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Re: Exciting news re GPS...
Keith Maton
¿ªÔÆÌåÓýSounds very good to me.Will this still be happy with the Adafruit unit and the 100mS pulse width? 73 Keith. On 27 Jun 2013, at 23:13, Hans Summers <hans.summers@...> wrote:
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Exciting news re GPS...
Hans Summers
All As some of you know, I have what I call a "GPS Simulator" which is an ATmega88 I programmed to send a NMEA string with the $GPRMC sentence, and it also has a realtime clock which updates correctly in the $GPRMC, and produces a 1pps signal output. Using this I can model different settings, baud rates, and 1pps pulse widths.
From the comments on which GPS modules worked and which didn't, there seemed to be a consensus opinion that GPS modules having very short (microseconds) pulse widths on the 1pps signal, do not work properly in v2.02a. So I have set my simulator with a very short pulse width, less than 1us. Using this setting I can see the seconds jump sometimes in 2 second jumps. So I am able to reproduce the same problem some GPS modules show.?
Next I printed out my code and stared at it all week on the train to and from work. ?I came up with a strategy for fixing it. This evening I tried the strategy. It works! In my simulator at least! Everything is ticking away here nicely with 1 minute frame, message "E" in FSK/CW with speed 006, GPS on, and < 1us pulse width. Heartbeat is beating nicely and 125MHz calibration has occurred, as have time setting and Maidenhead locator.
I will now send a v2.03 chip (as it will be called) to Eddie G3ZJO (proud Trimble owner) and Andy G0FTD (UP502 GPS) and Tony G0BZB (EM406). If you three can try it and it works on all three then I think this will be excellent progress indeed, maybe finally the Ultimate2 GPS issues will be over and we'll have widespread compatibility with most GPS modules.?
Fingers crossed... 73 Hans G0UPL ? |
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2.02k installed and working very well
Keith Maton
Today I took delivery of 2.02k and some extra LPF boards.
Along with my Adafruit GPS, it's working very well. I've been running WSPR and FSKCW on 30m within the same ten minute frame for a few hours today and it's very stable. I set the speed to 7 and prefixed my callsign in the 'message' field with two spaces to give roughly equal leading and trailing low tones. I think it looks rather good. Here's a capture from the LA5GOA grabber which was taken a few minutes ago. It's good to be able to run WSPR for the instant gratification through and then to be able to go look around the grabbers for the QRSS signal. Thanks Hans for this great addition. 73 Keith, G6NHU |
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2.02a and 2.02k chips arrived this morning
"Philip"
Adafruit GPS module working perfectly with the new firmware.
My Trimble GPS which worked with ver 2.01 doesn't work with 2.02a but I half expected that as it's noted on Hans web site.. Love the menu selector halting between character sets....great stuff.. Anyhoo,going to try my new 2.2k chip tomorrow.. Philip G4JVF |
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Re: Note about ordering...
"David Atkins"
¿ªÔÆÌåÓýThe updated software [and additional LP filters] arrived
this afternoon. Clearly and competently packed, as before.
Busy tonight, but I will try a couple of GPS modules
tomorrow.
I have high hopes ;-)
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David
G8XBZ From: QRPLabs@... [mailto:[email protected]] On Behalf Of Hans Summers Sent: 16 June 2013 11:17 To: qrplabs@... Subject: [QRPLabs] Note about ordering... All
Please note, U2 kits are still pending arrival of components here. So if
you make an order which includes a U2, I hope it is Ok for you to wait for it
all to be shipped together.
73 Hans G0UPL |
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v2.02a not quite doing what it should with gps up501
Andy Cutland
Hi all, I seem to be having some trouble with the new chip. The kit locks onto the satellites no problem and calibrates and sets the time fine but after a transmission period the time is wrong which means there is no chance of it transmitting the next frame on time. On a wspr tx the time is normally 1 minute 50 seconds slow when the end of frame is reached. I tried on fskcw today and the same problem seemed to be encountered. Tonight i will try adding a few resistors on the pps and data line to see if that helps. In the mean time does anyone have an idea as to what may be causing this problem ? 73's de andy |
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Re: v2.02k - Twice the fun, WSPR and QRSS together! (and new feature request)
"Colin XSD"
¿ªÔÆÌåÓýYes Hans, that is basically it.
