TA430 datasheet(31/42 Pages) PICO

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PicoVNA® 100 Series vector network analyzers

Save on trigger utility (PicoVNA 108 only)

Uniquely, benefiting from the fast measurement speed of the PicoVNA, save on trigger

provides a fast and convenient method for capture and display of measurement data

from multiple or changing device-under-test states. Think, for example, of variable

attenuators, digitally configured filters, phase shifters or variable-gain amplifiers. Think

also of devices under changing power supply, bias or environmental conditions, or even

of a multiplexed measurement of a number of devices in the production environment.

The PicoVNA can be set up to store up to 1024 triggered sweep measurements which

can then be inspected, reordered and saved to disk in a number of formats. The trigger

event can arrive on the external trigger input, or as a remote software trigger or a manual

key press.

Captured measurement sweeps can be selected for display which, by default, shows

one to four selected S-parameters across a maximum of 64 individually coloured traces,

all plotted over the band of operation. The plotted sweeps can be any subset of all the

captured sweeps and data can be normalized to one of the captured sweeps, which is

useful for examining changes from sweep to sweep.

The plots to the right show S

21 (magnitude and normalized magnitude in dB) for 16

states of a programmable step attenuator. The plot beneath and right plots S

21 and S11

at a user-selected frequency of 986 MHz. Here the horizontal axis plots measurement

sweep number, each in this case representing a unique state of the attenuator. All

four S-parameters can be displayed simultaneously in this way on the graphs. Using

a hardware external trigger and maximum resolution bandwidth, all the data for these

plots was captured within 1 second!

The captured sweep data can be saved to disk in a number

of formats, including Touchstone®, for use with third-party

applications. Data can be saved grouped by S-parameter, for

example. The file list on the right shows the files created for

the stepping attenuator. You simply enter the name Step_

Attn when saving the data, and the family of files shown is

automatically created. In each of these files each column

contains the S-parameter data for a given sweep. The first

column after the frequency column contains data from the

first sweep, the second has data from the second sweep and so on.

The data can also be saved for any single frequency within the sweep range used to

capture the data. There is also an option to save the entire dataset for later use.

Data can be saved to disk

ordered by S-parameter

Capture and inspect multiple traces of one or multiple s-parameters

These are S21 plots for sixteen 1 dB increments of a step attenuator

Capture and inspect multiple traces of one or multiple S-parameters. These are S21

plots for sixteen 1 dB increments of a step attenuator.

Normalize to one of your traces

Or plot a slice through your data at a single frequency.

These are S21 and S11 at 986.35 MHz

Normalize to one of your traces...

... or plot a slice through your data at a single frequency.

These are S21 and S

11 at 986.35 MHz.

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