Scanning Voltmeter; Digital Bus And Triggering - HP E1351A User Manual

Scanning Voltmeter

Digital Bus and Triggering

Chapter 1
120 TRIGGER 70903
130 NEXT I
140 END
When the multiplexer(s) is combined with a multimeter to form a single
instrument, they become a virtual instrument, a scanning voltmeter. The
multiplexer(s) and the multimeter have the same secondary address. The
multimeter automatically configures the multiplexer, so the
and
SCAN:PORT TRIG:SOUR
advance is from the digital bus handshake lines, so the count loop is not
required. The ARM:COUN
lists, so you cannot specify the number of cycles through the scan list. You
can, however, specify
INIT:CONT ON
scan list.
10 DIM Rdgs(1:16)
20 OUTPUT 70903;"*RST"
30 OUTPUT 70903;"MEAS:VOLT:DC? (@100:115)"
40 ENTER 70903;Rdgs(*)
50 PRINT Rdgs(*)
60 END
The HP E1351A/E1353A can be triggered for channel advance from the
VXIbus backplane or through the digital bus handshake cable on the front
of the component assembly. Backplane triggering can come from HP-IB
computer commands over the HP-IB Bus or from the HP E1300/1301
Mainframe "Event In" port. Digital bus triggering uses two handshake
lines; channel advance and channel closed. Channel advance (input to
multiplexer) triggers an advance, and channel closed (output from
multiplexer) signifies advance completed.
The HP E1326B Multimeter has a digital bus port on the face plate, and
connects to the multiplexer with the digital bus cable (see Figures 2-10 and
2-11). To connect other multimeters for digital bus triggering, you must
prepare a custom cable. Use a connector like the one on the digital bus
cable (HP part number E1300-61611). Connect the measurement complete
port from the multimeter to the channel advance pin, and the external trigger
to the channel closed pin. Connect the grounds for both signals to the
digital bus ground (second pin from right). You can use this cable to
connect an external multimeter to a switchbox, and then use
(digital bus triggering). You can also order a custom cable with
DBUS
BNC to digital bus connectors, HP part number E1411-80001. See Figure
2-11 for more information on multiplexer-to-multiplexer and
multiplexer-to-multimeter connections.
Getting Started with the HP E1351A/53A
!Trigger the switchbox to advance
the channel list
!Increment count
commands are not required. Channel
command does not apply to downloaded scan
for continuous scanning through the
!Dimension an array for 16
readings
!Reset instrument
!Configure instrument
!Enter readings into array
!Print results
SCAN:MODE ,
TRlG:SOUR
15