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wwm101 Junior Member Offline Posts: 20 china	how to simulate CSO & CTB with spectre Feb 14^th, 2009, 4:46am CSO & CTB are the most important parameters for the CATV system. how to simulate them with spectre？ thank you in advance. ps： CSO:Composite Second Order CTB:Composite Triple Beat
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pancho_hideboo

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Re: how to simulate CSO & CTB in cadence
Reply #1 - Feb 14^th, 2009, 4:52am

If you have Agilent ADS, see "/examples/Com_Sys/CATV_prj"
http://cp.literature.agilent.com/litweb/pdf/ads2005a/examples/comsys/CATV.html

This project demonstrates how ADS can be used to measure the impact of a broadband amplifier
in a CATV system with examples of how to compute the Composite Triple Beat
and how to predict the Composite Second Order of a broadband amplifier.
It includes NTSC and PAL system video source designs to simulate video circuits and transmission.

I can't access Agilent ADS now.
Maybe you can do same tasks in Cadence Spectre.
When I have time, I will check whether this ADS examples can be realized in Cadence Spectre.

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wwm101 Junior Member Offline Posts: 20 china	Re: how to simulate CSO & CTB with spectre Reply #2 - Feb 14^th, 2009, 5:10am the content cut from a Digital TV Signal Analyzer user manul. http://www.konturm.ru/catalogy/paspeng/17series%20manual(English).pdf
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wwm101 Junior Member Offline Posts: 20 china	Re: how to simulate CSO & CTB with spectre Reply #3 - Feb 14^th, 2009, 5:19am to: pancho_hideboo thank you very much for your attention &suggestions。 i�ll try .
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als New Member Offline Posts: 5 Shin Yokohama, Japan	Re: how to simulate CSO & CTB with spectre Reply #4 - Feb 14^th, 2009, 8:01pm Greetings, Spectre RF QPSS analysis has been enhanced to support CBT analysis, attached are the results for a 132 channel example. I have not tried simulating CSO but simulating it should not be a problem either. Best Regards, Art Schaldenbrand
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pancho_hideboo

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Re: how to simulate CSO & CTB with spectre
Reply #5 - Feb 15^th, 2009, 2:23am

als wrote on Feb 14^th, 2009, 8:01pm:

Spectre RF QPSS analysis has been enhanced to support CBT analysis.

I can't find any special enhancement even in "Spectre RF New Features in MMSIM 7.1.0".
What feature is enhanced ?

In Agilent ADS, I can set any multiple tones easily in Voltage or Power Sources since their frequencies and amplitudes(powers) are defined as array.
But there are only two tones setting in Cadence "analogLib/vsource" and "analogLib/port".

Just enhancement of ability to set multiple tones in vsource and port such as 131 tones ?

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« Last Edit: Feb 15^th, 2009, 6:14am by pancho_hideboo »

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Andrew Beckett Senior Fellow Offline Life, don't talk to me about Life... Posts: 1742 Bracknell, UK	Re: how to simulate CSO & CTB with spectre Reply #6 - Feb 15^th, 2009, 5:17am Pancho Hideboo, The enhancement was back in MMSIM61 - it was to support the "freqvec" parameter on sources, to allow many tones to be specified, with (say) one missing. This is then understood by QPSS. Unfortunately there's rather limited documentation for this. Regards, Andrew.
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pancho_hideboo Senior Fellow Offline Posts: 1424 Real Homeless	Re: how to simulate CSO & CTB with spectre Reply #7 - Feb 15^th, 2009, 5:50am Spectre RF New Features in MMSIM 6.1 Composite Frequency Simulation Spectre primitive sources are enhanced to support composite frequency (for example, composite triple beat, missing tone) simulation.
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wwm101 Junior Member Offline Posts: 20 china	Re: how to simulate CSO & CTB with spectre Reply #8 - Mar 5^th, 2009, 6:22am to:als how to realize it with ic5141? can you give some examples. thank you .
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