Agilent Technologies 8935 Series Manual do Utilizador descarregar pdf (Página 56)

56 Chapter 2

O:\Manuals\E6380A_Progguid\Book\Measrslt.fm

Methods For Reading Measurement Results

RMB ‘ON TIMEOUT’ Example Program

Comments for Recommended Routine

Table 2-1

Program

Line

Number

Comments

50 Send a Selected Device Clear (SDC) to the Test Set to put

the HP-IB subsystem into a known state. This allows the

control program to regain programmatic control of the

Test Set if it is in an error state when the program begins

to run.

60 Command the Test Set to abort the currently executing

measurement cycle. This will force the Test Set to stop

waiting for any measurement results to be available from

measurements which may be in an invalid state when the

program begins to run.

290 Turn event initiated branches off (except ON END, ON

ERROR and ON TIMEOUT) to ensure that the Measure

function will not be exited until it is finished.

300 Set up a time-out for any I/O activity on the HP-IB. This

will allow the function to recover if the bus hangs for any

reason.

310 Set the triggering mode to single followed by a trigger

immediate command. This ensures that a new

measurement cycle will be started when the TRIG:IMM

command is sent. This sequence, that is: set to single

trigger and then send a trigger command, guarantees that

the measurement result returned to the ENTER

statement will accurately reflect the state of the DUT

when the TRIG:IMM command was sent. The ’IMM’

keyword is optional.

320 Send the query command passed to the Measure function

to the Test Set.

330 Read the measurement result.

340 Set the trigger mode to repetitive retriggering. Setting the

trigger mode to repetitive will be implementation

dependent.

350 Re-enable event initiated branching. If any event initiated

branches were logged while the Measure function was

executing they will be executed when system priority

permits.

360 Exit the Measure function and return the result value.

370 The following lines of code handle the case where the

request for a measurement result has timed out.

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 328 329

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