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PSM-500/500L/500LT SCPC Satellite Modem
1.1.2 Modem Feature Set Variations
Feature sets are specific capabilities that suit a modem for a particular purpose. The PSM-500
series is the first modem Datum Systems has offered with variable feature sets. The advantage is
that a customer does not have to pay for features he does not use, but later features can be
upgraded in the field electronically by adding new firmware Intellectual property to the modem. The
user has the best of both worlds. Feature sets are purposely kept to a minimum to make their control
easy and therefore reduce the cost. There are currently only 3 main feature sets offered for the
PSM-500 series, and they apply to any of the IF variations.
For comparison, the features available in the PSM-4900 modem are also shown. More detail on
maximum and minimum data rates are shown in Appendix A.
Feature
Modulation
BPSK
QPSK
OQPSK
8PSK/QAM
16QAM/APSK
Max Data Rate
BPSK
QPSK/OQPSK
8PSK/QAM/TCM
16QAM/APSK
FEC Modes
Disabled
Viterbi
Reed-Solomon
TPC – 4K (2)
TPC – 16K
LDPC-16k (2k)
IBS Mux/AUPC
SnIP Ethernet Int.
There are multiple items lists as "Options". Options are specifically hardware items that are installed
in the modem, while a "feature" is a software installation listed as an "upgrade". To upgrade the
modem from one feature set to another refer to the instructions in Section 4.4.
PSM-500/500L/500LT - Rev. 0.91
PSM-500 Series Feature and Option Matrix.
Original M5
PSM-4900
M505
N/A
N/A
Upgrade
N/A
Upgrade
M523 rates slightly higher at higher FEC rates. See Notes below.
2.46 Mbps
2.5 Mbps
4.92 Mbps
5 Mbps
N/A
N/A
N/A
Option
Option
Option
N/A
Option
N/A
Option
Option
Option
Option
PSM-500S/N/L/LT Series
M511
Upgrade
5 Mbps
10 Mbps
N/A
10 Mbps
N/A
N/A
Option
Option
Option
Option
Description
M523
7.38 Mbps
14.76/28 Mbps
29.52 Mbps
29.52 Mbps
Option
Option
Option
Option
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