need help whit digilite 5.9
need help whit digilite 5.9
hello,
I need help with my digilite v5.9.
this not transmitted.
All voltages are correct.
the communication with the port right.
the LED blinks twice with pc. the Blast sd is not recognized when connected, and the LED keeps blinking twice.
Only carrier on the frequency analyzer, not existing digital transmission.
Could be the dsPIC33 flashed bad?
what other item can be wrong?
thanks
I need help with my digilite v5.9.
this not transmitted.
All voltages are correct.
the communication with the port right.
the LED blinks twice with pc. the Blast sd is not recognized when connected, and the LED keeps blinking twice.
Only carrier on the frequency analyzer, not existing digital transmission.
Could be the dsPIC33 flashed bad?
what other item can be wrong?
thanks
Re: need help whit digilite 5.9
Hi,
There should be some modulation, even if the PC is not connected and the SD card is not connected. Can you see any waveforms on the inductors in the filters, LF1 and LF3?
Which program do you use on the PC - GBPVR or WinTV?
Which PC software versions are you using - v1.40 or v2.50?
Which dsPIC version are you using?
Brian
There should be some modulation, even if the PC is not connected and the SD card is not connected. Can you see any waveforms on the inductors in the filters, LF1 and LF3?
Which program do you use on the PC - GBPVR or WinTV?
Which PC software versions are you using - v1.40 or v2.50?
Which dsPIC version are you using?
Brian
Re: need help whit digilite 5.9
hello brian
yes, I have square wave in L1 and L3 until the modulator.
I use WinTV and PC Software v2.50
Also, I have the dsPIC33fj128gp that I bought at BATC.
I will continue investigating
thanks
yes, I have square wave in L1 and L3 until the modulator.
I use WinTV and PC Software v2.50
Also, I have the dsPIC33fj128gp that I bought at BATC.
I will continue investigating
thanks
Re: need help whit digilite 5.9
If you select a test mode in DigiLite Config, that should make the LED blink 6 times. DigiLite Transmit must be running, but WinTv does not need to be recording.
That is the easiest way to test the communication between the PC and the DigiLite pcb.
Brian
That is the easiest way to test the communication between the PC and the DigiLite pcb.
Brian
Re: need help whit digilite 5.9
How can I selecting the test mode in DigiLite Config
Re: need help whit digilite 5.9
The option in blue.
Brian
Brian
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Re: need help whit digilite 5.9
The communication between the pc and the pcb is correct. The LED blinks 6 times.
than anything else I can check?
thanks
than anything else I can check?
thanks
Re: need help whit digilite 5.9
Can you make a recording with WinTV and run DigiLite Transmit so that the LED blinks twice.
If yes, then the problem may be in the modulator part of the pcb.
Do you have a spectrum analyser?
Brian
If yes, then the problem may be in the modulator part of the pcb.
Do you have a spectrum analyser?
Brian
Re: need help whit digilite 5.9
yes, I have a spectrum analyser.
i have observed in the osciloscope that i have digital output signal pins 18 and 22 for "Q" and also on pins 21 and 23 for "I" when I have not connected the USB and SD card, it is correct?
Also when i have not connected the USB ans SD card, I have a digital modulation in the spectrum analyser. it is correct?
and, other question that i have, when i begin to send packet PC to PCB, i don't see output packet in the PC screen. it is correct?
thanks
i have observed in the osciloscope that i have digital output signal pins 18 and 22 for "Q" and also on pins 21 and 23 for "I" when I have not connected the USB and SD card, it is correct?
Also when i have not connected the USB ans SD card, I have a digital modulation in the spectrum analyser. it is correct?
and, other question that i have, when i begin to send packet PC to PCB, i don't see output packet in the PC screen. it is correct?
thanks
Re: need help whit digilite 5.9
Select the In-Phase test mode. There should be a square wave at the inputs to the Nyquist filters, LF1 and LF3
Look for a 2 volt peak to peak sine wave signals at IC3 pin 1 and pin 7. They should swing from about 1.4 volts to 3.4 volts.
If there is no signal out of the Nyquist filter and you used surface mount inductors check to see if they are shorted to the traces that run between the pads.
The signals at the modulator IC4 will one half the voltage of the signals at IC3 pin 1 and 7. Check pins 1,2,15,16.
Good Luck
Look for a 2 volt peak to peak sine wave signals at IC3 pin 1 and pin 7. They should swing from about 1.4 volts to 3.4 volts.
If there is no signal out of the Nyquist filter and you used surface mount inductors check to see if they are shorted to the traces that run between the pads.
The signals at the modulator IC4 will one half the voltage of the signals at IC3 pin 1 and 7. Check pins 1,2,15,16.
Good Luck