Rohde & Schwarz 1094.0006.50, Operating Manual

Page: 101 / 374

CTS55 Module Test
1094.0006.55 7.11 E-5
7.5.4 The Sensitive Power Measurement
In order to produce the accurate low level measurement, the SPM Calibration has been introduced. The
Sensitive Power Measurement feature is activated automatically when the input signal level is lower
than –10 dBm. When the measurement is active the SPM sign is displayed at the top of the menu
screen. The low level power can be measured down to approximately –45 dBm. When the signal will
become higher than –5 dBm the CTS will change back to the normal mode.
Sensitive Power Measurement is running SPM Calibration started
In order to calibrate SPM, the 0 dBm signal has to be supplied to the CTS Input and the Calibrate SPM
button shall be pressed.
SPM Calibration is running
While SPM Calibration procedure is running the “Calibration is Running “ message is displayed.
SPM Calibration OK