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()–=