Frequency resolution of analog out card

Hi ,

I am using PXIe 6738 analog out card . I m trying to generate different sinusoidal waveform frequencies with the help of this card. I want to generate frequency in the resolution of 1 Hz for example - 5001Hz , 5002Hz , 5003Hz , Etc. 

I m using create task function of NI max .  giving three inputs to the software mentioned below .

1, Generation mode- Continuous ( always fixed)

2.Samples to write

3. Rate (Hz)

4. Terminal Configuration - RSE

 

I am able to achieve a resolution of 2.5 Hz with no. of samples per cycle =10 . Formula used to calculate sampling frequency is as follows

sampling frequency = Generated frequency * no. of samples / cycle

 

Please suggest how to do it .