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PSM-500/500L/500LT SCPC Satellite Modem
toward the line side. However, because of the hard wiring of the interface the pinout is fixed as a
DCE device. See Maintenance Section 4.1.2 for information on using the built-in BERT.
Why doesn't my 1:1 redundant switch on certain alarms?
The 1:1 redundancy logic is programmable on two levels. First is the <Unit: Redundcy – SW
Rqst> parameter which selects whether a switch is requested on all alarms, alarm A and/or
alarm B. If it is set to any options but "On All Alarms" then the particular alarms that are summed
into the A and B alarms are themselves programmable, creating the second level. See the
discussion in section for more information.
E. Manual
What do the abbreviations on the front panel and in the manual mean?
A good example is the display and manual representation "Redundcy SW Rqst". Unfortunately
the display does not hold enough characters to display the full text of "Redundancy Switch
Request". Following is a list of abbreviations used.
Abbreviation
1:1, 1:N, M:N
One for One, One for N and M for N. All
redundancy switch types.
ACR
Automatic Configuration Recovery
AFC
Automatic Frequency Control
AGC
Automatic Gain Control
ALC
Automatic Level Control
Alm
Alarm
Alt
Alternate
AUPC
Automatic Uplink Power Control
AUFC
Automatic Uplink Frequency Control
BER, BERT
Bit Error Rate, Bit Error Rate Test
BUC
Block Up-Converter
Cal
Calibrate
Clk
Clock
Config
Configuration
Cntst
Contrast
CXR
Carrier
Dem
Demodulator
Dif
Differential
ESC
Engineering Service Channel
Erred
Errored
FEC
Forward Error Correction
Freq, Frq
Frequency
Frmt
Format
HSSI
High Speed Serial Interface (used with routers)
IDcOff, QDcOff
I and Q channel DC Offset
I/O
Input/Output
Int'f
Interface
PSM-500/500L/500LT - Rev. 0.91
Full Text
Maintenance
Page 4-21
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