User Manual

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
280User Manual 1178.3370.02 ─ 03
C/N .............................................................................................................................280
C/N0 ...........................................................................................................................280
Channel Bandwidth ....................................................................................................280
Adjust Settings ........................................................................................................... 280
C/N
Switches the measurement of the carrier/noise ratio on or off. If no marker is active,
marker 1 is activated.
The measurement is performed on the trace that marker 1 is assigned to. To shift
marker 1 and measure another trace, use the "Marker To Trace" softkey in the
"Marker" menu (see " Assigning the Marker to a Trace " on page 427).
Remote command:
CALCulate<n>:MARKer<m>:FUNCtion:POWer:SELect on page 540
CALCulate<n>:MARKer<m>:FUNCtion:POWer<sb>:RESult? on page 538
CALCulate<n>:MARKer<m>:FUNCtion:POWer[:STATe] on page 540
C/N0
Switches the measurement of the carrier/noise ratio with reference to a 1 Hz bandwidth
on or off. If no marker is active, marker 1 is activated.
The measurement is performed on the trace that marker 1 is assigned to. To shift
marker 1 and measure another trace, use the "Marker To Trace" softkey in the
"Marker" menu (see " Assigning the Marker to a Trace " on page 427).
Remote command:
CALCulate<n>:MARKer<m>:FUNCtion:POWer:SELect on page 540
CALCulate<n>:MARKer<m>:FUNCtion:POWer<sb>:RESult? on page 538
CALCulate<n>:MARKer<m>:FUNCtion:POWer[:STATe] on page 540
Channel Bandwidth
Defines the channel bandwidth.
The default setting is 14 kHz.
Remote command:
[SENSe:]POWer:ACHannel:BANDwidth[:CHANnel<ch>] on page 545
Adjust Settings
Enables the RMS detector and adjusts the span to the selected channel bandwidth
according to:
"4 x channel bandwidth + measurement margin"
The adjustment is performed once; if necessary, the setting can be changed later on.
Remote command:
[SENSe:]POWer:ACHannel:PRESet on page 541
7.2.4.4 How to Determine the Carrier-to-Noise Ratio
The following step-by-step instructions demonstrate how to determine the carrier-to-
noise ratio.
Measurements and Results