Specifications

Setting and Using the Measurement Functions R&S FSH
1145.5973.12 4.60 E-10
Setting the noise channel:
The noise channel is set by entering the channel number in accordance with the selected
channel/frequency table, or by entering the channel center frequency, the vision carrier frequency or the
8VSB/ATSC pilot frequency.
¾ Press the NOISE MEASURE softkey.
The R&S FSH starts the noise channel measurement
in the noise channel last set and opens the NOISE
MEASURE menu for setting a new channel.
¾ Using the rotary knob or the cursor keys, select the
desired noise channel entry and confirm your choice
with the ENTER key or the NOISE MEASURE
softkey.
The appropriate entry field opens.
¾ Using the numeric keys, enter the channel or the
frequency of the desired transmission channel and
terminate your entry with the appropriate unit key or
the ENTER key.
The R&S FSH displays the frequency spectrum of the
noise channel as symmetrical to the channel center.
You can alternatively enter the channel center frequency using the FREQ key.
Setting the noise channel bandwidth:
Enter the noise channel bandwidth with the CHANNEL BW softkey. Make the entry after the noise
channel measurement has been activated. This is the case when the NOISE MEASURE softkey is
highlighted in green.
Note: During the reference channel measurement, the REF MEASURE softkey is highlighted in green.
The R&S FSH indicates the channel limits by means of two vertical display lines.
¾ If the noise channel measurement is active, press
the CHANNEL BW softkey.
The R&S FSH opens the entry box for the channel
bandwidth (CHAN BW) with the noise channel
bandwidth just selected.
¾ Using the numeric keys, enter the noise channel
bandwidth and terminate your entry with the
appropriate unit key, or
¾ Set the noise channel bandwidth with the rotary
knob or the cursor keys.
The R&S FHS automatically adapts the span to the set
channel bandwidth.
The minimum settable channel bandwidth is 8.33 kHz with the R&S FSH3 models 1145.5850.03 and
1145.5850.13.
If you attempt to enter a smaller channel bandwidth, the R&S FSH will automatically set 8.33 kHz and
output the message "Limit exceeded".
With the R&S FSH3 model 1145.5850.23, the R&S FSH6 and the R&S FSH3-TV, the minimum channel
bandwidth is 833 Hz.