[time-nuts] Documents
Hi, Did you receive the Documents which I have sent earlier? If not, I have re-uploaded them on my Google drive. Click Here https://googledrive.com/host/0B6EMS-qB9qNxUXFWOFlXUUJHRU0, I will upload rest of the documents soon. Regards -- -- __ Ray Xu http://www.utdallas.edu/~rxx110130 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] STEL 1175 vice 1173
Hi, I found two PLCC STEL 1175 in a rack mounted synthesizer I have. I'd be willing to sell the chips. Would they work? Cheers, Corby ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] STEL 1175 vice 1173
Hello, I think that not as a direct replacement of the 1173. The 1175 has 32-bit phase increment resolution and 10-bit DAC output. The 1173 has 48/12 bit. Regards, Javier On 14/05/2014 17:13, cdel...@juno.com wrote: Hi, I found two PLCC STEL 1175 in a rack mounted synthesizer I have. I'd be willing to sell the chips. Would they work? Cheers, Corby ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] STEL 1175 vice 1173
Hi Corby, Thanks very much for the offer, but it looks like it would still be a big project to use an '1175 to replace an '1173. I think I'll have to pass. The package difference (PLCC68 vs. PLCC44) would still require a daughterboard of some sort. I've learned a little over the past week about NCOs and, if I'm right, reducing the clock speed from 45 MHz to 30 MHz would partially compensate for the 32 vs. 48 bit difference. The output frequency would be correct, but the waveform would have more harmonics. Since the clock is derived from a 90 MHz signal, the reduction would be easy. Whether that would have an adverse impact on the operation of the Datum 4065A is way beyond me. It looks like both chips have a 12 bit output which is nice. The '1175 has more features than the '1173. I'd have to study the data sheet to see if they can be configured to make the '1175 act like an '1173. For now, the plan is to try and source the '1173 in the 48-pin DIP package and do a (relatively) simple daughterboard to adapt the packages. Even that will probably end up costing ~$150. If that doesn't work out, there's the possibility of an FPGA replacement. That would likely allow replacing the AD9713 D/A converter as well as the STEL-1173. It turns out that an NCO is a standard application in the FPGA world. Ed On 5/14/2014 9:13 AM, cdel...@juno.com wrote: Hi, I found two PLCC STEL 1175 in a rack mounted synthesizer I have. I'd be willing to sell the chips. Would they work? Cheers, Corby ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] STEL 1175 vice 1173
Hi Ed, You could probably use a 32 bit DDS, but there will be a whole bunch of little trimmings you would have to do in the CPU code which would require quite a bit of (interesting) work. I would say it would be beyond the scope of most folks. Cheers, Magnus On 05/14/2014 06:53 PM, Ed Palmer wrote: Hi Corby, Thanks very much for the offer, but it looks like it would still be a big project to use an '1175 to replace an '1173. I think I'll have to pass. The package difference (PLCC68 vs. PLCC44) would still require a daughterboard of some sort. I've learned a little over the past week about NCOs and, if I'm right, reducing the clock speed from 45 MHz to 30 MHz would partially compensate for the 32 vs. 48 bit difference. The output frequency would be correct, but the waveform would have more harmonics. Since the clock is derived from a 90 MHz signal, the reduction would be easy. Whether that would have an adverse impact on the operation of the Datum 4065A is way beyond me. It looks like both chips have a 12 bit output which is nice. The '1175 has more features than the '1173. I'd have to study the data sheet to see if they can be configured to make the '1175 act like an '1173. For now, the plan is to try and source the '1173 in the 48-pin DIP package and do a (relatively) simple daughterboard to adapt the packages. Even that will probably end up costing ~$150. If that doesn't work out, there's the possibility of an FPGA replacement. That would likely allow replacing the AD9713 D/A converter as well as the STEL-1173. It turns out that an NCO is a standard application in the FPGA world. Ed On 5/14/2014 9:13 AM, cdel...@juno.com wrote: Hi, I found two PLCC STEL 1175 in a rack mounted synthesizer I have. I'd be willing to sell the chips. Would they work? Cheers, Corby ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] STEL 1175 vice 1173
Hi Magnus, Yeah, I like a challenge, but let's keep things reasonable! :) The package conversion is easy to accomplish, the FPGA would be a real stretch for me, but reverse engineering the system code is more than I want to tackle - although I have thought about it! Ed On 5/14/2014 11:17 AM, Magnus Danielson wrote: Hi Ed, You could probably use a 32 bit DDS, but there will be a whole bunch of little trimmings you would have to do in the CPU code which would require quite a bit of (interesting) work. I would say it would be beyond the scope of most folks. Cheers, Magnus On 05/14/2014 06:53 PM, Ed Palmer wrote: Hi Corby, Thanks very much for the offer, but it looks like it would still be a big project to use an '1175 to replace an '1173. I think I'll have to pass. The package difference (PLCC68 vs. PLCC44) would still require a daughterboard of some sort. I've learned a little over the past week about NCOs and, if I'm right, reducing the clock speed from 45 MHz to 30 MHz would partially compensate for the 32 vs. 48 bit difference. The output frequency would be correct, but the waveform would have more harmonics. Since the clock is derived from a 90 MHz signal, the reduction would be easy. Whether that would have an adverse impact on the operation of the Datum 4065A is way beyond me. It looks like both chips have a 12 bit output which is nice. The '1175 has more features than the '1173. I'd have to study the data sheet to see if they can be configured to make the '1175 act like an '1173. For now, the plan is to try and source the '1173 in the 48-pin DIP package and do a (relatively) simple daughterboard to adapt the packages. Even that will probably end up costing ~$150. If that doesn't work out, there's the possibility of an FPGA replacement. That would likely allow replacing the AD9713 D/A converter as well as the STEL-1173. It turns out that an NCO is a standard application in the FPGA world. Ed On 5/14/2014 9:13 AM, cdel...@juno.com wrote: Hi, I found two PLCC STEL 1175 in a rack mounted synthesizer I have. I'd be willing to sell the chips. Would they work? Cheers, Corby ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] STEL 1175 vice 1173
