Hi,
I have a problem with my ultimate 3s.

I am owner of a clock and an ultimate 3skit.

The clock shows gps data and the 1pps signalis blinking.

Both are connected via cable.

The U3s has no Heartbeat symbol and shows always cal in thesecond line in the display.

the settings are:

wspr 10.140.200
Frame SET is 10 10
gps mode 2 009,600
gps info check 0 1
cal step time 10 120
park 000,000,000
sys freq 20,000,000
ref freq 27,104,000


The time comes after minutes alone.

Can somebody explain what i am doing wrong ?

Thanks a lot

73 Sebo de DL7LE

Frame at 10 10 looks suspicious.   Try a start time of zero and frame 10 to see if that works.

Thank you for your answer.

 

I have set FRAME START to 00 10 .  Than came ERROR : 0 (FRAME START)

 

What should i do ?

-----ursprüngliche Nachricht-----
Von: rcarr@...
Gesendet: 26.01.2021 15:30 Uhr
An: qrplabs@groups.io
Betreff: Re: [QRPLabs] U3S fw 3.12 no heartbeat no cal

Frame at 10 10 looks suspicious.   Try a start time of zero and frame 10 to see if that works.

-----ursprüngliche Nachricht Ende-----

Stick on 10 10 until you get it working, tweak the timing later, but keep to even numbers. 10 12 works fine for me.

Thank you M0ORE,

 

10 10 doesnt work.

 

Only seeing CAL . The Beacon is on since yesterday. There is no calibration.

-----ursprüngliche Nachricht-----
Von: m0ore@...
Gesendet: 26.01.2021 16:56 Uhr
An: qrplabs@groups.io
Betreff: Re: [QRPLabs] U3S fw 3.12 no heartbeat no cal

Stick on 10 10 until you get it working, tweak the timing later, but keep to even numbers. 10 12 works fine for me.

Thank you for your answer.

 

I have set FRAME START to 00 10 .  Than came ERROR : 0 (FRAME START)

 

What should i do ?

-----ursprüngliche Nachricht-----
Von: rcarr@...
Gesendet: 26.01.2021 15:30 Uhr
An: qrplabs@groups.io
Betreff: Re: [QRPLabs] U3S fw 3.12 no heartbeat no cal

Frame at 10 10 looks suspicious.   Try a start time of zero and frame 10 to see if that works.

-----ursprüngliche Nachricht Ende-----

-----ursprüngliche Nachricht Ende-----

Hi Sebo,
No heartbeat = no 1PPS signal so CAL cannot work. Is your QLG1 gps 1PPS LED flashing?

If yes, then check 1PPS and DATA lines to U3S are correct.

Set gps info check to 0 0.

73 Ken G4apb 

1PPS Signal is there. After a while the time is the same like the clock.

But there is no heartbeat an Cal is even there.

 

When sending 10.140.200 the real transmitting frequency is 10.101.780 Mhz.

 

What is going wrong ?

 

73 Sebo

 

 

Hi Sebo,
no heartbeat means u3s not seeing 1PPS signal used in CAL. No CAL means tx frequency will be in error. You need to trace 1PPS signal is getting to u3s and find bad connection.

Do not run clock and u3s from same qlg1 at the same time.
73 Ken g4apb 

Check if the 1PPS 2ignal gets through the MCU at pin 28. Maybe it is just a wiring issue between the GPS module and the main board assembly.
A oscilloscope or even a simple analog voltmeter can be used for this.
73 de Jakob, AA0JR

1PPS Signal is there at the mcu. Connecting the QLG only to the clock its allright. Connecting the QLG to the Ultimate 3, there is nothing. 1PPS ant DATA are at the MCU.

 

I decided to flash the mcu.

 

I have the firmware downloaded and i have a isp programmer.

 

Which software ca i use to get the firmware on the chip ?

 

73 Sebo, de DL7LE

Before I did a reflash, I would try a system reset ( see page 41 in operation instructions).

Ur reference frequency is a tad high?
27.104?.
27.004.500 would be closer, maybe its a typo....

The 1PPS is not used in the clock other than to flash the heartbeat, purely a visual thing, you can edit the line to get rid of it.

Do you get the longitude on the clock?

Is the clock and GPS units in same box and U3S in another box?

Are you using sending the NEMA data and the 1PPS on the same cable from the clock / GPS  to the U3S?

When connecting the GPS to the Clock there is a longitude and a heartbeat.

Connecting the GPS to The beacon there is nothing. no GPS data like longitude or a heartbeat.

I have tried out different settings in ref freq.

I have tried out several settings and spend much time but there is no success. I have resetet it 3 times. It is asif the beacon dont recognize there is a gps connected. But i measured the same signals at the mcu as at the connector .

So i had the idea to reflsh the atmega.

But i have no idea what a program can write the hex file to the atmega. i have a usb isp cable towrite the chip when is in the beacon an the beacon is turned on and the lpf board is disconnected.

73

Sorry i forgot im using an external antenna. the gps board is lying outside the box.

But i have no idea what a program can write the hex file to the atmega. i have a usb isp cable towrite the chip

This is my way. https://sites.google.com/site/g4zfqradio/qrplabs_program_chip_with_USBasp
There is lots of information in the Files section of this group.

73 Alan G4ZFQ

Can I assume that "The beacon" is the U3S?

Until you see the heartbeat and Long / Lat data on the display, you will not see any calibration taking place.

The heartbeat and NEMA data ( Lat / long / date / time / Alt) are all set to show on alternating lines on the display and I don't think the display lines can be changed by the user. ( I may be wrong in this but others will confirm) What are you seeing on the U3S display?

When the U3S is first powered on, after the initial splash screen showing the version number, the heartbeat and NEMA data will appear. If it doesn't then either the data is not reaching the processor or the processor is damaged. It is strange that both 1PPS and NEMA data are missingTo get the calibration to take place, the default setting of Cal(Step Time ) must be changed. page 15/16 of the handbook refers but I suspect you have done this. As I said before, the first step is to get the display showing heartbeat and data.