Local Line Loopback; Remote Terminal Loopback - Motorola DDS/MR64 Installation And Operation Manual

Diagnostics
DTE Interface
DTE
DTE Interface
DTE
5-2
TRANSMIT
LOGIC
RECEIVE
LOGIC
Bilateral Loopback
Figure 5-1
Remote Terminal Loopback (RT)
TRANSMIT
LOGIC
RECEIVE
LOGIC
Figure 5-2
Local Line Loopback (LL)
DDS/MR64
LINE
DRIVER
LINE
RECEIVER
Local Unit
LINE
DRIVER
LINE
RECEIVER
Local Unit
DDS
Line
DDS
Line