calculator numconv function

It's still rather unclear. Please show a plot of what the bus looks like when you plot it in ViVA. I assume you're running a simulation with the simulator being "ams"?

Regards,

Andrew

it is my 3 bit output. I convert it to signed decimal.I will check them and look them of psd in a single psd

OK, so the bus output are analog, not digital - the y-axis is in volts. So the approach you need to take is exactly as I described before - use Measurements->Analog to Digital to convert the analog bits into a digital bus (with your chosen radix). Then you probably want to convert that back into a voltage so that you can perform a PSD on it.

Here's an example of an A2D converter output which has been driven with a sine wave input.

I took the 8 digital bus signals shown at the top, and converted them to a bus using the form like this:

This gave the bus in the middle (below it is the expansion into the individual logic bits). If you zoom in, you'll see the numbers on the bus (note I picked. Unsigned Decimal because that's what my ADC would have produced, but the Radix can be signed Decimal too).

The bottom curve (in both plots) was the result of selecting "mybus" and using Measurements->Digital to Analog and converting it back into an analog waveform. That means you've now got an analog-like signal from your original digital bus (which was in volts rather than logic) and you can then do whatever signal processing you like on that.

Regards,

Andrew.

Sır, why I get 0. U want to say that digital output is not ideal u should convert to bits?

Well, with a centre value of 4, 800mV is always below 4, and so it's always zero. You probably want to enter a centre value of 400m or 0.4.

Andrew

In addition to this, we can create bus from the trace. But ı can not any signal in these section although selecting my signals before click trace-create-bus. It is since analog bits?

abdurrahman0234 said:

In addition to this, we can create bus from the trace. But ı can not any signal in these section although selecting my signals before click trace-create-bus. It is since analog bits?

I have no idea what you mean by this question.

Andrew