I'm planning to connect two Bodnar dual-output reference clocks to my 4 KiwiSDRs.  I already have one working successfully with my AirSpy R2 using its default configuration.

I understand I will have to change the Kiwi/admin/Config settings:

- turn on External ADC clock

- enter External clock frequency (66666600 Hz), and

- turn off GPS clock correction.

Will any of the other Bodnar configuration settings (besides frequency) need to be changed to work with the KiwiSDRs?

Once the Kiwi:admin:config page has the external clock frequency entered, and I would suggest 66.600000 MHz as a better choice for the setting at both the Kiwi and Bodnar due to improved spur/noise performance of smaller integers, as long as there is ~1V p-p at the Kiwi it should run OK.  External Clock over-rides native GPS Kiwi correction so I don't think turning it off is necessary.  You'll need to deal with fan out and any gain, transformation to have the single Bodnar output drive 4 Kiwis simultaneously. 

You may have to come up with your own numbers (bottom of the Bodnar configurator) in order to find a good solution for simultaneous 10 and [66.6] MHz outputs from a dual output Bodnar, if that's what you are to use. If the configurator won't give you what you need, 'ClockBuilder' (should be available on the Analog Devices site since Silicon Labs has changed hands a couple of times) will give you more detail and degrees of freedom than Bodnar. Again depends on which Bodnar unit you use, I think. The newer ones use the SI5328 though SI5351 may be a stand-in for the register values to generate the frequencies you need.  I can't tell if you need to keep the 10 MHz or can dedicate a Bodnar to the Kiwis. If that, then there should be no problem using Bodnar's configurator.

Glenn n6gn

With the dual-output model you'll be fine setting them both to the same frequency.  You may be able to drive two pairs of Kiwis, one pair from each output possibly with the output current setting turned up, if you keep the cables pretty short.

An easy way to connect the external clock into a Kiwi is to use an SMD connector, soldered to the available pads,  and an inexpensive adapter cable

with the SMA end mounted in a 1/4" hole punched or drilled in a Kiwi enclosure end plate.

You'll still need to adapt, and perhaps tee, to the BNC on the Bodnar but isn't critical.  If you use two short BNC <==> SMA cables to a tee on each output  you can probably get away with four Kiwis on a single Bodnar.