Example HDL: AXI DDS Compiler, Simulink period set to 1 despite frequency is 1Mhz

[mohammadsdtmnd]

Hello, I want to check the output frequency of DDS with spectrum analyzer. But the example told to set Simulink period in Vitis hub settings to 1. This causes spectrum analyzer to show signal frequency incorrectly.
I really can't understand why this tutorial creator set the Simulink period to 1 instead of 1/100e6 to help fully see output frequency. Setting that to 1 only creates ambiguity, doesn't it?
Though I've set Simulink period to 1/100e6 and the output of DDS became 0.
Any help will be appreciated.