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Understanding the HP E1351A/53A FET
Using This Chapter
Commands for Scanning Switchbox Channels
Using Scanning Trigger Sources
Scanning with
External
Instruments
Chapter 4
This chapter explains techniques to scan the channels of 16-Channel FET
and 16-Channel Thermocouple FET Multiplexer Modules. This chapter
contains the following sections:
•
Commands for Scanning Switchbox Channels . . . . . . . . . . . Page 45
•
Using Scanning Trigger Sources . . . . . . . . . . . . . . . . . . . . . . Page 45
•
Using the Scan Complete Bit. . . . . . . . . . . . . . . . . . . . . . . . . Page 52
Scanning multiplexer channels consists of closing a set of channels, one at a
time. The multiplexer has single, multiple, or continuous scanning modes.
See Figure 4-1 for the different commands used in scanning.
The
TRIGger:SOURce
channel list. Figure 4-2 shows the different trigger sources.
DBUS
uses the digital bus handshake lines. You can use the
command to immediately advance the channel list while in the
or
BUS
TRIG:SOUR HOLD
same as
.) To enable the HP E1300/E1301 Mainframe "Trig
TRIG[:IMM]
Out" port, use the
OUTP ON
source is reserved with the
"Event In" are mainframe resources, and can only be allocated to one
instrument at a time.
The examples in this chapter show different ways to scan channels of a
switchbox in an HP E1300/E1301 Mainframe. The operation is similar to
other HP VXIbus mainframes with HP command modules that have "Trig
Out" and "Event In" ports. The computer used in the examples is an HP
Series 200/300 used with HP BASIC as the program language. The
computer interfaces with the mainframe over HP-IB. Assumed is an:
•
HP-IB select code of 7
•
HP-IB primary address of 09 for the HP E1300/E1301 Mainframe
•
HP-IB primary address of 22 for the HP 3457A Multimeter
•
HP-IB secondary address of 14 for the multiplexer module
Understanding the HP E1351A/53A FET Multiplexer Modules
Multiplexer Modules
command specifies the source to advance the
mode. (Note that
TRIG:SOUR IMM
command. The "Event In" mainframe trigger
TRIG:SOUR EXT
command. "Trig Out" and
Chapter 4
TRIG:SOUR
TRIG[:IMM]
TRIG:SOUR
is not the
45
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