3. I’ve connected TG44 and my function generator (Rigol DG4162, which allows me to set amplitude in dBm from +10 to -50), set both generators to 1MHz and compared output amplitude. I see, that TG44 power -10dBm, -20dbm, -30dBm look correct (+-1dbc error), -40 is -38dBm (a bit higher, but still ok) but 0dBm outputs only -7dBm. On picture yellow line is TG44 output (Vrms =100mV, ~-7dBm), blue line is DG4162 output (Vrms =232mV, close to 0dBm). On -20dB picture both show almost identical Vrms ~22mV. Is it a hardware issue?
4. I see that TG44 generates 10MHz output reference, but it can’t use external (OCXO or GPSDO) reference. It’s looks strange to use external reference in analyzer and not being able to use the same reference in generator.
