Electronics > Beginners
Siglent SDG-2042x 10Mhz reference signal is bad
john95:
do you have Mac or Linux version of RFCALC? or even web based? I have not used window machine for ages.
john95:
if the actual voltage reaching radio is half of what I thought. It means the power reaching HAM radio is 6 dbm (20 * log(2)) lower. it matches perfectly to the theoretical predication. Thanks. I will set to 50 ohm and retest.
radiolistener:
--- Quote from: john95 on May 16, 2019, 07:38:44 pm ---do you have Mac or Linux version of RFCALC? or even web based? I have not used window machine for ages.
--- End quote ---
it is written in C# and should run on Mac or Linux with no issues under mono.
Just install mono runtime and run it with command line:
--- Code: ---mono RFCALC.exe
--- End code ---
PS: be careful with transceiver, if you randomly press TX button on your transceiver, you can burn-out your sig gen output... ;)
john95:
correct. I should be very very careful.
1) if I transmit from my HAM radio, it damages SDG.
2) if I accidentally output more power from SDG, I burn up HAM radio.
I should test as less as possible on this setup as the potential damage is severe. especially not after couple of drinks.
If proven correct because of this HiZ issue, I will be extremely happy that I worked out formula from basic assumption.
radiolistener:
Here is some values from RFCALC:
2 mVpp = -50 dBm = S9 + 23 dB
5 mVpp = -42.04 dBm = S9 + 30.96 dB
15 mVpp = -32.5 dBm = S9 + 40 dB
45 mVpp = -22.96 dBm = S9 + 50 dB
142 mVpp = -12.98 dBm = S9 + 60 dB
448 mVpp = -2.995 dBm = S9 + 70 dB
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version