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AFG 3022C - Crank Signal Generation

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Posts: 1
Joined: April 30th, 2014, 1:07 am

AFG 3022C - Crank Signal Generation

Post by Soner » April 30th, 2014, 1:12 am

I try to generate VR sensor crank signal with AFG 3022C. The signal shape and amplitude is correctly generated.
But when i connect AFG to my ECU, signal amplitude drops to 1.2V range, from 5V.
When a real sensor is connected to ECU, signal raises to an amplitude of 20V.
What might be the problem?
Does anyone have a valid VR sensor signal points? I can implement and try it also.

David N
Tektronix Applications
Tektronix Applications
Posts: 558
Joined: July 31st, 2008, 8:26 am

Re: AFG 3022C - Crank Signal Generation

Post by David N » April 30th, 2014, 1:00 pm

The output impedance of the AFG3000 series is 50 Ω. If you connect a load other than 50 Ω, the displayed Amplitude, Offset, and High/Low values are different from the output voltage. To make the displayed values same as output voltage, you need to set load impedance. To set the load impedance, use the Output menu. Refer to page 82 of the user manual (077095700), which can be downloaded from Tek.com by searching on the manual number.

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