Interface Checkout; Figure 5-1. Fault Isolation Test Setup - Comtech EF Data SDM-300A Installation And Operation Manual

Maintenance
5.1.1

Interface Checkout

Use the following procedure and the test setup in Figure 5-1 to inspect the interface.
1. Connect a BER test set to the appropriate modem data connector as shown in
2. Set up the modem for baseband loopback operation by using the Configuration
3. Change the modem from baseband loopback to interface loopback operation by
5–2

Figure 5-1. Fault Isolation Test Setup

Figure 5-1. Refer to Chapter 2
Interface front panel menu
Chapter 3 for a block diagram of the baseband loopback operation.
using the Configuration Interface front panel menu
run error free. Refer to
operation.
for external modem connections.
(Chapter 3). The modem will run error free. Refer to
Chapter 3 for a block diagram of the interface loopback
SDM-300A Satellite Modem
(Chapter 3). The modem will
Rev. 4