I have created  a pulse source from a PWL file.
It‘s 32 samples of a signal. 

Is it possible to make this pulse train periodic?

Or do I have to provide the pulse samples for every period by the PWL file?

—
Christoph 

Am 08.07.2023 um 15:11 schrieb John Woodgate <jmw@...>:

There is an undocumented REPEAT feature in the Wiki at: /g/LTspice/wiki/13810

A list of data points or a file reference can be repeated a fixed amount of times <n>, or forever

PWL REPEAT FOR <n> (|<file spec>) ENDREPEAT
PWL REPEAT FOREVER (|<file spec>) ENDREPEAT

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 13:51, Christoph wrote:

I have created  a pulse source from a PWL file.
It‘s 32 samples of a signal. 

Is it possible to make this pulse train periodic?

Or do I have to provide the pulse samples for every period by the PWL file?

—
Christoph 

Thanks. This worked. Though the ?|‘ symbol (pipe) is confusing. If it designates that the data is supposed to be piped from the file, it doesn’t work. OTOH, should it mean an ?or“, then the empty left side of the ?|‘ shouldn’t be empty but contain a

list of <time><value> pairs.

—

Christoph

Am 08.07.2023 um 15:11 schrieb John Woodgate <jmw@...>:

There is an undocumented REPEAT feature in the Wiki at: /g/LTspice/wiki/13810

A list of data points or a file reference can be repeated a fixed amount of times <n>, or forever

PWL REPEAT FOR <n> (|<file spec>) ENDREPEAT
PWL REPEAT FOREVER (|<file spec>) ENDREPEAT

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 13:51, Christoph wrote:

I have created  a pulse source from a PWL file.
It‘s 32 samples of a signal. 

Is it possible to make this pulse train periodic?

Or do I have to provide the pulse samples for every period by the PWL file?

—
Christoph 

Am 08.07.2023 um 17:52 schrieb John Woodgate <jmw@...>:

If you look at the other examples on that page, you will see that the | character is only used with a file, not with a sequence of numbers.

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 16:40, Christoph wrote:

Thanks. This worked. Though the ?|‘ symbol (pipe) is confusing. If it designates that the data is supposed to be piped from the file, it doesn’t work. OTOH, should it mean an ?or“, then the empty left side of the ?|‘ shouldn’t be empty but contain a

list of <time><value> pairs.

—

Christoph

Am 08.07.2023 um 15:11 schrieb John Woodgate <jmw@...>:

There is an undocumented REPEAT feature in the Wiki at: /g/LTspice/wiki/13810

A list of data points or a file reference can be repeated a fixed amount of times <n>, or forever

PWL REPEAT FOR <n> (|<file spec>) ENDREPEAT
PWL REPEAT FOREVER (|<file spec>) ENDREPEAT

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 13:51, Christoph wrote:

I have created  a pulse source from a PWL file.
It‘s 32 samples of a signal. 

Is it possible to make this pulse train periodic?

Or do I have to provide the pulse samples for every period by the PWL file?

—
Christoph 

_._,_._,_

Fine so far, but using the | (vertical bar) gives an error.

PWL REPEAT FOREVER (file=Z:\Users\kuku\Documents\LTspiceXVII\pulses.txt) ENDREPEAT works, while

PWL REPEAT FOREVER (| file=Z:\Users\kuku\Documents\LTspiceXVII\pulses.txt) ENDREPEAT

doesn’t So what is the purpose of the ?|‘?

—

Christoph

Am 08.07.2023 um 17:52 schrieb John Woodgate <jmw@...>:

If you look at the other examples on that page, you will see that the | character is only used with a file, not with a sequence of numbers.

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 16:40, Christoph wrote:

Thanks. This worked. Though the ?|‘ symbol (pipe) is confusing. If it designates that the data is supposed to be piped from the file, it doesn’t work. OTOH, should it mean an ?or“, then the empty left side of the ?|‘ shouldn’t be empty but contain a

list of <time><value> pairs.

