OMB EM 1000 HE DIG PLUS COMPACT - Driver Module

FMTRANSMITTER
TREM1000HEDIGPLUSCOMPACT
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TechnicalManual1v2November2019  72
3.810WDRIVERBOARD
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Figure:10Wdriverboard
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ThisamplifierboardreceivesthesignalfromtheFMSYNTHETIZERmodule.TheRFsignalthat
comes from this module is filtered and amplified by a MOSFET Q1 MRF6V2010NBR5. The
amplifier circuit has a variable power supply that ranges between 30Vdc and 50Vdc, after
passingthroughtheLM317regulator,30Vddsareobtained.
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The output power of this DRIVER is variable, so the output power depends on the Byas
voltagethatisappliedtothetransistor.ThisvoltageofByascomesfromthetensionofthe
ALCloop.ThisvoltageisgeneratedbytheCONTROLCARDbymeansofaPWMsignalthatwill
bedeterminedbytheoperatinglogicandoperatingstatusoftheequipment.
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Thisboardalsoworksasaninterfaceforthesignalsthataregeneratedinthefinalstageand
output filter, reaching the FWD, REF and temperature signals, which are sent to the MAIN
BOARDwheretheyareprocessedandsenttotheCONTROLBOARD.
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