[casper] ROACH1 est_brd_clk()

[Tom Kuiper]

What situations could cause est_brd_clk() to give the wrong answer?
I have two ROACH1s and a Valon 5007.  Every time we check the Valon it 
puts out the required clock frequency, 1020 MHz, at about +7 dBm.

When I initialize the ROACHs (roach1, roach2) from an ipython command 
line, est_brd_clk() in the __init__() routine finds the expected system 
clock of 255 MHz.  When the two ROACHs are initialized as part of a 
server initialization, the first ROACH initialized passes the system 
clock test and the second fails. I've reversed the order of 
initialization so it's not a specific ROACH that passes or fails.  Then 
at the end of the server initialization, I check both system clocks and 
they are then both wrong. Then, if I shut down the server and 
re-initialize the ROACHs, they both have the right system clock.

If no one has an explanation, perhaps there might be some suggestions 
for what I should try next.

Thanks and warm regards,

Tom

--
You received this message because you are subscribed to the Google Groups 
"casper@lists.berkeley.edu" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to casper+unsubscr...@lists.berkeley.edu.
To post to this group, send email to casper@lists.berkeley.edu.