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Chapter 2 93
Performance Verification Tests
12. Display Scale Fidelity
Calculate incremental log fidelity:
Calculate the Incremental Log Fidelity Error (ILFE) for dB from REF
LVL settings of –4 dB to
−80 dB using the current and previous
Cumulative Log Fidelity Errors (CLFEs):
Record the result in the performance verification test record as
indicated in Column 9 of Table 2-14.
Part 3: Linear Display Scale Fidelity, Analog
Bandwidths
Setup for linear scale measurement:
1. 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
–64 60 4 58) 83)
–68 60 8 59) 84)
–72 70 2 60) 85)
–76 70 6 61) 86)
–80 80 0 62) 87)
–84 80 4 63) NA
–88 80 8 64) NA
–92 90 2 65) NA
–96 90 6 66) NA
–98 90 8 67) NA
Table 2-14 Cumulative and Incremental Log Scale Fidelity Worksheet,
Option 1DR Narrow Resolution Bandwidths
Column
1
Column
2
Column
3
Column
4
Column
5
Column
6
Column
7
Column
8
Column
9
dB from
REF
LVL
(dB)
10 dB
Step
Atten
Nominal
Attenu-
ation
(dB)
1 dB
Step
Atten
Nominal
Attenu-
ation
(dB)
10 dB
Step
Atten
Actual
Attenu-
ation
(dB)
1 dB
Step
Atten
Actual
Attenu-
ation
(dB)
Total
Actual
Attenu-
ation
(dB)
Marker
Delta
(∆ Mkr1)
Reading
(dB)
Test
Record
Entry –
CLFE
(dB)
Test
Record
Entry –
ILFE
(dB)
ILFE CLFE current()CLFE previous()–=