![Keysight N4431D Reference Manual Download Page 26](http://html1.mh-extra.com/html/keysight/n4431d/n4431d_reference-manual_1961141026.webp)
1-18 Electronic Calibration Modules Reference Guide
General Information
Compatible Network Analyzers
1-
b. Compatible PNA instruments must have firmware version
≥
A.10.49.07.
c. Compatible ENA E5072A instruments must have firmware version
≥
B.02.39.
d. Compatible ENA E5071C instruments must have firmware version
≥
B.13.29.
e. Compatible ENA E5063A instruments must have firmware version
≥
A.03.72.
f. Compatible ENA E5061B instruments must have firmware version
≥
B.04.86.
g. Compatible ENA E5080A instruments must have firmware version
≥
A.12.55.05.
h. ENA E5080B instuments have no restrictions on firmware revision.
i. Compatible PXIe instruments must have firmware version
≥
A.03.10.
M980xA instruments have no firmware restrictions.
j. Compatible USB-VNA instruments must have firmware version
≥
A.10.55.07
k. Compatible FieldFox Handheld instruments must have firmware version
≥
A.10.2x (CPU2 units) and
≥
A.08.19 (CPU1 units).
l. The N9912A FieldFox does not support ECal.