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#41
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DRM -Ain't- IBOC
On Oct 11, 8:16 pm, Telamon
wrote: In article . com, SFTV_troy wrote: David Eduardo wrote: "SFTV_troy" wrote in message There is no technical difference. Both HD radio and DRM operate on the same principles: - 2 separate signals - 1 analog - 1 digital - the digital is simulcast "next to" the original analog signal No, DRM is 100% digital. To run analog simultaneously you need a separate frequency. Some testing is being done, like that in Mexico, by placing the DRM signal on the adjacent AM channel... a station on 1060 is going to have DRM on 1070. And I repeat: HD radio works the same way. The digital signal sits *next to* the station at 1070. If you took a buss how many people would sit down next to you? The owner of the store selling the fuses. If they are littelfuses, he might get away with it. |
#42
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
On Oct 11, 8:44 pm, Steven wrote:
On Oct 11, 8:16 pm, Telamon wrote: In article . com, SFTV_troy wrote: David Eduardo wrote: "SFTV_troy" wrote in message There is no technical difference. Both HD radio and DRM operate on the same principles: - 2 separate signals - 1 analog - 1 digital - the digital is simulcast "next to" the original analog signal No, DRM is 100% digital. To run analog simultaneously you need a separate frequency. Some testing is being done, like that in Mexico, by placing the DRM signal on the adjacent AM channel... a station on 1060 is going to have DRM on 1070. And I repeat: HD radio works the same way. The digital signal sits *next to* the station at 1070. If you took a buss how many people would sit down next to you? The owner of the store selling the fuses. If they are littelfuses, he might get away with it. AH! STEREO FUSES! |
#43
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
On Oct 11, 11:53 am, RHF wrote:
On Oct 11, 5:48 am, SFTV_troy wrote: RHF wrote: On Oct 9, 10:13 am, SFTV_troy wrote: Hein ten Horn wrote: wrote: Okay. By that reasoning, because HD Radio sits "next to" the AM signal, then it is not IBOC either. It is a simulcast format. Do you agree with that statement? As a whole? No. - There is no technical difference. - Both HD radio and DRM operate on the same principles: - 2 separate signals - 1 analog - 1 digital - the digital is simulcast "next to" the original analog signal iBquity's IBOC Broadcast System is 'Intrinsic' DRM's Simulcast Broadcast Scheme is NOT 'Intrinsic' - That distinction is more about FAITH, than reality. - There's no real difference between DRM's version - (sitting next-to the AM signal) and HD's version - (also sitting next-to the AM signal). - SFTV, - - BLATANTLY TECNICALLY WRONG ! - ARE YOU SURE YOU ARE AN "EE" ? - - us lesser beings would like proof ~ RHF - . SFTV, IBOC AM/MW "HD" Radio - Hybrid Mode http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif - Lower Digital Sidebands {Co-SideBand} * Analog Host Signal (Mono) {Nested} + Upper Digital Sidebands {Co-SideBand} -Note- The IBOC Signa supports the current AM Mono Signal as well as the Digital {IBOC} Signal. Provides for 40kbps Data Rate, for Full Stereo plus a Low Speed Data Path. Audio 36kbps, Song Title and Artist 4kbps . http://www.rthk.org.hk/about/digital...#slide0143.htm |
#44
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
On Oct 11, 11:51 am, RHF wrote:
On Oct 11, 5:43 am, SFTV_troy wrote: David Eduardo wrote: "SFTV_troy" wrote in message There is no technical difference. Both HD radio and DRM operate on the same principles: - 2 separate signals - 1 analog - 1 digital - the digital is simulcast "next to" the original analog signal No, DRM is 100% digital. To run analog simultaneously you need a separate frequency. Some testing is being done, like that in Mexico, by placing the DRM signal on the adjacent AM channel... a station on 1060 is going to have DRM on 1070. And I repeat: - HD radio works the same way. - The digital signal sits *next to* the station at 1070. - SFTV, - - BLATANTLY TECNICALLY WRONG ARE YOU SURE YOU ARE AN "EE" ? - - us lesser beings would like proof ~ RHF - . SFTV, iBquity's IBOC Hybrid Mode for AM/MW "HD" Radio http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif - Lower Digital Sidebands {Co-SideBand} 0 Analog Host Signal (Mono) {Nested} + Upper Digital Sidebands {Co-SideBand} * The Three (3) Signals are Combined into 'a' "Single" Unified Broadcasting System. {Intrinsic} -Note- The IBOC Signa supports the current AM Mono Signal as well as the Digital {IBOC} Signal. Provides for 40kbps Data Rate, for Full Stereo plus a Low Speed Data Path. Audio 36kbps, Song Title and Artist 4kbps . |
