Date   

Re: RTTY Invert Capability?

w1hkj <w1hkj@...>
 

You would have to use the LSB check box on the Waterfall configure dialog. You should use your transceiver in USB for all RTTY on all of the bands for normal right side up reception and transmission of RTTY.

73, Dave, W1HKJ


Re: RTTY Invert Capability?

Ed <autek@...>
 

k6ask wrote:
Is there an RTTY capability for inverting character detection? It would be very handy to have a button available to toggle non-invert/invert because some RTTY stations often have their signal inverted. At present, when one moves from one signal to another, because of this some are immediately legible and some are not.
Perhaps this function is available and I just havn't found it.
Bob - K6ASK
Not in the main window , but there is a choice in the setup area to do so. But it requires some extra keystrokes to invoke and return to the default. Plus I have found that a station that is inverted quickly learns to get right-side-up when no one is answering their calls.

USB RTTY is the default in NBEMSham and works perfectly, with no problems decoding. I know this is not the "norm" for RTTY, but it works and works well.

Ed W3NR


Mode Comparison

"Bev & Jerry Chambers" <btjc1997@...>
 

Has there been any comparison study between NBEMS and "Air Mail" via 2 Meter Packet?
 
I know Packet requires a lot more band width than PSK31, but that wouldn't seem to be a problem as there is hardly any Packet activity now. There also might be an equipment advantage to Packet with all the old FM rigs and TNC's gathering dust.
 
Also, what frequencies are being used by NBEMS at the present?
 
73, Jerry - W6LQR


Re: Mode Comparison

"kh6ty" <hteller@...>
 

----- Original Message -----
From: "Bev & Jerry Chambers" <btjc1997@...>
To: <NBEMSham@...>
Sent: Sunday, January 13, 2008 3:54 PM
Subject: [NBEMSham] Mode Comparison


Has there been any comparison study between NBEMS and "Air Mail" via 2 Meter Packet?

I know Packet requires a lot more band width than PSK31, but that wouldn't seem to be a problem as there is hardly any Packet activity now. There also might be an equipment advantage to Packet with all the old FM rigs and TNC's gathering dust.

Also, what frequencies are being used by NBEMS at the present?

73, Jerry - W6LQR

Jerry,

The idea behind NBEMS is to be able to reliably bridge a disaster area for up to 100 miles, without dependence upon a repeater system, which may be inoperative.

By using PSK63, NBEMS is able to do that on 2m with small, portable, antennas, or on HF, using NVIS antennas.

The range using packet is considerably less than 100 miles, as without any repeaters in a high location, I believe that the typical reliable range on FM simplex is usually considered to be only around 30 miles, depending on the terrain. In a system like FM, once you have achieved full limiting, ARQ is probably not needed anyway to insure error-free message transfer.

The initial frequencies for 2m NBEMS operations have been chosen to coinside with the nationally agreed upon PSK31 calling frequency, which is 144.144 MHz, USB, and extending 2.5 KHz higher. When NBEMS becomes widely used, it is recommended that PSK63 activity might have to be moved starting 2.5 KHz higher than PSK31 activity, as is the convention on the HF bands. This would be done to prevent PSK63 signals, which are twice as wide as PSK31 signals, from interferring with adjacent signals using PSK31.

Due to the "resuable" nature of 2m frequencies (i.e. they do not travel long distances very well), it will probably be a very long time before PSK63 activity on 144.144 MHz becomes a problem to PSK31 operators, if ever. Here in South Carolina, we run a twice-weekly PSK63 net on 144.144 MHz, USB, around 1500 Hz tone frequency, and there is never anyone else in the bandpass, but we wish there were more activity!

73, Skip KH6TY





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Re: 2m default frequency...

"Jeffrey P. Nast" <jpnast@...>
 

Hi Skip,

I'm using a Kenwood TM-D700A, and it is an FM only. I have a TS-480, but only goes up to 6m. Working great on FM.

Thanks and 73!
-Jeff
KC�MKS


kh6ty wrote:


Hi Jeff,

What brand and model of VHF radio are you using? Is it an FM-only radio?
NBEMS is primarily intended to be used on VHF SSB with PSK audio.

The default of 144.144 is what appears to be the nationally agreed upon
calling frequency for PSK31, and easy for people to remember, so that is why
we chose that frequency as a default. Changing the default was excactly the
right thing for you to do.

73, Skip

----- Original Message -----
From: "Jeffrey P. Nast" <jpnast@... <mailto:jpnast%40lca.duluth.mn.us>>
To: <NBEMSham@... <mailto:NBEMSham%40yahoogroups.com>>
Sent: Friday, January 11, 2008 1:32 AM
Subject: [NBEMSham] 2m default frequency...

