Conversion Loss Versus Frequency Correction - Agilent Technologies 11970 Series User Manual

Operation
Using the Mixers with MMS Analyzers

Conversion Loss Versus Frequency Correction

The Agilent 71000 Series Spectrum Analyzers with the Agilent 70907A (or B) External Mixer Interface
Module installed has the amplitude-correction function (AMPCOR) available by remote programming.
Use AMPCOR to compensate for the Agilent 11970 Series frequency-dependent conversion-loss
variations. Up to 200 pairs of frequency-amplitude correction points can be entered, depending on the
amount of available internal memory. The frequency values entered must be in increasing order, or an
error condition results. Whenever AMPCOR is on, the correction values are added to all measurement
results.
The values of the correction points are applied across the active measurement range. Between points, the
correction value are interpolated. When the measuring at frequencies outside of the first and last
correction pairs from memory.
When AMPCOR is executed, the frequency pairs are stored in internal memory. The remote commands
DISPOSE ALL, FORMAT, ERASE, and DISPOSE AMP COR erase the amplitude-correction pairs from
memory.
DISPOSE ALL, FORMAT, and ERASE erases much more than the
NOTE
amplitude-correction pairs from memory. Do not use these commands without
referring to the programmer's manual for the Agilent 70000 and Agilent 70900B
to determine their effect on instrument programming.
Because AMPCOR adjusts IF gain and attenuation, AMPCOR should be used with care when measuring
signals near the compression level (also at a frequency that is corrected by the AMPCOR command).
To use AMPCOR for the Agilent 11970 conversion loss correction, first set the single-point conversion
loss function to zero with the following command:
OUTPUT 718; "CNVLOSS 0DB;"
Then build the AMPCOR table with frequency conversion loss pairs. The following example program
line shows three pairs of frequency conversion loss values for a typical Agilent 11970V.
OUTPUT 718; "AMPCOR 50GHZ, 49.6DB, 51GHZ, 49.1DB, 52GHZ,48.6DB;"
The conversion loss corrections are activated by the AMPCOR ON command; use AMPCOR OFF to
deactivate the function (be sure to manually enter a single-point conversion-loss value if AMPCOR has
been used).
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