16-4
Measurement Theory
Introduction
CW MEAS/AF ANALYZER
• A23 Input
• A19 Measurement
• A11 Receiver Mixer
• A16 Receiver
• A3 Audio Analyzer 1
• A2 Audio Analyzer 2
• A4 Modulation Distribution
TheCW measurements are power and frequency. For the power measurement, the detector
is in the A23 Input assembly and is measured by the voltmeter in the A19 Measurement
assembly. The AF analyzer measurements are either demodulated signals that pass
throughthe A23 Input, A11 Receiver Mixer, and A16 Receiver assemblies or internal and
external audio signals that pass through the A4 Modulation Distribution assembly before
being routed to the A3 Audio Analyzer 1 assembly. The A3 Audio Analyzer assembly
eitherpasses the signals to the A19 Measurement assembly or to the A2 Audio Analyzer 2
assembly before routing to the A19 Measurement assembly. After the measurement is
done the measurement numbers are sent to the A7 Controller to be sent to the display
section.
SCOPE
The oscilloscope has the AF analyzer as a front end so the routing configurations that can
be done for the AF ANALYZER are also possible for oscilloscope measurements. The
A19 Measurement assembly makes the oscilloscope measurements. After the
measurementis done the measurement numbers are sent to the A7 Controller to be sent to
the display section.
SPEC ANL
• A23 Input
• A11 Receiver Mixer
• A16 Receiver
• A18 Spectrum Analyzer
• A19 Measurement
Thespectrum analyzer signal receives its signal from the RF input stages after the signal is
converted to a 114.3 MHz IF in the A16 Receiver assembly. The A18 Spectrum Analyzer
assembly works together with the A19 Measurement assembly. The A18 Spectrum
Analyzer receives sweep and trigger signals from the A19 Measurement assembly and
returns analog level signals to the A19 Measurement assembly. The A19 Measurement