HP 8530A, Руководство по эксплуатации и программированию, Страница: 288 / 439

Printer Setup
High Speed Conguration
As mentioned above , you will need a special cartridge called the \Plotter in a Cartridge"
from P acic Data Products . This device programs the laser printer so it understands plotter
commands (HP-GL). The cartridge essentially turns the laser printer into a plotter . The \laser
plotter" accepts HP-GL commands and \draws" the picture in its own memory . The printer
then produces a page based on the \drawing" in its memory .
Why it is F aster?
In normal laser printer operation, the analyzer must send pixel data for the entire page - even
if the displayed measurement is very simple . A whole page of pixels at 300 DPI requires a little
over 1 megabyte of data. It takes a long time to transfer this much data over the serial bus .
With HP-GL emulation, printing is faster for two reasons: 1. There is far less data to transfer
since only HP-GL commands must be sent over the serial bus . 2. The laser printer must only
change memory locations that equate to black pixels . The majority of memory locations (those
that represent white pixels) do not need to be accessed. This saves even more time .
My printer has Built-In HP-GL, Do I still Need the Cartridge?
Y es . T o use the built-in HP-GL emulation mode , laser printers usually require the computer or
instrument to send a special \escape sequence" code . The code turns HP-GL mode ON. Such
printers usually do not allow you to turn HP-GL mode ON from the front panel. At this time ,
the HP 8530A cannot send this special code , so you must use a special cartridge to use HP-GL
mode .
Ordering the Cartridge
There are two versions of Plotter in a Cartridge:
Standard F or use with the HP LaserJet Series II.
\P ersonal Edition" (P .E.) F or use with the HP LaserJet IIP , IID , III, and IIID .
Y ou can order either of these cartridges from many computer suppliers . W e found them for
about half suggested retail price at:
DH Systems: 1940 Cotner A ve ,
Los Angeles , CA 90025
(800)-747-4755
Attention: Sales Department
The part number to order from DH Systems is:
Standard DH 701-PCRT
P ersonal Edition DH 702-PCRT-P
If you want to contact the manufacturer of the cartridge , call or write:
P acic Data Products
9125 Rehco Road, San Diego , CA. 92121
Phone: (619) 552-0880
F ax: (619) 552-0889
Copy (Printing and Plotting) 16-7