#45
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
RHF wrote:
On Oct 11, 5:48 am, SFTV_troy - There's no real difference between DRM's version - (sitting next-to the AM signal) and HD's version - (also sitting next-to the AM signal). IBOC AM/MW "HD" Radio - Hybrid Mode http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif - Lower Digital Sidebands {Co-SideBand} * Analog Host Signal (Mono) {Nested} + Upper Digital Sidebands {Co-SideBand} Thanks for proving my point. HD sits *next to* the AM signal (+/- 10 kHz). Same as DRM sits *next to* the AM signal (+ or - 10 kHz). |
#46
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
RHF wrote:
On Oct 11, 5:48 am, SFTV_troy - There's no real difference between DRM's version - (sitting next-to the AM signal) and HD's version - (also sitting next-to the AM signal). IBOC AM/MW "HD" Radio - Hybrid Mode http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif - Lower Digital Sidebands {Co-SideBand} * Analog Host Signal (Mono) {Nested} + Upper Digital Sidebands {Co-SideBand} Thanks for proving my point. HD sits *next to* the AM signal (+/- 10 kHz). Same as DRM sits *next to* the AM signal (+ or - 10 kHz). |
#47
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
On Oct 12, 8:52 am, SFTV_troy wrote:
RHF wrote: On Oct 11, 5:48 am, SFTV_troy - There's no real difference between DRM's version - (sitting next-to the AM signal) and HD's version - (also sitting next-to the AM signal). IBOC AM/MW "HD" Radio - Hybrid Mode http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif - Lower Digital Sidebands {Co-SideBand} * Analog Host Signal (Mono) {Nested} + Upper Digital Sidebands {Co-SideBand} - Thanks for proving my point. HD sits *next to* the AM signal (+/- 10 - kHz). Same as DRM sits *next to* the AM signal (+ or - 10 kHz). SFTV - There you go again being Factually Wrong -and- Clearly Misstating the Technical Specifications. DRM = Simulcast without Specification {Sans-Mask} x x x Does Not Equal x x x IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands http://electronicdesign.com/Files/29.../Figure_02.gif SFTV - It is now becoming very obvious to all : That you got your claimed 'ee' degree; straight-out of a Box of Cracker-Jacks. i b oc'd ~ RHF |
#48
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
On Oct 12, 8:52 am, SFTV_troy wrote:
RHF wrote: On Oct 11, 5:48 am, SFTV_troy - There's no real difference between DRM's version - (sitting next-to the AM signal) and HD's version - (also sitting next-to the AM signal). IBOC AM/MW "HD" Radio - Hybrid Mode http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif - Lower Digital Sidebands {Co-SideBand} * Analog Host Signal (Mono) {Nested} + Upper Digital Sidebands {Co-SideBand} - Thanks for proving my point. HD sits *next to* the AM signal (+/- 10 - kHz). Same as DRM sits *next to* the AM signal (+ or - 10 kHz). SFTV - There you go again being Factually Wrong -and- Clearly Misstating the Technical Specifications. DRM = Simulcast without Specification {Sans-Mask} x x x Does Not Equal x x x IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands http://electronicdesign.com/Files/29.../Figure_02.gif SFTV - It is now becoming very obvious to all : That you got your claimed 'ee' degree; straight-out of a Box of Cracker-Jacks. i b oc'd ~ RHF |
#49
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
RHF wrote: On Oct 12, 8:52 am, SFTV_troy wrote: RHF wrote: On Oct 11, 5:48 am, SFTV_troy - There's no real difference between DRM's version - (sitting next-to the AM signal) and HD's version - (also sitting next-to the AM signal). IBOC AM/MW "HD" Radio - Hybrid Mode http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif - Lower Digital Sidebands {Co-SideBand} * Analog Host Signal (Mono) {Nested} + Upper Digital Sidebands {Co-SideBand} - Thanks for proving my point. HD sits *next to* the AM signal (+/- - 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz). DRM = Simulcast without Specification {Sans-Mask} x x x Does Not Equal x x x IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands I still don't see the difference. Both standards are using sidebands, adjacent to the analog AM signal. |
#50
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
