|
If Superheterodyne, why not Subheterodyne?
A terminology question I suppose about the derivation of the term
"Superheterodyne" more than anything else: Does the "Super" actually mean anything? Is there a Subheterodyne? Traditionally superhets mix a higher radio frequency down to a lower IF frequency, but certainly in the past few decades radios with IF's above the RF frequency have become very common in broadband applications, and those are still called superhets, not subhets :-). Google turns up a couple hits on subheterodyne but other than one that might mean "IF higher in frequency than RF" I don't recognize what they mean.. I suspect that "Super" was more a marketing term than anything else :-). Tim N3QE |
If Superheterodyne, why not Subheterodyne?
On Apr 20, 5:50 pm, Tim Shoppa wrote:
A terminology question I suppose about the derivation of the term "Superheterodyne" more than anything else: Does the "Super" actually mean anything? Is there a Subheterodyne? Traditionally superhets mix a higher radio frequency down to a lower IF frequency, but certainly in the past few decades radios with IF's above the RF frequency have become very common in broadband applications, and those are still called superhets, not subhets :-). Google turns up a couple hits on subheterodyne but other than one that might mean "IF higher in frequency than RF" I don't recognize what they mean.. A superheterodyne can be Supradyne or Infradyne, depending of the IF against the RF. I suspect that "Super" was more a marketing term than anything else :-). I don't superthink so. |
If Superheterodyne, why not Subheterodyne?
On Mon, 20 Apr 2009 09:50:05 -0700 (PDT), Tim Shoppa
wrote: A terminology question I suppose about the derivation of the term "Superheterodyne" more than anything else: Does the "Super" actually mean anything? Is there a Subheterodyne? Traditionally superhets mix a higher radio frequency down to a lower IF frequency, but certainly in the past few decades radios with IF's above the RF frequency have become very common in broadband applications, and those are still called superhets, not subhets :-). Google turns up a couple hits on subheterodyne but other than one that might mean "IF higher in frequency than RF" I don't recognize what they mean.. I suspect that "Super" was more a marketing term than anything else :-). Tim N3QE Supersonic. http://en.wikipedia.org/wiki/Superheterodyne_receiver John |
If Superheterodyne, why not Subheterodyne?
On Apr 20, 1:10*pm, John Larkin
wrote: On Mon, 20 Apr 2009 09:50:05 -0700 (PDT), Tim Shoppa wrote: A terminology question I suppose about the derivation of the term "Superheterodyne" more than anything else: Does the "Super" actually mean anything? Is there a Subheterodyne? Traditionally superhets mix a higher radio frequency down to a lower IF frequency, but certainly in the past few decades radios with IF's above the RF frequency have become very common in broadband applications, and those are still called superhets, not subhets :-). Google turns up a couple hits on subheterodyne but other than one that might mean "IF higher in frequency than RF" I don't recognize what they mean.. I suspect that "Super" was more a marketing term than anything else :-). Tim N3QE Supersonic. http://en.wikipedia.org/wiki/Superheterodyne_receiver I saw that in Wikipedia too. I didn't believe it, it doesn't make sense. Why not just call all radio frequencies and IF frequencies above 20kHz "supersonic"? Then all radios (*) are supersonic, and we're back to super meaning nothing at all. (*) OK, I know about lowfers and there is submarine RF communication below 20kHz. If I listen in to that with a superhet is it then really a subhet? Reminds me of a Simpsons episode where Bart and Homer are arguing about something, and Bart parrots what Wikipedia says on the subject. Homer says in a deep resentful voice "We'll fix THAT when we get home!" Tim. |
If Superheterodyne, why not Subheterodyne?
Tim Shoppa wrote:
A terminology question I suppose about the derivation of the term "Superheterodyne" more than anything else: Does the "Super" actually mean anything? Is there a Subheterodyne? Traditionally superhets mix a higher radio frequency down to a lower IF frequency, but certainly in the past few decades radios with IF's above the RF frequency have become very common in broadband applications, and those are still called superhets, not subhets :-). Google turns up a couple hits on subheterodyne but other than one that might mean "IF higher in frequency than RF" I don't recognize what they mean.. I suspect that "Super" was more a marketing term than anything else :-). If you want to file a new patent for old stuff you could try subheterodyne and it just might sail through :-) Oh wait, call it hyperheterodyne, has more glitz. Just like the supermercados in Spain. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM. |
If Superheterodyne, why not Subheterodyne?
