Agilent Technologies 8935 Series, Руководство пользователя

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Chapter 10 299
Block Diagrams
CDMA Analyzer Section
CDMA Analyzer Section
IF Conversion
To down convert the CDMA the signal, the 114.3 MHz IF is mixed with
a 110.6136 MHz LO to produce a 3.6864 MHz IF in the A2A120 LO
IF/IQ Modulator assembly, see
Figure 10-11 on page 300 . The oscillator
that produces the LO signal is phase locked to a 10 MHz signal from the
A2A100 CDMA Generator Reference assembly, see
Figure 10-13 on
page 303 .
CDMA Signal Analysis
The 3.6864 MHz signal goes to the A2A36 Receive DSP assembly, see
Figure 10-12 on page 301 . The Receive DSP assembly analyzes the
3.6864 MHz signal to make IQ modulation measurements, such as rho,
timing accuracy, carrier feed through, and phase error.
Power Measurements
The A2A36 Receive DSP assembly also makes average power
measurements through a direct link from the A2A130 RF Input/Output
assembly.