Giga-tronics 8650A Series, Руководство по эксплуатации

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Series 8650A Universal Power Meters
2-10 Manual 31470, Rev. E, April 2001
Proceed as follows to configure the power meter for gated measurements by the sensors:
1. From the Power Meter Configuration menu, select [ T Gate ] then [Config] to display the Gate/
Trigger menu.
2. From the Gate/Trigger menu, select the sensor with the cursor keys, then select the mode of gated
operation for that sensor. The options are External Gate, Ext. Trigger Rising, External Trigger
Falling, and Burst Edge.
a. Gate:
This configures the gate to measure only during a high or low input. Gate Low enables power
meter readings on a low logic input, and Gate High enables readings on a high (+5 V) logic
voltage input (see Figure 2-5).
1.) Select the sensor to be configured with the cursor keys. The current configuration of
the selected sensor will be indicated in the window at the bottom of the screen.
2.) Press [External Gate] to set the sensor gate measurement to high or low.
3.) Press [ Gate High ] or [ Gate Low ] to set the external gating to a high or low logic state.
4.) Press [ OK ] to return to the Gate/Trigger menu, or < Cancel > to abort the
configuration.
b. External Trigger:
Figure 2-6 illustrates the Time Gated measurement parameters with an external trigger. When
an external trigger is input (point A in Figure 2-6), it starts the Trigger Delay. At the end of the
Trigger Delay, the Gated Time measurement starts and lasts until its preselected time expires.
The Holdoff Time then prevents any further trigger inputs (such as point B below): from start-
ing a new gated measurement until it has timed out.:
1.) Press [ Ext Trigger Rising ] or [ Ext Trigger Falling ] to set the parameters of the external
trigger. The settings are:
✔
Delay
✔
Gate Time
✔
Holdoff
Figure 2-6: Illustration of External Triggering
Gate
Time
Holdout
Time
RF
Trig
Delay
A B
EXT TRIG