About an example in ADS2005

In ADS2005, there is an example of CATV_prj. The signal source is V-ntone with 77 frequences and voltages, such as Freq[1]=49 MHz,Freq[2]=55.25MHz... Freq[10]=103.25 MHz, Freq[11]=109.25 MHz.
HB simulation controller is set up as following:
Maxorder=2
Freq[1]=6 MHz
Freq[2]=0.25 MHz
Order[1]=100
Order[2]=1900
FundOrderSample=2
UseKrylov=yes
EquationName[1]="Vin"
EquationName[2]="X_dBmV"
My questions are:
1. Why do the Freqs be set to 6MHz and 0.25MHz?
2. Why is Order[1] equal to 100 and Order[2] equal to1900?
3. In simulation results, the carry frequencies are correct from 49 MHz to97.25 MHz.But after 97.25 MHz, like 103.25MHz, the carry frequencied become ***.3 MHz or ***.2 MHz, instead of ***.25MHz. Such as 103.25MHz becomes 103.3MHz. Why? Where is the problem?

Pls help!

Nobody do it?

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