16-3
Measurement Theory
Introduction
DSP ANL
• A23 Input
• A11 Receiver Mixer
• A16 Receiver
• A9 Global Test and Demod
The DSP analyzer measurements digitally analyze the signal under test. The signal is
leveled and converted to a 10.7 MHz IF and routed to the A9 Global Test and Demod
assembly where the signal is digitized and the actual measurements are made. After the
measurementis done the measurement numbers are sent to the A7 Controller to be sent to
the display section.
OUT RF SP
• A23 Input
• A11 Receiver Mixer
• A16 Receiver
• A18 Spectrum Analyzer
• A19 Measurement
The output RF spectrum is a GSM required measurement that is a zero span spectrum
analyzer measurement at specific offsets from the carrier frequency. Refer also to the
SPEC ANL description.
PULSE
• A23 Input
• A11 Receiver Mixer
• A16 Receiver
• A18 Spectrum Analyzer
• A19 Measurement
The pulse measurement is used to measure the −70 dB point of a GSM pulse because the
DSP analyzer will only measure to−30 dB. This is a spectrum analyzer measurement.
Refer also to the SPEC ANL description.