[digitalradio] Re: Any THROB Activity These Days?
Andy K3UK I have been contacted by two hams in the UK and I made the following proposal to them: I propose trying both 40m and 20m starting around 1700 UTC on 40m on Thursday and/or Friday and or Saturday on or near 14077 Mhz. I'll call you directly on the hour for about 5-10 minutes on the hour. I'll call CQ after that to see if I get any closer contacts. Around 1900 UTC I'll switch to 20m and call for 5-10 minutes on the hour to see if I can raise you. I suggest that you and I try a contact from 15-25 minutes past the hour in the same pattern. I'll try for some time and then call CQ until the cycle starts again. What do you think? John VE7AXU
[digitalradio] 40m Throb Frequency
What frequency should I use for THROB in 40m? VE7AXU (John)
Re: [digitalradio] Packet Controller Wanted (Tiny-2 or the likes)
Hi Kevin, I have a Tiny2 tucked away in a box in garage that i no longer use. What sort of money are you looking at ? as I would be open to a resonable offer. I have a mic cable and serial computer cable as well for it 73's Ken Zl4KD - Original Message - From: Gmail - Kevin, Natalia, Stacey Rochelle To: digitalradio@yahoogroups.com Sent: Saturday, December 27, 2008 7:29 PM Subject: [digitalradio] Packet Controller Wanted (Tiny-2 or the likes) G'Day All, To any NZ operators on this forum, does anyone have a packet controller they are wishing to part with at a reasonable price. I have been watching Trade-Me but nothing has come up. I require it at a remote station for control, the unit will allow me to change settings without having to wonder up a hill, plus the travel costs. If anyone outside NZ is able to help please feel welcome to contact me directly. I will be honest, I am looking for something very cheap. Regards and Happy New Year. Kevin, ZL1KFM. Get Skype and call me for free. sparc_nz Description: Binary data
[digitalradio] Specification of Frequency for Net Announcement
Our ARES group is having difficulty specifying an operating frequency for a PSK31 net. Is there any website which explains the relationship between the actual signal frequency, the transceiver frequency, the audio (waterfall) frequency, USB and LSB for digital operation? In my net announcement to our group (via email), I simply specified a net frequency of 3581 kHz. However, there seems to be some confusion among us, even among the experienced operators, what that means. It seemed obvious to me at the time what I meant, but I've been clueless before... -- Kent VE4KEH Each time you reboot a Linux system a little kitten is killed... - shamelessly copied from another poster on one of these groups.
RE: [digitalradio] Specification of Frequency for Net Announcement
This is an often encountered problem. What frequency is my signal when I am using [insert mode here]? is the subject of at least one license exam question in US Amateur Radio tests. In the US, government agencies and the military specify frequency by the center of emission. For example, in military 3581 would for LSB voice (nominally of 3 KHz BW) require a carrier (dial) setting) of 3582.5 KHz. Digital modes, especially sound card modes,should be addressed in a similar manner, and with some of care. A dial setting of 3580 KHz, with operation in USB mode, would require a waterfall operating frequency of 1,000 Hz. There are reasons to use a lower carrier frequency and a higher waterfall; 3588 and a 2,000 Hz waterfall choice would reduce any radiation of harmonics of the audio input. Overdriving an audio stage does not produce an ALC reading, but it can add significant harmonics to the signal actually transmitted. Keeping audio sent to a rig to the lowest practical level consistent with SNR (where the noise is hum, hiss and the like) we reduce harmonics, but it's worth keeping an eye out for. If you want your net on 3581, you'll need to specify as above; 3580 USB 1 KHz waterfall, or 3589 USB 2 KHz waterfall both produce a PSK signal at 3581 KHz. Regards, Cortland KA5S [Original Message] From: Kent VE4KEH pb232...@mts.net To: digitalradio@yahoogroups.com Date: 12/30/2008 10:29:17 AM Subject: [digitalradio] Specification of Frequency for Net Announcement Our ARES group is having difficulty specifying an operating frequency for a PSK31 net. Is there any website which explains the relationship between the actual signal frequency, the transceiver frequency, the audio (waterfall) frequency, USB and LSB for digital operation?
