what are the output pwelch units

Iam using pwelch as:

    dat = data; % in uv
    win = 1024;
    wlen= hamming(win); 
    nfft = win;
    SpectType = 'psd';
    Noverlap = []; 
    Fs = 1000;

[Pxx,f] = pwelch(dat,wlen,Noverlap,nfft,Fs,SpectrumType);
plot(f,Pxx,'r','LineWidth',1);
xlabel('Frequency (Hz)')      
ylabel('PSD (uV ^{2} / Hz)');

My question is considering that the units of dat are in uV the Y-axis of pwelch output will be in uV^2/Hz right? In other words the ylabel is correct right?

Answer 1

[Star Strider]

As I read the documentation on pwelch, your ylabel is correct. The pwelch function would output the power at each frequency, and power is essentially amplitude squared.