User`s guide

2-50

GPIB Tutorial and Examples

Transient Settling Times

The following transient settling (wait times) should be considered when executing GPIB

programs from an external controller or using the built-in IBASIC controller to execute

programs.

NOTE During query loops (especially for IBASIC applications), it is recommended to use a WAIT

statement like WAIT Delta_t, where Delta_t is user defined (i.e. WAIT 0.5 ! wait 0.5

seconds).

1 Each of the following operations requires checking that a certain state has been reached

before continuing with other GPIB commands:

a) Ending a Call. Wait for CELL CONTROL Call Status to be ’INACTIVE’and then

check for Call Status RR to be ’BCCH’.

OUTPUT 714;”CELL:CALL:END”

REPEAT

WAIT Delta_t

OUTPUT 714;”CELL:CALL:STATUS:STATE?” ! Query the Call Status

ENTER 714;Query$

UNTIL Query$=”””INACTIVE”””

IF (Query$=”””INACTIVE”””)

REPEAT

WAIT Delta_t

OUTPUT 714;”CELL:CALL:STAT:RR?” ! Query the RR Call Status

ENTER 714;Query$

UNTIL Query$=”””BCCH”””

END IF

b) Originating a Call. Must wait for CELL CONTROL Call Status to be

’CONNECTED’:

OUTPUT 714;”CELL:CALL:ORIG”

! Answer call when the mobile rings

REPEAT

WAIT Delta_t

OUTPUT 714;”CELL:CALL:STATUS:STATE?” ! Query the Call Status

ENTER 714;Query$

UNTIL Query$=”””CONNECTED”””