Keysight InfiniiMax III+ Series, Руководство пользователя

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Performance Verification for N2830A-Series Probes
7
InfiniiMax III+ Series Probes User’s Guide 123
14
Trigger VNA to perform a single sweep.
a
Press “Trigger” under Channel Setup, and then the green soft-key for
“Single”.
b
Under “Scale” menu, adjust the reference level until the 50 MHz point (left
side of the screen) is at center screen. Reference level should be
approximately –20 dB, but can vary a few tenths of a dB either way.
c
Display should look like Figure 96 . If it looks noticeably different, the probe
tip wires may not be making contact under the pincher.
15
Under menu “Trace/Math/Memory” select “Data/Memory” in the “Data Math”
box.
a
This will divide the current trace (de-embedded vout trace) by the memory
trace (de-embedded vin trace) and therefore show the voltage transfer
function of the probe or “vout/vin”.
b
Again, adjust the “Reference Level” in the scale menu so the 50 MHz point is
at center screen. The display should look like Figure 97 on page 124.
c
Turn on a marker and adjust it to where the trace crosses 3 dB below the
50 MHz point (which is one division below center screen since screen is set
to 3 dB/div).
d
Verify that the BW is
≥
13 GHz for the N2836A solder-in probe head and
N2832A 13 GHz probe amp combination.
Figure 96 De-Embedded V
out
Trace