Sea Tel 9711-92, Инструкция по установке и эксплуатации

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9711-92 Ku-Band TXRX Maintenance
18-7
18.6.2. Radio M&C
The RS-232, RS-422, or RS-485 (depending on configuration) Radio M&C signals pass from the BDE computer
through the RF M&C port of the base modem and are modulated and demodulated. These M&C signals are
diplexed with the pedestal M&C signals before passing through to the above decks modem. The pedestal
modem then converts the RF signal back to RS-232/422/485, before routing to the M&C port of the above
decks radio equipment via an interface cable.
18.6.3. Channel Identification
There are four base frequencies used in the 400MHz FSK modem assemblies:
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The BDE Modem Transmits Pedestal M&C at 452.5 MHz
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The BDE Modem Transmits Radio M&C at 447.5 MHz
•
The ADE Modem Transmits Pedestal M&C at 465.0 MHz
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The ADE Modem Transmits Radio M&C at 460.0 MHz
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Figure 8 ADE Modem Transmit Frequency Markers
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Figure 9 BDE Modem Transmit Frequency Markers