User manual

Digital High Frequency Analyser HF58B-r
© Gigahertz Solutions GmbH, 90579 Langenzenn, Germany Revision 4.5 (Febuary 2006) Page 14
Changing the rechargeable Battery
The battery compartment is at the back of
the analyzer. To remove the lid, press on the
grooved arrow and pull the cap off. Insert
only rechargeable batteries. If you use
regular alkaline (non – rechargeable) bat-
teries do not
use a charger or AC-adapter!
Auto-Power-Off
This function conserves energy and extends
the total operating time.
1. In case you have forgotten to turn OFF
the HF analyzer or it has been turned ON
accidentally during transport, it will shut
off automatically after 40 minutes of con-
tinuous use.
2. If “low batt” appears vertically between
the digits in the center of the display, the
HF analyzer will turn OFF after 3 min in
order to avoid unreliable measurements.
In that case charge the rechargeable
battery.
3. The built-in function, Auto-Power-Off,
will only be de-activated by plugging in a
2.5mm jack into one of the output sock-
ets AC or DC, see “Conditioning…” two
sections up. The function will be re-
activated to automatically prevent total
discharging of the battery by further op-
eration.
Remediation and Shielding
Please call us or send us an e-mail.
We will assist you in any shielding project
you might have.
The shielding effect of the various materials
is stated normally in “- dB”, e.g. “– 20 dB”.
Conversion of shielding effect into reduction
of power density
„-10dB“ is measured value divided by 10
“-15dB” is measured value divided by ~30
”-20dB” is measured value divided by 100
”-25dV” is measured value divided by ~300
”-30dB” is measured value divided by 1000
etc.
Please be aware of the manufacturer’s notes
about the normally achievable shielding ef-
fects, as 100 % shielding is almost always
impossible. Partial shielding reduces the at-
tenuation considerably. That is why shielding
of seemingly radiation tight adjacent areas is
highly recommended.