I was trying to start a cal but when I follow the instructions on the manual they do not match well at all
I checked if anyone had posted a better description of the calibration procedure but do not see one.
Would anyone be willing to post the process and maybe some reference as to what to expect.
As I do understand the first 9 tests are DC values and I can use my meter to read those out. I did start that and set the meter to run an average and I let it run until it gave a steady value (about 500 samples, I am using a DM3058E) and it seemed I had to input the value, press value then next to go to the next one which didn't agree with the manual.
Yes that's almost it. When you are in the calibration menu:
1 - Select CH1 or CH2 with F1
2 - Press F2 to start
3 - Press F2 again (Next) to start with the 1 st value
4 - Measure the value, enter it and push F3 (Value) to validate the value
5 - repeat step 3&4 till the last value (90 values
)
6 - Press F4 save and you are done
With SW 1.00.3 the calibration output values seems to have changed. It seems that the HDG outputs now only the maximum values for each range.
The 12 first values are DC values so you just need to use your DMM (I used my Metrix MX54C and waited some seconds for each value so that it stopped changing. Your DM3058E seems more than enough accurate for that
)
The DC values seem to be now:
- 2 times the min&max Voltage with x1 gain
- 2 times the min&max Voltage with x4 gain (only the x4 amplification stage)
- 2 times the min&max Voltage with x20 gain (the 2 amplification stages in serial, x4 & x5)
For example I had 0,5781 -0,5805 0,5782 -0,5806 2,2476 -2,2664 2,2478 -2,2671 11,145 -11,259 11,145 -11,262 V
For the last 78 values you will need a scope as the signal is a sine wave at different frequencies with the maximum output for the 3 ranges (I connected directly the probe with an adapter on the HDG output).
The 26 frequencies are 0,5 1 2 5 6 10 12 18 21 25 26 30 35 40 46 50 51 55 56 60 62 68 72 78 85 90 Mhz
You have to enter the Vpp value for each frequency (so in my case 27x values starting at 1.16V, 27x values starting at 4.5V and 27 values starting at 22.5V). I used for that the average acquisition mode of the scope, waiting some seconds between each value so that it stopped changing).
@fremen67 what would be your thought on downgrading to the 1.02 version and testing under it?
next would be do you have a copy of it and how to install it? Only if you think its worth a try though
If you still have self test issues after the calibration process, it could be worth trying with sw 1.00.2.
You will just need to keep your FPGA 30 configuration file because of your PCB 1004.1.
If you want to do it, just tell me and I will send you a custom 1.00.2 file plus another one to go back to 1.00.3 after the test.
There are several ways of doing the downgrade, depending on the tools you have. The easiest way for you would be that I provide you with an .upk "upgrade" file that your HDG could directly use (2 in fact, one to downgrade to 1.00.2 + one to upgrade back to 1.00.3).
The second way would be to do it from u-boot (via the serial console and a PC connected on the USB port of the HDG).
You can also do it via JTAG with OpenOCD (very slow) or H-Jtag (much better but you need Windows XP or Win7 32bits when using a Wiggler JTAG device).
Anyway I will try to package an upgrade file so that others having 1.00.2 can also upgrade to 1.00.3.
I wonder when Hantek will start posting official upgrade files on their site ...