In message 5528ac6f.3030...@williams-net.com, new writes:
QUESTION - will this kill the 3458 or its display somehow?
Unlikely. Unfortunately it doesn't really help the display that
much either, as long as the filament is powered, the wearout mechanism
works, it's just faster for pixels
Hi Poul,
In my experience, there are two very significant wear
mechanisms: 1) cathode emission, 2) phosphor fatigue.
They seem to both run at about the same speed.
-Chuck Harris
Poul-Henning Kamp wrote:
In message 5528ac6f.3030...@williams-net.com, new writes:
QUESTION - will this
In message 00bc01d07473$7a7344a0$6f59cde0$@gmail.com, Don@True-Cal writes:
DISP? 3 (Clr) is the one in question rather is removes power to
the display filament providing some help for display life.
As far as I can see from my reverse engineering, it just prints a
blank string.
--
The 3458A DISP? command, rather entered from the front panel or via a GPIB
Command is not adequately discussed in the User's Manual IMO. There are four
numeric values 0,1,2 3 plus the ability to enter a string value as mentioned
below. All four values are supported via the GPIB, but only 0,1 2
From visual inspection, the filaments in these
vacuu-fluroescent displays look like bare wire,
which would make them some sort of doped tungsten
alloy.. which doesn't really ever wear out.
The only problems I have ever seen is due to
phosphor fatigue. The display stops glowing
on whichever
Google that and you should find a seminar sponsored by Keysight,
scheduled for Tuesday, April 14, 2015 1:00pm ET / 10:00am PT (I'll
convert to GMT later)
Trouble is, it is streamed in a Windows format.
Dr. David Kirkby Ph.D CEng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge,
Solved — bad capacitor between the bases of the upper pair of cascode
amplifiers on the horizontal output amp. Whew. This 5111A has a deflection HV
amp board from a 5110, which certainly made troubleshooting more difficult….
Dick
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volt-nuts
Probably a wonkey electrolytic cap... In the old TV days, this was usually
caused by a coupling capacitor, not a filter capacitor.
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I have fielded two dozen pieces of equipment with 2x16 VFD from Noritake. These
are on 24/7 and they were shipped over a 4 year period starting in 2000. In
normal state, there are 4 digits always turned on on the first line. The other
digits are rarely turned on.
The displays start being
