27
28
Remote Loop: Idle
(default)
The Remote Digital Loopback (RDL) test checks the performance
of both the local and remote Model 2710As, as well as the communica-
tion link between them. Data from the local DTE is sent across the
entire communication circuit and looped back to the local DTE.
The Model 2710A Initiating a RL can be in one of the following
states:
Idle
No user-controlled loopbacks are active.
TxPr
The Model 2710A is sending the preparatory phase pat-
tern lasting for approximately 2 -5 seconds.
WtAk
The Model 2710A is waiting for an acknowledgement
from the remote unit. If the remote unit does not
respond, the WtAk message will remain on the screen.
RxAk
The Model 2710A has received an acknowledgement
from the remote unit.
Tout
The Model 2710A is waiting before entering the Remote
Loopback test mode.
TM
The Model 2710A has successfully negotiated the
Remote Loopback test and is in control of the remote
unit. You may send a test pattern at this point by press-
ing:
c [spacebar]
TxTr
The Model 2710A is sending a Terminate Loopback mes-
sage to the remote unit. If the remote unit does not
respond, the local unit will return to the Idle state.
Tx1s
If the remote Model 2710A responds to the local Model
2710A’s terminate loopback request, the local unit then
sends an all ones pattern before returning to the Idle
state
TxP
The Model 2710A is sending a test pattern while in Test
Mode
IdlP
The Model 2710A is sending a test pattern in place of
data. The Model 2710A is not in test mode.
The Model 2710A receiving a RL can be in one of the following states:
RxPr
The Model 2710A is receiving a preparatory pattern.
Sack
The Model 2710A, upon receiving a preparatory pattern,
sends an acknowledgement message.
RL
The Model 2710A is in remote or CO initiated loopback
mode.
RxTr
The Model 2710A is receiving a terminate loopback mes-
sage.
Wt1s
The Model 2710A is waiting for a sequence of all ones and
will time out if it does not receive it.
IdleP
The Model 2710A is sending a QRSS, 511 or 2047 pattern.
Off
The Model 2710A is in local loopback.
Test Pattern: Idle
(default)
Options: Idle or Sending
To send a pattern, press the ‘c’ key and press [spacebar] to send the
test pattern. The “OK” message indicates the received test pattern is
error-free. The “BE” message indicates errors in the received pattern.
Idle
Indicates that Model 2710A is not sending a pattern.
Sending Indicates that Model 2710A is sending a pattern.
Error Insertion: Off
(default)
Options: On, Off
You may inject intentional errors into the test pattern by turning Error
Insertion ON. The Error (ERR) LED will blink once per second.
Selected Pattern:
Options: QRSS, 511, or 2047
Use this option to select the test pattern used to test the link.
c
d
e
b
