R&S FSH
Setting the Frequency
1145.5973.12 4.5
E-11
The R&S FSH opens the list of channel tables loaded
via R&S FSH View.
Select the desired channel table with the rotary knob
or the cursor keys and switch it on with the SELECT
softkey.
The channel number together with the name of the
selected channel table (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. If you
exceed the definition of the channel table used, either "Minimum reached" is displayed on the screen
when the lowest channel number is reached or "Maximum reached" is displayed when the highest
channel number is reached. 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.
Channel numbers are assigned to frequencies as follows:
-
The first channel is assigned a channel number and a frequency.
-
All subsequent channels have ascending numbers.
-
The frequency spacing between channels is fixed. It can also be negative, i.e. the center frequency
of the R&S FSH decreases with ascending channel number.
-
In transmission systems containing gaps in the frequency range (as in the case of television, for
example), a channel table can comprise multiple ranges.
