0006 00TM 1-6625-724-13&P0006 00-8the driver from the installed drivers under the Change Type option. For each printer type there are oftentwo drivers, a standard driver and one ending in “LF.” If you experience data overprinting on one line, usethe driver ending in “LF.” Conversely, if you experience data printing on every other line, select the driverwithout the “LF.”5. Setting Up PrinterThe AVA is designed to work with a wide variety of commercially available printers. Due to their low costand wide availability, it is recommended that a commercial grade printer be used for office environmentprinting. The AVA can be used with either a serial or parallel printer. The Centronix parallel interface issupported by the AVA.The CADU has been designed with an internal print spooler. Basically this means that as the PRINT keyis pressed while DPL is executing, the graphics image that appears on the screen is stored in RAM diskawaiting printing.If a printer is properly attached and configured, the image will be immediately printed. If no printer isattached, the print image is stored until a printer is attached. Up to 20 spooled screens can be storedwithout printing. If more than twenty displays are spooled, the first display spooled will be discarded tomake room for the next.6. Setting Up Printer Switch SettingsThe printer must be set up to operate with the AVA. There are basically three areas of setup:(a) Printer configuration switch setup (this is done on the printer)(b) CADU printer type setup(c) CADU printer port selection (serial or parallel)Since there are a wide variety of acceptable printers, only a few printer specific switch settings will begiven in this manual. The typical printer must be set up as follows: Hardware Interface: ...................Serial (RS-232) or Parallel Port Parity: ........................................NoneStop Bits.....................................1Data Bits:....................................8Baud Rate: .................................9600Data Protocol: ...........................ON/XOFF Disabled RDY/BSY Enabled (DTR hardware handshake)Handshake: ................................Carrier Detect (CD) DisabledClear To Send (CTS) DisabledData Set Ready (DSR) Disabled Paper Length: ............................11"Emulation: .................................Choose from list on CADULF Definition: ..............................CR without LFCR with LFCharacter Set:............................USA Character SetThe AVA supports several compatible printers that associate a line feed with a carriage return. If thisis the case with your printer, choose the printer type with _LF when in the DPL MANAGER Menusection, otherwise choose a printer type without _LF.7. Configuring the CADU for Printer TypeAfter the switches have been set on the printer, the CADU must be configured for that particular printer.To select the AVA printer, or any other printer type, go into the DPL MANAGER section and select theSetup operation. Another screen will appear from which the printer operation should be selected.8. Testing SetupA majority of the time, the printer manuals do not accurately depict the switch locations and properpositions. A few simple checks can be made to test the printer configuration. If the setup is not working,review the printer switch settings and make corrections as necessary.Establish if any communication can be made between the CADU and the printer. The followingprocedures will test areas like data bits, parity and baud rate:
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