http://cfa.aquila.infn.it/wiki.eg-climet.org/index.php5?title=D1:_Losses_in_Tx_chain&feed=atom&action=historyD1: Losses in Tx chain - Revision history2024-03-28T19:30:40ZRevision history for this page on the wikiMediaWiki 1.19.2http://cfa.aquila.infn.it/wiki.eg-climet.org/index.php5?title=D1:_Losses_in_Tx_chain&diff=95&oldid=prevAdminchia: Created page with "== Purpose == This procedure allows to determine losses in the transmit chain at low power. It helps to identify eventually broken components in the transmit chain (e.g. circ..."2013-11-21T23:59:18Z<p>Created page with "== Purpose == This procedure allows to determine losses in the transmit chain at low power. It helps to identify eventually broken components in the transmit chain (e.g. circ..."</p>
<p><b>New page</b></p><div>== Purpose ==<br />
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This procedure allows to determine losses in the transmit chain at low power. It helps to identify eventually broken components in the transmit chain (e.g. circulator, antenna switch, cables).<br />
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== Remarks ==<br />
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This procedure tests all the elements along the signal path: cables inside the outdoor cabinet, circulator, VSWR coupler, antenna switch and finally the antenna cable. An alternative to this method would be to measure the S21 parameter using an S-parameter analyzer set at the radar frequency.<br />
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== Material ==<br />
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* Spectrum analyser<br />
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== Procedure ==<br />
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# Stop acquisition<br />
# Disconnect the RF signal cable from the input of the amplifier ([[Media:PictureAmpInputDegreane.png]]) and connect it to the input of the spectrum analyser<br />
# Configure a one-measurement (vertical beam) wind cycle on PCA (pulse width = 2500 ns)<br />
# Start acquisition<br />
# Measure the peak power with the spectrum analyser (settings: center frequency = 1290 MHz, video bandwidth = 2 MHz)<br />
# Connect the RF signal cable to the circulator input ([[Media:PictureAmpInputDegreane.png]])<br />
# Disconnect the cable from the divider of the vertical antenna and connect it to the spectrum analyser<br />
# Measure the peak power<br />
# Repeat step 3 and 8 for each antenna<br />
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Go to [[Maintenance Procedures]]; Go to [[RWP Maintenance in CWINDE]];</div>Adminchia