94 Chapter 2
Performance Verification Tests
12. Display Scale Fidelity
SPAN, 10 kHz
BW/Avg, 3 kHz
AMPLITUDE, Scale Type (Lin)
Input/Output (or Input), Input Z Corr (50) (75 Ω Input only)
2. Preset the synthesized signal generator, by pressing Blue Key,
Special, 0, 0. Press the following keys:
FREQUENCY, 50 MHz
AMPLITUDE, –3 dBm (50 Ω Input only)
AMPLITUDE, 4 dBm (75 Ω Input only)
3. Set the 1 dB step attenuator to 0 dB.
4. Set the 10 dB step attenuator to 0 dB.
5. Press Peak Search (or Search) on the analyzer.
6. Adjust the synthesized signal generator amplitude until the
analyzer marker amplitude reads 223.6 mV ±4 mV.
NOTE Do not adjust the amplitude of the synthesized signal generator after
the reference is established.
Calculate ideal marker amplitude:
7. Considering Total Actual Attenuation at the 0 dB from REF LVL
setting to be ATref, and the Total Actual Attenuation at any other dB
from REF LVL setting to be ATmeas, calculate the Ideal Mkr
Reading, in millivolts, as follows, and enter the result in Column 7 of
Table 2-15.
For example, if ATref = 0.012 dB and ATmeas = 7.982, the Ideal Mkr
Reading for the −8 dB from Ref Level setting would
be:
Measure Linear Fidelity:
8. Perform step 9 to step 11 for each measurement value in
Table 2-15.
9. Set the 1 dB and 10 dB step attenuators as indicated in Column 2
and Column 3 of Table 2-15 for the dB from REF LVL settings.
10.Press Peak Search (or Search) on the analyzer and record the marker
delta (∆ Mkr1) amplitude reading as the actual Mkr reading in
Column 8 of
Ideal Mkr Reading mV()1000 0.05 10×ATmeas–ATref+()10⁄
=