R&S FSH
Measuring the Carrier-to-Noise Ratio
1145.5973.12 4.55
E-14
Press the REF MEASURE softkey.
Using the rotary knob or the cursor keys, select the
desired entry and confirm your choice with the
ENTER key or the F4 softkey.
Using the numeric keypad, enter the channel or
frequency of the desired reference channel.
Terminate your entry with the appropriate unit key or
the ENTER key.
The R&S FSH displays the frequency spectrum of the
reference channel as symmetrical to the channel
center.
You can alternatively also enter the channel center frequency of the reference channel by pressing the
FREQ function key.
Setting the reference channel bandwidth
The reference channel bandwidth is entered with the CHANNEL BW softkey. Make the entry after the
reference measurement has been activated. To indicate this, the REF MEASURE softkey is highlighted
in green.
Note: If the noise channel measurement has been activated, the NOISE MEASURE softkey is
highlighted in green.
•
If DIGITAL Tx is set, the R&S FSH measures the power in accordance with the selected channel
bandwidth. Measurement is performed selectively, i.e. any existing adjacent channels do not affect
the measurement.
•
If the 8VSB/ATSC pilot frequency is entered, the R&S FSH calculates the channel center frequency
as a function of the 8VSB/ATSC symbol rate.
Channel center frequency = 8VSB/ATSC pilot fre symbol rate / 4,
where the frequency of the 8VSB/ATSC symbol rate is 10.762238 MHz.
•
If ANALOG TV is set, the R&S FSH measures the peak power of the vision power in the reference
channel.
•
If the vision carrier frequency is entered, the R&S FSH calculates the channel center frequency as a
function of the channel bandwidth.
Channel center frequency = vision carrier frequency – 1.25 MHz + reference channel bandwidth / 2
•
If CW Tx is set, the R&S FSH measures the peak power within the channel bandwidth.
•
The R&S FSH indicates the channel limits by means of two blue vertical display lines.
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Tel:0755-83589391
Fax:0755-83539691
Website: www.Sengt.com
