Setting the Frequency R&S FSH
1309.6275.12 4.4 E-2
If you enter a stop frequency on the R&S FSH which exceeds the maximum stop frequency of the
i
nstrument model, the R&S FSH will set the stop frequency to the maximum permissable stop
frequency. If you reach this frequency limit with the rotary knob or the cursor keys, the R&S FSH will
ignore any further rotary ticks or cursor steps.
Working with channel tables
Almost all transmission systems divide their assigned frequency ranges into channels, with a specific
frequency assigned to each channel. The R&S FSH therefore allows users to define channel
assignments using familiar terms to keep operation simple.
Channel tables are defined with the R&S FSH4View software and loaded into the spectrum analyzer.
The R&S FSH can store more than 100 different channel tables which can be activated from the front
panel as required. The maximum number of channel tables may be reduced if transducer factors, cable
models, limit values or data sets are stored simultaneously (see "Saving and Loading Instrument
Settings and Measurement Results" in this chapter)
The R&S FSH4View software operating manual describes how to generate channel tables.
Switching to channel entry:
Press the FREQ key.
Press the FREQ MODE softkey.
Select CHANNEL from the menu with the rotary
knob or the cursor keys and confirm with the ENTER
key.
The R&S FSH opens the list of channel tables loaded
via R&S FSH4View.
Select the desired channel table with the rotary knob
or the cursor keys and switch it on with the SELECT
softkey.
If necessary the table entries can be sorted using
names/date/size. In addition table entries, which are
incompatible with the current instrument settings,
can be blanked out.
The channel number together with the name of the
selected channel (e.g. GSM UL Ch: 1) is now
displayed instead of the center frequency. The
FREQUENCY softkey is now called CHANNEL.
The R&S FSH center frequency is the frequency corresponding to the displayed channel number from
the channel table. The R&S FSH accepts only channel numbers when entering the center frequency.
Tuning the frequency with the rotary knob or the cursor keys is also done using channel numbers. All
other measurement parameters such as SPAN or RBW (resolution bandwidth) are user-selectable as
with the entry of frequencies.
The entries for the start frequency (START FREQ) and the stop frequency (STOP FREQ) are inactive
when defining channels.
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