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Kontron/Tabor 6010 universal counter still worth getting?
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0xdeadbeef:
Yeah, I need to get over 50€ to get free shipping. But I guess this won't be much of a problem - just time consuming ;)

Side note: I looked a bit more into the schematic and it looks like simply connecting a 100MHz oscillator won't do the job.
There seems to be some +/-5V level shifting going on at the output So I guess I will replicate that circuit.

While I'm at it, I guess I will also replicate the 10MHz external reference input/output circuit using the 74F132 NAND-Schmitt-Triggers (funnily they are called Schmidt-Triggers in the manual which is actually the more common German spelling).
Ash:

--- Quote from: 0xdeadbeef on March 02, 2018, 06:56:34 pm ---Side note: I looked a bit more into the schematic and it looks like simply connecting a 100MHz oscillator won't do the job.
There seems to be some +/-5V level shifting going on at the output So I guess I will replicate that circuit.

While I'm at it, I guess I will also replicate the 10MHz external reference input/output circuit using the 74F132 NAND-Schmitt-Triggers (funnily they are called Schmidt-Triggers in the manual which is actually the more common German spelling).

--- End quote ---

It appears to be a buffer/driver. On the main board, it is driving 2 ECL based NOR gates. There seems to be a biasing network around U25c(?) which along with the series resistor/capacitor R106/C69(?) for AC coupling is how the 10MHz signal gets through from a standard logic gate..

I can't see Q1 being a level shifter as the output is capacitively coupled (C3). I'm thinking its setup as a buffer and driver from the ECL VCO U7 (MC1648).

Q2 is interesting as well, it seem to be disabling the output if the phase comparator is generating longish pulses meaning that it is not locked. The zener is a 6.2V device, so when the output of U2a NAND goes high it will conduct and allow current into the NPN base and therefore shunt the output signal. If I'm reading that correctly.. pretty clever level shifting happening there :)

Maybe stick a scope on the line and see what the signal looks like using your current 10MHz osc on the board, then try replicate that. I'm guessing that a modern fast logic gate, capacitively coupled would work. If you have a signal generator you could mock up a driver using a gate and drive it from the sign gen and see the result on a scope.. check the output of the ECL NOR gates as well. Would tell you if it will work.

I don't have any experience with ECL, I'm sure there are others here who could glance at the schematic and tell you for sure what you need :)

Ash.
0xdeadbeef:
Well, the output of the normal 5ppm oscillator and the external reference is definitely created vby a TTL NAND gate (74F132). When I follow this signal into the "Measurement Logic circuit", it's simply connected to the ECL NOR gate through a series 820Ohm resistor and 100nF capacitor. So I guess this is exactly what I need to connect my TCXO/OCXO output to the 100MHz input.
Quickly checked this with LTSpice and it looks somewhat promising:
Ash:

--- Quote from: 0xdeadbeef on March 04, 2018, 05:10:43 pm ---Well, the output of the normal 5ppm oscillator and the external reference is definitely created vby a TTL NAND gate (74F132). When I follow this signal into the "Measurement Logic circuit", it's simply connected to the ECL NOR gate through a series 820Ohm resistor and 100nF capacitor. So I guess this is exactly what I need to connect my TCXO/OCXO output to the 100MHz input.
Quickly checked this with LTSpice and it looks somewhat promising:

--- End quote ---

Looks like it should work :)

Have fun!

Ash.
0xdeadbeef:
Did some schematic design today. Mainly copied the circuitry from the manual and added my OCXO, a 3.3V supply and the ICS601-01 as multiplier.
I also replaced the 74F132 with a MC74ACT132 and the 1N4151 diodes with a (double) BAV99.
I also started with the PCB. It should fit quite easily into a 5x5cm PCB. I'm a bit uncertain if I should solder the shielded wire to the 10MHhz reference input/output directly to the PCB or use some kind of SMB connector.
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