Noticed in VBdigi that the 2m default frequency is 144.144 with the
tone at 144.145.

Not sure about your radios, but I can't tune to 144.144 because my 2m
radio only allows 5kHz steps... closest I can get it 144.145.

I deleted the default and put in my own. Perhaps change the default?

Thank you!!!!
-Jeff Nast
KC�MKS

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RX-TX Offset

"Bill" <wa0ypl@...>
 

I'm new to PSK. What offset do I put into my 817/857 for use on PSK31?
The manual recommends +2100. Right now it's set to 0. I'm confused
about offsets.

Bill WA0YPL DM37dt


Getting Started?

"mdgolfbum" <jim@...>
 

Is there a "getting started" page somewhere? I've never found much
interest in digital modes so I'm coming from a CW background.

Should I first get a PSK31 install going then try this out?

Is there a recommended interface between rig and sound card?

tnx
jim ab3cv


/W Sound Blaster Live Value

"Sam Saladino" <ortracr@...>
 

I built this computer about 10 years ago and it's growing whiskers,
but still does about 95% of what I want it to. The sound card I'm
using is the old Creative Labs Sound Blaster LIVE Value. Just in case
someone else is using this card and it's driving you nuts, I thought
I'd include this information. Last week when I first installed the
NBEMS Suite I hooked it up through the LINE IN jack on my soundcard.
For the first couple of days I could hear the signals coming through
my speakers, but nothing was showing up on the VBdigi display. Friday
morning I thought I'd take another look and I was surprised to find
the Waterfalls being displayed all over the place. Another attempt
later on Friday again showed nothing.

Today I've un-installed and reinstalled the programs several times
with no change.. still no waterfalls. I'd move the patch cord from the
LINE IN to Microphone In and get the waterfalls, but every time I went
back to LINE IN, nothing. So I thought I'd come here to see if anyone
else had posted a similar problem, and while glancing through the
posts stumbled across the solution on my own. In the Creative Surround
Mixer program, on the far right is the recording control that you use
to choose which input the recording portion of the program will use to
record. I clicked on that and changed from Microphone Input to LINE
IN and there were the Waterfalls showing up all over the display
again. So apparently even if you see and hear them, they won't go to
the NBEMS program unless that selection is made, at least on this card.

73s
Sam NW9T


Re: /W Sound Blaster Live Value

w1hkj <w1hkj@...>
 

Thanks for the info Sam. That card is also problematic on Linux.

73, Dave, W1HKJ


Any other modes for the future?

"Jim McLaughlin" <wa2ewe@...>
 

Hi Dave,

This is a great application. Very easy to install and operate. Smooth
sailing on a WinXP Home SP2 box. Will you be adding any other digital
modes such as MT-63 or Olivia in the future?

Thanks and 73,

Jim, WA2EWE


Re: Any other modes for the future?

w1hkj <w1hkj@...>
 

Jim McLaughlin wrote:

Hi Dave,

This is a great application. Very easy to install and operate. Smooth
sailing on a WinXP Home SP2 box. Will you be adding any other digital
modes such as MT-63 or Olivia in the future?

Thanks and 73,

Jim, WA2EWE











The modes are restricted to the MMVARI control and the source code for the control is not public.  Additional modes would require that the MMVARI author add them or release the source to the public domain.

Sorry.

73, Dave, W1HKJ


Re: /W Sound Blaster Live Value

"Frank Krasnicki" <k1cru@...>
 

--- In NBEMSham@..., w1hkj <w1hkj@...> wrote:

Thanks for the info Sam. That card is also problematic on Linux.

73, Dave, W1HKJ
I had a lot of noise using this card. I finally gave up on it and for
$30 I bought an iMic USB sound adapter. It's got line in and speaker
out and plugs into the USB port. It got the audio out of the PC noise
environment and gave me nice clean xmit and receive signals.
Frank
K1CRU


Re: /W Sound Blaster Live Value

"Sam Saladino" <ortracr@...>
 

One more piece of information I can pass along about this sound card.
When I first hooked up my Line-Out to transceiver patch cord, I had
no signal getting to the rig. I switched over to the speaker out, but
even with the volume to as low as I could get, it was overdriving the
transceiver. It turns out the LINE OUT actually doubles as the rear
speakers out when your computer is set up for 4 speakers. To activate
the LINE OUT you have to go into your "Surround Sound Mixer" and
change the setting from the standard two speaker set-up to 4 speakers.
I haven't actually tried a QSO yet, but did a test and everything
appears to be working fine. Using the LINE OUT made a big difference
in controllability of the transceiver over Speaker Out. I was
planning on stringing up a 40 meter NVIS to try it out there, but with
the Sub-Zero temps forecast for this week-end, I think I'll stick to
the attic dipoles for now.

