Keysight N9915-90020 User’s Guide 773
System SettingsFUTURE
Utilities
How to view and change the Frequency Extender (Freq Extnd) Settings
The following are the only supported modes for the frequency extender feature:
SA (Option 233), mixed analyzers, RTSA (Option 350), IQA (Option 351), OTA
(Option 370/377/378), PAA (Option 360) modes, and VSA (via the Remote
Server feature).
For this section, refer to
Figure 31-1 on page 777, Figure 31-2 on page 778,
Figure 31-3 on page 778, Figure 31-4 on page 779, Figure 31-5 on page 779,
and
Figure 31-6 on page 780.
These settings are used to set up a frequency extender head (e.g., OML head).
The frequency extender feature can be used in OTA FR2 measurements. See
also,
Chapter 13, “Over–the–Air Measurements (OTA) – LTE FDD Option 370,
LTE TDD Option 371, 5G TF Option 377, 5G NR / 5G NR EVM Conducted
Option 378.”
IMPORTANT!
When using a frequency extender with the FieldFox you need to manually
set the LO power:
– When using the mixer, the LO power should be reduced to –12 dBm and
– Reduce frequency span to make measurements until the “unleveled
power” message goes away (requires ≥A.12.40 firmware)
If you upgrade your FieldFox firmware to ≥A.12.40, but find you are unable
to adjust the LO power level to –12 dBm, refer to
“Erase User Data” on
page 810
.
IMPORTANT!
Due to limitations in the OML hardware, the heads have a 6 GHz frequency
span.
Examples
Using a 24 to 40 GHz mixer, you can sweep:
— 24 to 30 GHz and 25 to 31 GHz, but not
—24 to 31 GHz
Assuming the same 24 to 40 GHz mixer, using OTA mode, you can
— Set a CC0 to 24 GHz and CC1 to 31 GHz, but not
— CC0 to 4 GHz and CC1 to 32 GHz, because you have to remain within
the mixer’s band
PAA and 89600 VSA (via the Remote Server feature) are compatible with
the frequency converter heads, but cannot apply or edit the frequency
head corrections.
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