Chapter 2 133
Performance Verification Tests
17. Absolute Amplitude Accuracy (Reference Settings): Agilent E4401B and E4411B
BW/ Avg, Resolution BW, 1 kHz (Man)
BW/Avg, Video BW, 1 kHz (Man)
AMPLITUDE, More, Y Axis Units, dBm (50Ω Input only)
AMPLITUDE, More, Y Axis Units, dBmV (75Ω Input only)
AMPLITUDE, Ref Level, −25 dBm (50Ω Input only)
AMPLITUDE, Ref Level, +28.75 dBmV (75Ω Input only)
AMPLITUDE, Attenuation, 10 dB
AMPLITUDE, Scale Type (Log)
Det/Demod, Detector, Sample
9. Press AMPLITUDE, More, Y Axis Units (or Amptd Units), Volts.
10.Press Peak Search (or Search).
11.Convert the marker amplitude reading from Volts to dBm using the
appropriate equation below:
Marker Amptd (dBm) ________ dBm
12.Subtract the Corrected Power Meter Reading noted in step 7 from
the Marker Amptd (dBm) recorded in step 11. Record the difference,
Absolute Amplitude Accuracy (Log), as TR Entry 1 in the
performance verification test record:
Absolute Amplitude Accuracy (Log) = Marker Amptd (dBm) −
Corrected Power Meter Reading (dBm)
13.Press AMPLITUDE, Scale Type (Lin), More, Y-Axis Units (or Amptd
Units), Volts .
14.Press Peak Search (or Search).
15.Convert the marker amplitude reading from Volts to dBm using the
appropriate equation below:
Marker Amptd (dBm) ________ dBm
16.Subtract the Corrected Power Meter Reading noted in step 7 from
the Marker Amptd (dBm) recorded in step 15. Record the difference,
Absolute Amplitude Accuracy (Lin), as TR Entry 2 in the
performance verification test record:
50Ω Input Marker Amptd (dBm) =10 log10
×Mkr V2
0.05
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⎝⎠
⎛⎞
⎝⎠
⎛⎞
75Ω Input Marker Amptd (dBm) =10 log10
×Mkr V2
0.075
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⎝⎠
⎛⎞
⎝⎠
⎛⎞
50Ω Input Marker Amptd (dBm) =10 log10
×Mkr V2
0.05
----------
⎝⎠
⎛⎞
⎝⎠
⎛⎞
75Ω Input Marker Amptd (dBm) =10 log10
×Mkr V2
0.075
-------------
⎝⎠
⎛⎞
⎝⎠
⎛⎞