Agilent Technologies B2911 Manuale Utente Scaricare il pdf (Pagina 5)

External Triggering Mode

There are two operation modes used by the power meter to synchronize with

the signal generator. Please refer to the examples described below regarding the

frequency sweep operation.

Immediate or Free Run Mode

First, connect the signal source TRIG OUT to the power meter TRIG IN. Then, set

the start frequency, stop frequency and step frequency for the signal generator

and power meter. Once the sweeping operation starts, the signal generator

will start to step through the frequency points and output a trigger signal to

the power meter at every step for synchronization purposes. Only one way

synchronization occurs during this process, which is from the signal generator

to the power meter. A proper dwell time must be set in the signal generator to

ensure that all measurement readings in the power meter are settled before

stepping through the next frequency point.

Note: The lower the power level is, the longer the settling time for measurement

readings. Therefore, the dwell time setting is directly related to the power level.

Trigger Output Enabled

First, connect the signal source TRIG OUT to the power meter TRIG IN. Then, set

the start frequency, stop frequency and step frequency for the signal generator

and power meter. Once the sweeping operation starts, the signal generator

will step to the ﬁ rst frequency point and generate a trigger output signal to

the power meter and the acquisition begins. After the measurement reading is

settled, the power meter will output a trigger signal back to the signal generator

to continue with the next frequency point. This sequence will be repeated for

every frequency point. Here, you can see that the synchronized communication

operates in two directions and setting the correct dwell time on the signal

generator is no longer needed.

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Agilent Technologies B2911 Manuale Utente Pagina 5