Filter
Top Products
VX4101A MultiPaq Instrument User Manual
2–23
Using the VX4101A MultiPaqt Instrument
This section includes guidelines and procedures for the following operations of
the VX4101A MultiPaqtInstrument:
H Using Asynchronous Mode
Using Asynchronous Mode
Using Asynchronous Mode, the VX4101A can return responses in a different
chronological order than their associated queries. To keep track of the actual
order in which the responses are returned, the VX4101A MultiPaqtInstrument
assigns a unique tag to each response. You can define two different formats in
which to receive tags:
H ASCII format, which provides feedback in a more easily readable format
H Numeric format, which is more terse, but is easier to parse in automated test
software
For more information on VX4101A query formats, see VX4101A Operations.
In the following example the instrument is set up to return queries using ASCII
tags.
This example shows how you can use the Asynchronous Protocol to send
multiple queries without intervening VXIbus reads and still associate queries and
responses, regardless of the order in which they are sent and received.
NOTE. This example assumes that a 1 MHz signal is connected to channel 1 of
the counter and a 0.1 Volt DC signal is connected to the DMM.
Prerequisites In order to get the responses shown in the following procedures,
the instrument must have previously performed a word serial read.
NOTE. In the strict 488.2 example, sending the word serial read prematurely
could cause a bus timeout. In the Asynchronous Protocol examples, performing a
word serial read would simply cause the default empty message to be returned.
1. Enter the following command to select Asynchronous Mode:
SYST:LANG ASYN
Starting Sequence
Number