Measurement
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If the trigger source is set to "External" and the trigger event to "On" (On
Point), set the low-latency external trigger mode.
1. Press Trigger key.
2. Click Low Latency.
3. Click ON to activate the-low latency external trigger mode.
2. Setting the external trigger delay time
Set the external trigger delay time at each point. The setting resolution is
10 µs.
1. Press Trigger key.
2. Click Trig Delay.
3. Enter an external trigger delay time.
External Trigger Delay Time and Point Trigger Interval
External trigger pulses, supplied until the next measurement becomes
ready after the start of a one-point measurement, are ignored, and the
next trigger is generated by a pulse supplied after the completion of the
one-point measurement.
The time until the next trigger can be accepted after the start of a one-
point measurement depends on the IFBW and other settings of the
analyzer. For example, in the case of a frequency's zero-span
measurement, the time until the next measurement is ready after the start
of a one-point measurement is obtained by dividing the time required for a
single sweep in On Sweep mode, instead of On Point mode, by the number
of measurement points. If you use the point trigger function with external
trigger pulses that are wider than this time, point trigger measurement is
performed at each pulse input.
The figure below shows the timing chart of an external trigger when the
point trigger function is on.
Timing chart of external trigger (trigger event = on, trigger source
= external, low-latency external trigger mode = on)
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