User`s guide
Features and Functions 3
Agilent 34980A Mainframe User’s Guide 139
Remote Interface Operation (Digital Input): To assign the alarm number to
report any alarm conditions on the specified digital input channels,
use the following command.
OUTPut:ALARm[1|2|3|4]:SOURce (@<ch_list>)
To configure alarms on the specified digital input channel, use the
following commands (also see the example on the following page).
CALCulate
:COMPare:TYPE {EQUal|NEQual},(@<ch_list>)
:COMPare:DATA <data>,(@<ch_list>)
:COMPare:MASK <mask>,(@<ch_list>)
Select EQUal to generate an alarm when the data read from the port
is equal to
CALC:COMP:DATA after being masked by CALC:COMP:MASK.
Select
NEQual (not equal) to generate an alarm when the data read from
the port is not equal to
CALC:COMP:DATA after being masked by
CALC:COMP:MASK.
Use
CALC:COMP:MASK to designate the “don’t care” bits. Bits that you set
to “0” in the mask are ignored. To enable the specified alarm mode,
send the following command.
CALCulate:COMPare:STATe ON,(@<ch_list>)
Example: Configuring an Alarm on a Digital Input
The following program segment sets the digital pattern for the 34950A in
slot 3 and then enables the pattern comparison mode. When the data read
from the bank is equal to the comparison pattern, an alarm is generated
on Alarm 2.
Remote Interface Operation (Totalizer): To assign the alarm number to
report any alarm conditions on the specified totalizer channels, use the
following command.
OUTPut:ALARm[1|2|3|4]:SOURce (@<ch_list>)
To configure an alarm on a totalizer channel, specify the desired count
as the upper limit using the following command.
CALCulate:LIMit:UPPer <count>,(@<ch_list>)
To enable the upper limit on the specified totalizer channel, use the
following command.
CALCulate:LIMit:UPPer:STATe ON,(@<ch_list>)
CALC:COMP:DATA:WORD #HF6,(@3101)
CALC:COMP:TYPE EQUAL,(@3101)
OUTP:ALARM2:SOUR (@3101)
CALC:COMP:STAT ON,(@3101)
Set compare pattern (1111 0110)
Generate alarm on match
Enable alarms
Enable pattern compare mode