Equipment information

Rohde & Schwarz NRV-Z51 0857.9004.02 Level Meter
Rohde & Schwarz
Model NRV-Z51 0857.9004.02
Date 1999
Category Measurement instruments
Group Level Meter
Description Thermal Power Sensor 0 -18GHz
                                    Power sensors NRV-Z51, NRV-Z52 and NRV-Z55 are thermal power
sensors for basic instruments NRVS, NRVD, URV35 and URV55.
They permit power measurement from 1 pW to 100 mW within the
frequency ranges DC ... 18 GHz (NRV-Z51), DC ... 26.5 GHz
(NRV-Z52) or DC ... 40 GHz (NRV-Z55) in systems having a
characteristic impedance of 50

The thermal conversion principle always permits measurements
of the RMS value independently of the waveform and
modulation of the test signal. Depending on whether the
measured value is output as a power and/or a power level or
as a voltage, the average power (and/or the equivalent power
level) or the RMS value of the voltage is displayed.

All measuring heads are d.c. coupled so that even power in
the audio-frequency range can be measured.
1.2	Design and Functioning

The power Sensor contains a thermo-electric transducer made
of silicon by means of semiconductor technology. Due to the
power supplied, the 50-Q termination situated on it heats
up. immediately next to this resistor there is a
thermoelement generating a direct voltage proportional to
the heating. As termination and thermoelement are
dc-decoupled, the power sensors do not contain, coupling
capacitors. This means that even d.c. powers can be
measured, and there is no lower cut-off frequency below
which matching and frequency response deteriorate again.

The direct voltage generated by the thermoelement is
amplified by a low-noise Amplifier of high sensitivity
within the Sensor and supplied to the basic unit for further

All power sensors contain a data storage in which the
parameters obtained during calibration in ---prad u<Sion-a
re^tored-in a-narv-vola-tiie-memoryr^The-ba si
e-i-ns-trument-reads-out-these~data-arid ta kes account of
them when indicating the power measured.

Linearity correction of the measured values is effected
automatically with the aid of the correction coefficients
stored. For temperature correction, the temperature of the
measuring head is evaluated additionally via a temperature
sensor. For measurements with frequency response correction,
the measuring frequency must be entered via keyboard, remote
control Interface or an analog control input.

These manuals are available for the above equipment:

Manual Type User Manual RohdeUndSchwarz-8110-Manual-Page-1-Picture
Pages 18
Size 336.77 Kbytes (344848 Bytes)
Language english
Date 01 January 1999
Quality Scanned document, all readable.
Upload date
MD5 b6d572ae80c27e7fa264bd3869b20b55
Downloads 174 since 14 December 2016
1	Characteristics
 ... 5

1.1	Application
 ... 5

1.2	Design and Functioning
 ... 5

2	Preparation for Use
 ... 6

3	Operation  ...   ... 
 ... 7

3.1	Measuring by means of Power Sensors NRV-Z51, NRV-Z52,
NRV-Z55  ... 	7

3.1.1	Power and Voltage
Measurement ... 7

3.1.2	Power Measuring Ranges
 ... 7

3.1.3	Measurement Rate and Noise
 ... 8

3.1.4	Zeroing
 ... 8

3.1.5	Frequency Response Correction
 ... 9

3.1.6	Measurement of Modulated
Signals ... 9

3.2	Measuring Accuracy
 ... 11

3.2.1	Mismatch
 ... 11

3.2.2	Calibration Uncertainty
 ... 11

3.2.3	Linearity Error
 ... 12

3.2.4	Display Noise
 ... 12

3.2.5	Zero Error
 ... 12

3.2.6	Temperature
Effect ... 13

3.2.7	Errors of the Basic Unit
 ... 13

3.2.8	Maximum and RSS Error
 ... 13

3.2.9	Total Mismatch Uncertainty
 ... 14

4	Maintenance and Troubleshooting
 ... 15

4.1	Maintenance
 ... 15

4.2	Troubleshooting
 ... 15

4.2.1	Testing Sensor Sensitivity
 ...  15

4.2.2	Testing SWR
 ...  15

5	Checking Rated Specifications
 ...  16

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