RAD Data comm ASM-20 - Manual (Page 39)

ASM-20 Installation and Operation Manual Chapter 4 Troubleshooting and Diagnostics
Communication Link Tests 4-5
RCVR
RCVR
LOCAL
DATA
TERMINAL
XMTR
XMTR
LOCAL ASM-20 REMOTE ASM-20
DATA
DATA
CLK
CLK
REMOTE
DATA
TERMINAL
REM
Pressed
Figure 4-4. Remote ASM-20 in Digital Loopback
Local Digital Loopback
This test is activated by pressing the DIG push button. It loops the received data
back to the remote ASM-20. (This test is equivalent to activating the remote
loopback from the remote ASM-20 – see
Figure 4-5 ). The operator at the remote
end can determine the performance of the local and remote ASM-20 units, and
the lines between them.
The modem with the pressed DIG push button must be in RCV or ASY mode
RCVR
RCVR
DIG
Pressed
LOCAL
DATA
TERMINAL
XMTR
XMTR
LOCAL ASM-20 REMOTE ASM-20
DATA
DATA
CLK
CLK
REMOTE
DATA
TERMINAL
Figure 4-5. Local ASM-20 in Digital Loopback
Note