HP 8530A, Руководство по эксплуатации и программированию, Страница: 351 / 439

Programming Examples
Load the receiver memory from the disc as follows:
OUTPUT Rec;"HOLD;"
OUTPUT Rec;"CHAN1; LOAD; DATAFORM; 2,9 DISF ""CHAN1"";"
OUTPUT Rec;"CHAN2; LOAD; DATAFORM; 3,10 DISF ""CHAN2"";"
The example above loads the F ormatted Data les \FD CHAN1" and \FD CHAN2".
If HOLD is not programmed, the formatted data traces are overwritten by new data during the
next sweep .
Note that in order to use DATAFORM , DATARAW , or DATADATA , the channel to which the data
applies must be selected. When loaded, the trace is automatically updated. DATARAW stores
information from the Raw data array for the A ctive P arameter on the A ctive Channel.
However , there is an exception to this rule: If four parameter display is turned on, DATARAW
stores all four raw data arrays for the selected channel.
T o load a memory trace , the memory display must be o (DISPDATA; ). Correction must be o
(CORROFF; ) before cal sets can be loaded into receiver memory from disc .
Note that the DISF command is used for all disc operations (store , load, replace , delete). The
le name must be enclosed in quotation marks , and B ASIC usually requires that in order to
send the quote symbol that it be doubled.
File Name Prexes
If you examine the directory following this operation, notice that the le name is given as
FD FILE1. The three character lename prex is automatically included in the directory
listing: it is the way in which the receiver operating system keeps track of the data type .
This lename prex is never used in the lename you select for store , load, or delete disc le
operations . However , if the disc is to be read by the external computer directly , the prex is
considered part of the lename and must be used. T able 15-3 shows all le name prexes used
by the receiver .
Printing Y our Own Messages on the Receiver Display
Messages of up to 50 characters are displayed using
"TITL" "GOOD MORNING" ";"
This causes the message GOOD MORNING to appear in the Title area of the receiver display . (The
quotation marks are required and B ASIC usually requires that in order to send quotation marks ,
double marks must be used.)
T ext and graphics information can be written to the display using a special area of receiver
memory , using an internal HP-GL subset or the standard plotting language implemented by the
computer .
Example 10: Plots Using Copy
This example requires an XY plotter be connected to the receiver (System Bus or RS-232 port)
and be properly addressed. Refer to Chapter 16 for instructions . The program measures a
single sweep with autoscaling, then plots each parameter .
Measurement results are output to a plotter connected to the receiver System Bus using a
sequence of commands to specify the quadrant on the paper , the pen number , and the data to
be plotted. The following sequence plots the four parameters .
INPUT "Load Paper, then CONTINUE"
OUTPUT Rec;"PARA1; SING; LEFU; PLOTALL"
OUTPUT Rec;"PARA2; SING; LEFL; PLOTALL"
18-22 HP-IB Programming