User Manual DDS200 Digital Demodulation System 070-9952-00
User Manual DDS200 Digital Demodulation System 070-9952-00
User Manual DDS200 Digital Demodulation System 070-9952-00
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Appendix F: Remote Control via RS-232-C InterfaceInterface FunctionsThe interface is controlled by means of several control characters from the ASCIIcode range 0 to 20 hex. These control characters are transmitted via the interface(see Table F–2).Table F–2: Control characters of RS-232 InterfaceDesignation Control character FunctionREMC_char 12 hexRemote/local switchoverThis character enables switchover between themodes LOCAL and REMOTE.ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁLOKC_char ÁÁÁÁÁÁ 0C hex ÁÁÁÁÁÁÁÁÁÁÁÁÁÁLocal Lockout SwitchoverThis character enables or disables switchover to theLOCAL state.ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁSRQ_char ÁÁÁÁÁÁ 02 hex ÁÁÁÁÁÁÁÁÁÁÁÁÁÁService Request (SRQ)This character is sent if bit 6 of the status byte isset.Should the character SRQ_char be received, it willbe ignored.ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁGET_char ÁÁÁÁÁÁ 07 hex ÁÁÁÁÁÁÁÁÁÁÁÁÁÁGroup Execute Trigger (GET)This character is not permitted within a data stringand will cause an error message.Outside a data string, ie after a terminator or afterDCL, GET_char will produceDEVICE TRIGGER.DEVICE TRIGGER is not supported.ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁDCL_charÁÁÁÁÁÁ 03 hex Device Clear ÁÁÁÁÁÁÁÁÁÁÁÁÁÁ(DCL)ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁUpon reception of this character, processing of thecommands just received isstopped and the command processing software isset to a defined status.This character does not change the device setup.ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁXON_char ÁÁÁÁÁÁ 11 hex ÁÁÁÁÁÁÁÁÁÁÁÁÁÁEnables character outputXOFF_char 13 hexThis character enables data transmission from the<strong>DDS2<strong>00</strong></strong>.Disables character outputThis character disables data transmission from the<strong>DDS2<strong>00</strong></strong>.ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁEND_char0Dhex, 0AhexTerminator ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁF–4 <strong>DDS2<strong>00</strong></strong> <strong>Digital</strong> <strong>Demodulation</strong> <strong>System</strong> <strong>User</strong> <strong>Manual</strong>
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