Agilent Technologies E1401-90493 - page 144

144 Chapter 2
Performance Verification Tests
19. Overall Absolute Amplitude Accuracy: Agilent E4401B and E4411B
3. Zero and calibrate the power meter and power sensor connected to
Channel A of the power meter.
75 Ω Inputs: Zero and calibrate the power meter and 75 Ω power sensor
connected to Channel A of the power meter.
Figure 2-21 Measure Source Test Setup
4. Connect the equipment as shown in Figure 2-21. The power sensor
should connect directly to the 6 dB fixed attenuator using an
adapter.
75 Ω Inputs: Use the minimum loss pad in place of the 6 dB fixed
attenuator and a 75 Ω Type-N (f) to Type-N (f) adapter.
5. Preset the synthesized signal generator. Manually press Blue Key,
Special, 0, 0. Set the signal generator as follows:
FREQUENCY, 50 MHz
AMPLITUDE, 12 dBm
6. Set the 10 dB and 1 dB step attenuators to 0 dB.
7. Obtain the actual attenuation for the 0 dB setting of each attenuator
at 50 MHz from the metrology data for the step attenuators. In some
cases this value might be zero, by definition. Add the two actual
attenuations to obtain the 0 dB reference attenuation.
For example, if the actual attenuation for the 10 dB step attenuator
is 0.03 dB, 10 dB Actual0dB is 0.03 dB. If the actual attenuation for
the 1 dB step attenuator is 0.02 dB, 1 dB Actual0dB is 0.02 dB. In this
case RefAtten0dB is 0.05 dB.
RefAtten0dB 10 dB Actual0dB 1 dB Actual0dB +=