Using the Multiplexer
53
Detecting Error Conditions
There are two general approaches to error checking. The simplest, but most
time consuming, is to ask the instrument whether there are errors at every
step of the switching process. This is called “polling” and is illustrated in the
two previous program examples.
Using Interrupts
With Error
Checking
The second approach involves the use of interrupts. In this approach, the
program monitors the Multiplexer's Standard Event Status Register for an
error condition. If no errors occur, the Multiplexer functions as
programmed. If errors do occur, the Multiplexer interrupts the computer,
and the error codes and messages are read from the error queue.
Analog Bus
2-Wire Resistance
Measurements
[ROUTe:]SCAN:MODE RES sets the scanning mode to 2-wire resistance
measurements. The current source from the ohmmeter to the unknown
resistance is supplied over analog bus lines H2 and L2. The RES mode
closes Tree relays T9 and T2 which connect H2 to H1 and L2 to L1. This
configuration allows H2 and L2 to source the current through the unknown
resistance and H1 and L1 to sense the voltage and make the resistance
measurement. You must make this connection manually if you use the
FUNCtion mode NONE or register program the multiplexer and desire
2-wire ohms measurements.
Содержание E8462A
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Страница 10: ...8 Notes...
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Страница 15: ...Configuring the Agilent E8462A Multiplexer 13 Figure 1 1 Agilent E8462A Simplified Schematic...
Страница 68: ...66 Using the Multiplexer...
Страница 104: ...102 Agilent E8462A Relay Multiplexer Command Reference...
Страница 118: ...116 Agilent E8462A Relay Multiplexer Command Reference...
Страница 126: ...124 Agilent E8462A Scanning Voltmeter Application Examples Chapter 4 Notes...
Страница 146: ...144 Register Based Programming...
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