AD9959 Single-Tone Mode,Power-Down Functions,Phase continuous ?

Hello,

In operating in single tone mode,

I use a power-down function of the software, and want to control the on / off DAC output(power-down) to each CH.

For example, the following is the setup procedure.

* SingleTone mode: set / update the register, DACOUT on,

CH1: Fout = xxxMHz, phase = 0deg

CH2: Fout = xxxMHz, phase = 90deg

* DAC power-down CH1 only; DAC power-down CFR [6]: 1

* DAC power-up CH1 only; DAC power-down CFR [6]: 0

* SingleTone mode: DACOUT on, + @ deg shift

CH1: Fout = xxxMHz, phase = 0deg + @deg ~

CH2: Fout = xxxMHz, phase = 90deg + @deg ~

In other words, After controlling the on / off DAC output(power-down) CH1,

is it phase continuous?

⊿ phase (CH1-CH2) = ⊿ 90deg ?

Fout: CH1 = CH2 = xxxMHz

Phase: CH2 = CH1 + ⊿ 90deg shift  ?

Please advice for me.

Best Regards.

sss