESC - requires IBS/SMS option. Custom IDR mode - requires IDR option.
EZ BERT - PRBS Tester
z
z
Internal Bit Error Rate Tester (BERT) can run through main data channel, or ESC/Aux channels, or output/input via the terrestrial interface
OM-73
z
OM-73 Scrambling, symbol mapping and Viterbi compatibility
48V DC Input
z
z
48V DC Primary power input in place of 100-240V AC input (hardware option)
Adaptive Signal Predistorter
z
Use with 16QAM to relax HPA backoff by up to 1.6dB. Compensates for HPA non-linearities in ground segment and/or transponder. Requires 16QAM option.
Tx Only operation
z
z
Transmit functions only
Rx Only operation
z
z
Receive functions only
Paired Carrier (carrier
re-use) subject to prevailing
modem data rate limits.
Minimum occupied band-
width limit of 150kHz, and
maximum occupied bandwidth
limit of 36MHz
z
z
Paired Carrier Ready, allows carriers to be overlapped thereby reducing the required satellite bandwidth.
(hardware option) - requires additional cumulative software options below depending upon data rate required
z
z
Paired Carrier up to 512kbps traffic rate - requires Paired Carrier Ready option
z
z
Extends Paired Carrier up to 1024kbps traffic rate - requires 512kbps option
z
z
Extends Paired Carrier up to 2.5Mbps traffic rate - requires 1024kbps option
z
z
Extends Paired Carrier up to 5Mbps traffic rate - requires 2.5Mbps option
z
z
Extends Paired Carrier up to 10Mbps traffic rate - requires 5Mbps option
z
z
Extends Paired Carrier up to 15Mbps traffic rate - requires 10Mbps option
z
z
Extends Paired Carrier up to 20Mbps traffic rate - requires 15Mbps option
z
z
Extends Paired Carrier up to 25Mbps traffic rate - requires 20Mbps option
z
z
Extends Paired Carrier up to 40Mbps traffic rate - requires 25Mbps option
z
z
Extends Paired Carrier up to 50Mbps traffic rate - requires 40Mbps option
z
z
Extends Paired Carrier up to 60Mbps traffic rate - requires 50Mbps option