P300H
P300 Series Modem Installation and Operating Handbook
Page 54
TRAFFIC SUMMARY SCREEN
When there are no faults this screen shows how long since the last interruption for both paths (as for the
lower line of the example shown), together with the carrier status for the transmit path and the Eb/No
(discussed later) for the receive path. If either path has a traffic fault / warning active, then the status is
replaced by an abbreviated 40 character fault message on the top or the bottom line for Tx & Rx
respectively. A more descriptive message is available on the
Info
screens accessed with the Down
Arrow key. These display a more descriptive 80-character messages for the
Detailed Rx Traffic status
,
the
Detailed Tx Traffic Status
, and a
Detailed Demodulator Status
.
Any
Unit Faults
override
Tx & Rx Traffic Summary
and displays the fault message, such as
When a unit fault is displayed, it takes over the whole of the Tx & Rx Traffic Summary screen (as it is
important, and likely to relate to both Tx & Rx paths). The three detailed screens are however still
available by pressing the
Down key from the Unit Fault Message
. On each successive press the
screen cycles through the following three screens, until on the fourth press it returns to whichever of the
two Status Screens has been selected as the default.
DETAILED RECEIVE TRAFFIC STATUS
Status Traffic Summary Screen). Pressing down again selects the Transmit Detailed Traffic
tatus.
This screen normally shows the time of the last traffic interruption, the (estimated) user BER, along with
the Doppler buffer overflow & underflow counts (reset by
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), and the current
buffer fill status. If the BER indication is followed by an asterisk, then there have been less than 100
errors, and the results are statistically weak. If there is a receive
traffic fault
, then a more detailed two
line description of the fault/warning replaces the status information (as opposed to the one line message
on the
S
Tx Fault: Data input is all ones (AIS)
Rx path OK for 36.8 hrs, BER <1 E12 Info
Traffic Summary Screen
(Tx top line, Rx bottom line)
Unit Fault: Tx IF synth failure,
Tx carrier muted.
Unit Fault (overrides Traffic or Configuration Summary screens)
Rx OK since 22:58 on 3/6/97
BER >1E-7* 2 -0 53% Tx
Detailed Receive Traffic Status
