Hardkeys R&S NRP
1144.1400.12 4.4 E-2
Zero A | B – ( )
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Starts zeroing in channel A.
Zero A | B
Zero C | D
Zero C | D
Zeroing for channels B, C and D.
Remote Control
CALibration[1..4]:ZERO:AUTO[?] ONCE
Zeroing failure If the power measured during zeroing is too large, the R&S NRP re-
ports an error. The most common cause of this error is that the user
started zeroing without turning off the test signal beforehand. Other-
wise the sensor probably has a hardware defect.
Fig. 4-4 Zeroing error message
Test Measurement
The R&S NRP-Z power sensors are absolutely calibrated; a calibration measurement after switching on
the instrument is not necessary and also not planned. The sensors should be recalibrated in regular
intervals; for details on this, please refer to the data sheet. However, overload, other damage or ex-
treme operating conditions may cause the measurement uncertainty to exceed the specified values.
The option R&S NRP-B1 (sensor check source) makes it possible to check the reliability of the sensor
by performing a test measurement. In the case of sensors with a lead-in attenuator (pad) – R&S NRP-
Z22, R&S NRP-Z23 and R&S NRP-Z24 – the test measurement can be made with or without an at-
tenuator.
Hardkey
(ZERO/CAL)
ä
Fig. 4-5 Zero/Cal dialog box
Test at Power Ref – ( )
Sensor only ä
Starts a test measurement for a sensor without a lead-in attenuator.
The sensor must be connected to the sensor check source. If an at-
tenuator is present, it must first be removed.
Test at Power Ref – ( )
…with Pad ä
Starts a test measurement for a sensor with a lead-in attenuator. The
sensor with attenuator must be connected to the sensor check source.
Report… – ( )
Opens the dialog box displaying the results of the test measurement.
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