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CDM-Qx/QxL Multi-Channel Satellite Modem with DoubleTalk™ Carrier-in-Carrier®
Ethernet Management
With Base selected, the nested Test page allows the user to simultaneously view the
constellations of all installed demodulators. The top image in Figure 6-12 shows such operation,
where Base
demodulator modules.
Contrast this with the bottom image in this same figure where, with Tx
functions applicable only to the modulator module are provided on this nested page – because
Constellation and Spectrum Analyzer functionality is reserved for demodulator modules, they are
not provided here.
The user may also view the constellation for either a standlone demodulator module (i.e., Rx
Test), or for the demodulator that is part of a modem group (i.e, MD
the previous page, illustrates such examples:
•
The top image depicts a configuration running independent Tx and Rx modules. The
constellation for the demodulator installed in Slot#2 is viewed by selecting the Rx icon.
•
The bottom image depicts a configuration running a grouped modem. With MD selected
from the icon quad, the nested Test page displays the constellation for the demodulator
module installed in Slot#2.
Test Mode
(Available on the Tx and MD nested Test pages) – Use the drop-down menu to select Normal, IF
Loopback, Digital Loopback, I/O Loop, RF Loopback, Tx CW, or Tx Alt 1-0. Click [Submit]
when done.
Built-in BER Tester (BERT) Generator
(Available on the Tx and MD nested Test pages) – Using the drop-down menus:
•
State – Select as OFF or ON.
•
Pattern – Select Space, Mark, 1:1, 1:3, 63, 511, 2047, 2047R, MIL188, 2^15-1, 2^20-1,
or 2^23-1.
•
10E-3 Err Ins – Select as OFF or ON.
Click [Submit] once all the parameters have been set in this section.
Built-in BER Tester (BERT) Monitor
(Available on the Rx and MD nested Test pages) – Using the drop-down menus:
•
State – Select as OFF or ON.
•
Pattern – Select Space, Mark, 1:1, 1:3, 63, 511, 2047, 2047R, MIL188, 2^15-1, 2^20-1,
or 2^23-1.
•
Sync Thres – Select as >256, Low, Mid, or High.
Click [Submit] once all the parameters have been set in this section.
BERT Results
(Available on the Rx and MD nested Test pages) – Click [Restart] or [Update] as needed. Note
that the Bit Errors and Average BER text boxes are read-only.
Test displays the constellations for this particular configuration's four installed
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Revision 7
MN/CDMQX.IOM
Test selected, test
Test ). Figure 6-13, on
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