Date   

Re: testing

"Bill McLaughlin" <bmc@...>
 

Hi Rick,

There are a few, listen around 3.586....the station would be within
the auto sub-band until running pactor III at the same center freq as
when using Pactor I/II.

What is heard outside the automatic sub-band on 30 meters is VE2AFQ,
and callers, running Pactor III....have heard others using the that
wide mode there but less constant. Legal for Canadians, but still not
a good practice on a supposedly "narrow" (fill in your definition of
choice) signal only band. Also approved by Waterman; enough said!

73,

Bill N9DSJ
(snip)

--- In NBEMSham@..., Rick <mrfarm@...> wrote:

I would be very surprised if there were any Winlink 2000 stations from
the U.S. that are operating automatic operation with Pactor 3 and
outside of the mandatory automatic sub bands. It may have been someone
outside the U.S. (Canada?) or it could have been keyboard although I
feel that unless you have some kind of major data needs it is not
really
appropriate to use the wide modes. But I feel that way about MT-63 or
any other similar wide bandwidth mode.

The IARU Region 2 band plan is very new and has no teeth other than
other hams letting them know of our disapproval. Is Winlink 2000
agreeing to follow the new band plan? Some parts of it would make
automatic operation impossible for text data operation on 80 meters
since the plan calls for out of sub band use of automatic, above >3600.


Re: testing

Rick <mrfarm@...>
 

I would be very surprised if there were any Winlink 2000 stations from the U.S. that are operating automatic operation with Pactor 3 and outside of the mandatory automatic sub bands. It may have been someone outside the U.S. (Canada?) or it could have been keyboard although I feel that unless you have some kind of major data needs it is not really appropriate to use the wide modes. But I feel that way about MT-63 or any other similar wide bandwidth mode.

The IARU Region 2 band plan is very new and has no teeth other than other hams letting them know of our disapproval. Is Winlink 2000 agreeing to follow the new band plan? Some parts of it would make automatic operation impossible for text data operation on 80 meters since the plan calls for out of sub band use of automatic, above 3600.

The PropNet stations are another one of those borderline legal operations because it really seems that at least some are running automatically which is not legal here in the U.S. At least they ID themselves so if you wanted to submit a complaint you can do so. I have not received any response yet from the FCC on my request for a number of answers to basic unresolved questions for the digital operations. But I think that they have received many, many comments and complaints.

Any modes that require infrastructure I feel are not wise to invest too many resources unless you find that you can afford the expertise to handle many different systems. I suspect that even though we have more choices right now, most of us have to concentrate on one or maybe two different solutions.

A good example might be VHF SSB voice if you can find another operator. It may need to be on vertical polarization since that is what 99% of hams have on 2 meters, some with significant gain, but many with minimal antennas.

We are discovering this very problem tonight as we have a very good repeater here in my area and it went down this week with no repair in sight. Don't even know what is wrong yet and it is planned to be replaced in a few months. But tonight is the club net and we are going to try using simplex on the output frequency. Good emergency practice session you could say. I know that a number of hams will not be able to communicate and my 4 element (now vertically polarized) beam's rotor is stuck again:( Always something. Best to keep is simpler and use omni antennas as much as possible for the base stations at least.

73,

Rick, KV9U


hteller wrote:

The station was a Pactor-3 station. The frequency was 10.137. In the US, Pactor 3 operated automatically is only allowed on 30m from 10.150 to 10.140, so if a Winlink station, that Pactor 3 station was operating illegally. Although possible for keyboard to keyboard operation, and fast image transfer, it does not appear that there is any non-automatic Pactor-3 operations on the bands. Winlink PMBO, VE2AFQ, also operates Pactor-3 just below 14.070. He is Canadian, and not REQUIRED to adhere to FCC regulations, but Canada just signed on to the IARU Region 2 bandplan, which does not allow Pactor 3 outside the US autosubands. Why is he ignoring the IARU bandplan? Why is he allowed access to the Winlink CMS servers if he is not going to adhere to the IARU bandplan?

I have nothing against Pactor 3 stations, as long as they adhere to internationally agreed upon bandplans or FCC regulations and do not increase in bandwidth without first checking for adjacent signals (impossible, of course). Of course, nobody without an SCS modem can tell who the Pactor-3 station was.