RHF wrote: On Oct 12, 8:52 am, SFTV_troy wrote: RHF wrote: On Oct 11, 5:48 am, SFTV_troy - There's no real difference between DRM's version - (sitting next-to the AM signal) and HD's version - (also sitting next-to the AM signal). IBOC AM/MW "HD" Radio - Hybrid Mode http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif - Lower Digital Sidebands {Co-SideBand} * Analog Host Signal (Mono) {Nested} + Upper Digital Sidebands {Co-SideBand} - Thanks for proving my point. HD sits *next to* the AM signal (+/- - 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz). DRM = Simulcast without Specification {Sans-Mask} x x x Does Not Equal x x x IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands I still don't see the difference. Both standards are using sidebands, adjacent to the analog AM signal. |
#51
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
"SFTV_troy" wrote in message ps.com... RHF wrote: On Oct 12, 8:52 am, SFTV_troy wrote: RHF wrote: On Oct 11, 5:48 am, SFTV_troy - There's no real difference between DRM's version - (sitting next-to the AM signal) and HD's version - (also sitting next-to the AM signal). IBOC AM/MW "HD" Radio - Hybrid Mode http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif - Lower Digital Sidebands {Co-SideBand} * Analog Host Signal (Mono) {Nested} + Upper Digital Sidebands {Co-SideBand} - Thanks for proving my point. HD sits *next to* the AM signal (+/- - 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz). DRM = Simulcast without Specification {Sans-Mask} x x x Does Not Equal x x x IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands I still don't see the difference. Both standards are using sidebands, adjacent to the analog AM signal. DRM is not using a sideband; to do analog and digital requires a separate transmitter for each on a separate carrier frequency. HD is a combined analog and digital signal on the same carrier frequency. DRM is digital only... if you want analog, you have to have a separate channel, close to or not to the DRM one. |
#52
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
On Sat, 13 Oct 2007 10:05:11 -0700, "David Eduardo"
wrote: "SFTV_troy" wrote in message ups.com... RHF wrote: On Oct 12, 8:52 am, SFTV_troy wrote: RHF wrote: On Oct 11, 5:48 am, SFTV_troy - There's no real difference between DRM's version - (sitting next-to the AM signal) and HD's version - (also sitting next-to the AM signal). IBOC AM/MW "HD" Radio - Hybrid Mode http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif - Lower Digital Sidebands {Co-SideBand} * Analog Host Signal (Mono) {Nested} + Upper Digital Sidebands {Co-SideBand} - Thanks for proving my point. HD sits *next to* the AM signal (+/- - 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz). DRM = Simulcast without Specification {Sans-Mask} x x x Does Not Equal x x x IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands I still don't see the difference. Both standards are using sidebands, adjacent to the analog AM signal. DRM is not using a sideband; to do analog and digital requires a separate transmitter for each on a separate carrier frequency. HD is a combined analog and digital signal on the same carrier frequency. DRM is digital only... if you want analog, you have to have a separate channel, close to or not to the DRM one. Exactly. DRM is a separate signal that can go wherever the operator chooses. He may elect to place it next to his AM transmitter or the regulator may force him to place it there so any interference will be to his own service. Whatever, the signal will appear at only one point in the spectrum. It is not a sideband of the AM. HD, on the other hand is an actual sideband of the AM carrier. There are two digital channels available, the primary and the secondary. Each of them occupies 5kHz either side of the AM carrier, the primary from 10 to 15kHz, and the secondary from 5 to 10kHz. The HD signal is irrevocably combined with its host AM service. d -- Pearce Consulting http://www.pearce.uk.com |
#53
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
