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Tune – up Instructions

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WERA4-Tune-up-Instruction-200919

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Tune – up Instructions

Version 1.0 September 2020

HELZEL Messtechnik GmbH

Carl-Benz-Strasse 9

24568 Kaltenkirchen, Germany

www.helzel.com

e-mail: wera@helzel.com

Tel.: +49 (0) 4191 - 95 20 – 0

Fax: + 49 (0) 4191 - 95 20 – 40

Summary of content (4 pages)

PAGE 1
Tune – up Instructions Tune – up Instructions Version 1.0 September 2020 HELZEL Messtechnik GmbH Carl-Benz-Strasse 9 24568 Kaltenkirchen, Germany www.helzel.com e-mail: wera@helzel.com Tel.
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Tune – up Instructions 1. Calculate the maximum permitted output power of the power amplifier The radiated HF power must be kept below the defined maximum radiation power for Ocean Radar of 50 W ERIP (47 dBm). Please note that the WERA power amplifier is capable to provide up to 49 dBm to compensate for cable losses for cases with the Tx antenna system installed in a distance of several 100 Meters.
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Tune – up Instructions Please ensure that the Tx antennas are tuned correctly and all cables are connected. It is strongly recommended to start the tune-up procedure with lowest output power. The output power can be adjusted manually or via remote access. The remote access is the preferred option. It accessible via the “Remote Control” program, the window below (Fig. 2) will show up and gives the user access to the settings and displays the measured values.
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Tune – up Instructions As a first step the output power need to be adjusted to a minimum, that means the PA gain should be set to 20 dB. Click on “Submit” and “save + close” to active the setting and return to the initial window (fig. 2). - Now run a short calibration measurement (80 Hz frequency offset). - Click on “check system now” to get the power amplifier output power reading. - Check the results using “Plott_WERA_Cal_lsq” according to the description of chapter 11.