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Message-ID: <F5A34FEF31C84726AEC438065198AEDC@p4>
From: "Mark" <markhughes1@blueyonder.co.uk>
To: <rsgb_lf_group@blacksheep.org>
References: <001401c9fc9c$938f2760$0301a8c0@mal769a60aa920> <BCB97AB9395D4D9E89B76B6C3E69304F@p4> <006b01c9fd86$2acc8020$0301a8c0@mal769a60aa920>
Date: Sun, 5 Jul 2009 20:54:53 +0100
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Subject: LF: Re: Re: Re: Mc Coy
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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
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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
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--------
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/=
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<DIV><FONT size=3D2 face=3DArial>Mal,</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>no problem, the info is indeed a bit=
limited about=20
the Hz/V for the adjustment.</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>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. </FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>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.</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>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.</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>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 </FONT></DIV>
<DIV><FONT size=3D2 face=3DArial></FONT> </DIV>
<DIV><FONT size=3D2 face=3DArial>Regards</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>mark</FONT></DIV>
<BLOCKQUOTE style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT:=
5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color:=
black"><B>From:</B>=20
<A title=3Dg3kevmal@talktalk.net href=3D"mailto:g3kevmal@talktalk.ne=
t">mal=20
hamilton</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A title=3Drsgb_lf_group@=
blacksheep.org href=3D"mailto:rsgb_lf_group@blacksheep.org">rsgb_l=
f_group@blacksheep.org</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Sunday, July 05, 2009=
4:35 PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> LF: Re: Re: Mc Coy</=
DIV>
<DIV><BR></DIV>
<DIV><FONT size=3D2 face=3DArial>Mark</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>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.</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>73 de mal/g3kev</FONT></DIV>
<DIV> </DIV>
<BLOCKQUOTE style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEF=
T: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV=
>
<DIV style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; font-co=
lor: black"><B>From:</B>=20
<A title=3Dmarkhughes1@blueyonder.co.uk href=3D"mailto:markh=
ughes1@blueyonder.co.uk">Mark</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A title=3Drsgb_l=
f_group@blacksheep.org href=3D"mailto:rsgb_lf_group@blacksheep.o=
rg">rsgb_lf_group@blacksheep.org</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Saturday, July 04, 20=
09 1:37=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> LF: Re: Mc Coy</DI=
V>
<DIV><BR></DIV>
<DIV><FONT size=3D2 face=3DArial>30 sec search on the internet</FO=
NT></DIV>
<DIV><FONT size=3D2 face=3DArial><A href=3D"http://www.datas=
heetarchive.com/pdf-datasheets/Datasheets-110/DSAP004237.pdf">http://w=
ww.datasheetarchive.com/pdf-datasheets/Datasheets-110/DSAP004237.pdf</=
A></FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>Mark<A href=3D"http://www.d=
atasheetarchive.com/download/?url=3Dhttp%3A%2F%2Fwww.datasheetarchive.=
com%2Fpdf-datasheets%2FDatasheets-110%2FDSAP004237.pdf"></A></FONT></D=
IV>
<BLOCKQUOTE style=3D"BORDER-LEFT: #000000 2px solid; PADDING=
-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </D=
IV>
<DIV style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4; fon=
t-color: black"><B>From:</B>=20
<A title=3Dg3kevmal@talktalk.net href=3D"mailto:g3kevmal@talktal=
k.net">mal=20
hamilton</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A title=3Drs=
gb_lf_group@blacksheep.org href=3D"mailto:rsgb_lf_group@blacks=
heep.org">rsgb</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Saturday, July 04,=
2009 12:42=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> LF: Mc Coy</DIV>
<DIV><BR></DIV>
<DIV><FONT size=3D2 face=3DArial>Hi all</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>Does anyone have data for Mc Co=
y electronics=20
XTAL OSCILLATOR MC137X7-001W 10.000 MHz</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>SN72758-126</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>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.</FON=
T></DIV>
<DIV><FONT size=3D2 face=3DArial>73 mal/g3kev</FONT></DIV>
<DIV> </DIV>
<P>
<HR>
<P></P><BR>No virus found in this incoming message.<BR>Checked=
by AVG -=20
www.avg.com <BR>Version: 8.5.375 / Virus Database: 270.13.3/2217=
- Release=20
Date: 07/03/09 18:11:00<BR></BLOCKQUOTE>
<P>
<HR>
<P></P><BR>No virus found in this incoming message.<BR>Checked by=
AVG -=20
www.avg.com <BR>Version: 8.5.375 / Virus Database: 270.13.3/2217=
- Release=20
Date: 07/03/09 18:11:00<BR></BLOCKQUOTE>
<P>
<HR>
<P></P><BR>No virus found in this incoming message.<BR>Checked by AV=
G -=20
www.avg.com <BR>Version: 8.5.375 / Virus Database: 270.13.4/2218 -=
Release=20
Date: 07/04/09 17:55:00<BR></BLOCKQUOTE></BODY></HTML>
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