Use Of Signal Outputs - Gigahertz Solutions HF59B Bedienungsanleitung

M a d e in G e r m a n y
The volume can be controlled with the "audio" knob. Note: The power
consumption of the speaker is directly proportional to the volume.
For a quantitative differentiation of the various radio services, we can
offer selective frequency filters.
Analysis of the modulated / pulsed signal compo-
nent (Full/Pulse)
The little switch at the right of the display allows to distinguish between
the complete signal including the pulsed part and its pulsed or modu-
lated part only.
As most of the presently used signals have a modulation of 100%,
there is mostly only little difference between the two switch settings.
Especially in the case of very low field strengths (only few µW/m²),
we recommend to use the "Pulse" setting as the instrument noise
is more than a factor 10 lower in this setting than in the "Full"
setting.
Marking of CW signals
Un-pulsed signals by their very nature are not audible in the audio anal-
ysis and therefore easily missed. For that reason, they are marked by
a uniform "rattling" tone, with its volume proportional to its contents of
the total signal. This "marking" has a frequency of 16 Hz, and is also
available as audio sample on our website (see "Sound Samples").
Note concerning the switch setting "Pulse":
Under special laboratory conditions a signal can be created, which causes an addi-
tional deviation from the actual value of up to -3 dB. However, commercially used mod-
ulations under field conditions will only show minimal deviations.

Use of Signal Outputs

AC output:
The AC output "PC/headset" (3.5 mm jack socket) is meant for an in-
depth analysis of the AM/pulsed content of the signal by headset or a
corresponding PC-audiocard.
DC output (2.5 mm jack socket):
The DC output is meant for a long-term recording of the display value.
If "Full Scale" is displayed, it has 1 or 2 VDC output. Our data loggers
NFA1000 and NFA30M are perfectly suitable for this.
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