All,
I re-ran the -1 dB passband test of the 70 cm receiver for my presentation.
Here's another look at a 500 kHz span at 0.5 dB/Div:
Here's a look at the -60 dB passband with a 2 MHz span and 5 dB/div. I increased the input
Level to get the skirts out of the noise. It's 1.248 MHz wide at -60 dBc.
Juan - WA6HTP
I have some thoughts on this (ripple), after some research I did late last night. More later. 73, Jim
Juan Rivera wrote:
All,
I re-ran the -1 dB passband test of the 70 cm receiver for my presentation.
Here's another look at a 500 kHz span at 0.5 dB/Div:
Here's a look at the -60 dB passband with a 2 MHz span and 5 dB/div. I increased the input
Level to get the skirts out of the noise. It's 1.248 MHz wide at -60 dBc.
Juan - WA6HTP
Via the Eagle mailing list courtesy of AMSAT-NA [email protected] http://amsat.org/mailman/listinfo/eagle
Jim,
The component came in that I need to try John's last circuit change. Once I put this paper behind me I'll get them installed and see what happens.
73,
Juan
_____
From: Jim Sanford [mailto:[email protected]] Sent: Sunday, July 22, 2007 4:23 AM To: [email protected] Cc: [email protected]; Bill Ress; Dave Black (Home); Dave Black (Work); Dave hartzell; David Smith; Don Ferguson; Juan.Rivera (Work); Samsonoff@Mac. Com Subject: Re: [eagle] 70 cm Passband at -1 dB and -60 dB
I have some thoughts on this (ripple), after some research I did late last night. More later. 73, Jim
Juan Rivera wrote:
All,
I re-ran the -1 dB passband test of the 70 cm receiver for my presentation.
Here's another look at a 500 kHz span at 0.5 dB/Div:
Here's a look at the -60 dB passband with a 2 MHz span and 5 dB/div. I increased the input
Level to get the skirts out of the noise. It's 1.248 MHz wide at -60 dBc.
Juan - WA6HTP
_____
_______________________________________________ Via the Eagle mailing list courtesy of AMSAT-NA [email protected] http://amsat.org/mailman/listinfo/eagle
I received an email from from Mentor Graphics indicating that the OrCAD software that AMSAT has licensed is being disontinued:
» Cadence is discontinuing OrCAD Layout Long anticipated, Cadence has finally begun the end-of-life (EOL) process for OrCAD Layout. Cadence distributors emailed their customers in late June that:
'Effective July 31, 2007, Cadence will no longer sell ... OrCAD Layout based technology products¿ We acknowledge that transitioning software systems is never easy and is often a juggling act between investing in learning new technologies and meeting current business priorities.'
Their only recommended transition path is a move to Allegro technology - infamous for its hard-to-learn, expensive, high-speed upgrades.
This would leave PADS as the only viable layout software. Has anyone heard from Cadence directly?
73,
John KD6OZH
Hello John!
I received an email from from Mentor Graphics indicating that the OrCAD software that AMSAT has licensed is being disontinued: ... This would leave PADS as the only viable layout software. Has anyone heard from Cadence directly?
Not exactly. While Cadence is dropping LAYOUT, they are promoting their ALLEGRO product.
73,
Lyle KK7P
Does AMSAT have a license to Allegro or should everyone use PADS.
73,
John KD6OZH
----- Original Message ----- From: "Lyle Johnson" [email protected] To: "John B. Stephensen" [email protected] Cc: [email protected] Sent: Tuesday, July 24, 2007 19:54 UTC Subject: Re: [eagle] PCB Software
Hello John!
I received an email from from Mentor Graphics indicating that the OrCAD software that AMSAT has licensed is being disontinued: ... This would leave PADS as the only viable layout software. Has anyone heard from Cadence directly?
Not exactly. While Cadence is dropping LAYOUT, they are promoting their ALLEGRO product.
73,
Lyle KK7P
John B. Stephensen wrote:
Does AMSAT have a license to Allegro or should everyone use PADS.
AMSAT has both.
Lyle
73,
John KD6OZH
----- Original Message ----- From: "Lyle Johnson" [email protected] To: "John B. Stephensen" [email protected] Cc: [email protected] Sent: Tuesday, July 24, 2007 19:54 UTC Subject: Re: [eagle] PCB Software
Hello John!
I received an email from from Mentor Graphics indicating that the OrCAD software that AMSAT has licensed is being disontinued: ... This would leave PADS as the only viable layout software. Has anyone heard from Cadence directly?
Not exactly. While Cadence is dropping LAYOUT, they are promoting their ALLEGRO product.
73,
Lyle KK7P
They have been pushing Allegro (AKA PCB Designer) very hard for the past year. Worst than that, beware of upgrading to version 16. They also changed the licensing structure and eliminated the floating license. They now only support MAC lock, or license server. On the bright side, since they are discontinuing it we shouldnt expect any new bugs, I mean features introduced.
Assi
_____
From: [email protected] [mailto:[email protected]] On Behalf Of John B. Stephensen Sent: Tuesday, July 24, 2007 12:50 PM To: [email protected] Subject: [eagle] PCB Software
I received an email from from Mentor Graphics indicating that the OrCAD software that AMSAT has licensed is being disontinued:
»
Cadence is discontinuing OrCAD Layout Long anticipated, Cadence has finally begun the end-of-life (EOL) process for OrCAD Layout. Cadence distributors emailed their customers in late June that:
'Effective July 31, 2007, Cadence will no longer sell ... OrCAD Layout based technology products¿ We acknowledge that transitioning software systems is never easy and is often a juggling act between investing in learning new technologies and meeting current business priorities.'
Their only recommended transition path is a move to Allegro technology - infamous for its hard-to-learn, expensive, high-speed upgrades.
This would leave PADS as the only viable layout software. Has anyone heard from Cadence directly?
73,
John
KD6OZH
participants (5)
-
Assi Friedman -
Jim Sanford -
John B. Stephensen -
Juan Rivera -
Lyle Johnson