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Cableconnections:

Otherpinsarenotused.Cableiswiredstraightthrough,meaningnullmodemcableswill

notwork.Donotattempttoconnectthisunitusingnoncompatiblecablesoruntestedserial

ports.Whenusedwithacomputer,bewareofpossiblegroundloopscausedbytheserialport

connection.Makesureyoucanaccess(andmodifyifnecessary)theserialportsettingsonyour

controldevice/computer.Ifyouarenotfamiliarwithserialcontrol,askforassistancefroma

qualifiedengineer.

Pin2:TXdata:datatransmissionoutput

Pin3:RXdata:datareceptioninput

Pin5:GND:ground

!!!IMPORTANT!!!

Whenthecommand(SET,GET,INC,DEC)isinvalid,theunitwillsend:“ERROR:Unknown

Command!”Whenaninvalidattributeissent,theunitwillreply:“ERROR:UnknownAttribute!”

Whenyouattempttosendaninstructionwithavalueoutofrange,theunitwillreply:“ERROR:

ValueInvalid!”However,thisdoesnotapplytooutputlevelrelatedcommands.Inthesecases,

theunitwillsetthevaluetothevalueclosesttotheabsolutelimitvalue.Forexample,yousend

“SETMASTER-99”.Theunitwillnotreplywithanerrormessage,instead,thereplywilllook

likethis:“MASTEROFF”.ThelowestpossibleMasterlevelis-80,so-99meansthatthemaster

islowerthanthelowest(-80)value.Themasterwillbemuted.Whenacommandthatdoes

notrequirevaluefeedbackhasbeenexecuted,theunitwillreply:“InstructionExecuted!”,for

examplewhentheuserdefinabledisplaytextorfonttypehasbeenaltered.Whentheinstruction

isinvalid,thereplywillbe:“ERROR:InvalidInstruction!”

WhenthetextreturnedviaRS232isgarbledornocommunicationispossible,adjustyour

communicationsparameterstomatchthoseoftheunit.Alsomakesurethefrontpanel

operationisunlocked.Whenacommunicationerrorhasoccurredduetoinvalidcommunication

parametersorunknowncharacters,youwillneedtoflushtheRS232buffermanually:whenthe

unitreceives“<CR>”or“enter”,thebufferwillbeflushed.Alternatively,youmightconsider

cyclingthepower,justtobesure.Duringthepower-onprocedure,theunitwillidentifyitselfvia

atextdumpontheserialport.Whennotextisshownonyourserialcommunicationdevicewhile

theamplifierisperformingitspower-onselftests,yourcommunicationparametersorserialcable

arewrong,notconnectedorincompatible.

WesupposeyouarefamiliarwithRS232communication,serialcablesandRS232portsettings.

IncaseyoumightexperienceRS232communicationproblems,consultanexperiencedsystem

engineertogetyoustarted.