modulo operation in calculator?

[linkin]

Hi,

I'm trying to measure the phase of a squarewave signal (that has
jitter) over time. The way I am doing this is finding the threshold
crossing times using the cross() function in the calculator (I'm using
IC5141). This gives me a list of times that the signal crosses a
threshold. Call those times T1, T2, ..., TN. What I want to do next
is to take those T1, T2,... TN values and MOD (modulo operation) them
with the period of a reference squarewave signal. However, when I use
the mod() function in the calculator, it complains that the operands
are not integers. I tried multiplying everything by 1e12 (since I am
working on the picosecond scale) to turn the operands into integers,
but the calculator can't seem to handle an expression with 1e12 in it
(the value becomes 2147483647 when I evaluate it).

I looked into the documentation for calculator with no luck.

Does anyone know how I can efficiently make the measurement I want?

Thanks in advance!
Andrew

 

[linkin]

Actually, don't worry about it. I'm just going to export the waveform
to MATLAB for post-processing.
Thanks.

On Jan 15, 12:01 pm, "linkin" <liu.an...@gmail.com> wrote:

Hi,

I'm trying to measure the phase of a squarewave signal (that has
jitter) over time. The way I am doing this is finding the threshold
crossing times using the cross() function in the calculator (I'm using
IC5141). This gives me a list of times that the signal crosses a
threshold. Call those times T1, T2, ..., TN. What I want to do next
is to take those T1, T2,... TN values and MOD (modulo operation) them
with the period of a reference squarewave signal. However, when I use
the mod() function in the calculator, it complains that the operands
are not integers. I tried multiplying everything by 1e12 (since I am
working on the picosecond scale) to turn the operands into integers,
but the calculator can't seem to handle an expression with 1e12 in it
(the value becomes 2147483647 when I evaluate it).

I looked into the documentation for calculator with no luck.

Does anyone know how I can efficiently make the measurement I want?

Thanks in advance!
Andrew

 

newer version of IC has modf() function that accept floating point numbers. However, it can not work on signal type.

Amer

On Monday, January 15, 2007 at 12:01:38 PM UTC-5, linkin wrote:

Hi,

I'm trying to measure the phase of a squarewave signal (that has
jitter) over time. The way I am doing this is finding the threshold
crossing times using the cross() function in the calculator (I'm using
IC5141). This gives me a list of times that the signal crosses a
threshold. Call those times T1, T2, ..., TN. What I want to do next
is to take those T1, T2,... TN values and MOD (modulo operation) them
with the period of a reference squarewave signal. However, when I use
the mod() function in the calculator, it complains that the operands
are not integers. I tried multiplying everything by 1e12 (since I am
working on the picosecond scale) to turn the operands into integers,
but the calculator can't seem to handle an expression with 1e12 in it
(the value becomes 2147483647 when I evaluate it).

I looked into the documentation for calculator with no luck.

Does anyone know how I can efficiently make the measurement I want?

Thanks in advance!
Andrew