Products > Test Equipment
DG4000 - a firmware investigation
Rigol-Friend:
Hello to all,
I got arround the same plot on DSA815 like PeDre (before calibrating) as I sweeped up to 200 Mhz.
Sorry, but I don't understand the calibration procedure. I'm not an expert :( and my english is poor also.
For example: I find ID1 HFLAT-1-1 (Meas Val) 11.8650 dBm. Ok, I can enter a new value now, but which value?
And what meens HFLAT-x-x ? Is it corresponding with a frequency or frequency-range?
Thank you for help
Rigol-Friend
Rigol-Friend:
@Pedre
Thank you for your fast answer, I will try it after dinner. :D
Rigol-Friend:
Very good, PeDre, it works fine, thank you.
I have an output difference between 10 Khz and 200 Mhz of maximum arround 0.5dB. I measured this with DSA815 and Rohde&Schwarz URV35 with URY Z2 Detector. I adjusted the frequencies by hand.
But not so in sweep-function. Adjusted 0dBm of DG4202 produces arround 5dBm until 100Mhz and higher the output falls down till 0dBm at 200Mhz.
Rigol-Friend
ted572:
DG4062 to DG4202 Internal Calibration Info provided at the following:
Sniffing the Rigol's internal I2C bus, Post #1785, https://www.eevblog.com/forum/testgear/sniffing-the-rigol%27s-internal-i2c-bus/msg344008/#msg344008
ted572:
--- Quote from: Teneyes on December 09, 2013, 05:51:07 am ---Does anyone else observe this? (FW=1.04)
When doing a sweep (6 sec ) from 100 ->160 MHz that the output is mostly Flat
about 1 Vpp , see Pix 1
But when the sweep is set to 100 ->161 MHz
the out jumps to 1.42 Vpp (@100MHz) and the sweep looks like Pix 2
Note At the end of the sweep the output is at 1 Vpp (60sec end Hold)
see Pix 3
Is this a FW issue, a limit, a bug, or a Calibration error ?
--- End quote ---
Can you try to do the Calibration Restoration for everything else except for 'Freq. Accuracy' and 'Counter' to see if that fixes the Sweep Freq Response?
It would also be nice to know what this looks like on an original (as received) DS4162. Maybe someone can comment that has one of them.
Thanks, Ted
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