Use OsmocomBB as OpenBTS / airprobe clock generator
vogelchr at vogel.cx
Thu Mar 15 19:11:41 UTC 2012
On Thu, 15 Mar 2012 11:51:06 +0100, Alexander Huemer
<alexander.huemer at xx.vu> wrote:
> Assuming this is the case, could something like a Schmitt trigger
> between the sine wave source and the PLL improve the situation?
> Or would that add jitter or some other negative effects to the signal?
74AC(T)04 are considered quite excellent input stages (or amplifiers for
See, for example, this posting on the "time-nuts" mailinglist (which is
to precision frequency measurement/timekeeping):
With a feedback resistors (say, a few 10kOhm) and a series input capacitor
(a few nF)
the bias-DC of the input will automatically adjust to 1/2 duty cycle.
Using anything more fancy, for example high-bandwidth comparators, is
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