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Kontron/Tabor 6010 universal counter still worth getting?

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Ash:

--- Quote from: 0xdeadbeef on March 08, 2018, 08:16:41 pm ---Unfortunately, I wasn't able to get a good measurement of the 10MHz clock at J4. With my 200MHz scope and 2GSa/s sample rate, the signal looked like a rectangular DC signal with a lot of ringing. Then again I didn't dare to use the 50Ohm input but used a 10:1 probe on the 1MOhm input. I guess I'd need an active probe for a proper measurement, but still the voltage levels didn't look nearly like I expected (negative ECL stuff) but more like common CMOS levels.

--- End quote ---

If you measured the 10Mhz pin on J4 (pin 10), that is on the logic level side, before the R/C dc block / coupling. I think if you measured the 100MHz "input" pin (pin 6) you would see the ECL voltages as this is on the line that is after the R/C coupling of the 10MHz signal.

If you can use a short spring ground probe rather than the wire lead with clip, you should get a much better picture of the signal. You shouldn't need to use 50 Ohm here - that would cause issues. The signal problems would most likely be related to your grounding connection.

You want to use something like this, putting the ground bit into the nearest ground (next pin on the connector?):





--- Quote from: 0xdeadbeef on March 08, 2018, 08:16:41 pm ---Secondly, I measured the voltage at the 5V test point while I increased the current draw on the 5V pin of J4 in 100mA steps and also monitored the power consumption at the 230V side.
In a nutshell, the voltage drop on the 5V rail was negligible. Like even at 1A it dropped from 5V to 4.996V. At 300mA the voltage was like 4.998V and dropped to 4.997V at 600mA. No problem there.

--- End quote ---

Good news about the voltage rails for sure!


--- Quote from: 0xdeadbeef on March 08, 2018, 08:16:41 pm ---Finally, I took some thermal images of the bridge rectifier and the transistors of the 5V/-5.2V supply. While the temperature increase on the rectifier looks totally OK (41°C to 44°C), the temperature on the transistor increased from ~48.5°C to 57.6°C. So, yes, there is an increase but it seems acceptable also taking into account that 800mA is about the worst case scenario for the initial OCXO heat up.

--- End quote ---

Nice. So jealous of the thermal camera - one is definitely on my wish list :)

Ash.

0xdeadbeef:
Crap, you're right, I somehow forgot I wanted to measure the "100MHz" pin 6 (where the ECL 10MHz is currently located in my case) and not the 10MHz pin :(
Anyway, yeah I know the measurement is not perfect since my ground connection sucks but at least the levels look OK now.
About the thermal camera: yeah, it's one of these hacked Flir E4s that I totally wanted to have back then and admittedly haven't used much since then.
So I try to use it now and then just to justify the purchase ;)

Ash:


--- Quote from: 0xdeadbeef on March 09, 2018, 12:20:19 am ---Crap, you're right, I somehow forgot I wanted to measure the "100MHz" pin 6 (where the ECL 10MHz is currently located in my case) and not the 10MHz pin :(
Anyway, yeah I know the measurement is not perfect since my ground connection sucks but at least the levels look OK now.

--- End quote ---

Hum.. I really hope the signal doesn't look like that in reality.. very slow edges.  :scared:
 

--- Quote from: 0xdeadbeef on March 09, 2018, 12:20:19 am ---About the thermal camera: yeah, it's one of these hacked Flir E4s that I totally wanted to have back then and admittedly haven't used much since then.
So I try to use it now and then just to justify the purchase ;)

--- End quote ---

haha. Fair enough :) But surely the justification for test gear is not that you need to use it, but rather that you have it WHEN you need it  :-+

Well, at least that's how I justification my addiction.. um.. I mean investments.  ;D





0xdeadbeef:

--- Quote from: Ash on March 09, 2018, 03:15:38 am ---Hum.. I really hope the signal doesn't look like that in reality.. very slow edges.  :scared:

--- End quote ---
My current equipment doesn't allow me to make much better measurements. I still appended two screenshots taken with a 25MHz differential probe.
One shows the 10MHz signal at CMOS level and the other one the ECL level signal. The limited bandwidth sure softens the signal a bit, but I think it's fair to say that the basic shape is still visible.
So yes, the ECL signal has slower edges than the CMOS signal which kinda was to be expected.



--- Quote from: Ash ---haha. Fair enough :) But surely the justification for test gear is not that you need to use it, but rather that you have it WHEN you need it  :-+
Well, at least that's how I justification my addiction.. um.. I mean investments.  ;D

--- End quote ---
Yeah, that's exactly what I'm telling myself :)

Jay_Diddy_B:
Hi,

Is the ICS601 Obsolete?

Regards,
Jay_Diddy_B

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