73s
Sam NW9T


Various problems

"Shelby Ennis" <w8wn@...>
 

Rig-to-rig tests across room -
On desktop, won't control any com port. Have to use USB > RS232
adapter; OK that way. Com port control OK on laptop. Other pgms have
no trouble with desktop's com ports.
(Keyboard-to-keyboard with PSK31 OK. Sylpheed OK for regular E-mail
account).
Difficulty connecting across room with PSK250.
Many repeats required to send 5-word test msg, PSK250. PSK31 much too
slow - with repeats, taking forever just for header.
Had to also delete all standard E-mail info from Sylpheed - instead of
the cued msg, it kept trying to send something else. Really strange.
Later, one message seemed to be sent, but was not and could not be
found anywhere on either computer!
No more time for more testing yet.
Shelby, W8WN


Suggestions and question...

"Jeffrey P. Nast" <jpnast@...>
 

There are a few of us here testing NBEMS. In our tests we have noticed a couple things that would be nice...

* flarq - We would like to see an option to rearm the Beacon after another station disconnects. Reason: I can understand why the Beacon currently does not rearm, since this is not supposed to be automated operations. But if I was at Net Control, I would want my beacon to automatically "Rearm After Disconnect" so other field stations can find and connect without manual intervention from me. Net Control is busy enough without having to remember...

* vbdigi - In our testing it was possible for a remote station to slowly "drag" my tone (via AFC) up/down to a tone frequency where vbdigi could no longer operate. I would like to see a vbdigi option that would lock my node down to a specific tone, but still allow for AFC within certain (definable?) limits. Reason: Again, if I was a Net Control station I would not want someone else, whether accidental or malicious, to drag my tone to a useless region on the spectrum. Plus all other field stations would expect Net Control to be at a certain tone within +/- amount.

Lastly, one of our testers is using an IC-V8000 and notices that whenever the radio transmits the cooling fan comes on. This is normal operation, except that the "Green Bar" signal strength goes to 100% when the fan is running. Anybody else notice this? I don't see this on my D700 when the fan comes on. I have a feeling the fan noise is being injected into the audio somewhere before the laptop.

Thank you! 73!!
-Jeff Nast
KC�MKS
Knife River, MN


Re: Suggestions and question...

w1hkj <w1hkj@...>
 

There are a few of us here testing NBEMS. In our tests we have noticed a
couple things that would be nice...

* flarq - We would like to see an option to rearm the Beacon after
another station disconnects. Reason: I can understand why the Beacon
currently does not rearm, since this is not supposed to be automated
operations. But if I was at Net Control, I would want my beacon to
automatically "Rearm After Disconnect" so other field stations can find
and connect without manual intervention from me. Net Control is busy
enough without having to remember...

That can be considered for a future update.

* vbdigi - In our testing it was possible for a remote station to slowly
"drag" my tone (via AFC) up/down to a tone frequency where vbdigi could
no longer operate. I would like to see a vbdigi option that would lock
my node down to a specific tone, but still allow for AFC within certain
(definable?) limits. Reason: Again, if I was a Net Control station I
would not want someone else, whether accidental or malicious, to drag my
tone to a useless region on the spectrum. Plus all other field stations
would expect Net Control to be at a certain tone within +/- amount.

Use the "Split" control and your transmit frequency will not move.

Lastly, one of our testers is using an IC-V8000 and notices that
whenever the radio transmits the cooling fan comes on. This is normal
operation, except that the "Green Bar" signal strength goes to 100% when
the fan is running. Anybody else notice this? I don't see this on my
D700 when the fan comes on. I have a feeling the fan noise is being
injected into the audio somewhere before the laptop.

Check your Windows "Volume Control" to see if the Microphone is Muted.

73, Dave, W1HKJ


Re: Suggestions and question...

"Jeffrey P. Nast" <jpnast@...>
 

Hi Dave,

Thank you for the responses below and your willingness to consider a
future update.

For the "Split" check box, I was afraid my lack of knowledge would
lead to the response that you gave. In all fairness, I did try to do
some research and could not find any explanations for the check boxes
on the right side of the waterfall. When time permits, adding those
check box functions into a help file would be nice.

