R&S FSV3000 Series - Carrier-To-Noise Measurements; About the Measurement

Measurements and Results
R&S
®
FSVA3000/ R&S
®
FSV3000
195User Manual 1178.8520.02 ─ 01
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LTE\UL\LTE_UL_15MHZ.XML
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LTE\UL\LTE_UL_20MHZ.XML
WLAN
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WLAN\802_11ac\802_11ac_20MHZ.XML
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WLAN\802_11ac\802_11ac_40MHZ.XML
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WLAN\802_11ac\802_11ac_80MHZ.XML
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WLAN\802_11ac\802_11ac_160MHZ.XML
To load a stored measurement configuration, in the "General Settings" tab of the
"ACLR Setup" dialog box, select the "Manage User Standards" button to display the
"Manage" dialog box. Select the user standard file, then "Load" .
The stored settings are automatically set on the R&S FSV/A and the measurement is
restarted with the new parameters.
For details, see Chapter 7.3.6.4, "How to Manage User-Defined Configurations",
on page 185.
7.4 Carrier-to-Noise Measurements
Measures the carrier-to-noise ratio. C/No measurements normalize the ratio to a 1 Hz
bandwidth.
● About the Measurement........................................................................................195
● Carrier-to-Noise Results........................................................................................196
● Carrier-to-Noise Configuration.............................................................................. 197
● How to Determine the Carrier-to-Noise Ratio....................................................... 198
7.4.1 About the Measurement
The largest signal in the frequency span is the carrier. It is searched when the C/N or
C/N
0
function is activated and is marked using a fixed reference marker ( "FXD" ).
To determine the noise power, a channel with a defined bandwidth at the defined cen-
ter frequency is analyzed. The power within this channel is integrated to obtain the
noise power level. (If the carrier is within this channel, an extra step is required to
determine the correct noise power level, see below.)
The noise power of the channel is subtracted from the maximum carrier signal level,
and in the case of a C/N
0
measurement, it is referred to a 1 Hz bandwidth.
For this measurement, the RMS detector is activated.
The carrier-to-noise measurements are only available in the frequency domain (span
>0).
Carrier-to-Noise Measurements