Re: [digitalradio] Specification of Frequency for Net Announcement
3579 ? with USB 2 kHz waterfall ? KE4MZ, Brent Dothan, AL bg...@comcast.net www.wb4zpi.org No trees were destroyed in the sending of this contaminant-free message. However, we do concede a significant number of electrons may have been inconvenienced. - Original Message - From: Cortland Richmond k...@earthlink.net To: digitalradio@yahoogroups.com Sent: Tuesday, December 30, 2008 10:27 AM Subject: RE: [digitalradio] Specification of Frequency for Net Announcement This is an often encountered problem. What frequency is my signal when I am using [insert mode here]? is the subject of at least one license exam question in US Amateur Radio tests. In the US, government agencies and the military specify frequency by the center of emission. For example, in military 3581 would for LSB voice (nominally of 3 KHz BW) require a carrier (dial) setting) of 3582.5 KHz. Digital modes, especially sound card modes,should be addressed in a similar manner, and with some of care. A dial setting of 3580 KHz, with operation in USB mode, would require a waterfall operating frequency of 1,000 Hz. There are reasons to use a lower carrier frequency and a higher waterfall; 3588 and a 2,000 Hz waterfall choice would reduce any radiation of harmonics of the audio input. Overdriving an audio stage does not produce an ALC reading, but it can add significant harmonics to the signal actually transmitted. Keeping audio sent to a rig to the lowest practical level consistent with SNR (where the noise is hum, hiss and the like) we reduce harmonics, but it's worth keeping an eye out for. If you want your net on 3581, you'll need to specify as above; 3580 USB 1 KHz waterfall, or 3589 USB 2 KHz waterfall both produce a PSK signal at 3581 KHz. Regards, Cortland KA5S [Original Message] From: Kent VE4KEH pb232...@mts.net To: digitalradio@yahoogroups.com Date: 12/30/2008 10:29:17 AM Subject: [digitalradio] Specification of Frequency for Net Announcement Our ARES group is having difficulty specifying an operating frequency for a PSK31 net. Is there any website which explains the relationship between the actual signal frequency, the transceiver frequency, the audio (waterfall) frequency, USB and LSB for digital operation? Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/sked Yahoo! Groups Links
Re: [digitalradio] Specification of Frequency for Net Announcement
In addition to the other excellent comments, one of the benefits of having full rig control is that some of the multimode digital programs (DM780, fldigi, etc.) can be set to display the mode operating frequency in the waterfall, instead of the audio offset from the suppressed carrier (dial) frequency. You can tune the main rig frequency so that the sweet spot of your rig falls where you want it. For example, I generally use 1500 Hz audio frequency above the dial frequency since my rig's filters are optimized for centering the passband when in SSB-D (digital) mode. If I select narrower filters, I keep the station centered in my passband without the need for any passband tuning tweaking. If you don't use the actual center frequency of the mode, then it is wise to specify the USB dial frequency and the offset for the given mode. If someone wanted to meet me on 3582 actual frequency, I would tune my dial to 3580.5 so that they are 1500 Hz above the dial frequency which centers our tones at 3582. If the sweet spot was 1000 Hz for another station, they would use 3581 dial frequency. 73, Rick, KV9U Kent VE4KEH wrote: Our ARES group is having difficulty specifying an operating frequency for a PSK31 net. Is there any website which explains the relationship between the actual signal frequency, the transceiver frequency, the audio (waterfall) frequency, USB and LSB for digital operation? In my net announcement to our group (via email), I simply specified a net frequency of 3581 kHz. However, there seems to be some confusion among us, even among the experienced operators, what that means. It seemed obvious to me at the time what I meant, but I've been clueless before... No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.10.1/1869 - Release Date: 12/30/2008 12:06 PM
[digitalradio] Re: What is this signal?
I could not tell what frequency that was on exactly or the time it was , could it have been my mt63 signals ?
