2-port vector network analyzer ARINST VNA-PR1
19
Figure 9.13 - The electrical cable length is compensated
The time compensation value is displayed on the device screen (designation ED) and is saved in the user
settings Presets even when the device is turned off. When changing the calibration plane, it is necessary
to delete the value of the compensation of the electrical length of the cable, setting the value equal to ze-
ro.
9.7. Shift of the amplitude scale on plots Lin. Amp and Log. Amp
It is used for convenience when measuring the amplitude-frequency characteristic (AFC) of active de-
vices.
The maximum allowable input power is +10 dBm. It is recommended to use external atten-
uators when measuring the parameters of active devices, which reduce the input signal power to
a level of no more than 0 dBm.
9.7.1. Install external attenuators in the test port circuit of the device.
9.7.2. Enter the
Device
section of the main menu (Figure 9.10).
9.7.3. When using external attenuators or amplifiers, to correctly display the amplitude of the input
signal, enter the scaling value
S21 Amp.
offset
in decibels via the numerical value input menu or buttons
and
.
For the convenience of displaying a real plot on the grid of the device, the numerical value of the at-
tenuation can be entered either positive or negative.
The device will automatically shift the plot within the measurement range, compensating for signal at-
tenuation by external attenuators (Figure 9.14).
Figure 9.14 - Compensation of signal attenuation by attenuators
Summary of Contents for ARINST VNA-PR1
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