RE: [soft_radio] Epson SG-8002 Programmable Oscillator

[Ray Anderson]

Cecil-   The jitter specs look rather grim: something on the order of  200psec cycle-to-cycle jitter between 1 and 33 MHz, 150psec cycle-to cycle from 33 to 125 MHz.peak-to-peak jitter is on the order of  200 – 250 psec. However I understand a number of the Lowfer crowd are using them as the clock source in simple VLF transmitters. I haven’t used them for anything myself. You may be able to program them at 2x or 4x your desired frequency and divide down to reduce the jitter somewhat. Also remember that they are not exactly programmable to all frequencies withing their range. For SDR use that probably isn’t a bit deal as the s/w has at least 24kHz or so tuning range and can deal with the oscillator being al ittle bit off.   According to the Epson web site they don’t seem inclined to supply the programming software unless you buy one of their programming fixtures. I believe Digikey (amongst others) will program them to frequency when you buy through them.   73’s,   -Ray     WB6TPU           From: soft_radio@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of KD5NWA Sent: Monday, October 03, 2005 11:10 AM To: soft_radio@yahoogroups.com Cc: [EMAIL PROTECTED] Subject: [soft_radio] Epson SG-8002 Programmable Oscillator   While looking for crystals for the SR-40, I'm considering buying some Epson SG-8002 Programmable Oscillators the 50ppm type so I can dial the frequency I need that are not available in crystals. They are about $5.15 each I'm a little concerned with clock jitter (phase noise), does anyone have any experience with these chips? Cecil Bayona KD5NWA www.qrpradio.com 'Never argue with an idiot. They drag you down to their level then beat you with experience.'  YAHOO! GROUPS LINKS  Visit your group "soft_radio" on the web.    To unsubscribe from this group, send an email to:  [EMAIL PROTECTED]    Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.