In addition, three times, a PropNet station regularly came on top of our NBEMS QSO. It is unreasonable to believe he could not have copied either me or N4UM, but it transmitted anyway, obviously under illegal automatic operation (not listening first) outside of the beacon band. Such activities belong in the auto subbands or beacon bands so everyone else who does check for activity first, because there is a live operator to listen, can also operate in our SHARED bands.

Winlink's network obviously can be very useful for some kinds of emcomm traffic as well as for free email for sailors, but there is no reason for their members not to operate according to the rules everyone else must follow. Winlink could not get their job done with narrowband modes, so there is a place for wider modes that can handle deep QSB fades. NBEMS is still considering all modes, and for HF, will have to use some wider modes, such as MFSK16 or DominoEx, to be able to handle QRN that the faster PSK modes cannot, as we have now discovered.

NBEMS is not a mode, but a *system* of software, suggested bands and antennas, and operating practices, intended to provide "johnny on the spot" emcomm in a distributed way that existing systems cannot do. Using PSK63 as a base mode is best for that because all NBEMS stations will be found in one known place by any station that can help with forwarding. We intend to get the job accomplished by using narrowband modes whenever possible, but the job must get done, and if it takes wider modes to do that, we will have to incorporate them into the NBEMS system, but it is unlikely we will have to go wider than 500 Hz. Throughput is a tradeoff between bandwidth, file size, and robustness. What is not known with current systems, or even NBEMS yet, is the amount of time spent trying just to get a connection. We think our distributed system will eventually provide enough forwarding stations so connection times are very fast. The saving in time can much greater than systems which use wider bandwidth modes, but less forwarding stations (there is only so much space available - phone ops can verify that!). Even during the Winlink MARS test, the commander reported that local connectivity was not possible because of propagation, so it was necessary to connect with a station far away, in Utah. You know what that means - a lot of time was wasted trying to connect locally, which probably more than quadrupled the total time from attempted connection to final message delivery. Under those circumstances, if slower modes, but more available fordwarding stations, were used, the speed of transfer would not be so important compared to the time to get a connection. Once a long distance connection has to be made, it is more susceptible to QSB than a NVIS connection, for instance, again increasing the transfer time by an unreported amount.

NBEMS is in beta, and we are gathering experience to optimize the system. We have not ruled out any modes at this time, except voice-bandwidth digital modes, because we feel the job can be done without going to such extremes. We intend to push using 2m VHF SSB digital to the limit, which is reliably about 100 miles. Past that, propagation is too variable to be dependable. Linked DStar repeater systems can go over 100 miles, as long as the repeaters are up, and have very fast throughput, but when the repeaters are down, all the speed in the world is not going to get the message through as a slower system that still works.

73, Skip KH6TY


Rick wrote:

Skip,

I know you don't particularly care for Pactor 3 stations, but isn't it
completely legal to operate Pactor modes at any point in the band since
the whole band is RTTY/Data?



It is only when you are operating an automatic station here in the U.S.
that it would not be legal. If the Pactor station is outside the U.S.,
then they follow their countries rules, which may allow automatic
operation throughout the bands.

If we are striving to come up with solutions for emergency
communications, we should keep all options on the table including
automatic operation since we can never be sure of having operators
available 24/7/365 on a given mode and band. I agree that we should be
doing this with spectrum conserving modes, if possible, and that is why
PSKmail could even have potential in the U.S. if it was made available
on MS OS as well as Linux OS.

With the tests that I have done, I would have to say the best ARQ sound
card mode is FAE400 and this is confirmed by other digital operators
that I have compared notes with.

Also, having a BBS station that could act as a hub, without Pactor
(sound card modes of some kind) would be helpful. The RFSM software
system has this already, including I just found out, group chat without
ARQ. Here in the U.S. this can not be used below 6 meters and it can not
work into the noise like many of the sound card modes. But on quiet VHF
bands, this might do very well.

We are very fortunate to suddenly have a number of options that were not
available even a year ago.

73,

Rick, KV9U

k



Yahoo! Groups Links







Re: testing

Rick <mrfarm@...>
 

Skip,

I know you don't particularly care for Pactor 3 stations, but isn't it completely legal to operate Pactor modes at any point in the band since the whole band is RTTY/Data?

