Quantum and Evolution Series Installation and Operating Handbook
13-1
Chapter 13 Specification Summary
13.1 Common Main Specifications
Parameter
Modem
Modulation Scheme
BPSK, QPSK, OQPSK, 8PSK (Option), 16QAM (Option)
IF Frequency Range
50-90MHz and 100-180MHz
L-band Frequency
Range
950 – 1950 MHz (note: an extension to 2050MHz is
available as a SAF feature)
Frequency Resolution
100Hz
Traffic 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
LVDS 25 pin female D-type (Option)
HSSI 50 pin SCSI-2 type connector
G.703 balanced on EIA530
G.703 unbalanced on BNC female 75
Ω
User Traffic Data Rate
Note: all data rates are modem specific – see
datasheets for specific modem data rates.
4.8kbps – 2Mbps
Extends base operation to 5Mbps
Extends 5Mbps to 10Mbps
Extends 10Mbps to 20 or 25Mbps
Extends 25Mbps to 55Mbps
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
– Closed Network
4.8kbps to 10Mbps (PD10), 20Mbps (PD20), 25Mbps
(PD25) or 55Mbps (PD55) 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
Used with IBS/SMS satellite framing and IDR Options
to provide 2 x 32kbps audio ADPCM coded channels
within a 64kbps IBS carrier and 2 x 32kbps audio
ADPCM coded channels plus 64kbps data within a
128kbps IBS carrier
