On Tue, May 24, 2022 at 11:58 AM, Mark Bielman wrote:
Samudra,
I did this with a KTS-250 (the smaller version, setup as 1 input x 8 outputs) and I changed everything to 50 Ohms... works great. Not sure you need to though.
Have the schematic somewhere in my stash. Not much to it. I think the resistors are in a SIP so I used the DIY method instead of buying some.
I would NOT recommend connecting all the inputs together as that would load the GPSDO too much. If you need more than 8 references, better to:
Feed GPSDO output to KTS input. Use 1 of the 8 KTS outputs and connect to another KTS input. Etc, etc. Then each KTS group will have 7 reference outputs except the last one will have 8.
Follow that?
Have fun!
Mark
Interesting.- thank you Mark. I don't mind DIY, if I had a schematic. I would appreciate a suggestion if we can convert it 50 ohm distribution. That's a resistor network at the end of the signal path or so, per the youtube video tear down I think. But if 75/50 ohm in such a small signal chain is not really critical for distributing 10 MHz, to a short few runs of BNC cable - then all the better. Yes, I did get the tip to use two stages for distribution of the 10 MHz ref clock.?
The GPSDO device is s a Chinese clone of PLL-GPSDO BG7TBL. Just arrived and waiting for it to warm up with the antenna outside my window. The output is noted as "SINE WAVE,6dBm+-2dB", so that's fairly hefty and wondering if this is useful or do we need to attenuate it for a cleaner signal? I'll hook up an oscilloscope shortly to see the 10 MHz carrier.?
Do HP equipment mind a sine-wave and not a square wave? Haven't read the big manuals yet in detail :-)?