It is only when you are operating an automatic station here in the U.S. that it would not be legal. If the Pactor station is outside the U.S., then they follow their countries rules, which may allow automatic operation throughout the bands.

If we are striving to come up with solutions for emergency communications, we should keep all options on the table including automatic operation since we can never be sure of having operators available 24/7/365 on a given mode and band. I agree that we should be doing this with spectrum conserving modes, if possible, and that is why PSKmail could even have potential in the U.S. if it was made available on MS OS as well as Linux OS.

With the tests that I have done, I would have to say the best ARQ sound card mode is FAE400 and this is confirmed by other digital operators that I have compared notes with.

Also, having a BBS station that could act as a hub, without Pactor (sound card modes of some kind) would be helpful. The RFSM software system has this already, including I just found out, group chat without ARQ. Here in the U.S. this can not be used below 6 meters and it can not work into the noise like many of the sound card modes. But on quiet VHF bands, this might do very well.

We are very fortunate to suddenly have a number of options that were not available even a year ago.

73,

Rick, KV9U


kh6ty wrote:

Roger - I could use more power also. I just finished installing a new 30m antenna when I heard your signal from the other room. I think it works better than the last one. You were a solid S9 at first.

It is upsetting to find Pactor-3 illegally operating lower than 10.140 and then auto propnet transmissions on top of our ongoing QSO. It is about time that Riley started enforcing the regulations, I think. The auto stations are obviously just overriding ongoing QSO's on the frequency, like ours. If something is not done about it, they will take over the bands for their free email services.

Oh well, I've been in this fight for over 4 years now. Guess I am getting tired of it. The point of NBEMS is that it is narrowband, and a live operator at each end to avoid causing interference. Never want to emulate the auto stations, that's for sure!

Well, we had one successful transfer at PSK125, which is as fast as the average Pactor-3 3.3k message. The problem with the faster PSK modes is that static crashes drag the frequency around between transmissions. DominoEx is very tolerant to mistuning and can work without AFC, so I am considering that mode for HF for NBEMS and will test more later, but Olivia really does come though in the pinch!

Cul,

Skip


Re: 80 Metere Tonite

Ed <autek@...>
 

Dave AFA1HV wrote:
3675.5 ?????
That is the EXTRA PHONE section.
OOPS !!!!!!!!!!!!!!

Sorry I meant 3575.5

Thanks for catching the mistake.

Ed W3NR


Re: 80 Metere Tonite

Dave AFA1HV <afa1hv@...>
 

3675.5 ?????
That is the EXTRA PHONE section.

Ed wrote:


I know its late, but I'm going to give it a try anyhow.

CQ NBEMS PSK63

3675.5 +1500

I will move upband as QRM dictates

If 80 is a bust then I will move to

10.135.5 +1500 again move upband as QRM dictates.

Start time will be around 8:00 P.M. EST

Who starts the beacon and mode choice will be made after the initial
contact.

Hope to see you there.

Ed W3NR
fldigi/flarq Linux


Re: Some Success

Dave AFA1HV <afa1hv@...>
 

Thank's
I'm not quite sure what I did different this time but it worked. I set up Outlook Express on my Win98 computer. At least that way I keep it seperate from my regular email.
I notice that I need to indicate Text mode on every message I draft.
One neat thing I did discover is that I was able to use the Save As feature of the draft message form and put it directly into our mail folder.
I hope to get a good connect tonight. I think I had my ALC too high.
73
Dave WB2HVF


kh6ty wrote:


To keep emails from getting too large, be sure to set your compose options
to compose as "text", and not as HTML.

73, Skip KH6TY

We have had some success passing Outlook Express composed email
messages here locally. The last 2 Wednesday nights at about 8:30, 5
staions have been involved in exchanges mostly on 10 meters. I have
both sent and received messages using PSK31, 63, 125.

Also, yesterday on 30 meters, I passed an OE composed email test to
Jim, WA0LYK in Kansas. PSK63. He promptly forwarded it back through
the internet for my confirmation. This was about 4 to 5 in the
afternoon.