[digitalradio] Re: Specification of Frequency for Net Announcement
it real easy just giving the beat freq( like on CW sending out a tone on ur rig to match the other guys signal making the signal warble in sound) within a passband. It is so aggravating to see someone spot a DX station as 14.070 , but where at in the passband? because he is not on 14.070! People should spot activity by the closets beat freq in 100hz increments. if a station beat freq is for example is 14071.46 it should be 14071.5 for ease of using with spot pages. which is saying for example my vfo is set at 14070 and the station is 1460 hz up from vfo setting. All data modes should be in USB , but it should equal out the same if you are in usb or lsb if you give the beat freq. (what actuall freq. the station is at in a passband), ALL i need to do in MixW with CAT control is to upload the station to the spot page and it does it with the neartest beat freq the station is on. Also depends on accuracy of your receiver as well. In other words you can fit many stations with in a passband on psk signals,but you need to indentify where the actual modulation is happening at in a passband. --- In digitalradio@yahoogroups.com, Rick W mrf...@... wrote: In addition to the other excellent comments, one of the benefits of having full rig control is that some of the multimode digital programs (DM780, fldigi, etc.) can be set to display the mode operating frequency in the waterfall, instead of the audio offset from the suppressed carrier (dial) frequency. You can tune the main rig frequency so that the sweet spot of your rig falls where you want it. For example, I generally use 1500 Hz audio frequency above the dial frequency since my rig's filters are optimized for centering the passband when in SSB-D (digital) mode. If I select narrower filters, I keep the station centered in my passband without the need for any passband tuning tweaking. If you don't use the actual center frequency of the mode, then it is wise to specify the USB dial frequency and the offset for the given mode. If someone wanted to meet me on 3582 actual frequency, I would tune my dial to 3580.5 so that they are 1500 Hz above the dial frequency which centers our tones at 3582. If the sweet spot was 1000 Hz for another station, they would use 3581 dial frequency. 73, Rick, KV9U Kent VE4KEH wrote: Our ARES group is having difficulty specifying an operating frequency for a PSK31 net. Is there any website which explains the relationship between the actual signal frequency, the transceiver frequency, the audio (waterfall) frequency, USB and LSB for digital operation? In my net announcement to our group (via email), I simply specified a net frequency of 3581 kHz. However, there seems to be some confusion among us, even among the experienced operators, what that means. It seemed obvious to me at the time what I meant, but I've been clueless before... -- -- No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.10.1/1869 - Release Date: 12/30/2008 12:06 PM
Re: [digitalradio] Specification of Frequency for Net Announcement
Kent VE4KEH wrote: Our ARES group is having difficulty specifying an operating frequency for a PSK31 net. Is there any website which explains the relationship between the actual signal frequency, the transceiver frequency, the audio (waterfall) frequency, USB and LSB for digital operation? In my net announcement to our group (via email), I simply specified a net frequency of 3581 kHz. However, there seems to be some confusion among us, even among the experienced operators, what that means. It seemed obvious to me at the time what I meant, but I've been clueless before... We have the same issue in Indiana with our twice-a-year State RACES exercise. Our upcoming exercise will use, quoting from the announcement 3.580 kHz PSK31, USB, Stream at 800Hz, which isn't correct, but is adequate to get participants on the right frequency. I'll be on the right frequency (3,580.800 kHz), but I'll do it with 3,579.3 kHz USB and the PSK centered on 1500 Hz. Do you specify the frequency in the way that describes it best technically, or the way that will most likely result in operators being able to make it work? My suggestion: do both. It's not all that verbose to state 3581.0 kHz PSK31 (e.g. 3580.0 USB with 1000 Hz tone). Many of the emergency-communications-oriented hams are primarily voice ops. They are probably not even aware that convention for sound-card modes is USB (particularly confusing on 3.5 MHz and 7 MHz where voice is generally LSB). The USB suppressed-carrier-frequency with tone specified will get those less familiar with digital communications on the right frequency (and acquaint them with the USB convention), while the digital ops can just look at the 3581.0 and get on the right frequency with whatever set of parameters they prefer. At least that's my 2 cents worth. 73, Paul / K9PS
Re: [digitalradio] Specification of Frequency for Net Announcement
he should write 3579 not 3589 - Original Message - From: Cortland Richmond To: digitalradio@yahoogroups.com Sent: Tuesday, December 30, 2008 5:27 PM Subject: RE: [digitalradio] Specification of Frequency for Net Announcement This is an often encountered problem. What frequency is my signal when I am using [insert mode here]? is the subject of at least one license exam question in US Amateur Radio tests. In the US, government agencies and the military specify frequency by the center of emission. For example, in military 3581 would for LSB voice (nominally of 3 KHz BW) require a carrier (dial) setting) of 3582.5 KHz. Digital modes, especially sound card modes,should be addressed in a similar manner, and with some of care. A dial setting of 3580 KHz, with operation in USB mode, would require a waterfall operating frequency of 1,000 Hz. There are reasons to use a lower carrier frequency and a higher waterfall; 3588 and a 2,000 Hz waterfall choice would reduce any radiation of harmonics of the audio input. Overdriving an audio stage does not produce an ALC reading, but it can add significant harmonics to the signal actually transmitted. Keeping audio sent to a rig to the lowest practical level consistent with SNR (where the noise is hum, hiss and the like) we reduce harmonics, but it's worth keeping an eye out for. If you want your net on 3581, you'll need to specify as above; 3580 USB 1 KHz waterfall, or 3589 USB 2 KHz waterfall both produce a PSK signal at 3581 KHz. Regards, Cortland KA5S [Original Message] From: Kent VE4KEH pb232...@mts.net To: digitalradio@yahoogroups.com Date: 12/30/2008 10:29:17 AM Subject: [digitalradio] Specification of Frequency for Net Announcement Our ARES group is having difficulty specifying an operating frequency for a PSK31 net. Is there any website which explains the relationship between the actual signal frequency, the transceiver frequency, the audio (waterfall) frequency, USB and LSB for digital operation?
