Figure 3-25. Baseband Loopback; Figure 3-26. Interface Loopback - Comtech EF Data SLM-3650 Installation And Operation Manual

SLM-3650 Satellite Modem
Operation
IBS OR IDR
CUSTOMER
DATA
INTERFACE
REMOTE SERIAL
INTERFACE
FAULT INDICATORS
SATELLITE MODEM
Note: When baseband loopback is turned ON, data is looped back on the customer side of the interface. This is a bi-directional
loopback of the baseband data. This test mode will verify the customer equipment and cabling between the modem and the
customer equipment. The baseband loopback is not bi-directional in D&I.
IBS or IDR
CUSTOMER
DATA
INTERFACE
REMOTE SERIAL
INTERFACE
FAULT INDICATORS
SATELLITE MODEM
Note: When interface loopback is turned ON, data is looped back on the modem side of the interface. This is a bi-directional
loopback of the data after the baseband data had the 16/15 overhead added. This test mode will verify the internal channel unit
interface operation.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
ENCODER/
MODULATOR
MICRO-
POWER SUPPLY
COMPUTER
DEMODULATOR/
DECODER

Figure 3-25. Baseband Loopback

ENCODER/
MODULATOR
MICRO-
POWER SUPPLY
COMPUTER
DEMODULATOR/
DECODER

Figure 3-26. Interface Loopback

3–77
Revision 3
MN/SLM3650.IOM
TRANSMIT RF
EQUIPMENT
ANTENNA
AC POWER
RECEIVE RF
EQUIPMENT
TRANSMIT RF
EQUIPMENT
ANTENNA
AC POWER
RECEIVE RF
EQUIPMENT