I have also noticed that the yellow line (threshold) in the signal
strength "meter" can be moved with a "click-drag". Most likely to
eliminate unwanted text and hieroglyphics in a noisy RF environment.
Didn't find anything on that in the help files either.

And... (sorry, I drone on) noticed that the "shift-up/down/left/right
arrows" will change the Rx/Tx frequencies in the fields to the right
of the waterfall display. With the "Split" checked, on the Tx moves.
Cool! A nice short cut that I could not find mention of in the help files.

A great piece of software! Thank you very much! 73!
-Jeff Nast
KCØMKS

--- In NBEMSham@..., w1hkj <w1hkj@...> wrote:

There are a few of us here testing NBEMS. In our tests we have noticed a
couple things that would be nice...

* flarq - We would like to see an option to rearm the Beacon after
:
:
That can be considered for a future update.

* vbdigi - In our testing it was possible for a remote station to
:
:
Use the "Split" control and your transmit frequency will not move.

Lastly, one of our testers is using an IC-V8000 and notices that
:
:
Check your Windows "Volume Control" to see if the Microphone is Muted.

73, Dave, W1HKJ


Re: Suggestions and question...

w1hkj <w1hkj@...>
 

For the "Split" check box, I was afraid my lack of knowledge would
lead to the response that you gave. In all fairness, I did try to do
some research and could not find any explanations for the check boxes
on the right side of the waterfall. When time permits, adding those
check box functions into a help file would be nice.

I have also noticed that the yellow line (threshold) in the signal
strength "meter" can be moved with a "click-drag"

. Most likely to
eliminate unwanted text and hieroglyphics in a noisy RF environment.
Didn't find anything on that in the help files either.

And... (sorry, I drone on) noticed that the "shift-up/down/
left/right
arrows" will change the Rx/Tx frequencies in the fields to the right
of the waterfall display. With the "Split" checked, on the Tx moves.
Cool! A nice short cut that I could not find mention of in the help files.


All need to be added to the help file.  Thanks for the reminder.

73, Dave, W1HKJ



Re: RTTY Invert Capability?

"Ray 9H1RA" <abelaraymond@...>
 

--- In NBEMSham@..., "k6ask" <K6ASK@...> wrote:

Is there an RTTY capability for inverting character detection? It would
be very handy to have a button available to toggle non-invert/invert
because some RTTY stations often have their signal inverted. At
present, when one moves from one signal to another, because of this
some are immediately legible and some are not.

Perhaps this function is available and I just havn't found it.

Bob - K6ASK
Hi Bob good post as i also tried hard to find this invert button but
still no luck...

73's

Ray

9H1RA


Re: RTTY Invert Capability?

Ed <autek@...>
 

Ray 9H1RA wrote:
--- In NBEMSham@..., "k6ask" <K6ASK@...> wrote:
Is there an RTTY capability for inverting character detection? It would be very handy to have a button available to toggle non-invert/invert because some RTTY stations often have their signal inverted. At present, when one moves from one signal to another, because of this some are immediately legible and some are not.

Perhaps this function is available and I just havn't found it.

Bob - K6ASK
Hi Bob good post as i also tried hard to find this invert button but
still no luck...
73's
Ray
9H1RA
Is this what you are looking for ?

From the vbdigi help file :::


Waterfall Colors and Appearance
You can change the background color and the palette used for the waterfall. Select the Waterfall item from the Configure menu.



vbdigi is installed with several palettes to select from or you can design and save your own palette. Waterfall color schemes is one area that is highly individual and what works well for one person may not be good for another. Press the Load button and you can pick from a list of palette files. The color bar at the left of the dialog will change as you load different palettes. The waterfall will also change so you can see the effect immediately. Each small button to the right of the color bar can be clicked to change the color with that signal level. When you are finished and like your scheme you can save it using the Save button. Assign your new palette to a new name such as your "callsign.pal". The base color can also be changed. This is the color for the background of the waterfall and the waterfall scale.

The waterfall / spectrum display is a part of the MMVARI ocx control that vbdigi uses for digital signal processing. It's resolution is not as good as some other programs such as fldigi for Linux, but is quite adequate for the purpose intended. If you want to see a bit more detail on the received signal you can click the "1500" range button. I recommend that you keep the range in "3000" mode for routine use. The waterfall horizontal size is also fixed when first installed. You can change this allow the waterfall to fully extend horizontally when the application is resized. Just click the "Expand Waterfall" check box.

If your receiver is receiving signals in the LSB mode then you can click the "use LSB" check box. This will not effect the decoding or transmission of psk signals, but it will effect both MFSK and RTTY which are sensitive to frequency pair inversion.
Colors & Fonts


Ed W3NR