Questions about AD9914 registers

Hi Support team,       

I would like to use AD9914 to achieve the output Sawtooth frequency rang 100MHz to 600MHz, I am not sure whether to configure pins 25, 26, 27 [PS0, PS1, PS2]. In other words,I am not sure whether to configure Single Tone Register.

I use external 100MHz crystal oscillator to multiply to 2.5GHz by internal PLL. Here is how I configure the register: CFR1(0x01,0x03,0x00,0x00)、CFR2(0x00,0x0C,0x28,0x00)、CFR3(0x00,0x44,0x11,0x50)、Digital Ramp Lower Limit Register(0x0A,0x3D,0x70,0xA4)、

Digital Ramp Upper Limit Register(0x3D,0x70,0xA3,0xD7)、Rising Digital Ramp Step Size Register(0x00,0x5E,0x5F,0x31)、Digital Ramp Rate Register(0x00,0x00,0x00,0x0F).

Here is how I configure the external pins: pin 63 is configured as high level, and pin 64 is configured as low level.

Thank you.