What is "radix point" in VisSim?

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Submitted by sachingaikwad on Tue, 05/08/2012 - 00:29

 

 

Please explain radix Point in VisSim fixed point blocks. Is it base or exponent to 2? I have a problem with converting value 1.32 to 1.16 is it correct to use convert block or not?

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  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited June 2016

    Submitted by Anders89 on Tue, 05/08/2012 - 01:01.

    Radix point is the binary equivalent of the decimal point in the VisSim/Fixed-point block set. In your example of 1.32 and 1.16, the radix point is 1 in both of them. This means that you have 1 bit of integer magnitude in a 16-bit and 32-bit word respectively. So the remaining bits are fractional. Because we use 2's complement notation, the top most bit is the sign bit. Yes, you can use a VisSim convert block to convert between different fixed point word sizes or radix points. What was your problem exactly?

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