Agilent Technologies 4294A, Programming Manual

Page: 55 / 518

Chapter 4 55
Preparing For Accurate Measurement
Adapter Setting
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Lines 210 to 310 These lines measure phase data, open data, short data and load data by
using the subprogram FNAdap_setup. If an error is detected after any
measurement, the program is terminated.
Lines 330 to 350 These lines calculate setup data and store them in non-volatile
memory.
Lines 360 to 380 These lines indicate the message of completion and terminate the
program.
The following describes FNAdap_setup, a data measurement subprogram for calculating
setup data, which is shown in lines 420 to 800.
Line 450 This line clears the status byte register.
Lines 460 to 470 These lines prompt for the connection of the standard for measurement
specified by Standard$ and wait for you to press the y key and the
return key.
Lines 490 to 500 These lines set the branch target for an SRQ interrupt to make the SRQ
interrupt effective.
Lines 510 to 600 These lines send the commands to execute the measurement specified
by Standard$.
Line 620 This line waits for measurement to finish.
Lines 640 to 740 These lines check whether an error has occurred during measurement.
If no error occurred, then these lines indicate the message of
measurement completion and return a 0 as the return value from the
subprogram. If an error occurred, then these lines indicate an error
message, execute the command that suspends data measurement, and
return -1 as the return value from the subprogram.
Lines 760 to 780 These lines are steps for any key other than the y key pressed in
response to line 470. These lines execute the command that suspends
data measurement and then return -1 as the return value from the
subprogram.
Example 4-1 Data measurement for adapter setting
10 DIM Adapter$[9],Buff$[9]
20 INTEGER Scode,Result
30 CLEAR SCREEN
40 IF SYSTEM$("SYSTEM ID")="HP4294A" THEN
50 ASSIGN @Hp4294a TO 800
60 Scode=8
70 ELSE
80 ASSIGN @Hp4294a TO 717
90 Scode=7
100 END IF
110 Adapter$="APC7"
120 !
130 OUTPUT @Hp4294a;"PRES"
140 OUTPUT @Hp4294a;"*OPC?"
150 ENTER @Hp4294a;Buff$
160 OUTPUT @Hp4294a;"E4TP "&Adapter$
170 !
180 OUTPUT @Hp4294a;"ESNB 256"
190 OUTPUT @Hp4294a;"*SRE 4"