User`s manual

Scanning Switchbox Channels (E1411B/E1460A)
In this example, the stand-alone multimeter (HP E1411B) scans 64 channels
on an HP E1460A relay multiplexer switchbox. The scanning sequence is
controlled with the VXIbus TTLTrg trigger lines.
10 !Dimension a computer array to store the readings.
20 DIM Rdgs(1:64)
30 !
Reset the E1411B multimeter and the E1460 switchbox. Wait for the
40 !resets to complete before continuing.
50 OUTPUT 70903;"*RST"
60 OUTPUT 70903;"*OPC?"
70 ENTER 70903;Rst_done
80 OUTPUT 70914;"*RST"
90 OUTPUT 70914;"*OPC?"
100 ENTER 70914;Rst_done
110 !
Configure the multimeter for DC voltage measurements. Set its trigger
120 !source to TTL trigger line 0, set it to receive 64 triggers (one to measure
130 !each channel). Set the multimeter to output its channel closed pulse on
140 !TTL trigger line 1. Wait for the configuration to complete. Place the
150 !multimeter in the wait-for-trigger state.
160 OUTPUT 70903;"CONF:VOLT:DC"
170 OUTPUT 70903;" TRIG:SOUR TTLT0"
180 OUTPUT 70903;" TRIG:COUN 64"
190 OUTPUT 70903;" OUTP:TTLT1:STAT ON"
200 OUTPUT 70903;"*OPC?"
210 ENTER 70903;Complete
220 OUTPUT 70903;"INIT"
230 !
Configure the switchbox so that it receives its "channel advance" trigger
240 !on TTL trigger line 1, and that it outputs its "channel closed" pulse on
250 !TTL trigger line 0. Route the signals on the multiplexer channels to the
260 !multimeter via the analog bus. Specify the scan list. Wait for the
270 !configuration to complete before proceeding.
280 OUTPUT 70914;"TRIG:SOUR TTLT1"
290 OUTPUT 70914;"OUTP:TTLT0:STAT ON"
300 OUTPUT 70914;"SCAN:PORT ABUS"
310 OUTPUT 70914;"SCAN (@100:177)"
320 OUTPUT 70914;"*OPC?"
330 ENTER 70914;Complete
340 !
Start the scan and the measurements by closing the first multiplexer
350 !channel in the channel list.
360 OUTPUT 70914;"INIT"
Continued on Next Page
52 Using the HP E1326B/E1411B Multimeter Chapter 3