Hi, I'm trying to get data from a GOODWILL PPT-3615 power supply.
I can send it commands okay, and it responds, but always with missing or duplicate characters.
For instance if I ask for its identification info with *IDN? I get:
GOOODWILL PPT33615 GODWIILPPTT36615
and so on.
The GPIB cable is only one foot long.
The card works fine with a HP 3478 meter.
Any ideas?
Thanks,
Baud rate slipped due to dodgey DIP switch ?
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on
GPIB has many faults, but baud rate mismatch is not one of them. It's a parallel data with a complex handshake kind of protocol.
There may be a timing problem with the GPIB master card I'm using. Gotta get out the logic analyzer to figure it out. Almost easier to buy a better card....
Or maybe the new computer is to fast for the GPIB??
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