David Eduardo wrote: "SFTV_troy" wrote in message ps.com... RHF wrote: On Oct 12, 8:52 am, SFTV_troy wrote: RHF wrote: On Oct 11, 5:48 am, SFTV_troy - There's no real difference between DRM's version - (sitting next-to the AM signal) and HD's version - (also sitting next-to the AM signal). IBOC AM/MW "HD" Radio - Hybrid Mode http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif - Lower Digital Sidebands {Co-SideBand} * Analog Host Signal (Mono) {Nested} + Upper Digital Sidebands {Co-SideBand} - Thanks for proving my point. HD sits *next to* the AM signal (+/- - 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz). DRM = Simulcast without Specification {Sans-Mask} x x x Does Not Equal x x x IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands I still don't see the difference. Both standards are using sidebands, adjacent to the analog AM signal. DRM is not using a sideband; to do analog and digital requires a separate transmitter for each on a separate carrier frequency. HD is a combined analog and digital signal on the same carrier frequency. DRM is digital only... if you want analog, you have to have a separate channel, close to or not to the DRM one. Both = QRM dxAce Michigan USA |
#54
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
In article om,
SFTV_troy wrote: RHF wrote: On Oct 12, 8:52 am, SFTV_troy wrote: RHF wrote: On Oct 11, 5:48 am, SFTV_troy - There's no real difference between DRM's version - (sitting next-to the AM signal) and HD's version - (also sitting next-to the AM signal). IBOC AM/MW "HD" Radio - Hybrid Mode http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif - Lower Digital Sidebands {Co-SideBand} * Analog Host Signal (Mono) {Nested} + Upper Digital Sidebands {Co-SideBand} - Thanks for proving my point. HD sits *next to* the AM signal (+/- - 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz). DRM = Simulcast without Specification {Sans-Mask} x x x Does Not Equal x x x IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands I still don't see the difference. Both standards are using sidebands, adjacent to the analog AM signal. Ok, here is a difference you should understand. DRM uses two separate transmitters and antennas one digital and one analog. HD uses two different exciters one digital and the other analog that input into the same transmitter and antenna at the same time. -- Telamon Ventura, California |
#55
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
On Oct 13, 9:13 am, SFTV_troy wrote:
RHF wrote: On Oct 12, 8:52 am, SFTV_troy wrote: RHF wrote: On Oct 11, 5:48 am, SFTV_troy - There's no real difference between DRM's version - (sitting next-to the AM signal) and HD's version - (also sitting next-to the AM signal). IBOC AM/MW "HD" Radio - Hybrid Mode http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif - Lower Digital Sidebands {Co-SideBand} * Analog Host Signal (Mono) {Nested} + Upper Digital Sidebands {Co-SideBand} - Thanks for proving my point. HD sits *next to* the AM signal (+/- - 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz). DRM = Simulcast without Specification {Sans-Mask} x x x Does Not Equal x x x IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands I still don't see the difference. Both standards are using sidebands, adjacent to the analog AM signal.- Hide quoted text - - Show quoted text - SFTV - There you go again one more time being Factually Wrong -and- Clearly Misstating the Technical Specifications. DRM = Simulcast without Specification {Sans-Mask} -Note- That is Two 'separate' Signals -NOT- Sidebands x x x Does Not Equal x x x IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands http://electronicdesign.com/Files/29.../Figure_02.gif i b oc'd ~ RHF |
#56
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
On Oct 13, 9:13 am, SFTV_troy wrote:
RHF wrote: On Oct 12, 8:52 am, SFTV_troy wrote: RHF wrote: On Oct 11, 5:48 am, SFTV_troy - There's no real difference between DRM's version - (sitting next-to the AM signal) and HD's version - (also sitting next-to the AM signal). IBOC AM/MW "HD" Radio - Hybrid Mode http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif - Lower Digital Sidebands {Co-SideBand} * Analog Host Signal (Mono) {Nested} + Upper Digital Sidebands {Co-SideBand} - Thanks for proving my point. HD sits *next to* the AM signal (+/- - 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz). DRM = Simulcast without Specification {Sans-Mask} x x x Does Not Equal x x x IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands = I still don't see the difference. Both standards are using sidebands, = adjacent to the analog AM signal. SFTV - There you go again one more time being Factually Wrong -and- Clearly Misstating the Technical Specifications. DRM = Simulcast without Specification {Sans-Mask} -Note- That is Two 'separate' Signals -NOT- Sidebands x x x Does Not Equal x x x IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands http://electronicdesign.com/Files/29.../Figure_02.gif i b oc'd ~ RHF |
