Comtech EF Data SDM-2020, Installation And Operation Manual

Page: 63 / 215

SDM-2020 Satellite Demodulator Operation
Rev. 3 3–19
SDM-2020 DEMOD
VER: X.X.X
FUNCTION SELECT
MONITOR
RAW BER CORRECTED BER EB/NO
Current Data
(Low Limit: based on
performance)
(High Limit: based on
data/code rate)
No Data
Current Corrected BER
(Low Limit: based on
performance)
(High Limit: 1.0 E-12)
No Data
Current Eb/No
(Low Limit: based on
performance)
(High Limit: 16.0 dB)
No Data
Notes:
1. A “-” indicates that no fault or
alarm exists.
2. A “+” indicates that a fault
exists, and will cause switching
in a redundant system.
3. A reversed contrast “+”
indicates an active alarm.
ACCESS TO
SUBMENU
CONDITIONAL OR
OPTION-DEPENDENT
Parameter Information
Key:
RECEIVE LEVEL
-38.3 to -70.0 dBm
(-9.26 to -63.2 dBm)
RF Card dependent
SWEEP
FREQUENCY
-500,000 TO +500,000 Hz
No Data
SWEEP RANGE
-60,000 to +60,000
No Data
(70/140 MHz)
LNB CURRENT
0 to 1000 mA
(in 1mA increments)
(L-Band only)
2047 PATTERN
NOT ENABLED
NO DATA
LOCKED
BUFFER FILL
2047 ERRORS
CURRENT STATUS
(Available with G.703
Interface.)
DISPLAYS BER
NO DATA or SAMPLING
(Available with G.703
Interface.)
EB/NO MARGIN
E/b/No MARGIN =
[Eb/No -Eb/No Threshold)
DEMOD SPECTRUM
NORMAL
INVERTED
Figure 3-8. Monitor Menu
Note: Refer to Chapter 1, Specifications for the actual operating input signal level.