MDS 05-3628A01, Rev. B
MDS 4790M (MPT 1411) I/O Guide
61
GROUP 3—DIAGNOSTICS
Operating Status
This screen displays three key operating conditions of the radio; TX key status,
Received Signal Strength Indication (RSSI), and Signal-to-Noise (S/N) ratio. Unlike
other screens, the information shown on the Operating Status screen is preserved
across power outages and radio switchovers. This screen has no timeout and will
remain displayed until changed by an operator.
Active Radio
Status
This screen is used to display alarm conditions, if any. A list of major and minor
alarm events can be found in Table 10 on page 42.
If alarms are indicated, press ENTER to display the first alarm. To scroll through
the list of alarms, press the right
or down
arrow button. Press ESCAPE to
return to the Active Radio Status screen.
Receive Signal
Strength
This screen displays the received signal strength in dBm.
In a typical master station configuration, the received signal strength is read from
each of the remote radios that transmit to the master station in turn.
S/N Ratio
This screen displays the current signal-to-noise ratio in dBm.
Radio Selection
This screen is used to set or display the active transceiver board inside the radio.
When
the
radio selection
is:
AUTO
—switch-over to the inactive transceiver board will occur if a fault condition
occurs on the active transceiver board.
A
—transceiver board A is set as the active transceiver board and switch-over
will not occur if an error condition is detected in the radio.
B
—transceiver board B is set as the active transceiver board and switch-over
will occur if an error condition is detected in the radio.
To change which transceiver board is active, or to enable automatic switch-over,
press the ENTER key, then use the up/down arrow buttons to select
AUTO
,
A
or
B
. Press ENTER again to make the change.
Operating Status
TX: dekeyed
RSSI: -60 dBm
S/N 10 dB
Active Radio Status
Alarms present
(enter for details)
Event: 20 (MINOR)
Configuration error
STAT command, page 41
Rx Signal Strength
-120 dBm
RSSI, RSSI! command,
page 38
S/N Ratio
SNR, SNR! command, page 41
Radio Selection
AUTO
Radio A is active
RADIO [A/B/AUTO]
command, page 38
