R&S, Directional Power Sensor

NRT-Z44

P.O.A

* Ex GST. Check with us for the latest pricing

- For mobile use, service, development, production and quality management
- Up to three (four) measurement channels
- Digital sensor interface
- Sensor operation directly on PC
- Sensors of the predecessor model NAP connectible
- Frequency range: 200 MHz to 4 GHz

These power sensors can be used as self-contained measuring instruments with digital interface even without the base unit. In addition to a directional coupler and analog section, they comprise a processor kernel for control of the hardware and remote interface and for processing the measured data (temperature compensation, linearization, zeroing and frequency-response correction). This compact concept provides a wealth of measurement functions without the restrictions of conventional analog solutions.

Average power (rms value)
This measurement function returns for any type of test signal - whether modulated, unmodulated or several carriers - the average value of the power, i.e. a result as provided by a thermal power meter. It features a measurement range of 35 dB to 40 dB as well as high measurement accuracy.

Peak envelope power (PEP) and crest factor
These two parameters provide information on the peak power of a modulated envelope and thus describe the overdrive characteristics of transmitter output stages. The result of the crest factor measurement is referenced to the average power and read out in dB. The measurements are carried out with a video bandwidth adjustable in several steps and allow determination even of shorttime, high-power peaks generated, for example, by CDMA base stations.

Average burst power
This function can be used for measuring modulated and unmodulated bursts. The measurement is based on the average power and the duty cycle, which may be defined by the user or determined automatically by the power sensor.

Complementary cumulative distribution function (CCDF)
This function measures the probability of the peak envelope power exceeding a preset threshold so that the amplitude distribution of transmitted signals with non-determined envelope can be determined.

Matching
The power sensor calculates the matching of the load from the average values of forward and reverse power. This parameter can be output in all common representations - as return loss, SWR, reflection coefficient or power ratio in %. Since the reverse power measurement channel is more sensitive than the forward channel, matching measurements can already be made at very low powers.

Excellent shielding
The power sensors feature excellent shielding so that emissions from the microprocessor or from the digital data stream on the connecting cable are completely blocked out. Any radiated emissions at the RF connectors are below the limit of detection. The excellent intermodulation characteristics keep unwanted frequency components resulting from the insertion of the power sensor to a minimum. These are all good reasons to use these power sensors not only for testing but also in fixed installations.

Direct power monitoring on PC.
This is the most economical way of performing high-precision power and reflection measurements with the Power Sensor. Via the Interface Converters they can be operated on the serial RS-232 or PC Card interface of any PC. In addition to purely remote-controlled applications, e.g. power monitoring in transmitter stations and EMC test systems, this solution is ideal where the data is to be collected by a computer. This may be in the development laboratory as well as in the maintenance of base stations, where in addition to power and reflection other parameters have to be measured and recorded. A Windows user interface (V-NRT, supplied with the sensors) is available for all these applications. This program allows setting of all the available measurement functions as well as display and storage both of individual results and of whole measurement series.

Datasheet

Contact

Australia: sales@avw.com.au
Syd: 02 8213 0200  Mel: 03 8691 5210 Qld: 07 3607 3785 WA/SA/NT: 08 8120 3203

New Zealand: sales@avw.co.nz
Akl: 09 271 4000 Wel:  04 499 3888

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