1-6
888-2517-001
1/3/05
WARNING: Disconnect primary power prior to servicing.
eCDi ™
Section 1 Introduction
1.5.2
SNMP Agent
The SNMP (Simple Network Management Protocol) Agent in eCDi™ provides
network connectivity using the Harris Broadcast Manager (HBM). HBM is a network
manager application that allows the centralized control and monitoring of multiple
transmitters and sites, but does not come with eCDi™ . For more information on SNMP
control and the eCDi™ , see " Appendix A SigmaCD Fault and Meter Log Reference".
NOTE:
The eCDi can also be accessed by other non-Harris SNMP Network Managers. In
this case, the MIB (Management Information Base) is a common MIB that is
used by nearly all Harris transmitters. A second “Extended” MIB exists and is
exclusively used by the Harris Broadcast Manager.
1.6
Level 1 / Level 2 Functionality
eCDi™ has 2 levels of software functionality that can be used with either the Web GUI
or the SNMP connection using the HBM Network Manager:
a.
Level 1 - Transmitter Remote Status Monitoring and Control.
This allows
monitoring and control of virtually all transmitter parameters (limited to the
information that is available on the serial port of the transmitter). For most of the
listed transmitters, if it is available locally at the transmitter, it will be available
via the Web GUI. This level of functionality is included on all eCDi™ units.
b.
Level 2 (optional upgrade) - Performance Monitoring and Control
(only
available for DTV transmitters). This is an integrated form of the CD-EYE, 8-
VSB monitoring software and is an optional add-on to the base Level 1 software.
This allows performance monitoring of DTV transmitters with either CD-1A or
APEX exciters. Parameters to be monitored include:
1.
Spectral Emissions - Equivalent to a spectrum analyzer plot of the system
output. Used to confirm compliance with FCC DTV emission mask.
2.
EVM (Error Vector Magnitude) and SNR (Signal-to-Noise Ratio) mea-
surements and the Eye Diagram.
3.
Constellation Diagram - This is an I (symbol) versus Q plot. Can be used to
show amplifier non-linearity.
4.
RTAC (Real Time Adaptive Correction) Linear Correction - This plot
shows the gain and phase correction employed for linear distortions (Fre-
quency response and Group delay) versus the frequency across the channel.
5.
RTAC Non-Linear Correction (APEX exciter only) - This plot will display
the AM-AM and AM-PM correction employed for non-linear distortions in
the amplifier chain.
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Страница 136: ...A 12 888 2517 001 1 3 05 WARNING Disconnect primary power prior to servicing eCDi Appendix A SigmaCD Fault and Meter...
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Страница 172: ...E 10 888 2517 001 1 3 05 WARNING Disconnect primary power prior to servicing eCDi Appendix E Platinum TV Fault and...