| Electronics > Beginners |
| Siglent SDG-2042x 10Mhz reference signal is bad |
| << < (3/6) > >> |
| 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 |
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