Hi Ed, Reverse-engineering it would be fun. It's not that much code. Anyone got a EPROM dump lying around? :) But regardless, just doing reverse engineering is not enough, one needs to adjust frequency programming and possibly adjust some other parameters. Reverse-engineering as such would be educational. Cheers, Magnus On 05/14/2014 08:11 PM, Ed Palmer wrote: Hi Magnus, Yeah, I like a challenge, but let's keep things reasonable! :) The package conversion is easy to accomplish, the FPGA would be a real stretch for me, but reverse engineering the system code is more than I want to tackle - although I have thought about it! Ed On 5/14/2014 11:17 AM, Magnus Danielson wrote: Hi Ed, You could probably use a 32 bit DDS, but there will be a whole bunch of little trimmings you would have to do in the CPU code which would require quite a bit of (interesting) work. I would say it would be beyond the scope of most folks. Cheers, Magnus On 05/14/2014 06:53 PM, Ed Palmer wrote: Hi Corby, Thanks very much for the offer, but it looks like it would still be a big project to use an '1175 to replace an '1173. I think I'll have to pass. The package difference (PLCC68 vs. PLCC44) would still require a daughterboard of some sort. I've learned a little over the past week about NCOs and, if I'm right, reducing the clock speed from 45 MHz to 30 MHz would partially compensate for the 32 vs. 48 bit difference. The output frequency would be correct, but the waveform would have more harmonics. Since the clock is derived from a 90 MHz signal, the reduction would be easy. Whether that would have an adverse impact on the operation of the Datum 4065A is way beyond me. It looks like both chips have a 12 bit output which is nice. The '1175 has more features than the '1173. I'd have to study the data sheet to see if they can be configured to make the '1175 act like an '1173. For now, the plan is to try and source the '1173 in the 48-pin DIP package and do a (relatively) simple daughterboard to adapt the packages. Even that will probably end up costing ~$150. If that doesn't work out, there's the possibility of an FPGA replacement. That would likely allow replacing the AD9713 D/A converter as well as the STEL-1173. It turns out that an NCO is a standard application in the FPGA world. Ed On 5/14/2014 9:13 AM, cdel...@juno.com wrote: Hi, I found two PLCC STEL 1175 in a rack mounted synthesizer I have. I'd be willing to sell the chips. Would they work? Cheers, Corby ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] PIC Programmer for Piklab in Linux?
Can anyone suggest a PIC programmer that will work with Piklab on Linux? The replacement serial board I just bought won't drive my JDM Classic PIC programmer. It doesn't reliably drive my LIRC IR transmitter either, so I have to devote the serial port on my motherboard to LIRC. My GPSDO development is stalled until I can get something that works. Bob - AE6RV ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] PIC Programmer for Piklab in Linux?
I neglected to mention that I'm pretty much limited to USB or ethernet (if such a programmer exists) at this point. Bob From: Bob Stewart b...@evoria.net To: Discussion of precise time and frequency measurement time-nuts@febo.com Sent: Wednesday, May 14, 2014 6:15 PM Subject: [time-nuts] PIC Programmer for Piklab in Linux? Can anyone suggest a PIC programmer that will work with Piklab on Linux? The replacement serial board I just bought won't drive my JDM Classic PIC programmer. It doesn't reliably drive my LIRC IR transmitter either, so I have to devote the serial port on my motherboard to LIRC. My GPSDO development is stalled until I can get something that works. Bob - AE6RV ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] PIC Programmer for Piklab in Linux?
I =switched over to USB based development boards a few years back. Must have a mini USB on them and you never even need to think about programming you simply click upload in the text editor. You can get them with ARV, Adruino, ARM and other CPUs. Prices in some cases under $5. I've not had to build a PCB either as these come ready to use. Maybe time to switch. These modern boards have about a 10 minute learning curve. From cutting open the box to first running program. The gadget below has a usb jack, is self programming, connects direct (with only a USB cable) to any Linux/Mac or windows computer. It has about a half dozen analog pins (dac/adc) and a dozen digital pins. eBay's for under $10. If you install 0.1 male header s it drops into a solderless bread board, (there are many things like this.) Stand alone programmers are going to be harder and harder to find as time goes on. On Wed, May 14, 2014 at 4:15 PM, Bob Stewart b...@evoria.net wrote: Can anyone suggest a PIC programmer that will work with Piklab on Linux? The replacement serial board I just bought won't drive my JDM Classic PIC programmer. It doesn't reliably drive my LIRC IR transmitter either, so I have to devote the serial port on my motherboard to LIRC. My GPSDO development is stalled until I can get something that works. Bob - AE6RV ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Chris Albertson Redondo Beach, California ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