----------------------------------------------------------

No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.516 / Virus Database: 269.21.6/1315 - Release Date: 3/6/2008
9:07 AM


80 Metere Tonite

Ed <autek@...>
 

I know its late, but I'm going to give it a try anyhow.

CQ NBEMS PSK63

3675.5 +1500

I will move upband as QRM dictates

If 80 is a bust then I will move to

10.135.5 +1500 again move upband as QRM dictates.

Start time will be around 8:00 P.M. EST

Who starts the beacon and mode choice will be made after the initial contact.

Hope to see you there.

Ed W3NR
fldigi/flarq Linux


Re: Some Success

"kh6ty" <hteller@...>
 

To keep emails from getting too large, be sure to set your compose options to compose as "text", and not as HTML.

73, Skip KH6TY


We have had some success passing Outlook Express composed email
messages here locally. The last 2 Wednesday nights at about 8:30, 5
staions have been involved in exchanges mostly on 10 meters. I have
both sent and received messages using PSK31, 63, 125.

Also, yesterday on 30 meters, I passed an OE composed email test to
Jim, WA0LYK in Kansas. PSK63. He promptly forwarded it back through
the internet for my confirmation. This was about 4 to 5 in the
afternoon.








--------------------------------------------------------------------------------


No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.516 / Virus Database: 269.21.6/1315 - Release Date: 3/6/2008 9:07 AM


Re: Some Success

"kh6ty" <hteller@...>
 

I do not use Outlook or Outlook Express. When I tried to use express for this, it wouldn't let me set up without an E-Mail address. Help?
Can I use Thunderbird?
Dave WB2HVF
Yes, check "Radio Email Setup" under the VBdigi Help.

73, Skip KH6TY


Re: Some Success

Travis Hardin <ke3y@...>
 

Dave,
I believe either email program can be used (I used Thunderbird successfully), but with all of them you have to set up an email account. If you don't have an account, it's possible you can put fake parameters. Let me know if it works for you.
Travis, KE3Y

Dave AFA1HV wrote:


I do not use Outlook or Outlook Express. When I tried to use express
for this, it wouldn't let me set up without an E-Mail address. Help?
Can I use Thunderbird?
Dave WB2HVF

Ken Sanders wrote:

Greatings from Calaveras County, CA.

We have had some success passing Outlook Express composed email
messages here locally. The last 2 Wednesday nights at about 8:30, 5
staions have been involved in exchanges mostly on 10 meters. I have
both sent and received messages using PSK31, 63, 125.

Also, yesterday on 30 meters, I passed an OE composed email test to
Jim, WA0LYK in Kansas. PSK63. He promptly forwarded it back through
the internet for my confirmation. This was about 4 to 5 in the
afternoon.


Re: Some Success

Dave AFA1HV <afa1hv@...>
 

I do not use Outlook or Outlook Express. When I tried to use express for this, it wouldn't let me set up without an E-Mail address. Help?
Can I use Thunderbird?
Dave WB2HVF


Ken Sanders wrote:


Greatings from Calaveras County, CA.

We have had some success passing Outlook Express composed email
messages here locally. The last 2 Wednesday nights at about 8:30, 5
staions have been involved in exchanges mostly on 10 meters. I have
both sent and received messages using PSK31, 63, 125.

Also, yesterday on 30 meters, I passed an OE composed email test to
Jim, WA0LYK in Kansas. PSK63. He promptly forwarded it back through
the internet for my confirmation. This was about 4 to 5 in the
afternoon.


Some Success

"Ken Sanders" <ae6la@...>
 

Greatings from Calaveras County, CA.

We have had some success passing Outlook Express composed email
messages here locally. The last 2 Wednesday nights at about 8:30, 5
staions have been involved in exchanges mostly on 10 meters. I have
both sent and received messages using PSK31, 63, 125.

Also, yesterday on 30 meters, I passed an OE composed email test to
Jim, WA0LYK in Kansas. PSK63. He promptly forwarded it back through
the internet for my confirmation. This was about 4 to 5 in the
afternoon.


