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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
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4th Mar 2015, 3:06 pm | #21 | |
Nonode
Join Date: Jan 2009
Location: Bristol, UK.
Posts: 2,059
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Re: 'Scope Probes
Quote:
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4th Mar 2015, 4:29 pm | #22 |
Nonode
Join Date: Jan 2010
Location: Edinburgh, UK.
Posts: 2,008
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Re: 'Scope Probes
The 465 and 468 scopes use this method as well.
The 465 has only X1 and X10 switching so a shorting pin is ok. The 468 has X1, X10 and X100 so uses the resistance method. Al
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I won't tell you how I discovered that. |
4th Mar 2015, 6:20 pm | #23 |
Octode
Join Date: Jan 2012
Location: Wimbledon, London, UK.
Posts: 1,464
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Re: 'Scope Probes
Are you sure about this? I have the manuals for the 464, 465, 466, 468 and 475A And there is no mention of X100 sensing in any of them. The manuals generally state that for checking, an 11k resistor can be used to connect to ground instead of a X10 probe. I also have the 'scopes 464, 466, 468 and 475A and I can only see windows for the X1 and X10 illumination.
For reference, the 464 and 466 are storage crt types, the 465 is plain vanilla 2-channel and the 468 is a DSO; all these have 100MHz bandwidth. The 475A has a bandwidth of 250MHZ. |