HP 8924E, Сборка

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184
Chapter 5, HP 8924C Performance Verification
AF Analyzer Distortion, SINAD, and SNR Accuracy Performance Test 16
N:\mkt\MANUALS\HP8924C\ALR\24c_pt.fb
Procedure
1. Access the AF ANALYZER screen and set
Filter 2
to
15 kHz LPF
.
2. Set the
AF Anl In
field to
Audio In
.
3. Access the RF GENERATOR screen and set the
AF GEN 1 TO
and
AF GEN2
to
fields to
Audio Out
.
4. Set
AFGen1 Freq
to
1 kHz
and the
AFGen1
level to
1 V
.
5. Set
AFGen2 Freq
to the Harmonic frequencies shown in the PTR ( see "AF
Analyzer Distortion, SINAD and SNR Accuracy Performance Test 16" on page
337
), and the
AFGen2
level to the distortion product levels shown in the PTR.
6. Measure the distortion and SINAD at each frequency and level, and compare the
measured results with the limits shown in the PTR.
7. Measure the SNR (Signal to Noise Ratio) at each harmonic and level shown in the PTR.
Compare the results to the limits shown in the PTR.
AFGen2 Freq
AFGen2 To
RF Gen Freq
Amplitude
Atten Hold
Output Port
AFGen 1 Freq
AF Gen1 To
FM Coupling Audio Out
Mic Pre-Emp
Mod In To
To Screen
TX Frequency
TX Power
RF GENERATOR
AC Level
AF Anl In
Filter 1
De-Emphasis
Detector
To Screen
TX Frequency
TX Power
AF ANALYZER
AC Level
Filter 2
Settling
Pk Det To
Speaker Vol
Speaker ALC
Scope To
Gain Cntl
Input Gain
Notch Gain
Notch Freq
De-Emp Gain
Audio In Lo
Ext Load R
DC Current
AF Cnt Gate
Select Audio In
Select Distn or
Select 15kHz LPF
Actual
Level (1V)
Frequency (1 kHz)
Harmonic Frequency
Level (V)
SINAD or SNR
Select Audio Out
Measurement: AF ANALYZER
Source: RF GENERATOR
Measurement