52
Sidekick
®
Plus Test Set
Voiceband Spectrum Analyzer
A spectral graph for analysis of power influence and
noise may be accessed through the NOISE/PI function.
This graph will be useful in determining the types of
noise, frequency of the noise in the voiceband, and the
amplitude at each frequency. To access the SPECTRUM
ANALYZER test, use the up (
2
) and down (
8
) arrows
on the keypad to highlight the required measurement.
Press
F1 Spectrum
to see the result displayed as a
real-time graph. The default may be changed from dBm
to dBrn in the configuration settings.
Power Influence
This measurement shows the Power Influence affecting
the circuit across the voiceband up to 4 kHz. To use
the Power Influence Spectrum Analyzer, perform the
following:
1. Connect the test leads: black to tip, red to ring, and
green to ground.
2. Select the Power Influence display using the up (
2
)
and down (
8
) keys.
3. Press
F3 Dial
to dial a quiet line termination. A
previously saved number can also be dialed from
the memory by pressing
F2 Phone Book
.
4. Once connected, select
F1 Spectrum
to enter
spectrum analyzer.
The value of the measured POWER INFLUENCE at the
cursor position is shown in the top right of the screen in
dBrn. The total Power Influence across the bandwidth is
shown at the bottom left in dBrnC.
The cursor position may be moved using the left (
4
) and
right (
6
) arrows on the keypad.
The following function keys are available in this screen:
•
F1 Spectrum
returns to the summary screen.
•
F2 Phone
allows the user to dial a number.
•
F3 Peak
enables a peak-hold function to capture fast
moving signals.
The
*
key will display a marker and allow the user to
navigate to a point of interest. The
#
key pauses the
display until it is pressed again.
