SINAD
The SINAD function is selected by pressing the FUNCTION
THD+N/SINAD key twice, or only once if THD+N mode has already
been selected. It is only available in analog analyzer mode.
The SINAD function is similar to THD+N except that the sign of the
result (always in dB) is reversed. For example, a 12 dB SINAD
measurement corresponds to a –12 dB THD+N measurement.
The SINAD reading is shown in the top left corner of the display. The
units cannot be changed. The top center of the display shows the
amplitude of the signal before filtering. The amplitude units may be
selected by pressing the top center soft key.
The INPUT A and INPUT B keys select the channel to be measured,
and select between the input connectors and the gen-mon path.
Figure 4-19. Main panel in SINAD function
FREQUENCY
COUNTER
NOTCH
FILTER
WEIGHTING
FILTERS
PRIMARY
READING
DETECTOR
BANDWIDTH
LIMITING
FILTERS
GENERATOR MONITORS
B
A
INPUT
RANGING
INPUT
TERMINATION
INPUT
TERMINATION
LCD DISPLAY
AVERAGING
SECONDARY
READING
DETECTOR
INTERNAL
JUMPER
INPUT
MONITOR
SPEAKER/
HEADPHONE
READING
MONITOR
CHANNEL A
CHANNEL B
Figure 4-20. Block Diagram of Analog SINAD measurement
4 Functions
Function Descriptions SINAD
ATS-1 Dual Domain User's Manual 4-21
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