
Chapter 8 223
Performance Tests
CDMA Generator Modulation Accuracy Performance Test 26
CDMA Generator Modulation Accuracy
Performance Test 26
The purpose of this test is to verify that the Test Set meets the
specification limits in PTR (Performance Test Record) Table 9-26,
“CDMA Generator RF In/Out Test,” on page 277. The modulation
accuracy of the CDMA generator is directly measured with a vector
signal analyzer at the DUPLEX OUT port. Because the vector signal
analyzer cannot measure rho directly, the modulation accuracy is
measured in EVM (Error Vector Magnitude) % rms and rho is
calculated from the EVM data.
Setup
Figure 8-31 CDMA Generator Modulation Accuracy Test 26
Procedure
1. On the Test Set:
a. Press
Preset.
b. Press
CDMA GEN key
c. Set RF Gen Freq to 836.52 MHz.
d. Set CW RF path to IQ.
e. Set Output Port to Dupl.
f. Set Amplitude to
−10 dBM.
g. Set Gen Dir to Rev.
DUPLEX OUT
Vector Signal Analyzer
INPUT
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