For an external source, the depth of AM is controlled by the voltage level of
the connector connected to the [Modulation In]. ±6V corresponds to the
currently set depth 100%.
Hello. I'm looking for some information about max Vpp of 10MHz ext signal. I tried to find in in all PDF files provided for SDG1025 but failed.
What I found is only max voltage information of AM ext modulation.
If my ref 10MHz signal is at 1.5 Vtop level should I convert it to TTL/CMOS level for Siglent?QuoteFor an external source, the depth of AM is controlled by the voltage level of
the connector connected to the [Modulation In]. ±6V corresponds to the
currently set depth 100%.
2nd question related: Is there any factory voltage standard for 10MHz reference signal?
Edit: http://digital.ni.com/public.nsf/allkb/FA7810B075EF6A9F86256E5300616E51
Hello. I'm looking for some information about max Vpp of 10MHz ext signal. I tried to find in in all PDF files provided for SDG1025 but failed.
What I found is only max voltage information of AM ext modulation.
If my ref 10MHz signal is at 1.5 Vtop level should I convert it to TTL/CMOS level for Siglent?QuoteFor an external source, the depth of AM is controlled by the voltage level of
the connector connected to the [Modulation In]. ±6V corresponds to the
currently set depth 100%.
2nd question related: Is there any factory voltage standard for 10MHz reference signal?
Edit: http://digital.ni.com/public.nsf/allkb/FA7810B075EF6A9F86256E5300616E51
There is the data about max Voltage of 10MHz External trigger input signal:(For SDG1000)
Refence Frequency Input
Voltage level 5Vpp--5.5Vpp
Frequency range 10MHz±1kHz
Input impedance ?5k?.AC coupling
If you need higher clock accuracy without using an external 10MHz source, you can pretty easily modify the SDG1025 to use an internal 25MHz TCXO.
It just makes it easier to solder components in a multi-layer board especially if you have a low power iron. If you have a 80W iron it shouldn't be a problem unless the thermal reliefs are absent.
It just makes it easier to solder components in a multi-layer board especially if you have a low power iron. If you have a 80W iron it shouldn't be a problem unless the thermal reliefs are absent.
It just makes it easier to solder components in a multi-layer board especially if you have a low power iron. If you have a 80W iron it shouldn't be a problem unless the thermal reliefs are absent.
Ah, I see. I have a hot air station, so maybe I'll do that.
Now the only questions are whether or not to bother with it (I suppose more precision is always nice) and where to get the TCXO. The ebay listing mentioned in the video isn't there anymore. EBay has lots of 3.3V TCXOs, but a scarcity of 5V ones.
Now the only questions are whether or not to bother with it (I suppose more precision is always nice) and where to get the TCXO. The ebay listing mentioned in the video isn't there anymore. EBay has lots of 3.3V TCXOs, but a scarcity of 5V ones.
I'll bet that this one will work fine: http://www.ebay.com/itm/1pcs-TCXO-0-1ppm-25-000MHz-25MHZ-Ultra-precision-Gold-Oscillator-FOR-audio-DIY-/131649190505?hash=item1ea6e73a69:g:uFgAAOSwQItUF9Lw
I saw that one. I wish it had a part number and a datasheet that would lend some legitimacy to it. The most I could find was a thread on another forum speculating that it's another manufacturer's part that's been gold-plated and remarked, and sold at a premium to unsuspecting audiophiles (some of whom will buy anything so long as it's gold). I'm not sure if that's true or not, but this part makes me suspicious.
How about from here: http://www.aliexpress.com/item/ONE-PIECE-PRECISION-0-3ppm-25MHz-25-000MHz-25M-DIP-TCXO-Support-bulk-orders/32297054283.html .
This looks identical to the one I bought (says M.D.D on it)
I am perhaps going to show a bit of noob ignorance here, but reading through the SDG1000 service manual, I don't see where a frequency calibration is performed. Or rather how the unit might be calibrated by a high accuracy/precision 10 MHz source, like my GPSDO. Can someone clue me in? Thanks.
I am perhaps going to show a bit of noob ignorance here, but reading through the SDG1000 service manual, I don't see where a frequency calibration is performed. Or rather how the unit might be calibrated by a high accuracy/precision 10 MHz source, like my GPSDO. Can someone clue me in? Thanks.
Accuracy Within 90daysv±50 ppm within 1 year ±100 ppm 18°C ~ 28°C
Temperature coefficient <5 ppm/°C