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3-79
Bipolar Mode
ming step. Calibration procedures for operating in the
bipolar mode are provided in paragraph 5-30.
3-80
Calibration. The ZERO ADJUST allows the nega¬
tive limit to be set to-10V when the 59501B is program-
3-81
Sample Program. A sample program for control-
med to zero (2000). The D/A FULL SCALE ADJUST
ling the bipolar output of the 59501B is given in example
allows the positive limit to be set to +9.98V when the
7. This program is similar to the unipolar mode program
59501B
is programmed to maximum (2999). This range
given in example 8 except that it allows keyboard input
results in a resolution of 19.98V/999 or 20mV per program-
of bipolar voltage from -10V to +9.98V.
Example 7, 9825A Sample Program, 59501B Bipolar Output
e:
-....
Out put j 59501
Ii
"
2
1=
dsp
"Set
5950IB
to BIPOLAR"istp
3 ;i
c.'!vid P i1
" 3 y 9 ::l "
4 i i dsp "Set" D/fi FS
•or
ty „ yyw" ? st.P
5
»
end
r1' ; > "
VU'i:"
!•
"dUU
3
"
i\
fY ^
'
- ^ !-:i r"'9
■ '''?
'■
~! "
,
9 8 ii d 7
p "
'' V
0
11 a 7 e ^ 7
0 0
^
h 7 7 h" ii 7 a i t
^ 3
8 8 8 ii 77
0
11
1 4:
?
id
fHTf
i nt
< (
V +
10 > ■■■
0 2
+
5
) •+
N
I/'1111
j"
/
0 f,
„
j.
]i H ?
0
1,
0
1 , ! .
Explanation;
1;
Sets fixed point format with three digits to the right of the decimal. This allows for better accuracy when
performing the adjustment specified in line 8.
2:
Setup instruction.
3-10:
Calibration routine using ZERO ADJUST and D/A FULL SCALE ADJUST controls on the 59501B.. Note
that in line 7, an average value is calculated so that the adjustment can be completed in the minimum number
of steps.
11:
User inputs desired output voltage (-10 to +9.98) on keyboard.
12:
If the voltage requested is too high, "Voltage too high" appears on the display for three seconds, and then
the program returns to line 11.
13-14:
Proper range is selected and correct data word value (N) is calculated.
15:
Data word (N) representing the desired positive or negative output voltage is sent to the 59501B . Format
f4.0 deletes leading spaces and z suppresses carriage return/line feed characters. If leading spaces are not
deleted and CR/LF characters are not suppressed, the output will go to an undesired value (see paragraph 3-34).
3-19
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