Different presenting bit number between External mode and External PLL mode

Hi Team,

Hope this find you as well!

We entered into Moku:Go Lockin Amp mode through Python sample code provided on the web site.

Then, connect input 1 with modulated signal and input 2 with reference signal.
And we find that the demodulated signal presented in different bit number in External mode and External PLL mode, respectively.

As shown in following 2 figures,
figure 1 shows the demodulated signal in External mode;
figure 2 shows the demodulated signal in External PLL mode.

P.S. PLL module were set as Frequency: Auto; PLL Frequency: 10kHz (same as reference signal); PLL BW: 10Hz

We are wondering whether we could make the presenting bit number of External PLL mode same as External mode?

Thank you for your assistance in advanced!

Best Regards,
Hao-Yu