Measurement Accuracy - Gigahertz Solutions FF10 Bedienungsanleitung

FF10
How to Select a Band Filter
Specific filters can be selected by tapping the touch switch at the
front panel of the Frequency Filter.
The power supply through the HF-Analyser is designed to feed
one filter at the time. For short periods of time the external power
supply can feed more filters (caution: this may cause the filter to
get hot). Even when using single filters the device may get luke-
warm, which is harmless.
Please note that technically it makes no sense to use the "broad-
band" and "LP 480 MHz" filter simultaneously or together with any
other filter.
How to Measure with the Filter
To assess the total exposure in a given space within a specific
band of the Frequency Filter, tap the touch switch of the desired
frequency band and follow the general instructions in the user
guide of your HF-Analyser.
To measure the emission of a single RF source, preferably use
a logarithmic-periodic directional antenna and select "Peak Hold,"
while slightly panning the antenna toward the general direction of
the RF source for at least several seconds to capture a reasonable
test result. In the case of RF signals with a high crest factor, we
recommend using a considerably longer measurement period.

Measurement Accuracy

Typical suppression of unwanted frequencies: min. 40-60 dB.
Exception: GSM/LTE1800 – Here the selectivity vs. DECT is better
than 20-30 dB.
No insertion loss in the pass band!
Max. additional measurement error: 0 to +3 dB.
The correction factors specified for the respective meters also ap-
ply to the filter for certain signals (e.g. UMTS or LTE).
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