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Just like you do now for WSPR with the 4 digit locator but with the option
to specify between 4 & 10 digits (depending on the accuracy/transmission
time you want).
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I realise it is no simple task but I figured that since you had the data
there already why not do something useful with it.
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It is no great problem if you can¡¯t do it, it will just save me a lot of
time doing it manually, thats all.
?
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73, Colin M0XSD.
? From: Hans Summers
Sent: Wednesday, June 26, 2013 1:30 PM
To: QRPLabs@...
Subject: Re: [QRPLabs] Re: v2.02k - Twice the fun, WSPR and QRSS
together! (and new feature request) ?
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Hi Colin
You are saying an automatic locator, which gets the latitude and longitude
from a GPS module, converts them into all those digits, and appends it with an
accuracy specified by you?
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73 Hans G0UPL |
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Re: v2.02k - Twice the fun, WSPR and QRSS together! (and new feature request)
Hans Summers
Tony I never said I could do that for him. I just wanted to make sure I understood the question, first ;-) ?? It sounded like rather a tall order. Do you know how long it took my feeble brain to work out how to turn the text stream coming from the GPS into the correct 4-character Maidenhead locator.... ? Until reading this email I had no idea Maidenhead locators went any further than 6-characters.?
73 Hans G0UPL On Wed, Jun 26, 2013 at 3:26 PM, Tony Volpe <tony.volpe.1951@...> wrote:
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Re: v2.02k - Twice the fun, WSPR and QRSS together! (and new feature request)
Hans Summers
Hi Colin?
You are saying an automatic locator, which gets the latitude and longitude from a GPS module, converts them into all those digits, and appends it with an accuracy specified by you?
73 Hans G0UPL |
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Re: v2.02k - Twice the fun, WSPR and QRSS together! (and new feature request)
"m0xsd@..."
Hans,
toggle quoted message
Show quoted text
My v2.02k arrived this morning and is now up & running under test and seems to be working just fine. I was wondering if it would be possible to append an automatic QRA function to the QRSS Message in a future incarnation of the 'k' version? i.e. in my case a Message of 'M0XSD ' would become 'M0XSD QRA IO84GN00SB'. With the menu item being in the range 0 to 10 in even steps, 0 being off (no QRA displayed) up to the maximum of 10 (as shown in my example above). I would find this extremely useful to let people know my exact position (to the accuracy defined) when out portable. 73, Colin M0XSD. --- In QRPLabs@..., "m0xsd@..." <m0xsd@...> wrote:
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WSPR Problem Using V2.02a
"John"
¿ªÔÆÌåÓýHi Group,
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I've installed the new V2.02a chip, but having
problems when using WSPR. The transmission starts OK but at the end of the 2
minute period the RF does not shut down. Has anybody experienced
this?.
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Hans, I'm using a Navman Jupiter 21 GPS module
(TU21-D450-021).? I rescued 3 from EPIRBs that were considered beyond
economical repair by our marine dept. and destined for the WEEE waste. It works
fine on both the old and new version of the chip, but does need an external
antenna, another one for the GPS compatability list.
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73,?John
G4SMX |
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Re: A note re shipping...
"m0xsd@..."
Thanks Hans,
toggle quoted message
Show quoted text
I don't have to wait any longer, my v2.02k chip and a couple of LPF filters arrived this morning (26th Jun 3013). Fitted the chip, put in some setting & fired it up & have already heard & decoded myself on 40m WSPR :) Now to see if I can see myself on QRSS. 73, Colin M0XSD. --- In QRPLabs@..., "Colin XSD" <m0xsd@...> wrote:
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Re: U2 on 20m kills 30m.
Tony Volpe
That's quite a typical response for a receiver when it has a strong local signal overwhelming its front end and producing intermodulation products. Even though the UQ is qrp or even qqrp, when it is right next to the receiver, t will put a hell of a big signal into the receiver even if it is adequately screened, it will get in through the coax braid and in other ways, even if it doesn't just get in via the receiver antenna. Just the other day, I received a notch filter for my Freeview TV from the 4G people ?to protect my reception from their new transmissions on 800 mhz. My Freeview channels are around 700 to 780 mhz. They must be going to fire up a 4g transmitter near to my location soon. The problem they are trying to counteract is the same one you have seen happening with your UQ beacon. Tony G0BZB |
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U2 on 20m kills 30m.
