Sinara 7210 Clocker

JSON

Put the ext_ref_frequency field into the JSON description if the Clocker is going to use an external frequency:

{
  "hw_rev": "<hw rev>",
  "base": "<base>",
  ...
  "ext_ref_frequency": <freq in Hz>,
  ...
  "peripherals": [...]
}

On peripherals you should choose "clk_sel": 2 on connected devices.

For tests, you may need an external RF generator, depending on customer needs. Here is example setup for SynthNV RF signal generator:

Connect SynthNV to the workstation via USB, and
Install and run cutecom: nix-shell -p cutecom
Set settings as on the picture below:
Open the device, usually it is /dev/ttyACM0
Put ? into Input field and press Enter for current settings and help commands
For changing the frequency, enter f<freq in MHz>, e.g. f125.0 for 125 MHz
Set RF power so that clocker would recognize the signal with a<power> command, e.g. a63
Check for desired amplitude and frequency at the RFOut (see picture below for reference) pin via oscilloscope
If everything is ok, connect RFOut to the CLK IN on the Clocker (see instructions below for details)

Connect MMCx cables according to the customer needs and boards specifications (see image below for reference)
Connect the Clocker to the Kasli via 30-pin ports
Connect the Clocker's SMA output to the Kasli's CLK/CLK IN SMA pin
After assembling the crates and flashing the firmware, start Kasli and write config as follows: artiq_coremgmt config write -s rtio_clock ext0_bypass. Please refer to the official manual for the details and available options
Reboot either via artiq_coremgmt reboot or via power supply if the board's firmware doesn't have such command

Run artiq_sinara_test and check that it doesn't fail on the connected devices.