User`s manual

122
Chapter 5 Remote Interface Reference
3488 Mode Commands
5
LOCK <0 | 1>
Locking out the keyboard prevents the keyboard from being scanned
thus permitting faster operation.
LOCK 1 locks the keyboard and LOCK 0 (default) unlocks the keyboard.
OUTPUT 709; “LOCK 1”
! Lockout the keyboard.
MASK [<decimal value>]
Sets the SRQ mask to allow certain conditions to generate SRQ.
The decimal value loaded into the mask is equal to the sum of the values
of the conditions that will cause an SRQ interrupt as shown below:
If no value is sent with the MASK command, the 3499A/B/C will display or
output the current value of its SRQ mask to the computer.
OUTPUT 709; “MASK 8” ! Set the mask for Front Panel
SRQ key.
OUTPUT 709; “MASK 33” ! Set mask for Error (32) and
End of Scan Sequence (1).
OUTPUT 709; “MASK”
ENTER 709; A
DISP A ! The current mask value is
displayed.
Mask Bit Weighted Value Description
0 1 End of Scan Sequence
1 2 Output available
2 4 Power-on SRQ true
3 8 Not used
4 16 Ready for instructions
532Error
6 SRQ (This bit is not maskable)
7 Not used