Tektronix PSM3000 Series, Руководство пользователя, Страница: 70 / 76

High Speed Logger Application
Meas Start This window allows you to select when to start a measurement. The measurement
process proceeds as follows:
1. Select the start criteria with one of the following settings:
Threshold: Clicking start causes the application to monitor the incoming
measurements (average power if CW has been selected and peak power
if peak has been selected). As soon as the appropriate measurement
exceeds the speci
fi ed threshold, the measurement proceeds. The threshold
is speci fi ed in dBm.
External TTL Trigger: Clicking start causes the application to monitor the
external TTL trigger input. When a trigger occurs, measurement will
begin. Only the
fi rst measurement requires a trigger. You can set the
trigger timeout. If the timeout occurs before the measurement begins, no
measurements will be made.
Time of Day: Set the time of day when you want measurements to begin.
Click the start button to begin the measurement process.
2. Execute a delay if desired. The delay begins immediately after the start
criteria has been satis
fi ed and precedes the start of measurements.
56 RF and Microwave Power Sensors/Meters