Digital High Frequency Analyser HF W 35C
© Gigahertz Solutions GmbH, 90579 Langenzenn, Germany
Revision 4.7 (October 2007)
Page
3
Getting Started
Connecting the Antenna
Screw the angle SMA-connector of the an-
tenna connection into the uppermost right
socket of the HF analyzer. It is sufficient to
tighten the connection with the tightening
aid. Do not use a wrench or other tools be-
cause over tightening may damage the
threads.
The radiation in the frequency rang of this
instrument are normally vertically polarized.
An orientation of the antenna suitable for this
is as shown in the following picture:
Do not twist the antenna cable
or bend it sharply!
For horizontal orientation of the antenna you
should rotate the instrument rather than
twisting the cable. The LED at the front of the
antenna indicates a good connection, which
is essential for an accurate measurement!
Do not touch the cable while measuring.
Remarks concerning the antenna
The SMA connector of the antenna to the
instrument of the highest industrial quality
available. Also the “semi rigid” cable has the
best technical parameters in the instrument’s
frequency range. It is designed for several
hundred changes of orientation without ef-
fects for the accuracy of the measurement.
For the special design of the second con-
necting cable we have a patent pending. The
objective is to reduce an inherent weakness
of “simple-log.per” antenna designs made of
PCB material. For radiation incoming at an
angle to the main direction normal designs
pick up signals also below the design fre-
quency range, which can falsify the meas-
urement. This antenna suppresses this by 15
to 20 dB in addition to the approx. 40 dB of
the high pass filter.
Checking Battery Status
When the “LOW BATT“ indicator appears in
the center of the display, measurement val-
ues are not reliable anymore. In this case the
battery needs to be changed.
If there is nothing displayed at all upon
switching the analyzer on, check the connec-
tions of the battery. If that does not help try a
new battery.
Remember that rechargeable batteries only
have about a quarter of the capacity of the
recommended AlMn-batteries.
Note
Each time you make a new selection (e.g.
switch to another measurement range) the
display will systematically overreact for a
moment and show higher values that droop
down within a couple of seconds.
The instrument is now ready for use.
In the next chapter you will find the basics
for true, accurate HF-measurement
.
