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5. DESCRIPTION
5.1.
GENERAL
An overall block diagram of the Heterodyne Analyzer Type 2010,
considerably simplified, is shown in Fig.5.1, while more detailed block
diagrams for the different sections are shown in Figs.5.2, 5.3, 5.7, and 5.10.
Signal
Input
Input
Amplifier
Ext.
Filter
Beat
Frequenc,..__._ _ _ _ _ _ _ _ _
~
.----------4
Oscillator
Compressor
1------o-------o
.
Input
Fig.5.1. Simplified Block Diagram of 2010
BFO
Output
17/SOJ
The signal for analysis enters the analyzer at the input (either Dl RECTor
PREAMP. input), and is fed to the first mixer stage via the input attenuator
and amplifier. In this first stage it is mixed with the signal from the voltage
controlled oscillator (V.C.O.). The V.C.O. has a frequency which is adjust-
able in the range 1.0 MHz to 1.2 MHz in order to produce a 1.2 MHz signal
after mixing with the frequency of interest in the input signal. The new
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