Datum Systems PSM-500 - Table 3-7. Demodulator Parameter Detail

Operation PSM-500/500L/500LT SCPC Satellite Modem
Page 3-20 PSM-500/500L/500LT - Rev. 0.91
Table 3-7. Demodulator Parameter Detail
Demodulator Parameter Detail
Representation
Type
Entry
Description
Status Carrier
Locked, OK
Read Only N/A Demodulator receive Carrier
Status
Status Eb/No
4.7dB
Read Only Measured by internal
circuitry.
Measured Eb/No
Status Offset
–8.031kHz
Numeric Within +/– Narrow
Acquisition Range
Receive carrier offset
frequency. An entry will reset
to 0 after search time has
elapsed.
Status Level
–52.4dBm
Read Only N/A Receive carrier level
Status Est. BER
2x10^–7
Read Only
Resettable
Press “0” or “Edit” and
“Enter” to restart.
Estimated Bit Error Rate
Status SER
3.37x10^–2
Read Only
Resettable
Press “0” or “Edit” and
“Enter” to restart.
Measured Symbol Error Rate
Status Buffer
100%
Read Only
Resettable
0 = Reset Slip (Flag)
1 = Re-center
FIFO Buffer status in percent
fill. Only visible when Demod
Data clock source is not set to
“RCV Clock”. The “slip” flag
tells when the FIFO
automatically re-centered.
Status Test
Normal
Read Only N/A Demodulator Test Status
IF Frequency
70.000000MHz
Numeric 50.000 000 to 90.000 000
MHz
950 000 000 to 1900 000
000 MHz for L-Band unit
Carrier center frequency.
L-Band frequency shown if
LNB LO is set to 0, else is set
to RF frequency.
IF Sweep Range
+/-30.000kHz
Numeric +/–0.1 to +1,250.000 kHz Carrier Acquisition Range in
kHz.
IF Sweep Mode
Fast
Selection 0 = Fast, 1 = Search Fast Acquisition mode is
standard method
»IF Sweep Time
10.0 Sec
Numeric
0.0 to 600.0 Seconds.
0 Disables Narrow Sweep
Narrow Sweep time
applicable to Search sweep
mode only.
IF Modulation
QPSK
Selection 0 = BPSK, 1 = QPSK,
2 = OQPSK, 3 = 8PSK,
6 = 16QAM
Modulation Mode. Some
values left available for new
options.
IF Spectrum
Normal
Selection 0 = Normal, 1 = Inverted Modulation Spectrum control
IF Filter Mask
Normal
Selection 0 = IESS, 1 = Legacy Modulation Spectrum Filter
Control. Legacy for PSM-4900
compatibility.