—

Christoph

Am 08.07.2023 um 15:11 schrieb John Woodgate <jmw@...>:

There is an undocumented REPEAT feature in the Wiki at: /g/LTspice/wiki/13810

A list of data points or a file reference can be repeated a fixed amount of times <n>, or forever

PWL REPEAT FOR <n> (|<file spec>) ENDREPEAT
PWL REPEAT FOREVER (|<file spec>) ENDREPEAT

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 13:51, Christoph wrote:

I have created  a pulse source from a PWL file.
It‘s 32 samples of a signal. 

Is it possible to make this pulse train periodic?

Or do I have to provide the pulse samples for every period by the PWL file?

—
Christoph 

Here is my best guess.

I think "analog spiceman" authored that information about the REPEAT ... ENDREPEAT syntax.? Maybe he meant to write it like this:

... PWL REPEAT FOR <n> ( <t1> <v1> ... <tn> <vn> | file=<file spec> ) ENDREPEAT
... PWL REPEAT FOREVER ( <t1> <v1> ... <tn> <vn> | file=<file spec> ) ENDREPEAT

In other words, you have a choice between either the time,value list, OR a filename.? I think that's why he used a "|" character there, to show that you have a choice between options -- and somehow the first one got edited out, as well as the "file=" in the second choice.? But the "|" character itself is NOT part of the syntax.

I don't know; but it works for me.

Andy

John asked, "What do you understand 'file spec' to mean? Is it another term for 'filename'?"

Almost yes.? That is commonly what "file spec" (or "filespec") means, except that a filespec may include the path, so it can be the full location of a file on your drive, not just the filename which is everything after the path (after the last "\") in the filespec.

I thought everyone knew that already.? I guess not.? Sorry.

Andy

Fine so far, but using the | (vertical bar) gives an error.

PWL REPEAT FOREVER (file=Z:\Users\kuku\Documents\LTspiceXVII\pulses.txt) ENDREPEAT works, while

PWL REPEAT FOREVER (| file=Z:\Users\kuku\Documents\LTspiceXVII\pulses.txt) ENDREPEAT

doesn’t So what is the purpose of the ?|‘?

—

Christoph

Am 08.07.2023 um 17:52 schrieb John Woodgate <jmw@...>:

If you look at the other examples on that page, you will see that the | character is only used with a file, not with a sequence of numbers.

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 16:40, Christoph wrote:

Thanks. This worked. Though the ?|‘ symbol (pipe) is confusing. If it designates that the data is supposed to be piped from the file, it doesn’t work. OTOH, should it mean an ?or“, then the empty left side of the ?|‘ shouldn’t be empty but contain a

list of <time><value> pairs.

—

Christoph

Am 08.07.2023 um 15:11 schrieb John Woodgate <jmw@...>:

There is an undocumented REPEAT feature in the Wiki at: /g/LTspice/wiki/13810

A list of data points or a file reference can be repeated a fixed amount of times <n>, or forever

PWL REPEAT FOR <n> (|<file spec>) ENDREPEAT
PWL REPEAT FOREVER (|<file spec>) ENDREPEAT

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 13:51, Christoph wrote:

I have created  a pulse source from a PWL file.
It‘s 32 samples of a signal.

Is it possible to make this pulse train periodic?

Or do I have to provide the pulse samples for every period by the PWL file?

—
Christoph

That is a "logical OR"? separating two optional forms of the command or of a command's parameters.

There is a formal mechanism for language specification (whose name I can't remember despite using is so many times for so long...).

If I manage to remember, I'll toss it your way.

Donald.

On 2023-07-08 11:56, Christoph wrote:

Fine so far, but using the | (vertical bar) gives an error.

PWL REPEAT FOREVER (file=Z:\Users\kuku\Documents\LTspiceXVII\pulses.txt) ENDREPEAT works, while

PWL REPEAT FOREVER (| file=Z:\Users\kuku\Documents\LTspiceXVII\pulses.txt) ENDREPEAT

doesn’t So what is the purpose of the ?|‘?

—

Christoph

Am 08.07.2023 um 17:52 schrieb John Woodgate <jmw@...>:

If you look at the other examples on that page, you will see that the | character is only used with a file, not with a sequence of numbers.

