Boonton 4540 Peak Power Meter User Manual Uživatelský manuál stáhnout pdf (Strana 238)

Boonton 4540 Series RF Power Meter

Application Notes

6-10

Item dBm mW

Mesial value 10.0 10.0

Sample n 8.0 6.3

Sample n+1 11.0 12.6

The interpolated crossing time, tx, is calculated from:

where P is in watts and n is the number of the sampling interval, referenced to the trigger event. For this

example

11. The processor computes the rise and/or falltimes of waveforms that meet the following conditions:

a) The waveform must have at least one usable edge (Types 2 through 7).

b) The signal peak must be at least 13 dB greater than the minimum sample value.

The risetime is defined as the time between the proximal and distal crossings (– +).

The falltime is defined as the time between the distal and proximal crossings (+ –).

If no samples lie between the proximal and distal values for either edge (rise or

fall), the risetime for that edge is set to 0 seconds

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Boonton 4540 Peak Power Meter User Manual Uživatelský manuál Strana 238