Keith Maton
OK, here's a good one.
I'm running my QRSS grabber on 30m right now and sitting on top of the TS-590 is my U2 kit transmitting WSPR on 20m. When it's transmitting, I totally lose everything on 30m and I get a really strong broadcast station. If I switch the wireless to AM, it's showing +40dB on the LCDometer. Clearly there's some mixing going on there somewhere with a product ending up on my QRSS frequency but I'm not sure exactly what's doing it. It's a shame I've not heard an ident from the broadcast station, it would be nice to know where it's coming from. This is not a complaint, merely an observation. 73 Keith, G6NHU |
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Re: Best DX on 80 meters
"Yannick"
Hi Paul,
toggle quoted message
Show quoted text
I saw you were spotted by VK7DIK. My working conditions are similar to yours (1W to low OCF dipole) and he spotted me too. Season seems to favor north/south paths on low bands. 73, Yan - XV4Y. --- Yannick DEVOS - XV4Y --- In QRPLabs@..., "Paul KE7HR" <ke7hr@...> wrote:
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Re: A note re shipping...
"Colin XSD"
¿ªÔÆÌåÓýThanks for the reminder Hans.
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I was just thinking ¡®I wonder where my order has got to¡¯. I guess I have a
few more days to wait .
I (and I¡¯m sure most people here) understand and don¡¯t mind the wait but it
doesn¡¯t stop us being impatient .
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73, Colin M0XSD.
? From: Hans Summers
Sent: Monday, June 24, 2013 10:39 PM
To: qrplabs@...
Subject: [QRPLabs] A note re shipping... ?
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Good evening all
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A quick note about the shipping. Orders are normally shipped the next
business day after they are received. The exceptions are:
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1) When a huge volume of orders are received suddenly, it can take a while
to clear. An example is the sudden influx of orders from people who wanted
v2.02a or v2.02k chips. In that case the orders are worked through but it took a
week until every order was sent.
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2) When the kit is out of stock, such as the Ultimate2 - in which case
you'll have been advised on the ordering page of that. The U2 kits are now
pending only on the PCB, which the manufacturer claimed would take a week to
make but in fact took very much longer. The latest date they gave me is tomorrow
(Tuesday 25'th), then they have to be shipped to me; hopefully we are getting
close now.
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So please be patient in case 1) because as you know, this is a low cost
operation, there are not a whole army of people waiting on orders and ready to
go immediately an order comes in :-)
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73 Hans G0UPL |
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A note re shipping...
Hans Summers
Good evening all A quick note about the shipping. Orders are normally shipped the next business day after they are received. The exceptions are: 1) When a huge volume of orders are received suddenly, it can take a while to clear. An example is the sudden influx of orders from people who wanted v2.02a or v2.02k chips. In that case the orders are worked through but it took a week until every order was sent.
2) When the kit is out of stock, such as the Ultimate2 - in which case you'll have been advised on the ordering page of that. The U2 kits are now pending only on the PCB, which the manufacturer claimed would take a week to make but in fact took very much longer. The latest date they gave me is tomorrow (Tuesday 25'th), then they have to be shipped to me; hopefully we are getting close now.
So please be patient in case 1) because as you know, this is a low cost operation, there are not a whole army of people waiting on orders and ready to go immediately an order comes in :-)
73 Hans G0UPL |
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Re: U2 and GPS report (good)
Frank Allen
Thanks. I was was heading in that direction, but thought I'd ask. Up here in the puckerbrush of Maine Radio Shack knows cell phone and almost nothing else, so I've got to order online ! ? On Mon, Jun 24, 2013 at 1:08 PM, Andy Cutland <gj7rwt@...> wrote:
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Re: U2 and GPS report (good)
Andy Cutland
Hi Frank, I used a separate 3.3v reg to supply pins 4 and 5 directly. no resistors were used anywhere on the gps unit. Pin 6 is pps and pin 2 is txd. Pin 3 is earth. Hope this helps. 73's De Andy From: Frank Allen To: QRPLabs@... Sent: Monday, June 24, 2013 4:22 PM Subject: Re: [QRPLabs] Re: U2 and GPS report (good)
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How do you handle the additional 3.3VDC for the UP501 ? On Mon, Jun 24, 2013 at 10:13 AM, Andy Cutland <[email protected]> wrote:
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