Return-Path: Received: from rly-mg02.mx.aol.com (rly-mg02.mail.aol.com [172.20.83.108]) by air-mg09.mail.aol.com (v124.15) with ESMTP id MAILINMG094-9fb4a510536385; Sun, 05 Jul 2009 15:55:57 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mg02.mx.aol.com (v124.15) with ESMTP id MAILRELAYINMG025-9fb4a510536385; Sun, 05 Jul 2009 15:55:36 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1MNXnd-0006YW-LD for rs_out_1@blacksheep.org; Sun, 05 Jul 2009 20:54:57 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1MNXnc-0006YM-UK for rsgb_lf_group@blacksheep.org; Sun, 05 Jul 2009 20:54:56 +0100 Received: from smtp-out4.blueyonder.co.uk ([195.188.213.7]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1MNXna-0006JY-BO for rsgb_lf_group@blacksheep.org; Sun, 05 Jul 2009 20:54:55 +0100 Received: from [172.23.170.142] (helo=anti-virus02-09) by smtp-out4.blueyonder.co.uk with smtp (Exim 4.52) id 1MNXna-0003iy-9s for rsgb_lf_group@blacksheep.org; Sun, 05 Jul 2009 20:54:54 +0100 Received: from [92.235.33.173] (helo=p4) by asmtp-out1.blueyonder.co.uk with smtp (Exim 4.52) id 1MNXnZ-00084e-J8 for rsgb_lf_group@blacksheep.org; Sun, 05 Jul 2009 20:54:53 +0100 Message-ID: From: "Mark" To: References: <001401c9fc9c$938f2760$0301a8c0@mal769a60aa920> <006b01c9fd86$2acc8020$0301a8c0@mal769a60aa920> Date: Sun, 5 Jul 2009 20:54:53 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Karma: unknown: X-Spam-Score: 3.4 (+++) X-Spam-Report: autolearn=disabled,FORGED_MUA_OUTLOOK=3.36,HTML_MESSAGE=0.001 Subject: LF: Re: Re: Re: Mc Coy Content-Type: multipart/alternative; boundary="----=_NextPart_000_0053_01C9FDB2.D8553A80" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.4 required=5.0 tests=FORGED_MUA_OUTLOOK,HTML_30_40, HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-AOL-IP: 193.82.116.20 ------=_NextPart_000_0053_01C9FDB2.D8553A80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Mal, no problem, the info is indeed a bit limited about the Hz/V for the ad= justment. The data sheet seems to suggest that the control voltage is capable of= modulating the oscillator, which implies a fast slew rate. This is no= t particularly good if you intend to just use the oscillator as a fixe= d frequency source. It means you must filter the control voltage bette= r.=20 Of course using the source at low frequencies, none of the issues of= this type of source will manifest themselves significantly, but it is= probable that the performance of a microwave local oscillator locked= to one of these may be a bit noisy. To better understand the unit's characteristics, measure the frequency= at extremes of the control voltage range. That is about all the infor= mation that is missing. most oscillators of this type have a fairly limited tuning range, so= you may find pulling the unit to your desired frequency on 500KHz is= not possible. To reach 505 KHz the oscillator must pull to 10.1MHz,= which is a large excursion for oscillators of this type 10 Hz in 10= MHz is 1ppm. 100KHz in 10 MHz is 10,000 PPM=20 Regards mark ----- Original Message -----=20 From: mal hamilton=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Sunday, July 05, 2009 4:35 PM Subject: LF: Re: Re: Mc Coy Mark Osc fired up and working fb. I was looking for more detailed info ab= out ctl voltages ie V versus Freq. This unit is marked 10Mhz when supp= lied with 5V ctl voltage, and this is spot on with 6v TTL output. 73 de mal/g3kev ----- Original Message -----=20 From: Mark=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Saturday, July 04, 2009 1:37 PM Subject: LF: Re: Mc Coy 30 sec search on the internet http://www.datasheetarchive.com/pdf-datasheets/Datasheets-110/DSAP= 004237.pdf Mark ----- Original Message -----=20 From: mal hamilton=20 To: rsgb=20 Sent: Saturday, July 04, 2009 12:42 PM Subject: LF: Mc Coy Hi all Does anyone have data for Mc Coy electronics XTAL OSCILLATOR MC1= 37X7-001W 10.000 MHz SN72758-126 This is a module and requires +5v, +15v sealed unit but has an= adjuster and I expect the osc can be shifted slightly, but enough to= be useful for 500 Khz divided down. 73 mal/g3kev ----------------------------------------------------------------------= ---- No virus found in this incoming message. Checked by AVG - www.avg.com=20 Version: 8.5.375 / Virus Database: 270.13.3/2217 - Release Date:= 07/03/09 18:11:00 ----------------------------------------------------------------------= ------ No virus found in this incoming message. Checked by AVG - www.avg.com=20 Version: 8.5.375 / Virus Database: 270.13.3/2217 - Release Date:= 07/03/09 18:11:00 ----------------------------------------------------------------------= -------- No virus found in this incoming message. Checked by AVG - www.avg.com=20 Version: 8.5.375 / Virus Database: 270.13.4/2218 - Release Date: 07/= 04/09 17:55:00 ------=_NextPart_000_0053_01C9FDB2.D8553A80 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Mal,
no problem, the info is indeed a bit= limited about=20 the Hz/V for the adjustment.
The data sheet seems to suggest that&= nbsp;the=20 control voltage is capable of modulating the oscillator, which implies= =20 a fast slew rate. This is not particularly good if you intend to= =20 just use the oscillator as a fixed frequency source. It means you= must=20 filter the control voltage better.
Of course using the source at low fre= quencies, none=20 of the issues of this type of source will manifest themselves signific= antly, but=20 it is probable that the performance of a microwave local oscillator lo= cked to=20 one of these may be a bit noisy.
To better understand the unit's= =20 characteristics, measure the frequency at extremes of the control volt= age range.=20 That is about all the information that is missing.
most oscillators of this type have a= fairly limited=20 tuning range, so you may find pulling the unit to your desired frequen= cy on=20 500KHz is not possible.   To reach 505 KHz the oscillat= or must=20 pull to 10.1MHz, which is a large excursion for oscillators of this ty= pe 10 Hz=20 in 10 MHz is 1ppm. 100KHz in 10 MHz  is 10,000 PPM
 
