HP 8360 B Series, User Manual

Page: 217 / 496

Fltness
When correction frequencies are arbitrarily spaced, the number of
interpolated points varies.
When utilizing the user flatness correction feature, do not exceed
the swept signal generator ALC operating range. Exceeding the
ALC range causes the output power to become unleveled and
eliminates the benefits of user flatness correction. The ALC range
can be determined by subtracting the minimum output power
(-20
from the maximum specified power. When the optional
step attenuator is ordered on a swept signal generator, at times it
may be necessary to uncouple the attenuator to obtain the full ALC
range. This can be accomplished by selecting POWER [MENU]
For example, an HP 83620B has an ALC range of
to -20
When user flatness correction is enabled, the maximum test
port power is equivalent to the maximum available leveled power
minus the maximum path loss
For example,
if an HP 83620B has a maximum path loss of 15 due to system
components between the source output and the test port, the test
port power should be set to -5
When user flatness correction
is enabled, this provides the maximum available power to the device
under test (DUT).
Programming Codes
n
CORRection:FLATness {<num>[freq
The portion of the above command contained in can be
entered from one to 801 times. This command creates the
frequency-correction pair array similar to the front panel array.
The correction entered is at the associated frequency and
frequencies in between are determined by linear interpolation.
n
CORRection:FLATness?
This command queries the flatness array created with CORR:FLAT.
n
CORRection:ARRay[i]
The portion of the above command contained in must
be entered 1601 times. This array must contain 1601 evenly
spaced correction values. This command creates the
correction set that has no equivalent front panel entry. If this
command is used to enter flatness correction information the
CORRection:SOURce command (described below) will be set to
array. There is an array for the foreground state
and for the
background state (i=l). If [ i is not specified, the default is the
foreground state (i=O).
n
CORRection:ARRay[i]?
This command queries the entire correction set.
n
CORRection:SOURce[i]
Operating and Programming Reference F-9