Paradise P300 Traffic Summary Screen, Unit Fault Tx if synth failure Tx carrier muted

TRAFFIC SUMMARY SCREEN

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) 9

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 messages9for 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

Unit Fault: Tx IF synth failure,

Tx carrier muted.

Unit Fault (overrides Traffic or Configuration Summary screens)

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

Rx OK since 22:58 on 3/6/97

BER >1E-7* Buffer +2 -0 53% Tx

Detailed Receive Traffic Status 9

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 ACTION, RESET SLIP COUNTS), 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 Status Traffic Summary Screen). Pressing down again selects the Transmit Detailed Traffic Status.

P300H P300 Series Modem Installation and Operating Handbook Page 51