Black Box MWU2000-V35 Clear System Counters and Channel Tracer, Time Tracer Errors versus Time

2.048Mbps Wireless Modem

Each column represents the percent of RADIO ERROR BUFFERS in each of the RF channels, out of all the buffers that were transmitted on the channel. A “–” sign at the bottom represents a channel that is not included in the set of hopping frequencies. On top of the graph, information is provided on the channel with the highest error rate (Max errors in percentage and the number of the channel with the maximum error rate). The distribution of errors by the channel graph is useful to identify problematic channels with an unacceptable error rate. Under normal conditions, the error rate should be similar for all channels and recommended to be no more than about 2%.

Clear System Counters and Channel Tracer

In the Counters and Tracers menu, type 4 to clear the Systems Counters and the information accumulated in the Channel Tracer graphs.

The System Counters and Channel Tracer graphs display information accumulated since the last time they were cleared.

Time Tracer Errors versus Time

In the Counters and Tracers menu, type 5 to display the Time Tracer errors over time graph.

Figure 3-11. Time Tracer Errors vs. Time Graph

The graph displays the Radio Error Buffers Rate over time (up to the present moment) using the resolution defined in Set Time Tracer Resolution (option 7 in the Counters and Tracers Menu). Information on the maximum error rate in the tracing period, and how much time passed since this event occurred appears at the top of the graph. Each column in the graph represents the relative error rate in the relevant time period. A column with 10 # signs represents the channel with the maximal error rate, and the height (number of # signs) of each of the other columns represents the error rate in each channel relative to the above maximum. This graph is useful for identifying the existence of time-dependent interference, e.g. activation of a nearby transmitting device at a specific time every day. The graph displays the history of the last 69 time units according to the defined resolution, or the history since the last time the Time Tracer was reset (see also page 76).

Time Tracer Max Consecutive Errors versus Time

In the Counters and Tracers menu, type 6 to view the Time Tracer Max Consecutive Errors versus Time graph.

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