
1 Setup
HP 3048A
PHASE
MODULATOR
DUT
<
POWER
SPLITTER
-10 dB
ATTEN
50 fi
LOAD
-i_n_n_r
OPTIONAL LINE
STRETCHER
2 Measuring Relative Spur Level
PHASE
MODULATOR
RF SPECTRUM
ANALYZER
DUT
40 dBc
-10 dB
ATTEN
AUDIO
SOURCE
3 Measuring Calibration Constant
PHASE
MODULATOR
HP 3048A
POWER
SPLITTER
DUT
-10 dB
ATTEN
—j_n_n_r~—
OPTIONAL LINE
STRETCHER
AUDIO
SOURCE
4 Restore Setup
PHASE
MODULATOR
HP 3048A
DUT
H<
POWER
SPLITTER
L_|
-10 dB
ATTEN
50 fl
LOAD
TJ~L_n_r
OPTiONAL LINE
STRETCHER
Figure 2-23. Setup Block Diagram for Double Sided Spur Calibration
2-82 Calibr Process: $N w/FM Discriminator
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