Handheld Spectrum Analyzer ¸FSH
6
Channel tables
If preferred, the ¸FSH can be tuned by channel numbers rather than by
entering the frequency. The channel number is displayed instead of the center
frequency. Users who are accustomed to channel assignments, which are
common in TV and mobile radio applications, can operate the ¸FSH more
easily. The channel tables are generated with the ¸FSH View software
and loaded into the ¸FSH. The ¸FSH includes TV channel tables for a
number of countries
Receiver mode
When equipped with the option ¸FSH-K3, the ¸FSH can be operated
as a receiver for monitoring and precompliance EMC applications. Measure-
ments are performed at a predefined frequency with a user-selectable measure-
ment time. In the scan mode, the ¸FSH sequentially measures each level
at various frequencies defined in a channel table. The channel tables are
generated with the ¸FSH View software and loaded into the ¸FSH. For
a few TV transmitter and mobile radio standards, the tables are predefined. In
addition, the CISPR bandwidths 200 Hz, 9 kHz, 120 kHz and 1 MHz are available
for EMI emission measurements. The ¸FSH offers peak, average, RMS and
quasi-peak detectors.
C/N measurements
The ¸FSH offers a carrier/noise (C/N) measurement for determining the
ratio of carrier power to noise power or carrier power to noise power density.
The ¸FSH supports three different modes for carrier power measurement.
In the CW TX mode, the ¸FSH determines the power of an unmodulated
carrier. In the digital TX mode, it determines the channel power of a reference
channel, as is common with digitally modulated carriers (e.g. the DAB, DVB,
DVB-T, DVB-H and J.83/A/B/C standards). Furthermore, the ATSC standard for
digital terrestrial television with 8VSB modulation is supported. In the analog
TV mode, the ¸FSH measures the peak power of the vision carrier with
amplitude-modulated TV signals.
