What does Agilent mean with "IF Phase Ripple"

Guest
I am working as a measuring engineer calibrating measuring equipment
like spectrum analyzers.
Now have I run in to some trouble when trying to calibrate option B7J,
Digital demodulation hardware, on Agilents High-Performance Spectrum
Analyzer E4440A

Look at this page:
http://calsw.tm.agilent.com/PSA/Help/n7810a.htm#Performance/ifphaserip.htm

The description reads:
"This test is a functional test. The IF Phase Ripple is measured in
order to meet the EVM specification listed for various Digital Comms
personalities. In this test the source is set to output 64 tones in
groups of 8 tones which are generated synchronously. The tones are
measured in groups to reduce error due to noise. An algorithm is
applied to the measurement data to determine the relative phase
between the tones."

Does anyone have any idea about what kind of algorithm that Agilent is
referring to in this measurement?
Have anybody heard about this measuring method using 64 tones to
verify IF phase ripple?
 
As the person that controls the server for the calsw.tm website, I can't
really provide you with the technical details, but I can tell you who to
write to. This will be the email for the manager of that group; he can
probably then answer this question or forward it to someone that knows.
His slightly-scrambled email is mark_catelani (-at-) agilent.com.

cv


andreas.yrvenback@telia.com wrote:
I am working as a measuring engineer calibrating measuring equipment
like spectrum analyzers.
Now have I run in to some trouble when trying to calibrate option B7J,
Digital demodulation hardware, on Agilents High-Performance Spectrum
Analyzer E4440A

Look at this page:
http://calsw.tm.agilent.com/PSA/Help/n7810a.htm#Performance/ifphaserip.htm

The description reads:
"This test is a functional test. The IF Phase Ripple is measured in
order to meet the EVM specification listed for various Digital Comms
personalities. In this test the source is set to output 64 tones in
groups of 8 tones which are generated synchronously. The tones are
measured in groups to reduce error due to noise. An algorithm is
applied to the measurement data to determine the relative phase
between the tones."

Does anyone have any idea about what kind of algorithm that Agilent is
referring to in this measurement?
Have anybody heard about this measuring method using 64 tones to
verify IF phase ripple?
Click to expand...
 
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