Re: Text is jumble in PSK modes in VBDIGI

Ed <autek@...>
 

travhardin wrote:
Printout is OK in PSK31, MFSK and TTY -- in fact I just talked to
OK1TN in Czech Republic via TTY (14.085).
But text is jumbled completely when trying to copy a good signal in
all PSK modes except 31. Also the single center frequency mark can't
settle on what it wants, and it AFC's all over the place. What's the
correct place for the marker?
Do I need to reinstall program, maybe?
Travis KE3Y
Huntsville, Alabama
Re-installing will not solve the problem. If some of the modes work, then all of them work. The AFC is all over the place because it is trying to lock on a signal. Try un-checking the AFC and look at the results.

With so many choices of digital modes, let alone CW and then mix in the clowns that just send a carrier, you could easily not have the right choice of mode.

I rarely if ever see other than PSK31, MFSK16, and RTTY signals on the HF bands.

Ed W3NR


Re: testing

"kh6ty" <hteller@...>
 

Roger - I could use more power also. I just finished installing a new 30m antenna when I heard your signal from the other room. I think it works better than the last one. You were a solid S9 at first.

It is upsetting to find Pactor-3 illegally operating lower than 10.140 and then auto propnet transmissions on top of our ongoing QSO. It is about time that Riley started enforcing the regulations, I think. The auto stations are obviously just overriding ongoing QSO's on the frequency, like ours. If something is not done about it, they will take over the bands for their free email services.

Oh well, I've been in this fight for over 4 years now. Guess I am getting tired of it. The point of NBEMS is that it is narrowband, and a live operator at each end to avoid causing interference. Never want to emulate the auto stations, that's for sure!

Well, we had one successful transfer at PSK125, which is as fast as the average Pactor-3 3.3k message. The problem with the faster PSK modes is that static crashes drag the frequency around between transmissions. DominoEx is very tolerant to mistuning and can work without AFC, so I am considering that mode for HF for NBEMS and will test more later, but Olivia really does come though in the pinch!

Cul,

Skip

----- Original Message -----
From: "tim.n4um" <N4UM@...>
To: <NBEMSham@...>
Sent: Thursday, March 06, 2008 4:06 PM
Subject: [NBEMSham] re: testing


Skip:

Heard you call me on CW after we finished on 40 and came back to you
several times but couldn't hear you. I guess we learned that sometimes
the gods of propagation can be pretty fickle. 30 meters was a real
digital jungle this afternoon. There should be a bounty on pactor
stations. Anyway, it was better than watching daytime TV or replacing
the guy wires on my tower with temperatures in the mid-80's.

Tim




--------------------------------------------------------------------------------


No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.5.516 / Virus Database: 269.21.6/1315 - Release Date: 3/6/2008 9:07 AM


Re: testing

"tim.n4um" <N4UM@...>
 

Skip:

Heard you call me on CW after we finished on 40 and came back to you
several times but couldn't hear you. I guess we learned that sometimes
the gods of propagation can be pretty fickle. 30 meters was a real
digital jungle this afternoon. There should be a bounty on pactor
stations. Anyway, it was better than watching daytime TV or replacing
the guy wires on my tower with temperatures in the mid-80's.

Tim


Text is jumble in PSK modes in VBDIGI

"travhardin" <ke3y@...>
 

Printout is OK in PSK31, MFSK and TTY -- in fact I just talked to
OK1TN in Czech Republic via TTY (14.085).

But text is jumbled completely when trying to copy a good signal in
all PSK modes except 31. Also the single center frequency mark can't
settle on what it wants, and it AFC's all over the place. What's the
correct place for the marker?

Do I need to reinstall program, maybe?

Travis KE3Y
Huntsville, Alabama


80 meter NBEMS

Ed <autek@...>
 

Well for all you sleepy heads that missed the run this morning, here is a brief run down.

I ran across Skip KH6TY, I was calling cq nbems with psk63. I started the beacon and once connected we transferred several files in psk125 as well as mfsk16. Some observations.

1. Don't be too quick, give flarq time.

2. Band conditions are going to dictate the mode.

3. Learn how to use the plain talk function.

4. Make sure your files are in arqsend

5. Block size depends on mode and the band.

6. Check your time out setting. I had to bump mine up to 300 seconds.

I'll be on again in the morning. 3578.5 +1500 around 5:00 A.M. EST.

Tonite is still undecided.

