Tag: hack

Siglent SDG2042X liberation

Holy megacycles Batman! This thing is made for hacking. You telnet into the thing, delete one line in an XML config file, and then reboot. Whiskey-Tango-Foxtrot!?

Here's how the screen looks before and after, and a view of the 120 MHz signal on the scope. There's a bit of amplitude ripple as you sweep up from around 50 MHz.

Rigol DS2072A upgrade

Short notes on Rigol DS2072A upgrade following bineteri's step-by-step post.

  1. Use Rigol Bildschirmkopie LAN/USB for making a memory dump over LAN/SCPI: ":SYST:UTIL:READ? 1,33554432"  this results in a 32 Mb memory dump saved as "DS2072A.bin"
  2. Use rigup 0.4 in two stages to generate keys:
    1. "rigup scan DS2072A.bin > EC-keys.txt"
    2. "rigup DS2072A DS2072A.bin > Options.txt"
  3. Read Options.txt and install the wanted key over SCPI: ":SYST:OPT:INSTALL A_KEY_FROM_OPTIONS_WITHOUT_DASHES"

Frequency response before and after:

rigol_DS2072A_upgrade

Python code for plot:

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import matplotlib.pyplot as plt
import math
 
# rigol ds2072a frequency response test
# AW2015-12-28
 
bf=[10, 20, 40, 60, 70, 80, 100, 130, 160, 200, 250, 300, 400, 500, 600, 700, 800, 900, 1000]
before=[1008, 992, 944, 880, 848, 808, 728, 624, 560, 456, 396, 332, 224, 100, 25, 18, 1.5, 1, 1]
 
af=[10, 20, 40, 60, 70, 80, 100, 130, 160, 200, 250, 300, 350, 400, 450, 500, 550, 600, 700, 800, 900, 1000 ]
after=[1000, 984, 984, 984, 992, 976, 976, 944, 928, 904, 888, 856, 760, 656, 556, 308, 20, 30, 40, 1, 1.5, 2]
 
# for comparison RC-filter response for 70MHz and 300MHz
rc70 = [ 1000.0 / math.sqrt( 1+ pow( f/70.0, 2 ) ) for f in bf]
rc300 = [ 1000.0 / math.sqrt( 1+ pow( f/300.0, 2 ) ) for f in bf]
 
plt.figure()
plt.loglog(bf, before,'b',label='Before')
plt.loglog(bf, rc70 ,'b--',label='70 MHz RC-filter response')
 
plt.loglog(af, after,'r',label='After')
plt.loglog(bf, rc300,'r--',label='300 MHz RC-filter response')
 
 
plt.title('Rigol DS2072A update, AW2015-12-28\nSignal generator: HP8647A (+3.8 dBm) into CH1 50 Ohm DC-coupled')
 
plt.ylabel('CH1 Vpp (mV)')
plt.xlabel('Frequency (MHz)')
plt.grid(True, which="both")
plt.ylim((1,1100))
plt.legend(framealpha=0.6, loc='lower left')
plt.show()