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70128

Re: 3458A - "Error 209: Harware Failure: Timeout - Unable to read A/

I guess it all comes from when you have to caps in parallell the stray inductance and the caps will form a both a series and a parallell net, i.e. at one
Lasse Moell
7:00 AM
#70128
 
70127

Re: 3458A - "Error 209: Harware Failure: Timeout - Unable to read A/

Hughes timhughes@... [hp_agilent_equipment] wrote: ... Maybe my reading comprehension, and engineering-fu are failing me, but what you say in the above
Chuck Harris
6:42 AM
#70127
 
70126

Re: HP-8596E A16A1BT battery

Greg,       Connecting a battery as you did,sounds a very prudent idea, as the longevity of super caps,compared to most normal components is generally
Hughes
3:05 AM
#70126
 
70125

Re: Understanding FET probes

Good point, the intermod of an active probe tends to be high, often because of the
Hughes
3:00 AM
#70125
 
70124

Re: Understanding FET probes

The 100k or 1M loading difference, is only of importance to you, for loading at DC,and for loading at relatively low frequencies (<10MHz say) . Any difference
Hughes
2:42 AM
#70124
 
70123

Re: 3458A - "Error 209: Harware Failure: Timeout - Unable to read A/

Sometimes with decoupling lower values are better for reasons of
Hughes
2:07 AM
#70123
 
70122

Re: Troubleshooting/Reparing 524C Frequency Counter

There are no specific test points but certain pins on the larger (J201) of the two plug-in connectors have all the power supply voltages on them. Just be
morriso2002
11:19 PM
#70122
 
70121

Re: Troubleshooting/Reparing 524C Frequency Counter

Could you tell me where the test points are located for the power supply?
gpot97
10:02 PM
#70121
 
70120

Re: HP-8596E A16A1BT battery

You are correct in what you found regarding the supercap. I tend to err on the positive side when I get into situations with possible bad implications.. Aside
big_sky_explorer
9:58 PM
#70120
 
70119

Re: Troubleshooting/Reparing 524C Frequency Counter

Thank you for offering to help. I'm going to try out what you recommended and report back
gpot97
9:23 PM
#70119
 
70118

Re: Troubleshooting/Reparing 524C Frequency Counter

Hi, I have a lot of experience with these counters and actually have 2 of them up and running (don't ask me why!). Your problem might not necessarily be the
morriso2002
9:10 PM
#70118
 
70117

Re: Troubleshooting/Reparing 524C Frequency Counter

I tested the points you suggested. The following voltages were in reference to ground (chassis). V1200/6 = +160V (high) [pin 1 is low] V1201/1 = +40V (low)
gpot97
9:06 PM
#70117
 
70116

Re: Understanding FET probes

... I have two 54701 probes for the 54750A plugin scope and another two for the 54846B (??) 2.3 GHz scope that has this modified Clip-on-BNC with extra
Gerhard Hoffmann
8:21 PM
#70116
 
70115

Re: Understanding FET probes

Is the FET at the 85024A probe tip easily damage? Such as ESD or overload?
dicksonfuhk
8:21 PM
#70115
 
70114

Re: Troubleshooting/Reparing 524C Frequency Counter

This person also had the same problems you are having. You may want to read his log and maybe contact him for tips on troubleshooting your unit.
Merchison Burke
8:07 PM
#70114
 
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