开云体育

Hi Gary, Agree with you on all points.? LEDs are the way to go, with a linear supply. Turn off devices that radiate energy, or use a test chamber (made for this purpose). -Chris

What are you looking for specifically? I have a scanjet 6300 with the ADF - I've never taken it apart, but I don't imagine there's much in there other than a stepper motor and maybe a belt or a couple

Common-mode chokes are by far the most effective way to reduce conducted emissions. Ferrite chokes are cheap and easy to apply but do require some care. Note that you need to treat EVERY cable

Actually the uncorrected response looks almost better than what I had been running. I do have a backup of the EEPROM which I took from the instrument prior to my repair attempts. I am going to try and

If this is the case than there is a chance that your correction constants are corrupted , you pretty much need to run TEST 53 which re-establishes the sampler correction constants BUT in order to run

Hi, I am looking for a copy of the above service manuals in either paper or electronic format. I already have the user and installation manual(s) for both. Sadly Google failed to find anything :-(

New Hint - Last night I saw a mention of turning off the Sampler Cor Factors OFF.? I just did this, and now the problem is gone the VNA passes Port 1 Test at least 10 times now..? Wow, it could be a

or even the sale/use of small space heaters...but then bureaucrats not understanding the full scope of their actions ( trying to regulate common sense) causing the law of unintended consequences which

Thanks, Ozan. Well I couldn't get a meaningful reading with a DVM on HUL2 so I scoped it and clearly the voltage levels at that point are randomly jumping all over the place, so it looks like you've

Yes, I plan on maintaining what I can. I have fixed a few issues with the other CPU Board (now my spare), with the GPIB Interface. I am trying to get my hands on enough spares to keep on hand. It is

On Sun, Mar 6, 2022 at 06:16 AM, Jinxie wrote: > > Ozan said about checking the PPL2 unlock indicator on A10A6 naming HUL2 as > the test point which should be at zero volts for normal operation. >

DC operated LEDs seems like the leading DIY (or "quasi~") proposition. "LED Lights and Parts" seems a pretty legit source, though I guess I'd personally need to find a similar outfit in the US.

If you plan on using and maintaining your 8753 than I strongly recommend for you to get you a powermeter and sensor , 4418A/B (E441A) have gotten fairly cheap ($200-300 but sometimes you can catch one

Why would it matter if incandescent bulbs were operated on AC or DC? As for a source of bulbs, how about multiple bulbs normally used for automobile signals and markers? They tend to be more efficient

Even if the lights on your bench don't cause interference, how about the myriad other devices in a typical home and neighborhood? I spent a weekend with a friend in a nice mountain camp that was lit

Lothar: That was a good warning!? Yes my A5 Sampler is a part number 5087-7001. My donor unit only has P/N 5087-7000. The donor unit was an OPT11, which may explain the difference in Samplers. I

A few comments on this , I have hardly ever seen any issues with the signal processing past the sampler , as far as changing the sampler keep in mind that the R and A,B channels use a different part

the ESD diodes wouldn’t go bad due to excess power , consider a few things here first of those diodes are high impedance not 50ohm they are in essence Zener diodes as a result they dont dissipate a

I checked all the cables around A5 which is the Sampler attached to Port 1. These all look good physically. I am unable to change the response by moving them or shaking them. Next, I will remove the

Hi John: That is good information. That may be an alternative later. I am evaluating circuits where I need about 100dB of dynamic range. As such, I think its important to avoid this modification if at