Comtech EF Data CDM-550T User Manual
Page 24
CDM-550T Satellite Modem
Revision 3
Introduction
MN/CDM550T.IOM
1–4
Firmware update notes:
• Version 1.33 has added a new timed Diversity Switch operating mode.
(Note: Please contact CEFD Customer Service for further infomation on the operation
and use of this mode.)
• Version 1.24 has added new Turbo Code Rate – Rate 1/2 QPSK
• Version 1.20 firmware has added KST-2000 ODU capability
• Version 1.19 firmware has added new Turbo Code Rate – Rate 3/4 OQPSK
• Version 1.15 firmware has added two new Turbo Code Rates - Rate 21/44 and Rate 5/16
- both operating in BPSK only.
(Note: If you do not have Version 1.15 or higher installed in your CDM-550T, contact
the factory for a free upgrade)
• Version 1.10 firmware incorporates the following features:
1. Link performance statistics logging. A second log has been added (independent of the
stored events log), where the user can choose to record link performance statistics at
regular intervals. Parameters which are recorded include minimum and average
values of Eb/No, and maximum and average values of Transmit power level increase,
if AUPC is being used.
2. Receive/Transmit Inhibit (RTI) which permits the user to stop a remote site from
bringing up its transmit carrier until its demodulator is correctly locked.