Monitor & Control - Comtech EF Data DT-4500 Series Installation And Operation Manual

DT-4500 Series C- and Ku-Band Down Converters
Introduction
Using the example of a DT-4512 Ku-Band Down Converter:
RF signal processing is accomplished when the RF input of 12200 to 12750 MHz,
at a typical level of -45 dBm, is mixed in the first mixer with a 13280 to 13830
MHz synthesizer signal from a multiplier, in 125 KHz fine tuning steps. The
synthesizer is locked to a 5/10 MHz reference oscillator. (The first mixer is located
in the converter Signal Path Module, and the synthesizer consists of a
Coarse/Fine Step Module and a Sum Loop Module.)
The intermediate IF of 1080 MHz is mixed in the second mixer with the1150 MHz
IFLO providing a +20 dBm @ 1 dB compression, 70 MHz IF output. (The second
mixer is also located in the converter Signal Path Assembly.)
1.2.3 Monitor & Control
The Monitor & Control Assembly is designed to monitor the functions of the
DT-4500, and provide the local and remote control command inputs to the
converter.
For Local Monitor & Control: Local operator input commands and the status of
the DT-4500 display on the front panel Vacuum Fluorescent Display (VFD). The
unit indicates converter faults via the front panel "FAULT" and "STORED FAULT"
LED indicators. Use the VFD and local keypad to browse and manage the stored
events and faults log.
For Remote Monitor & Control: All configuration control, status retrieval and
adjustments are available with connections to the converter rear panel:
• A DB-9F selectable EIA-232C/EIA-485 'J1 | COM1' female connector
interface provides serial-based remote control communications. ASCII
commands and queries are issued through the serial remote interface.
• A female RJ-45 100Base-TX 'Ethernet' connector interface provides
Ethernet-based remote monitor and control capability via SNMP, Telnet,
or the HTTP (Web Server) Interface.
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MN/DT4500.IOM
Revision 2