Products > Test Equipment
Hantek HDG2002B AWG: 5Mhz or 100MHz? Let's see!
tinhead:
--- Quote from: RFasic on May 18, 2014, 11:49:41 pm ---You will find some SA screenshots as follows:
...
With such a design I cannot belive that HANTEK can release more than the HDG2032B model to his resellers !!
--- End quote ---
oh well, we don't know how the hardware really looks like on HDG2102B. Sure, DAC/FPGA/SoC/PSU are the same,
but the important filter part might be different (i really hope it is different ..., and if not, well we will do something about)
On the other side, look their specs (and this are "typical" values)
Harmonic Distortion = 10MHz-100MHz: <-50dBc
Spurious signal (non-hormonic) = >10MHz <-65dBc+6dB/spectrum phase
So i'm not expecting wonder on a real HDG2102B. Too bad that you haven't made any measurments on unmodified unit,
something like 20MHz sine before and after (to see if software modification have any influence on signal quality).
idpromnut:
--- Quote from: tinhead on May 19, 2014, 11:57:44 am ---
--- Quote from: RFasic on May 18, 2014, 11:49:41 pm ---You will find some SA screenshots as follows:
...
With such a design I cannot belive that HANTEK can release more than the HDG2032B model to his resellers !!
--- End quote ---
oh well, we don't know how the hardware really looks like on HDG2102B. Sure, DAC/FPGA/SoC/PSU are the same,
but the important filter part might be different (i really hope it is different ..., and if not, well we will do something about)
On the other side, look their specs (and this are "typical" values)
Harmonic Distortion = 10MHz-100MHz: <-50dBc
Spurious signal (non-hormonic) = >10MHz <-65dBc+6dB/spectrum phase
So i'm not expecting wonder on a real HDG2102B. Too bad that you haven't made any measurments on unmodified unit,
something like 20MHz sine before and after (to see if software modification have any influence on signal quality).
--- End quote ---
Should be easy enough to do.. just rename the backup of the config file ;) I can try and get a screen shot or two.
RFasic:
@ idpromnut:
--- Quote from: idpromnut on May 19, 2014, 11:24:08 am ---
--- Quote from: _Sync_ on May 18, 2014, 09:30:46 am ---Yeah I also noticed the glitching with fast sines, I wonder what that is about...
Did you also look at the noise mode? From what I have measured it does not look that random at all...
--- End quote ---
I discovered the source of the glitches at higher frequencies: the external reference seems to be causing it, regardless of how clean or dirty the reference is. I had been using my Rb few standard, but reran a couple of the 90+ MHz tests with the internal reference and no more spurious glitches! Can someone confirm this behaviour with the external reference?
--- End quote ---
I intended to do the same next day ... so you will get your answer (I am also using an external 10MHz Rubidium souce) later (more later ..) in the evening.
@ Tinhead:
--- Quote from: idpromnut on May 19, 2014, 12:15:18 pm ---
--- Quote from: tinhead on May 19, 2014, 11:57:44 am ---
--- Quote from: RFasic on May 18, 2014, 11:49:41 pm ---You will find some SA screenshots as follows:
...
With such a design I cannot belive that HANTEK can release more than the HDG2032B model to his resellers !!
--- End quote ---
oh well, we don't know how the hardware really looks like on HDG2102B. Sure, DAC/FPGA/SoC/PSU are the same,
but the important filter part might be different (i really hope it is different ..., and if not, well we will do something about)
On the other side, look their specs (and this are "typical" values)
Harmonic Distortion = 10MHz-100MHz: <-50dBc
Spurious signal (non-hormonic) = >10MHz <-65dBc+6dB/spectrum phase
So i'm not expecting wonder on a real HDG2102B. Too bad that you haven't made any measurments on unmodified unit,
something like 20MHz sine before and after (to see if software modification have any influence on signal quality).
--- End quote ---
Should be easy enough to do.. just rename the backup of the config file ;) I can try and get a screen shot or two.
--- End quote ---
I will go back to initial setting (HDG2022B) tonight and will post the resulting screenshots ..
@ Fremen67 or Tinhead
The inverted positionning of the TN LCD display is very VERY annoying when the HDG is used on a desk: did you find a way to correct this, as the EEPROM "setting" method seems not to be used anymore in this device (no I2C.log ....)
I think this could be usefull for many people as it is easy to physically rotate the LCD (the lenght of flat ribbon seems to be sufficient for both configurations).
idpromnut:
--- Quote from: RFasic on May 19, 2014, 12:42:35 pm ---I intended to do the same next day ... so you will get your answer (I am also using an external 10MHz Rubidium souce) later (more later ..) in the evening.
--- End quote ---
Mine is a DYI FE5680-based standard, so I am not quite convinced of the spectral purity of the output (although when I 'scoped the output signal, it seemed reasonably clean: no spurious signals or anything like that).
tinhead:
--- Quote from: RFasic on May 19, 2014, 12:42:35 pm ---The inverted positionning of the TN LCD display is very VERY annoying when the HDG is used on a desk: did you find a way to correct this, as the EEPROM "setting" method seems not to be used anymore in this device (no I2C.log ....)
I think this could be usefull for many people as it is easy to physically rotate the LCD (the lenght of flat ribbon seems to be sufficient for both configurations).
--- End quote ---
it is actully funny, you can't use lot of todays gears when then in-line with your eyes (or above). Hantek is here very conservative,
all their gears can be perfectly use like that (and i was always happy about, i don't have tons of place on desk, i like all my gear to have above it). Of course for people who have them all on their desk directly it sucks (are there any? i thought only maketing ppl have gears on desk directly, an EE have neverenought space for that). So if you really have need to place it directly on desk, then use that two feets on bottom side and move your gear 60-80cm away from you. Sure, you (maybe) can rotate the physical display to get "view angle for use on desk", but then you have to resolder i think two resistors on display itself to rotate the displayed information as well (check the datasheet, i think it is still Innolux AT070TN83).
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