88 Chapter 2
Performance Verification Tests
12. Display Scale Fidelity
If the calibration data does not indicate an actual attenuation value
for the 0 dB setting, enter 0 dB.
NOTE The Agilent 8494G programmable attenuator has four attenuator
sections consisting of 1 dB, 2 dB, 4 dB, and 4 dB attenuators. If using
the Agilent 8494G programmable attenuator, enter the calibration data
for the section three, 4 dB step, rather than the section four, 4 dB step.
3. For each row in Table 2-13 and Table 2-14, add the 10 dB and the
1 dB Step Attenuator Actual Attenuation values (Columns 4 and 5)
and place the results into the Total Actual Attenuation (Column 6).
Example for –36 dB from REF LVL setting:
4. Enter the total actual attenuation (0 dB from the reference level)
below:
Total actual attenuation (0 dB from Ref Level) = __________ dB
Part 1: Log Display Scale Fidelity, Analog Bandwidths
Setup for Log Scale Measurement
1. Connect the equipment as indicated in Figure 2-12.
2. Press Preset on the analyzer. Press the Factory Preset softkey, if it is
displayed. Set the analyzer by pressing the following keys:
System, Alignments, Auto Align, Off
FREQUENCY, 50 MHz
SPAN, 45 kHz
BW/Avg, 3 kHz
BW/Avg, Video BW, 1 kHz
3. Preset the synthesized signal generator, then press Blue Key, Special,
0.0. Press the following keys:
FREQUENCY, 50 MHz
AMPLITUDE, +9 dBm
4. Set the 1 dB step attenuator to 0 dB.
5. Set the 10 dB step attenuator to 0 dB.
Total Actual Attenuation 1 dB Step Attenuator Actual Attenuation
10 dB Step Attenuator Actual Attenuation+
=