Re: [time-nuts] Homebrew frequency counter, new board test result

2014-12-21 Thread Magnus Danielson
Li ang, Bob, On 12/20/2014 06:22 PM, Bob Camp wrote: Hi On Dec 20, 2014, at 10:28 AM, Li Ang lll...@gmail.com wrote: 4) add 74ALV2G14 since FPGA does not support schmitt input I would suggest trying it with a non-schmitt trigger part as well. It should be a simple swap out since it’s a

[time-nuts] Homebrew frequency counter, new board test result

2014-12-20 Thread Li Ang
Hi It's me again. I was debugging the new FPGA version board this week. The attached file is the test result of this new board, and 2 tests of CPLD version(2014/12/11) are also included. There are few things changed between these 2 version: 1) CPLD - FPGA 2) XC6206 - TPS79333 for TDC power

Re: [time-nuts] Homebrew frequency counter, new board test result

2014-12-20 Thread Bob Camp
Hi On Dec 20, 2014, at 10:28 AM, Li Ang lll...@gmail.com wrote: Hi It's me again. I was debugging the new FPGA version board this week. The attached file is the test result of this new board, and 2 tests of CPLD version(2014/12/11) are also included. There are few things changed between