#57
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
Don Pearce wrote: On Sat, 13 Oct 2007 10:05:11 -0700, "David Eduardo" "SFTV_troy" I still don't see the difference. Both standards are using sidebands, adjacent to the analog AM signal. DRM is not using a sideband; to do analog and digital requires a separate transmitter for each on a separate carrier frequency. HD is a combined analog and digital signal on the same carrier frequency. DRM is digital only... if you want analog, you have to have a separate channel, close to or not to the DRM one. Exactly. DRM is a separate signal that can go wherever the operator chooses. ..... It is not a sideband of the AM. HD, on the other hand is an actual sideband of the AM carrier. I see your point, but that seems a trivial difference. Especially since HD also uses a separate signal (exciter), separate from the analog signal. "As with AM, FM stations may use separate exciters to modulate the very different signals." - wikipedia. Sounds like simulcast of two signals. Not just one. |
#58
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
On Oct 13, 2:50 pm, Telamon
wrote: Ok, here is a difference you should understand. DRM uses two separate transmitters and antennas one digital and one analog. HD uses two different exciters one digital and the other analog that input into the same transmitter and antenna at the same time. Why does DRM have to use two separate antennas? Why can't DRM use a combiner and output both signals through a single antenna? |
#59
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
On Mon, 15 Oct 2007 07:20:19 -0700, SFTV_troy
wrote: Don Pearce wrote: On Sat, 13 Oct 2007 10:05:11 -0700, "David Eduardo" "SFTV_troy" I still don't see the difference. Both standards are using sidebands, adjacent to the analog AM signal. DRM is not using a sideband; to do analog and digital requires a separate transmitter for each on a separate carrier frequency. HD is a combined analog and digital signal on the same carrier frequency. DRM is digital only... if you want analog, you have to have a separate channel, close to or not to the DRM one. Exactly. DRM is a separate signal that can go wherever the operator chooses. ..... It is not a sideband of the AM. HD, on the other hand is an actual sideband of the AM carrier. I see your point, but that seems a trivial difference. Especially since HD also uses a separate signal (exciter), separate from the analog signal. "As with AM, FM stations may use separate exciters to modulate the very different signals." - wikipedia. Sounds like simulcast of two signals. Not just one. An exciter is simply a source of a signal which can be modulated onto a carrier. If you want an analogy, HD is a little like the stereo subcarrier on an FM signal - not the same as the baseband signal, but an integral part of the overall signal. DRM would be like transmitting the stereo signal on another channel entirely, with its own transmitter. The difference is far from trivial. d -- Pearce Consulting http://www.pearce.uk.com |
#60
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
"SFTV_troy" wrote in message ups.com... Don Pearce wrote: On Sat, 13 Oct 2007 10:05:11 -0700, "David Eduardo" "SFTV_troy" I still don't see the difference. Both standards are using sidebands, adjacent to the analog AM signal. DRM is not using a sideband; to do analog and digital requires a separate transmitter for each on a separate carrier frequency. HD is a combined analog and digital signal on the same carrier frequency. DRM is digital only... if you want analog, you have to have a separate channel, close to or not to the DRM one. Exactly. DRM is a separate signal that can go wherever the operator chooses. ..... It is not a sideband of the AM. HD, on the other hand is an actual sideband of the AM carrier. I see your point, but that seems a trivial difference. Especially since HD also uses a separate signal (exciter), separate from the analog signal. "As with AM, FM stations may use separate exciters to modulate the very different signals." - wikipedia. On the same carrier for HD, on separate carriers for DRM. DRM is a pure digital system, and if analog is also employed, it is on a separate allocation, close or not so close to the digital frequency. |
#61
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