On Mon, 20 Apr 2009 12:23:53 -0700 (PDT), Tim Shoppa
wrote: On Apr 20, 1:10*pm, John Larkin wrote: On Mon, 20 Apr 2009 09:50:05 -0700 (PDT), Tim Shoppa wrote: A terminology question I suppose about the derivation of the term "Superheterodyne" more than anything else: Does the "Super" actually mean anything? Is there a Subheterodyne? Traditionally superhets mix a higher radio frequency down to a lower IF frequency, but certainly in the past few decades radios with IF's above the RF frequency have become very common in broadband applications, and those are still called superhets, not subhets :-). Google turns up a couple hits on subheterodyne but other than one that might mean "IF higher in frequency than RF" I don't recognize what they mean.. I suspect that "Super" was more a marketing term than anything else :-). Tim N3QE Supersonic. http://en.wikipedia.org/wiki/Superheterodyne_receiver I saw that in Wikipedia too. I didn't believe it, it doesn't make sense. Why not just call all radio frequencies and IF frequencies above 20kHz "supersonic"? Then all radios (*) are supersonic, and we're back to super meaning nothing at all. Possibly because heterodyne receivers mixed to sonic frequencies. John |
If Superheterodyne, why not Subheterodyne?
On Mon, 20 Apr 2009 12:36:12 -0700, Joerg
wrote: Tim Shoppa wrote: A terminology question I suppose about the derivation of the term "Superheterodyne" more than anything else: Does the "Super" actually mean anything? Is there a Subheterodyne? Traditionally superhets mix a higher radio frequency down to a lower IF frequency, but certainly in the past few decades radios with IF's above the RF frequency have become very common in broadband applications, and those are still called superhets, not subhets :-). Google turns up a couple hits on subheterodyne but other than one that might mean "IF higher in frequency than RF" I don't recognize what they mean.. I suspect that "Super" was more a marketing term than anything else :-). If you want to file a new patent for old stuff you could try subheterodyne and it just might sail through :-) Oh wait, call it hyperheterodyne, has more glitz. Just like the supermercados in Spain. I think we're going to be doing a superhet receiver soon. Maybe we'll do it in an FPGA! John |
If Superheterodyne, why not Subheterodyne?
Tim Shoppa wrote:
A terminology question I suppose about the derivation of the term "Superheterodyne" more than anything else: Does the "Super" actually mean anything? Is there a Subheterodyne? Traditionally superhets mix a higher radio frequency down to a lower IF frequency, but certainly in the past few decades radios with IF's above the RF frequency have become very common in broadband applications, and those are still called superhets, not subhets :-). Google turns up a couple hits on subheterodyne but other than one that might mean "IF higher in frequency than RF" I don't recognize what they mean.. ====================== Many of not most modern HF receivers have a first IF in the 45-75 MHz range. ================================================== I suspect that "Super" was more a marketing term than anything else :-). Tim N3QE frank GM0CSZ / KN6WH |
If Superheterodyne, why not Subheterodyne?
John Larkin wrote:
On Mon, 20 Apr 2009 12:36:12 -0700, Joerg wrote: Tim Shoppa wrote: A terminology question I suppose about the derivation of the term "Superheterodyne" more than anything else: Does the "Super" actually mean anything? Is there a Subheterodyne? Traditionally superhets mix a higher radio frequency down to a lower IF frequency, but certainly in the past few decades radios with IF's above the RF frequency have become very common in broadband applications, and those are still called superhets, not subhets :-). Google turns up a couple hits on subheterodyne but other than one that might mean "IF higher in frequency than RF" I don't recognize what they mean.. I suspect that "Super" was more a marketing term than anything else :-). If you want to file a new patent for old stuff you could try subheterodyne and it just might sail through :-) Oh wait, call it hyperheterodyne, has more glitz. Just like the supermercados in Spain. I meant hypermercados :-) I think we're going to be doing a superhet receiver soon. Maybe we'll do it in an FPGA! How'd you do the preamp in there? -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM. |
| All times are GMT +1. The time now is 08:59 PM. |
Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
RadioBanter.com