Regards
mark
----- Original Message -----
From:=20 mal=20 hamilton
Sent: Sunday, July 05, 2009= 4:35 PM
Subject: LF: Re: Re: Mc Coy

Mark
Osc fired up and working fb. I was= looking for=20 more detailed info about ctl voltages ie V versus Freq. This un= it is=20 marked 10Mhz when supplied with 5V ctl voltage, and this is spot on= with 6v=20 TTL output.
73 de mal/g3kev
 
----- Original Message -----
From:=20 Mark
Sent: Saturday, July 04, 20= 09 1:37=20 PM
Subject: LF: Re: Mc Coy

30 sec search on the internet
Mark
----- Original Message -----
From:=20 mal=20 hamilton
To: rsgb
Sent: Saturday, July 04,= 2009 12:42=20 PM
Subject: LF: Mc Coy

Hi all
Does anyone have data for Mc Co= y electronics=20 XTAL OSCILLATOR MC137X7-001W 10.000 MHz
SN72758-126
This is a module and requires= +5v, +15v=20 sealed unit but has an adjuster and I expect the osc can be shif= ted=20 slightly, but enough to be useful for 500 Khz divided down.
73 mal/g3kev
 


No virus found in this incoming message.
Checked= by AVG -=20 www.avg.com
Version: 8.5.375 / Virus Database: 270.13.3/2217= - Release=20 Date: 07/03/09 18:11:00


No virus found in this incoming message.
Checked by= AVG -=20 www.avg.com
Version: 8.5.375 / Virus Database: 270.13.3/2217= - Release=20 Date: 07/03/09 18:11:00


No virus found in this incoming message.
Checked by AV= G -=20 www.avg.com
Version: 8.5.375 / Virus Database: 270.13.4/2218 -= Release=20 Date: 07/04/09 17:55:00
------=_NextPart_000_0053_01C9FDB2.D8553A80--