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Chapter 2 95
Performance Verification Tests
12. Display Scale Fidelity
Table 2-15.
11.Calculate the Linear Fidelity Error (LFE) as a percentage of
reference level (RL), and record the result in the performance
verification test record as indicated in Column 9 of Table 2-15.
Example calculation for LFE(% of RL):
Part 4: Linear Display Scale Fidelity, Digital
Bandwidths
This section is for analyzers with Option 1DR (narrow resolution
bandwidths) only.
LFE % of RL()100
Actual Mkr Reading Ideal Mkr Reading–
223.6 mV
----------------------------------------------------------------------------------------------------
×=
Actual Mkr Reading 85.0 mV=
Ideal Mkr Reading 89.3 mV=
LFE %of RL()100
85.0 89.3–
223.6
---------------------------
×=
LFE %of RL()1.92% of RL=
Table 2-15 Linear Scale Fidelity Worksheet, Analog Resolution
Bandwidths Measured at 3 kHz
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)
Ideal
Mkr
Reading
(mV)
Actual
Mkr
Reading
(mV)
Test
Record
Entry –
LFE
(% of
RL)
0 (Ref) 0 0 0 (Ref) 0 (Ref) 0 (Ref)
–4 0 4 93)
–8 0 8 94)
–12 10 2 95)
–16 10 6 96)
–20 20 0 97)