Agilent Technologies E8462A, User Manual

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Agilent E8462A Scanning Voltmeter Application Examples 119 Chapter 4
.
The Scanning Voltmeter
The switchbox device driver discussed in Chapter 2 DOES NOT apply to the
E8462A multiplexer when part of a scanning voltmeter. The note on Page
117 prescribes the use of the Agilent E1326/E1411 5½-Digit Multimeter
device driver and command reference. The multimeter's Command Quick
Reference is provided at the end of this chapter for your scanning voltmeter
application reference. Use your Agilent E1326/E1411 5½-Digit Multimeter
User's Manual for detailed information about multimeter commands used
with the scanning voltmeter. The scanning voltmeter is easily configured to
perform voltage, 2-wire ohms, 4-wire ohms or a combination of 1-, 2-, 3- or
4-wire measurements over the module's internal analog bus. The E1326/
E1411 multimeter automatically controls the channels and tree relays when
you use the
MEASure or CONFigure commands. Tree relays are described
in Table 4-2.
Table 4-1.
Agilent E8462A Default Conditions for Power-on and Reset
Parameter
Default
Value
Description
ARM:COUNt 1 Number of scanning cycles is one.
TRIGger:SOURce IMM Advances through a scanning list
automatically.
INITiate:CONTinuous OFF Number of scanning cycles is set by
ARM:COUNt.
OUTPut[:STATe] OFF Trigger output from EXT, TTL, or ECL
sources is disabled.
[ROUTe:]SCAN:MODE NONE Channel list is set up for volts
measurement (the default mode).
[ROUTe:]SCAN:PORT NONE Analog bus connections are
disabled.
Channel state All 256 channels are open (channels 00 - 255)
Tree relay state All tree relays are open (channels 9000 - 9108)
Analog Bus relay state All analog bus relays are open
(channels 9200 - 9204)
Channel list from SCAN
command (after *RST)
Current channel list is invalidated following a
reset of the module with *RST command.