Channel Tests - GE L90 Instruction Manual

6.2 STATUS
PATH: ACTUAL VALUES

# CHANNEL TESTS

#
6
The status information for two channels is shown here. A brief description of each actual value is below:
• CHANNEL 1(2) STATUS: This represents the receiver status of each channel. If the value is "OK", the 87L Differential
element is enabled and data is being received from the remote terminal; If the value is "FAIL", the 87L element is
enabled and data is not being received from the remote terminal. If "n/a", the 87L element is disabled.
• CHANNEL 1(2) LOST PACKETS: Current, timing, and control data is transmitted to the remote terminals in data pack-
ets at a rate of 2 packets/cycle. The number of lost packets represents data packets lost in transmission; this count can
be reset through the
• CHANNEL 1(2) LOCAL LOOPBACK STATUS: The result of the local loopback test is displayed here.
• CHANNEL 1(2) REMOTE LOOPBACK STATUS: The result of the remote loopback test is displayed here.
• CHANNEL 1(2) LOOP DELAY: Displays the round trip channel delay (including loopback processing time of the
remote relay) computed during a remote loopback test under normal relay operation, in milliseconds (ms).
• CHANNEL 1(2) ASYMMETRY: The result of channel asymmetry calculations derived from GPS signal is being dis-
played here for both channels if
transmitting direction is less than the delay in the receiving direction; a negative "–" sign indicates the transit delay in
6-6
! !"
STATUS CHANNEL TESTS
CHANNEL 1
STATUS: n/a
CHANNEL 1 LOST
MESSAGE
PACKETS:
CHANNEL 1 LOCAL
MESSAGE
LOOPBCK STATUS: n/a
CHANNEL 1 REMOTE
MESSAGE
LOOPBCK STATUS: n/a
CHANNEL 1
MESSAGE
LOOP DELAY:
CHANNEL 1 ASYMMETRY:
MESSAGE
+0.0 ms
CHANNEL 2
MESSAGE
STATUS: n/a
CHANNEL 2 LOST
MESSAGE
PACKETS:
CHANNEL 2 LOCAL
MESSAGE
LOOPBCK STATUS: n/a
CHANNEL 2 REMOTE
MESSAGE
LOOPBCK STATUS: n/a
CHANNEL 2
MESSAGE
LOOP DELAY:
CHANNEL 2 ASYMMETRY:
MESSAGE
+0.0 ms
VALIDITY OF CHANNEL
MESSAGE
CONFIGURATION: n/a
PFLL
MESSAGE
STATUS: n/a
!"
COMMANDS CLEAR RECORDS
CHANNEL ASYMMETRY
L90 Line Differential Relay
Range: n/a, FAIL, OK
Range: 0 to 65535 in steps of 1. Reset count to 0 through
the
COMMANDS !" CLEAR RECORDS
0
Range: n/a, FAIL, OK
Range: n/a, FAIL, OK
0.0 ms
Range: ±10 ms in steps of 0.1
Range: n/a, FAIL, OK
Range: 0 to 65535 in steps of 1. Reset count to 0 through
the
COMMANDS !" CLEAR RECORDS
0
Range: n/a, FAIL, OK
Range: n/a, FAIL, OK
0.0 ms
Range: ±10 ms in steps of 0.1
Range: n/a, FAIL, OK
Range: n/a, FAIL, OK
menu.
is "Enabled". A positive "+" sign indicates the transit delay in the
6 ACTUAL VALUES
6.2.9 CHANNEL TESTS
menu.
menu.
GE Multilin