73

Ed W3NR
fldigi/flarq Linux


Re: NBEMS Testing

Ed <autek@...>
 

Well at least we got the pot stirred. Not much value to installing software and then not using it. My objective was to get some feel for how NBEMS works **BEFORE** we need to use it in a real emergency.

I sure picked the wrong part of the band, there were digital signals everywhere, and finding a clear spot was difficult. If I try it again this evening I'm going to need to find a better spot, probably lower in the band.

Travis KE3Y, I never did hear you, Tim N4UM, I printed you calling, but just once. Dave, WB2HVF, you were the strongest and I still don't understand why we couldn't connect once I started the beacon. The only successful connect was KI8AF and his track was barely visible in the waterfall.

As Travis pointed out, we need to make a normal keyboard to keyboard, before we even try flarq. It doesn't matter which op starts the beacon after that. If you need a file to transfer, go to the files area and download Travis's contribution called Ted.com. Make sure you place it in the arqsend folder so you can find it easily. The added bonus is that it is a program you can use once it is downloaded. I would also suggest you make a small file in case its needed. Mine is 482 bytes.

As crowded as the band was last night, QRM was just about unavoidable.

I'm also going to setup an email to send, hopefully we can see how and what is needed for it to work.

Thanks to Skip KH6TY and Dave W1HKJ for their efforts.

Ed W3NR


Re: testing

hteller <hteller@...>
 

The station was a Pactor-3 station. The frequency was 10.137. In the US, Pactor 3 operated automatically is only allowed on 30m from 10.150 to 10.140, so if a Winlink station, that Pactor 3 station was operating illegally. Although possible for keyboard to keyboard operation, and fast image transfer, it does not appear that there is any non-automatic Pactor-3 operations on the bands. Winlink PMBO, VE2AFQ, also operates Pactor-3 just below 14.070. He is Canadian, and not REQUIRED to adhere to FCC regulations, but Canada just signed on to the IARU Region 2 bandplan, which does not allow Pactor 3 outside the US autosubands. Why is he ignoring the IARU bandplan? Why is he allowed access to the Winlink CMS servers if he is not going to adhere to the IARU bandplan?

I have nothing against Pactor 3 stations, as long as they adhere to internationally agreed upon bandplans or FCC regulations and do not increase in bandwidth without first checking for adjacent signals (impossible, of course). Of course, nobody without an SCS modem can tell who the Pactor-3 station was.

In addition, three times, a PropNet station regularly came on top of our NBEMS QSO. It is unreasonable to believe he could not have copied either me or N4UM, but it transmitted anyway, obviously under illegal automatic operation (not listening first) outside of the beacon band. Such activities belong in the auto subbands or beacon bands so everyone else who does check for activity first, because there is a live operator to listen, can also operate in our SHARED bands.

Winlink's network obviously can be very useful for some kinds of emcomm traffic as well as for free email for sailors, but there is no reason for their members not to operate according to the rules everyone else must follow. Winlink could not get their job done with narrowband modes, so there is a place for wider modes that can handle deep QSB fades. NBEMS is still considering all modes, and for HF, will have to use some wider modes, such as MFSK16 or DominoEx, to be able to handle QRN that the faster PSK modes cannot, as we have now discovered.

NBEMS is not a mode, but a *system* of software, suggested bands and antennas, and operating practices, intended to provide "johnny on the spot" emcomm in a distributed way that existing systems cannot do. Using PSK63 as a base mode is best for that because all NBEMS stations will be found in one known place by any station that can help with forwarding. We intend to get the job accomplished by using narrowband modes whenever possible, but the job must get done, and if it takes wider modes to do that, we will have to incorporate them into the NBEMS system, but it is unlikely we will have to go wider than 500 Hz. Throughput is a tradeoff between bandwidth, file size, and robustness. What is not known with current systems, or even NBEMS yet, is the amount of time spent trying just to get a connection. We think our distributed system will eventually provide enough forwarding stations so connection times are very fast. The saving in time can much greater than systems which use wider bandwidth modes, but less forwarding stations (there is only so much space available - phone ops can verify that!). Even during the Winlink MARS test, the commander reported that local connectivity was not possible because of propagation, so it was necessary to connect with a station far away, in Utah. You know what that means - a lot of time was wasted trying to connect locally, which probably more than quadrupled the total time from attempted connection to final message delivery. Under those circumstances, if slower modes, but more available fordwarding stations, were used, the speed of transfer would not be so important compared to the time to get a connection. Once a long distance connection has to be made, it is more susceptible to QSB than a NVIS connection, for instance, again increasing the transfer time by an unreported amount.

