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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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GPIB data errors
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, |
#2
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GPIB data errors
Ancient_Hacker wrote in message
... 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 http://home.graffiti.net/diverse:graffiti.net/ |
#3
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GPIB data errors
,
Baud rate slipped due to dodgey DIP switch ? 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.... |
#4
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GPIB data errors
N Cook wrote:
Ancient_Hacker wrote in message ... 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 http://home.graffiti.net/diverse:graffiti.net/ Or maybe the new computer is to fast for the GPIB?? |
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