Block Diagrams
This section contains several diagrams to assist your understanding of
how the ATS-1 Dual Domain accomplishes its measurement tasks.
While knowledge of the internal circuitry is not required for operation
of the instrument, it may be more intelligently applied, and its
limitations may be better understood, by referring to these diagrams.
Analog Section
Figure 1-6 is a simplified block diagram of the analog section of the
ATS-1 Dual Domain.
The generator consists of a sinewave and squarewave generator
transformer-coupled to the output connectors. When the IMD option
is present, a second sinewave oscillator is added. Its output is
summed with the main oscillator to provide the necessary two-tone
signal. With the IMD waveform selected, the rear panel Analog
Trigger output carries the lower-frequency tone of the IMD tone pair
for oscilloscope triggering.
The analog analyzer consists of two identical wide-range autoranging
preamplifiers, a principal meter with filters, a secondary meter, a wow
and flutter discriminator, and phase and frequency meters.
The principal meter consists of a switchable and tunable bandpass or
bandreject filter, additional amplification, built-in high-pass and
low-pass filters, built-in CCIR and A-weighting filters, and two sockets
for optional filters. The bandreject is used in THD+N and SINAD
functions. The bandpass filter is used in the SELECTIVE modes of
the AMPLITUDE and NOISE functions and in the XTALK function.
The output of either the principal meter or the wow and flutter
discriminator feeds the primary reading detector. The primary
detector, depending on the measurement function and setup
parameters of that function, may have true RMS, average, or
quasi-peak response. The primary reading is normally displayed in
the upper-left corner of the display on the Main panel or Analyzer
Only panel and graphed with solid lines in sweeps of all functions
except PHASE.
1 Description
Block Diagrams Description
1-10 ATS-1 Dual Domain User's Manual
To Next Page
Loading...
Need help?
General