NBEMS is in beta, and we are gathering experience to optimize the system. We have not ruled out any modes at this time, except voice-bandwidth digital modes, because we feel the job can be done without going to such extremes. We intend to push using 2m VHF SSB digital to the limit, which is reliably about 100 miles. Past that, propagation is too variable to be dependable. Linked DStar repeater systems can go over 100 miles, as long as the repeaters are up, and have very fast throughput, but when the repeaters are down, all the speed in the world is not going to get the message through as a slower system that still works.

73, Skip KH6TY


Rick wrote:


Skip,

I know you don't particularly care for Pactor 3 stations, but isn't it
completely legal to operate Pactor modes at any point in the band since
the whole band is RTTY/Data?


It is only when you are operating an automatic station here in the U.S.
that it would not be legal. If the Pactor station is outside the U.S.,
then they follow their countries rules, which may allow automatic
operation throughout the bands.

If we are striving to come up with solutions for emergency
communications, we should keep all options on the table including
automatic operation since we can never be sure of having operators
available 24/7/365 on a given mode and band. I agree that we should be
doing this with spectrum conserving modes, if possible, and that is why
PSKmail could even have potential in the U.S. if it was made available
on MS OS as well as Linux OS.

With the tests that I have done, I would have to say the best ARQ sound
card mode is FAE400 and this is confirmed by other digital operators
that I have compared notes with.

Also, having a BBS station that could act as a hub, without Pactor
(sound card modes of some kind) would be helpful. The RFSM software
system has this already, including I just found out, group chat without
ARQ. Here in the U.S. this can not be used below 6 meters and it can not
work into the noise like many of the sound card modes. But on quiet VHF
bands, this might do very well.

We are very fortunate to suddenly have a number of options that were not
available even a year ago.

73,

Rick, KV9U

k


Re: NBEMS Testing

Dave AFA1HV <afa1hv@...>
 

I should have signed this,
Dave WB2HVF

Dave AFA1HV wrote:


Hi everyone.
It was an interesting test to say the least.
After discontinuing my attempts to allow someone else to try, I noticed
the MFSK stations moved up a bit. In reading the mail they feel we
stepped on their toes. If I did, I'm sorry. I think part of the
misunderstanding with other operators is the fact that once we go into
the ARQ or beacon mode we are in a semi-automatic mode but they, not
understanding the new system, feel they can jump in on the frequency if
no one else comes back.
I have had a successful connect several weeks ago and I did show a
connect to you Ed but I do not know your end confirmed it. You had a
good strong signal here also and it should have worked. Our direct
keyboard to keyboard seemed to work ok.
But this is what BETA testing is all about.
Maybe we need to do our psk testing more toward the psk area of the band.

Ed wrote:

Bill McLaughlin wrote:
Hi Ed,

I see a a few there: yourself, WB2HVF, KI8AF and N4UM. Perhaps once
connected the beacon should not activate?

See colliding signals due to that. Signals from all were very good but
a bit congested.

73,

Bill N9DSJ
First off, thanks to all who tried to connect. KI8AF was the weakest and
the only one to successfully connect. WB2HVF was the strongest, but we
never did connect. Then a MFSK-16 station opened up right on frequency,
so I moved up band a little. Only to be clobbered by a RTTY station
calling CQ. I have my TX locked, but I noticed my AFC had to move quite
a bit to copy some of you.

Here is the lineup for tomorrow. I'll be on 3578.5 +1500 at 5:00 A.M EST
in the morning. If that QRG is busy Ill try 3576.0 +1500 and will CQ and
beacon for an hour PSK63. The evening foray will depend on the YL's
plans.

I was dismayed to see that one of the offending MFSK-16 stations is a
member of this list. Hopefully the QRM was unintentional.

Good night all...73 and thanks again.

Ed W3NR

Using fldigi/flarq Linux version of NBEMS