Audio Analysis Of Modulation; Use Of Signal Outputs - Gigahertz Solutions HFW59D Instruction Manual

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Audio Analysis of Modulation

The audio analysis of the modulated portion of the HF signal helps
to identify the source of a given HF radiation signal. There is a
selection of audio samples on our homepage (high frequency me-
ters).
How to proceed:
For audio analysis, simply turn the volume knob of the speaker at
the top of the case all the way to the left ("-"). If you are switching
to audio analysis while high field strength levels prevail, high vol-
umes can be generated quite suddenly. This is especially true for
measurements which are to be taken without audio analysis. The
knob is not fastened with glue to prevent over winding. However,
if by accident you should turn the knob too far, simply turn it back
again. No damage will be caused.
The volume can be controlled with the "audio" knob. Note: The
power consumption of the speaker is directly proportional to the
volume.

Use of Signal Outputs

AC output:
The AC output "PC/head-set", 3.5 mm jack socket, is meant for
in-depth analysis of the AM/pulsed content of the signal by head-
set.
DC output
(2.5 mm jack socket):
For a (longterm) recording of the display value. When "Full Scale"
is displayed, it has 1 VDC output.
The normal auto power off function is automatically deactivated
as soon as external devices are connected, and is only automati-
cally reactivated if a total discharge is imminent.
Further Analysis /
Optional Accessories:
Available from Gigahertz Solutions:
 For increasing the measurement range of the HFW59D:
Preamplifier HV10 for measuring very weak HF signals with a
higher resolution.
Attenuator DG20_G3 for measuring extra strong HF signals.
 HF-Analysers < 2,4 GHz
 Meters for the low frequencies: Also for this frequency range,
Gigahertz Solutions offers a broad range of professional meas-
urement technology. The new NFA series, for instance, which
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