3.3.6 Status–Monitor Demod
The Monitor Demod screen displays the following information.
Symbol Rate
Displays 3.0 to 33 mega-symbols per second (Msps).
Modulation
Displays the modulation type (
QPSK
,
16QAM
,
32QAM
,
64QAM
).
Note:
64QAM
is limited to 20 Msps and above.
Percent Utilization
If this number is over 98%, you should adjust the values described in
Section 3.4.6,
Determining Overall System Capacity Versus Bandwidth
and
Section 3.4.7,
Determining
Optimal Data Rate Versus Error Correction
.
Core Channel
1, 2, 3, and 4
Displays one of the following data outputs and its speed at megabits per second (Mbps).
ASI BNC-1
ASI BNC-2
ASI BNC-3
E3 BNC-1
DS3 BNC-1
DS3 BNC-2
DS3 BNC-3
E3 BNC-2
E1RJ45-1
E1RJ45-2
T1RJ45-1
T1RJ45-2
Ethernet RJ45-1
RS232
RS485
SMPTE BNC-3
Invert Spectrum
Displays
On
or
Off
for the Invert Spectrum. Note that one side must be inverted, Modulated
or Demodulated.
PRBS
Displays
On
or
Off
for the Pseudo Random Bit Sequence (PRBS).
SNR
Displays the number of dB for the signal-to-noise ratio (SNR) that measures the signal
strength and signal quality. See the table below for the signal-to-noise range.
EVM
Displays a percentage of the error vector magnitude (EVM) that measures the
performance of the radio.
The signal-to-noise range of operation is shown in the following table:
NOTE
:
Due to variations in system parameters, values will vary within this range
under 20 Msps and up-fade.
QPSK
16QAM
32QAM
64 QAM
SNR Minimum
10
17
20.5
23.2
SNR Maximum
33
33
33
33
Typical -40dBM RSL
30
30
30
30
3-4 Operating the DXL8000
DXL8000 User and Technical Manual
Summary of Contents for DXL8000
Page 45: ......
