Comtech EF Data SDM-300L3, Инструкция по установке и эксплуатации

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SDM-300L3 Satellite Modem Revision 1
Installation/Upgrades MN/SDM300L3.IOM
2–8
2.3.3 Turbo Codec Installation
The Turbo Card is installed in the same slots as the Reed-Solomon PCBs. While the
Reed-Solomon uses two cards (TX and RX), the Turbo Codec uses only a single card.
Duplex Reed-Solomon can be installed with Turbo Codec.
CAUTION
DO not mix Simplex Reed-Solomon PCBs with Turbo PCs. Damage to the
equipment may be the result.
2.3.3.1 Unpacking
CAUTION
This equipment contains parts and assemblies sensitive to damage by ESD.
Use ESD precautionary procedures when touching, removing, or inserting
PCBs.
1. Remove the Turbo Codec PCB and mounting hardware from the cardboard
caddypack and anti-static material.
2. Check the packing list to ensure the shipment is complete.
3. Inspect the Turbo PCBs for any shipping damage.
2.3.3.2 Installation
The following tool is required to install the overhead interface PCB:
Description Application
Phillips

Screwdriver
To remove and replace cross-point screws.
Use the following information to install the Turbo Codec PCB as a daughter card on the
main PCB.
Refer Figure 2-4 for installation location of the Turbo Codec PCB.
CAUTION
Turn the power off before installation. High current VDC is present. Failure
to do so could result in damage to modem components.
1. Turn off the modem and unplug the power supply.
2. Remove the rear panel retaining screws. Slide the main modem assembly out
from the rear of the modem chassis.
3. If required: Card 1 Overhead Board Removal – Remove the four rear panel
screws around the 50-pin I/O switch module. Unplug the I/O module, then
remove the seven mounting screws holding the Overhead board and carefully lift
the board out.