Products > Test Equipment
FeelTech FY6600 60MHz 2-Ch VCO Function Arbitrary Waveform Signal Generator
fremen67:
--- Quote from: soundtec on October 02, 2019, 01:27:48 am ---Theres a question that came up before about the software catching up to changes via the front panel , V0.7 had the update button , would it be possible for the FP to be programmed to send an equivalent update signal to the pc everytime a value had been altered locally , it would make sure two remotely located opperators are reading the same true values from the instrument at all times .
--- End quote ---
The refresh button is always there but moved to the configuration tab.
Synchronization is indeed an interresting subject.
The communication protocol is defined in a way that the FP only answers to external requests. This simplifies the protocol handling as from the PC side, your are only listening to the COM port after having sent a request. If you receive unsolicited data when waiting for a specific answer this would lead to false com errors, unless adding complexity to the protocol.
But yes the FP could have a flag available that the PC would read indicating that something that is interresting for the PC has changed.
Something that changes in the FP is not necessarily interesting for the PC (depending on the tab you are viewing, some changes may be relevant, others not), so that means extra coding in the FP. That also means extra load on the communication, extra load on the FP CPU.
The effort might not be worth the result. That is why I ended with the refresh button.
You are talkink about "two remotely located opperators" but in the real life I guess this would be you and yourself ;)
Before releasing the 0.8 PC software I was about to remove definitely the refresh button and replace it with a refresh on tab change. It is already the case for the calibration parameters or the configuration parameters that are read when you open the corresponding tab. If you want to force a refresh, you would change tab and come back. I think this is what I will finally do in the next release.
fremen67:
--- Quote from: soundtec on October 02, 2019, 12:13:52 pm ---One thing Ive noticed on the unit with the flashed Fp code was what seems to be the sine displays corrupted both on the FP display and in software ,I'll have a closer look this afternoon .
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The corrupted sine bug is always present in the FY6600. I had it also with the new front panel so I think it might be in the FPGA code.
This is the sine wave itself in the flash eeprom that looses some points for whatever reason. It happened to me once and I just reflashed the eeprom. If your sine wave is really broken and if you don't have a way to flash the eeprom, I will add a function to the PC Software to refresh it.
The best way to know is to connect your FY6600 to a scope.
Miti:
--- Quote from: fremen67 on October 01, 2019, 11:14:08 pm ---Find attached a sine wave created with the modified PC Software 0.8.
This is the original FT format.
You can download it to a standard FY6600 or a modified FY6600 with PC Software 0.8.
--- End quote ---
Thanks fremen67! So the secret was to rename it to .FY.
Just for fun, I made a DCF77 out of the FY6600. I have a radio controlled wall clock from when I was an European citizen.
Sure it doesn't sync in Canada so I wanted to play a bit.
I prepared an arbitrary waveform according to the DCF77 specs and I modulate a 77.5 carrier on CH1 with the arbitrary wave from CH2.
It works like a charm. I haven't seen that solid antenna sign in a looooong time. It tries to sync every ten minutes before the hour and then it gives up.
I'm thinking of making a transmitter that has a GPS receiver as a precision clock.
DaveR:
Hi Miti - would you mind posting that Ch2 waveform you made? I've got a weather station that hasn't been able to get a time fix from DCF77 for years, and it should help me do a quick diagnosis as to whether it's a receiver fault or just an antenna problem. It will save me having to do a manual time correction every three months if I can fix it :).
Regards,
Dave
Miti:
--- Quote from: DaveR on October 04, 2019, 07:48:44 pm ---Hi Miti - would you mind posting that Ch2 waveform you made? I've got a weather station that hasn't been able to get a time fix from DCF77 for years, and it should help me do a quick diagnosis as to whether it's a receiver fault or just an antenna problem. It will save me having to do a manual time correction every three months if I can fix it :).
Regards,
Dave
--- End quote ---
I should have done it two days ago. I've attached it in the original post.
CH1 77.5KHz, 10V, CH2 3.66mHz (yes, mili Hz), 1V, MOD AM, Source CH2 with the arbitrary waveform, Mod-Rate 180%. You can try ASK as well.
Edit: ASK doesn't work, you may need different levels.
Edit1: It starts with 20:50 CEST Wed 02 Oct 2019 and it goes up to 20:53. It starts 20:54 but doesn't finish it.
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