Product category:
Stand-Alone Instruments
News Release from: Willtek Communications | Subject: Griffin series
Edited by the Electronicstalk Editorial
Team on 04 November 2002
Fast sampling allows drive-by RF
characterisation
A new up-convertor option for the Willtek Communications Griffin series of RF receivers adds the frequency range from 300 to 500MHz and meets the needs of network operators and RF planners for new rad
A new up-convertor option for the Willtek Communications Griffin series of RF receivers adds the frequency range from 300 to 500MHz and meets the needs of network operators and RF planners for new radio systems now being widely installed such as Tetra, CDMA450 and GSM-R/analogue The new system is making it possible to take measurements during drive-by and through tests
This article was originally published on Electronicstalk on 21 Nov 2002 at 8.00am (UK)
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More than 25 downlink channels can be sampled at speeds up to 100km/h and still meeting the Lee-criteria (36 measurement on each frequency within 40 lambda) for valid local average power measurements of RF signals.
Characterising the RF signal behaviour is critical for all stages of networks.
Measurements at rollout allow the RF model to be calibrated for the real world environment that in turn identifies the optimum positioning of base stations to ensure coverage on all locations in the target area.
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During operation and on extensions, the network needs to be checked for no gaps in the coverage and to ensure compliance with any licence conditions.
Gunther Klenner, Product Marketing Manager at Willtek, explains: "The wide instantaneous dynamic range of the Griffin at 80dB and the accuracy of 1dB provides confidence in the RF channel measurements which leads to ensured coverage and higher quality of service for network users".
Klenner goes on to say: "The channel measurement speed of the Griffin is unmatched by any other equipment as we use special receiver technology, so coverage tests and verification on existing and new mobile radio networks can now be made much faster than before".
Used with the Willtek Hindsite software, the measurement data from the Griffin can be overlaid on topographical mapping details and compared with values from the RF model.
This correlation of actual field and predicted signal strengths for the radio coverage allows fine-tuning on a range of network topologies.
The new 300 to 500MHz up-convertor module is easily hooked up to the Willtek Griffin receiver with front panel connections providing a convenient lightweight package, making it ideal for efficient network coverage tests.
RF planners and engineering groups in network operators as well as infrastructure installation teams will welcome this addition as channel signal measurements will be faster.
Finance managers will welcome the potential to reduce investment costs as fewer base stations will be required to provide effective signal coverage and faster revenue generation as networks turn-on quicker.
The standard Willtek Griffin receiver provides fast measurements in the 800 to 1000MHz (cellular, GSM 900) and 1700 to 2000MHz (PCS, GSM 1800) frequency bands.
This rapid scan and sample rate of 1000 channels and 100,000 readings per second increases the efficiency of drive-by testing in the cellular bands.
The compact unit comes in a robust metal case weighing only 3.3kg and the battery power provides ten hours of run time.
This portability allows to do pedestrian coverage test in-door and out-door as well.
A separate module is available for the Willtek Griffin receiver for UMTS frequency bands.
The Griffin family now provides the industry with comprehensive coverage for all modern mobile radio networks.
The accuracy and dynamic range of the Griffin, ensure the highest standards of measurements are available to the industry.
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