"SFTV_troy" wrote in message oups.com... On Oct 13, 2:50 pm, Telamon wrote: Ok, here is a difference you should understand. DRM uses two separate transmitters and antennas one digital and one analog. HD uses two different exciters one digital and the other analog that input into the same transmitter and antenna at the same time. Why does DRM have to use two separate antennas? Why can't DRM use a combiner and output both signals through a single antenna? Because the carrier frequencies are different... and because there is no analog component to DRM... to do analog requires a separate station, license, frequency. |
#62
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
"SFTV_troy" wrote in message ups.com... Don Pearce wrote: On Sat, 13 Oct 2007 10:05:11 -0700, "David Eduardo" "SFTV_troy" I still don't see the difference. Both standards are using sidebands, adjacent to the analog AM signal. DRM is not using a sideband; to do analog and digital requires a separate transmitter for each on a separate carrier frequency. HD is a combined analog and digital signal on the same carrier frequency. DRM is digital only... if you want analog, you have to have a separate channel, close to or not to the DRM one. Exactly. DRM is a separate signal that can go wherever the operator chooses. ..... It is not a sideband of the AM. HD, on the other hand is an actual sideband of the AM carrier. I see your point, but that seems a trivial difference. Especially since HD also uses a separate signal (exciter), separate from the analog signal. "As with AM, FM stations may use separate exciters to modulate the very different signals." - wikipedia. Sounds like simulcast of two signals. Not just one. |
#63
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
"SFTV_troy" wrote in message ups.com... I see your point, but that seems a trivial difference. Especially since HD also uses a separate signal (exciter), separate from the analog signal. "As with AM, FM stations may use separate exciters to modulate the very different signals." - wikipedia. Sounds like simulcast of two signals. Not just one. IBOC was engineered from the get-go with compatible recievers in mind. The receivers would autoswitch from the analog to the digital signal. Was DRM engineered with such autoswitching receivers in mind? Are any such autoswitching receivers currently available? Frank Dresser |
#64
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
David Frackelton Gleason, still posing as the fraudulent 'Eduardo', wrote: "SFTV_troy" wrote in message oups.com... On Oct 13, 2:50 pm, Telamon wrote: Ok, here is a difference you should understand. DRM uses two separate transmitters and antennas one digital and one analog. HD uses two different exciters one digital and the other analog that input into the same transmitter and antenna at the same time. Why does DRM have to use two separate antennas? Why can't DRM use a combiner and output both signals through a single antenna? Because the carrier frequencies are different... and because there is no analog component to DRM... to do analog requires a separate station, license, frequency. License? Apparently you didn't need one for amateur radio in Ecuador, Edweenie! |
#65
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
In article .com,
SFTV_troy wrote: On Oct 13, 2:50 pm, Telamon wrote: Ok, here is a difference you should understand. DRM uses two separate transmitters and antennas one digital and one analog. HD uses two different exciters one digital and the other analog that input into the same transmitter and antenna at the same time. Why does DRM have to use two separate antennas? Why can't DRM use a combiner and output both signals through a single antenna? Because it's different. Try to process that. -- Telamon Ventura, California |
#66
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
Frank Dresser wrote:
IBOC was engineered from the get-go with compatible recievers in mind. The receivers would autoswitch from the analog to the digital signal. Was DRM engineered with such autoswitching receivers in mind? Obviously a DRM receiver can handle both analogue and digital signals. Once a DRM signal is received, all parallel frequencies of the service are automatically stored in the receiver's memory. If the signal becomes weak the receiver will automatically switch to a better signal (if available), even in other bands. With a small amount of digital information added to an existing analogue AM broadcast (AMSS, AM Signalling System) the receiver recognizes the alternative frequency information and schedules for other DRM, DAB, AM and FM transmissions carrying the same or related programme material. When you tune in to an analoque AM transmission on 630 kHz in the medium wave band the receiver could let you listening to for instance a DRM broadcast on 9740 kHz on short wave. Are any such autoswitching receivers currently available? Himalaya DRM2009 http://www.himalaya.com.hk/index.php... d=28&lang=en Morphy Richards DRM Radio http://www.morphyrichards.co.uk/inde...SR03&ORLID=ENG Both receivers are equipped with the modern RadioScape RS500 module. gr, Hein |
