27
LDM-144LR
Table 4-2. Controls and Indicators.
Designation
Control/Indicator
Function
PWR
Indicator, green
When turned on, indicates that the unit is
powered.
RTS
Indicator, yellow
When turned on, indicates that an active
RTS signal is issued by the DTE.
TD
Indicator, yellow
When turned on, indicates that a steady
“space” signal is being transmitted. When
data is transmitted, the indicator flickers.
RD
Indicator, yellow
When turned on, indicates that a steady
“space” is being received. When data is
received, the indicator flickers.
DCD
Indicator, yellow
When turned on, indicates a valid receive
signal according to the detected carrier.
TEST
Indicator, red
When turned on, indicates that the
LDM-144LR is set to one of the three
loopback modes or that the internal BER
test is activated.
ERR
Indicator, yellow
The ERR LED is active only when the
internal BER tester is activated. If errors
are detected in the test pattern, the ERR
indicator blinks or remains in the on state.
