Output amplitude incorrect for 50 Ohm load

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DLarson
Posts: 1
Joined: Mon Mar 16, 2015 5:28 pm

Output amplitude incorrect for 50 Ohm load

Post by DLarson »

The output amplitude is correct when driving a high-impedance load (oscilloscope set to 1MOhm), but the output measures low when driving 50 Ohm inputs.

This is a design flaw; a device that has 50 Ohm output impedance should be able to drive a 50 ohm load and achieve specified amplitudes and offsets. The signal generator is still usable, but you should be aware that this is an incorrect implementation.

Are there any workarounds to decrease the output impedance?
jye1
Posts: 1221
Joined: Wed Feb 20, 2013 4:58 pm

Re: Output amplitude incorrect for 50 Ohm load

Post by jye1 »

What you said is true and the manual also stated that. To maintain a constant output the voltage needs to be regulated. Not many simple generator can achieve that.

To lower output impedance adding one more current driving stage could help.
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