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Numeric Data - Agilent Technologies 66 A Series Operating Manual

Multiple output linear system dc power supply

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Command
Store present output state
Query preset status of output
Perform self test on GP-IB interface
Set bits in mask register
Query bits set in mask register
Program the voltage DAC in counts
Querys setting of voltage DAC in counts
Send data to calibrate the voltage circuits
Set output to high V calibration value
Set output to low V calibration value
Query inputs of analog multiplexer
Query measured value of an output
Calibrate the voltage readback circuitry
Set output to V readback high cal value
Set output to V readback low cal value
Set full scale voltage programming range
Query full scale voltage programming range
Set output voltage
Query setting of output voltage
Increase or decrease output voltage by value
Figure 5-2 shows the possible syntax forms for the device commands that are used to program the power supply. Syntax
forms for the calibration commands that are discussed in Appendix A are also included. The oblong shape at the left of the
syntax forms contains the command header which must be entered as shown in Tables 5-1 and 5-2. Commands are accepted
in either uppercase or lowercase letters (ASCII characters). Circles contain characters that must be entered exactly as
shown. Characters such as a space <SP> or a comma are used to separate elements in the command string. Characters such
as a line feed < LF > or a semicolon are used to terminate the command string. Rectangles contain parameters that follow
the command header lines and arrows indicate the correct paths through the syntax diagrams.

Numeric Data

The power supply will accept numeric data in implicit point, explicit point, or scientific notation. A general syntax diagram
for numeric data is included in Figure 5-2. Implicit point notation means that numbers do not contain a decimal point;
integers for example. Numbers written in explicit notation contain a decimal point, such as 12.35. In scientific notation, the
letter E stands for "10 raised to". For example, 1.2E3 is read as 1.2 times 10 raised to the 3rd power, which equals 1,200.
Plus and minus signs are considered numeric characters and are optional. If you program a number with an accuracy that is
greater than the resolution of the supply, the number will automatically be rounded to the nearest multiple of the power
supply's resolution. Table 5-1 gives the ranges for numeric data that is sent to the supply.
The power supply will also return numeric data (ASCII characters) to your computer. The format of the numbers returned
depends upon the type of data requested. Table 5-2 gives the format for data returned to the computer in response to any of
the queries that are listed.
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Table 5-1. Power Supply Commands (continued)
Header
STO
STS?
TEST?
UNMASK
UNMASK?
VDAC
VDAC?
VDATA
VHI
VLO
VMUX?
VOUT?
VRDAT
VRHI
VRLO
VRSET
VRSET?
VSET
VSET?
VSTEP
Output
Data Range
Channel
(Fig. 5-2)
0-10
1, 2, 3, 4
.
1, 2, 3, 4
0-255
1, 2, 3, 4
1, 2, 3, 4
See Service Manual
1, 2, 3, 4
1, 2, 3, 4
See Table 5-4
1, 2, 3, 4
See Table 5-4
1, 2, 3, 4
See Table 5-4 V
1, 2, 3, 4
1-18
1, 2, 3, 4
See Table 5-4
1, 2, 3, 4
See Table 5-4
1 2, 3, 4
See Table 5-4
1, 2, 3, 4
See Table 5-4
1, 2, 3, 4
See Table 5-4
1, 2, 3, 4
See Table 5-4
1, 2, 3, 4
See Table 5-4
1, 2, 3, 4
See Table 5-4
1, 2, 3, 4
See Table 5-4
Remote Operation 67
Syntax
C2
Q2
C1
C4
Q2
C4
Q2
C5
C3
C3
C4
Q2
C5
C3
C3
C4
Q2
Q2
Q2
C4

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