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Total 25 documents matching your query.

1. [TenTec] Orion Sub Receiver BW (score: 1): Author: "Rick Williams" <rick.williams@telus.net>; Date: Thu, 16 Mar 2006 09:35:59 -0800; Last evening I was playing with HamAlyzer software looking at the audio passband of various QSOs on 75 metres. As expected some were good and some were bad. All were communicating so information was; /archives//html/TenTec/2006-03/msg00780.html (8,025 bytes)
2. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: Sinisa Hristov <shristov@ptt.yu>; Date: Thu, 16 Mar 2006 12:48:40 -0500; I attempted to measure AM RX audio response with 2.056 a few times, and in all ocassions it was 3 kHz on both main and sub RX. RX filters were fully open and RX was fed from a signal generator having; /archives//html/TenTec/2006-03/msg00781.html (7,249 bytes)
3. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: joel hallas <jrhallas@optonline.net>; Date: Thu, 16 Mar 2006 12:59:40 -0500; Am I missing something here? If a DSB AM signal is tuned with the carrier centered in a 6 kHz BW, I would expect to see just 3 kHz of audio BW. If you tune the carrier to one edge, you will be able t; /archives//html/TenTec/2006-03/msg00783.html (8,962 bytes)
4. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: "Ron Castro" <ronc@sonic.net>; Date: Thu, 16 Mar 2006 10:05:06 -0800; My understanding is that in AM, the BW shown is supposed to be the actual recovered audio bandwidth, not the total bandwidth. There is no reason why it should be restricted to any less than 12 kHz si; /archives//html/TenTec/2006-03/msg00785.html (10,176 bytes)
5. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: Sinisa Hristov <shristov@ptt.yu>; Date: Thu, 16 Mar 2006 13:07:08 -0500; With V1 firmware the indicated AM bandwidth was that of the recovered audio. With V2 it is the actual IF bandwidth, limited to 6 kHz and preventing any response above 3 kHz, unlike V1. 73, Sinisa YT; /archives//html/TenTec/2006-03/msg00786.html (8,156 bytes)
6. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Thu, 16 Mar 2006 12:30:44 -0600; I agree with you, it would be nice to have an AM bandwidth limit considerably about 6 Khz total width. Grant/NQ5T _______________________________________________ TenTec mailing list TenTec@contestin; /archives//html/TenTec/2006-03/msg00788.html (8,162 bytes)
7. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Thu, 16 Mar 2006 12:31:52 -0600; I meant to say 'above" not "about". _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec; /archives//html/TenTec/2006-03/msg00789.html (7,594 bytes)
8. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: Barry LaZar <k3ndm@verizon.net>; Date: Thu, 16 Mar 2006 13:32:43 -0600 (CST); Ron, Going to a bandwidth in excess of 10 KHz. really isn't useful. The FCC limits the AM BC'ers to a 10 KHz channel and the CCIR limits are less in the SW bands. Barry K3NDM ________________________; /archives//html/TenTec/2006-03/msg00792.html (11,161 bytes)
9. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: Sinisa Hristov <shristov@ptt.yu>; Date: Thu, 16 Mar 2006 17:21:51 -0500; Of course 10 kHz may be too much, but 8 or 9 kHz BW is actually transmitted, and a 3 kHz V2 audio sounds substantially worse than 4 or 4.5 KHz V1 audio. 73, Sinisa YT1NT, VE3EA ______________________; /archives//html/TenTec/2006-03/msg00804.html (8,517 bytes)
10. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: Sinisa Hristov <shristov@ptt.yu>; Date: Thu, 16 Mar 2006 17:03:33 -0500; AM demodulation is a nonlinear process and AM BW testing using noise input is meaningless. The filter bandwidth cannot be reliably estimated from the resulting audio spectrum measurements because of; /archives//html/TenTec/2006-03/msg00805.html (9,584 bytes)
11. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: joel hallas <jrhallas@optonline.net>; Date: Thu, 16 Mar 2006 17:40:00 -0500; Well, this is all very good info and suggests that the Orion sub-receiver is not really all that useful as a GC SW or BC receiver, if you really want to listen. I've made the case to a few folk in th; /archives//html/TenTec/2006-03/msg00806.html (11,118 bytes)
12. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: "Carl Moreschi" <n4py@arrl.net>; Date: Thu, 16 Mar 2006 18:05:04 -0500; The old radios of the past that were the good ones such as the R390 had mechaincal filters in them. When you used a 4 khz BW filter in AM mode on an R390, your total BW was 4 khz. Your audio passband; /archives//html/TenTec/2006-03/msg00808.html (10,950 bytes)
13. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Thu, 16 Mar 2006 17:12:58 -0600; No one is disputing the mathematics behind one sideband with carrier, and we'd all like to have a full 6Khz or therabouts per sideband. It's all true, and it's mostly totally beside the point. In any; /archives//html/TenTec/2006-03/msg00809.html (9,598 bytes)
14. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: CATFISHTWO@aol.com; Date: Thu, 16 Mar 2006 18:25:29 EST; Bottom line is , how does it sound, not how does it look on the monitor,. Some where we loose sight of the fact this is a radio, primarily designed for the ham bands and SWL and should be good on cw; /archives//html/TenTec/2006-03/msg00811.html (10,623 bytes)
15. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: Kc9cdt@aol.com; Date: Thu, 16 Mar 2006 18:30:09 EST; I also like to listen to AM SW. If I am stuck with 3KC BW, I'm not going to be very happy with that. As far as I'm concerned it's a bug in the code. That's what they said the 20KHZ (and 6) filter was; /archives//html/TenTec/2006-03/msg00813.html (8,285 bytes)
16. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: "Grant Youngman" <nq5t@comcast.net>; Date: Thu, 16 Mar 2006 17:42:13 -0600; (1) The R-390 is not totally an "old radio of the past". The A version was built well into the mid-1980's. I'm 6 years older than my much older than that "old radio of the past". Which makes me an "; /archives//html/TenTec/2006-03/msg00814.html (9,486 bytes)
17. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: "Ron Castro" <ronc@sonic.net>; Date: Thu, 16 Mar 2006 15:58:57 -0800; Well, the transmitted audio on an NRSC-1 compliant AM transmitter is up to 10 kHz, which gives rise to a channel 20 kHz wide in total bandwidth. An NRSC-3 (1990) complaint receiver (I think there was; /archives//html/TenTec/2006-03/msg00816.html (13,914 bytes)
18. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: Sinisa Hristov <shristov@ptt.yu>; Date: Thu, 16 Mar 2006 20:04:45 -0500; In fact, 14 kHz refers to the IF center frequency, and the sampling rate is 56.09375 kHz. 73, Sinisa YT1NT, VE3EA _______________________________________________ TenTec mailing list TenTec@contesting; /archives//html/TenTec/2006-03/msg00823.html (8,843 bytes)
19. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: "Rick Williams" <rick.williams@telus.net>; Date: Thu, 16 Mar 2006 17:31:32 -0800; Based on Sinisa' suggestion I have replotted my AM received signals on both the Main and Sub receiver. As he points out BOTH are limited with 2.056 firmware to +/- 3 kHz. As opposed to sweeping the b; /archives//html/TenTec/2006-03/msg00830.html (8,752 bytes)
20. Re: [TenTec] Orion Sub Receiver BW (score: 1): Author: Lin Davis <linbdavis@earthlink.net>; Date: Thu, 16 Mar 2006 22:47:07 -0500; Interesting! I wonder if Ten-Tec did this to reduce the DSP workload thus increasing overall performance (i.e.. sweep, and user input response). If I understand correctly, if you cut the bandwidth th; /archives//html/TenTec/2006-03/msg00844.html (9,528 bytes)

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