[Flexradio] Ext. Reference clock kit

Title: Ext. Reference clock kit I was wondering if anyone is using a GPS to generate the 10 or 20 MHz frequency reference used with the external reference clock kit? If so, how did you do it? I have a GPS receiver (hockey puck, NEMA output) that I'd like to use for this if it is possible.

Re: [Flexradio] Ext. Reference clock kit

richard allen wrote: Message (snip) It provides accuracy of better that 1 part in 10**(-10) or 1 Hz at 10 GHz. Its 10 MHz output will drive the little conversion kit for the sdr1k available from FlexRadio. One word of caution. When 10 MHz is fed into the same socket as the present

Re: [Flexradio] Ext. Reference clock kit

Title: Message Tom et al Youse guys are going to get Jim Lux into this again! (REALLY do love your comments Jim). This is probably a do-able topic for early next year. Hey! Why not long term aging, and Loran. Not kidding. Anything is possible in software with a hardware assist,

Re: [Flexradio] Ext. Reference clock kit

I would just echo Tom's comments... you're much better off using the GPS to discipline a 200 MHz source. An even easier way is to put your (quiet) 200 MHz oscillator in a separate box (pref ovenized, but not necessarily), and then count it against the GPS tick (or the 10MHz from your Z3801).

Re: [Flexradio] Hardware interface (Linux)

Jim Lux wrote: Which of the two hardware wrappers is the current one in dttsp (the one in pyhw or pyhw2?) pyhw2 is the current version. I am informed that there are some conflicts in the way it's initialized that I have been unable to duplicate here. It's supposed to be backward compatible

Re: [Flexradio] Ext. Reference clock kit

Jim I knew i could bait you! (smile). I am sort of gobbled up by this precision thing! I do have my GPS receiver and am ready for the 1 part to the -13 (give or take a couple of exponents!). Can we take the 200 mhz standard out of the SDR 1000 as is? Actually I visit WWV frequently with

Re: [Flexradio] Ext. Reference clock kit

Philosophically, if you can avoid needing to steer your oscillator, that has two advantages: 1) The tuning pin doesn't provide an additional noise-frequency change path 2) The crystal can be higher Q, because it doesn't need to be adjustable. Sounds like an application for the Huff'n'Puff

Re: [Flexradio] Ext. Reference clock kit

Lyle Been out of it for a while. Maybe I'm being duped, but what the heck I s a Huff'n'Puff? !!! Eric -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Lyle Johnson Sent: Tuesday, September 06, 2005 8:55 PM To: FlexRadio@flex-radio.biz Subject: Re:

Re: [Flexradio] Ext. Reference clock kit

Been out of it for a while. Maybe I'm being duped, but what the heck I s a Huff'n'Puff? !!! It is a means of gently stabilizing an oscillator. It requires the oscillator to be reasonably stable already. There are several examples of this sort of circuit, pioneered by PA0KSB back in the early

Re: [Flexradio] Ext. Reference clock kit

Lyle Tnanks ... Readin Eric2 -Original Message- From: Lyle Johnson [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 06, 2005 9:11 PM To: ecellison Cc: FlexRadio@flex-radio.biz Subject: Re: [Flexradio] Ext. Reference clock kit Been out of it for a while. Maybe I'm being duped,

Re: [Flexradio] Ext. Reference clock kit

Eric wrote: Message Tom et al Youse guys are going to get Jim Lux into this again! (REALLY do love your comments Jim). This is probably a do-able topic for early next year. Hey! Why not long term aging, and Loran. Not kidding. Anything is possible in software with a