prog.book : ch15ieee.fm 4 Mon Feb 15 09:24:37 1999
IEEE488.2 Command Reference
Universal Commands
15-4 HP E4418B/E4419B Programming Guide
LLO
The LLO (Local Lock Out) command can be used to disable the front panel
local key. With this key disabled, only the controller (or a hard reset by the
line power switch) can restore local control.
PPC
When addressed to listen, the PPC (Parallel Poll Configure) command will
cause the power meter to be configured according to the parallel poll
enable secondary command which should follow this command.
PPD
Sending the PPC command followed by the PPD (Parallel Poll Disable)
command will disable the power meter from responding to a parallel poll.
This is effectively a selective disable.
Table 15-1: PPD Mapping
PPE
Once the power meter has received a PPC command, the PPE (Parallel Poll
Enable) secondary command configures the power meter to respond to a
parallel poll on a particular data line with a particular level.
Bit Weight Meaning
0 1 Always 0
1 2 Always 0
2 4 Always 0
3 8 Always 0
4 16 Always 1
5 32 Always 1
6 64 Always 1
7 128 Always 0
To Next Page
Loading...
Need help?
General
