Hi Thomas.
Digikey part numbers links: C82 = 100pFhttp://www.digikey.com/product-detail/en/C0603C101J5GACTU/399-1061-1-ND/411336, C83=1500pFhttp://www.digikey.com/product-detail/en/C0603C152K5RACTU/399-1084-1-ND/411359, C84=33pFhttp://www.digikey.com/product-detail/en/C0603C330J5GACTU/399-1055-1-ND/411330, R106=2.2khttp://www.digikey.com/product-detail/en/RMCF0603JT2K20/RMCF0603JT2K20DKR-ND/1944084, R109=3.3khttp://www.digikey.com/product-detail/en/RMCF0603JT3K30/RMCF0603JT3K30CT-ND/1943182, L6=0.022uFhttp://www.digikey.com/product-detail/en/C0603C223K5RACTU/399-1280-1-ND/416056 .
But you'll remove 100pF capasitor from position C45, so you could use it for C82. BTW, how long time required to delivering from the DigiKey?
Best regards, Andrey Sviyazov.
2012/7/25 Thomas Tsou ttsou@vt.edu
Hi Andrey,
I will need to order parts. Can you give me a list of digikey part numbers for the required components?
Thomas
On Tue, Jul 24, 2012 at 5:56 PM, Andrey Sviyazov andrey.sviyazov@fairwaves.ru wrote:
Hi Thomas.
Could you please make test again for LO integral phase noise and
modulation
accuracy with PLL loop filter 100kHz and ICP=0.4mA (or above), as Srdjan suggested us. I've assembled 100kHz loop filter with the next components: C82 = 100pF, C83=1500pF, C84=33pF, R106=2.2k, R109=3.3k. To get good noises replace choke L6 by capacitor 10nF..22nF and remove
C45.
I ask you because I have to send final BOM as soon as possible to avoid delay of UmTRXv2 production due to changes for improvements.
Best regards, Andrey Sviyazov. P.S. Pictures attached just to be sure.
2012/7/23 Andrey Sviyazov andrey.sviyazov@fairwaves.ru
Perhaps this is a silly question, but how do I calibrate the clock?
or
use an external reference signal?
Andrey Sviyazov - does ClockIn works as external input in UmTRXv1?
Yes, 5V cmos level required or smaller with DC offset to get 2.5V symmetry. Turn switches to MHz and slave positions.
Best regards, Andrey Sviyazov. (Sent from my mobile client)