Amplitude Accuracy - HP 84125A User Manual

Amplitude Accuracy

Amplitude Accuracy (typical)
1.0 to 2.9 GHz
2.75 to 6.5 GHz
6.0 to12.8 GHz
12.4 18.0 GHz
18.0 to 22.0 GHz
22.0 to 26.5 GHz
The table below shows the typical amplitude uncertainty for the
HP 84125A/B system. The following conditions must be met to assure
the amplitude accuracy of your system.
1. The HP 84125A/B system has been warmed up for 30 minutes or
more at a stable temperature between 20
2. The EMC analyzer has successfully completed a full self calibration.
3. The HP 84125A/B system has valid calibration data.
4. The HP 84125A/B system has the correct correction data loaded for
the selected antenna and frequency range.
5. The measurement is made with the EMC analyzer in Linear Scale
mode with a resolution bandwidth (RBW) of 1 MHz.
6. While the measurement is made, the EMC analyzer reference level
is kept at > 56 dB  V/m when using the 1 to 18 GHz antenna, or
> 48 dB  V/m when using the 18 to 26.5 GHz antenna.
7. While the measurement is made, the measured signal is kept within
the top four divisions (that is, the top half) of the display.
These conditions should work in most measurement situations.
However, if conditions 5, 6, or 7 cannot be met, the measurement
uncertainty should be calculated using the method detailed in
Appendix A.
6.10 dB
6.18 dB
6.29 dB
6.43 dB
4.28 dB
5.36 dB
 C and 30  C.
Speci cations and Characteristics 2-5