Agilent Technologies 8360B, Руководство пользователя, Страница: 217 / 496

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Fltness Menu
When correction frequencies are arbitrarily spaced, the n um b er of
in terp olated p oints v aries.
When utilizing the user atness correction feature, do not exceed
the sw ept signal generator ALC op erating range. Exceeding the
ALC range causes the output p o w er to b ecome unlev eled and
eliminates the b enets of user atness correction. The ALC range
can b e determined b y subtracting the minimum output p o w er
( 020 dBm) from the maximum sp ecied p o w er. When the optional
step attenuator is ordered on a sw ept signal generator, at times it
may b e necessary to uncouple the attenuator to obtain the full ALC
range. This can b e accomplished b y selecting PO WER [MENU]
[Uncoupl A tten]. F or example, an Agilent 83620B has an ALC range
of 30 dB ( +10 to 020 dBm).
When user atness correction is enabled, the maximum settable test
p ort p o w er is equiv alen t to the maximum a v ailable lev eled p o w er
min us the maxim um path loss (P
o max
0 P
path loss
). F or example,
if an 83620B has a maximum path loss of 15 dB due to system
comp onen ts b et w een the source output and the test p ort, the test
p ort p o w er should b e set to 05 dBm. When user atness correction
is enabled, this pro vides the maximum a v ailable p o w er to the device
under test (DUT).
Programming Codes
SCPI:
CORRection:FLA Tness f <n um>[freq sux], <n um>[DB] g 2*801
The p ortion of the ab o v e command con tained in f g can b e
en tered from one to 801 times. This command creates the
frequency-correction pair array similar to the fron t panel array .
The correction en tered is at the asso ciated frequency and
frequencies in b et w een are determined b y linear in terp olation.
CORRection:FLA Tness?
This command queries the atness array created with CORR:FLAT .
CORRection:ARRa y[i] f <n um>[DB] g 1601*1601
The p ortion of the ab o v e command con tained in fg m ust
b e en tered 1601 times. This array m ust con tain 1601 ev enly
spaced correction v alues. This command creates the 1601-p oint
correction set that has no equiv alen t fron t panel en try . If this
command is used to en ter atness correction information the
CORRection:SOURce command (describ ed b elow) will b e set to
array . There is an arra y for the foreground state (i=0) and for the
bac kground state (i=1). If [i] is not sp ecied, the default is the
foreground state (i=0).
CORRection:ARRa y[i]?
This command queries the en tire 1601-p oint correction set.
CORRection:SOURce[i] ARRa yj FLA Tness
Operating and Programming Reference F-9