#67
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
"Hein ten Horn" wrote in message ... Frank Dresser wrote: IBOC was engineered from the get-go with compatible recievers in mind. The receivers would autoswitch from the analog to the digital signal. Was DRM engineered with such autoswitching receivers in mind? Obviously a DRM receiver can handle both analogue and digital signals. Once a DRM signal is received, all parallel frequencies of the service are automatically stored in the receiver's memory. If the signal becomes weak the receiver will automatically switch to a better signal (if available), even in other bands. With a small amount of digital information added to an existing analogue AM broadcast (AMSS, AM Signalling System) the receiver recognizes the alternative frequency information and schedules for other DRM, DAB, AM and FM transmissions carrying the same or related programme material. When you tune in to an analoque AM transmission on 630 kHz in the medium wave band the receiver could let you listening to for instance a DRM broadcast on 9740 kHz on short wave. That's interesting, and I can imagine that approach working well. There would be no need for the adjacent channel digital interference which is designed into IBOC. So it looks like DRM can be better than IBOC. Are any such autoswitching receivers currently available? Himalaya DRM2009 http://www.himalaya.com.hk/index.php... d=28&lang=en Morphy Richards DRM Radio http://www.morphyrichards.co.uk/inde...SR03&ORLID=ENG Both receivers are equipped with the modern RadioScape RS500 module. gr, Hein Thanks for the info! Frank Dresser |
#68
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
On Oct 13, 12:13 pm, SFTV_troy wrote:
RHF wrote: On Oct 12, 8:52 am, SFTV_troy wrote: RHF wrote: On Oct 11, 5:48 am, SFTV_troy - There's no real difference between DRM's version - (sitting next-to the AM signal) and HD's version - (also sitting next-to the AM signal). IBOC AM/MW "HD" Radio - Hybrid Mode http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif - Lower Digital Sidebands {Co-SideBand} * Analog Host Signal (Mono) {Nested} + Upper Digital Sidebands {Co-SideBand} - Thanks for proving my point. HD sits *next to* the AM signal (+/- - 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz). DRM = Simulcast without Specification {Sans-Mask} x x x Does Not Equal x x x IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands I still don't see the difference. Both standards are using sidebands, adjacent to the analog AM signal.- Hide quoted text - - Show quoted text - Hey - you homo butt-****er! You disgust me, gay boy! |
#69
Posted to rec.audio.tech,rec.audio.car,rec.radio.shortwave,ba.broadcast
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DRM -Ain't- IBOC
On Oct 18, 7:52 am, IBOCcrock wrote:
On Oct 13, 12:13 pm, SFTV_troy wrote: RHF wrote: On Oct 12, 8:52 am, SFTV_troy wrote: RHF wrote: On Oct 11, 5:48 am, SFTV_troy - There's no real difference between DRM's version - (sitting next-to the AM signal) and HD's version - (also sitting next-to the AM signal). IBOC AM/MW "HD" Radio - Hybrid Mode http://www.dallas.net/~jvpoll/rfi/AM...BOC_Mask10.gif - Lower Digital Sidebands {Co-SideBand} * Analog Host Signal (Mono) {Nested} + Upper Digital Sidebands {Co-SideBand} - Thanks for proving my point. HD sits *next to* the AM signal (+/- - 10 kHz). Same as DRM sits *next to* the AM signal (+/- 10 kHz). DRM = Simulcast without Specification {Sans-Mask} x x x Does Not Equal x x x IBOC = Intrinsic {Mask} : Nested Analog + Two Digital Co-Sidebands - - I still don't see the difference. - - Both standards are using sidebands, - - adjacent to the analog AM signal. - Hey - you homo butt-****er! - You disgust me, gay boy! IBOC Crock, You sure do read a lot of weirdness into other people's on-topic posts. please do not post your 'closet' sexual fantasies to this shortwave radio listener's newsgroup ~ RHF |
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