Re: [digitalradio] Specification of Frequency for Net Announcement
signal = dial + af in usb or dial - af in lsb ... quite simple in digimodes mostly usb is used but in psk31 no matte if you use usb or lsb best 73´s de dg9bfc - Original Message - From: Kent VE4KEH To: digitalradio@yahoogroups.com Sent: Tuesday, December 30, 2008 4:28 PM Subject: [digitalradio] Specification of Frequency for Net Announcement Our ARES group is having difficulty specifying an operating frequency for a PSK31 net. Is there any website which explains the relationship between the actual signal frequency, the transceiver frequency, the audio (waterfall) frequency, USB and LSB for digital operation? In my net announcement to our group (via email), I simply specified a net frequency of 3581 kHz. However, there seems to be some confusion among us, even among the experienced operators, what that means. It seemed obvious to me at the time what I meant, but I've been clueless before... -- Kent VE4KEH Each time you reboot a Linux system a little kitten is killed... - shamelessly copied from another poster on one of these groups.
Re: [digitalradio] Re: Specification of Frequency for Net Announcement
At 02:23 PM 12/30/2008, JONATHAN WALLEN wrote in part: All data modes should be in USB. True except for RTTY.
Re: [digitalradio] Re: Specification of Frequency for Net Announcement
Most HF Packet is LSB as well. General statements will often get you into trouble, unless very well researched. 73 DE Charles, N5PVL - Original Message - From: John Becker, WØJAB To: digitalradio@yahoogroups.com Sent: Tuesday, December 30, 2008 6:56 PM Subject: Re: [digitalradio] Re: Specification of Frequency for Net Announcement At 02:23 PM 12/30/2008, JONATHAN WALLEN wrote in part: All data modes should be in USB. True except for RTTY.
Re: [digitalradio] Re: Specification of Frequency for Net Announcement
I use USB for RTTY, and reverse in the terminal program. That keeps mark and space in the right relative places. 73, Jose, CO2JA John Becker, WØJAB wrote: At 02:23 PM 12/30/2008, JONATHAN WALLEN wrote in part: All data modes should be in USB. True except for RTTY. VI Conferencia Internacional de Energía Renovable, Ahorro de Energía y Educación Energética 9 - 12 de Junio 2009, Palacio de las Convenciones ...Por una cultura energética sustentable www.ciercuba.com
Re: [digitalradio] Re: Specification of Frequency for Net Announcement
Due to its baseband coding, it does not matter what sideband you use in packet. It is only relevant to published dial frequencies when tuning some spectrum chunk. I did use USB for many years with the only consequence that dial frequencies were different. Same happens with Pactor or Pactor II. Pactor 3 MUST be USB. Frequencies will be different to published ones for people that use different modem tones (2025/2225, 2000/2200, 1650/1850, etc) even on the same sideband. 73 HNY Jose, CO2JA --- Charles Brabham wrote: Most HF Packet is LSB as well. General statements will often get you into trouble, unless very well researched. 73 DE Charles, N5PVL - Original Message - *From:* John Becker, WØJAB mailto:w0...@big-river.net *To:* digitalradio@yahoogroups.com mailto:digitalradio@yahoogroups.com *Sent:* Tuesday, December 30, 2008 6:56 PM *Subject:* Re: [digitalradio] Re: Specification of Frequency for Net Announcement At 02:23 PM 12/30/2008, JONATHAN WALLEN wrote in part: All data modes should be in USB. True except for RTTY. Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/sked VI Conferencia Internacional de Energía Renovable, Ahorro de Energía y Educación Energética 9 - 12 de Junio 2009, Palacio de las Convenciones ...Por una cultura energética sustentable www.ciercuba.com