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 16:40, Christoph wrote:

Thanks. This worked. Though the ?|‘ symbol (pipe) is confusing. If it designates that the data is supposed to be piped from the file, it doesn’t work. OTOH, should it mean an ?or“, then the empty left side of the ?|‘ shouldn’t be empty but contain a

list of <time><value> pairs.

—

Christoph

Am 08.07.2023 um 15:11 schrieb John Woodgate <jmw@...>:

There is an undocumented REPEAT feature in the Wiki at: /g/LTspice/wiki/13810

A list of data points or a file reference can be repeated a fixed amount of times <n>, or forever

PWL REPEAT FOR <n> (|<file spec>) ENDREPEAT
PWL REPEAT FOREVER (|<file spec>) ENDREPEAT

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 13:51, Christoph wrote:

I have created  a pulse source from a PWL file.
It‘s 32 samples of a signal.

Is it possible to make this pulse train periodic?

Or do I have to provide the pulse samples for every period by the PWL file?

—
Christoph

Regular expression?

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 19:43, Donald H Locker via groups.io wrote:

That is a "logical OR"? separating two optional forms of the command or of a command's parameters.

There is a formal mechanism for language specification (whose name I can't remember despite using is so many times for so long...).

If I manage to remember, I'll toss it your way.

Donald.

On 2023-07-08 11:56, Christoph wrote:

Fine so far, but using the | (vertical bar) gives an error.

PWL REPEAT FOREVER (file=Z:\Users\kuku\Documents\LTspiceXVII\pulses.txt) ENDREPEAT works, while

PWL REPEAT FOREVER (| file=Z:\Users\kuku\Documents\LTspiceXVII\pulses.txt) ENDREPEAT

doesn’t So what is the purpose of the ?|‘?

—

Christoph

Am 08.07.2023 um 17:52 schrieb John Woodgate <jmw@...>:

If you look at the other examples on that page, you will see that the | character is only used with a file, not with a sequence of numbers.

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 16:40, Christoph wrote:

Thanks. This worked. Though the ?|‘ symbol (pipe) is confusing. If it designates that the data is supposed to be piped from the file, it doesn’t work. OTOH, should it mean an ?or“, then the empty left side of the ?|‘ shouldn’t be empty but contain a

list of <time><value> pairs.

—

Christoph

Am 08.07.2023 um 15:11 schrieb John Woodgate <jmw@...>:

There is an undocumented REPEAT feature in the Wiki at: /g/LTspice/wiki/13810

A list of data points or a file reference can be repeated a fixed amount of times <n>, or forever

PWL REPEAT FOR <n> (|<file spec>) ENDREPEAT
PWL REPEAT FOREVER (|<file spec>) ENDREPEAT

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 13:51, Christoph wrote:

I have created  a pulse source from a PWL file.
It‘s 32 samples of a signal.

Is it possible to make this pulse train periodic?

Or do I have to provide the pulse samples for every period by the PWL file?

—
Christoph

On Jul 8, 2023, at 14:48, Donald H Locker via groups.io <dhlocker@...> wrote:

?

Backus-Nauer Form! (commonly just "BNF")

Donald.

On 2023-07-08 14:45, John Woodgate wrote:

Regular expression?

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 19:43, Donald H Locker via groups.io wrote:

That is a "logical OR"? separating two optional forms of the command or of a command's parameters.

There is a formal mechanism for language specification (whose name I can't remember despite using is so many times for so long...).

If I manage to remember, I'll toss it your way.

Donald.

On 2023-07-08 11:56, Christoph wrote:

Fine so far, but using the | (vertical bar) gives an error.

PWL REPEAT FOREVER (file=Z:\Users\kuku\Documents\LTspiceXVII\pulses.txt) ENDREPEAT works, while

PWL REPEAT FOREVER (| file=Z:\Users\kuku\Documents\LTspiceXVII\pulses.txt) ENDREPEAT

doesn’t So what is the purpose of the ?|‘?

—

Christoph

Am 08.07.2023 um 17:52 schrieb John Woodgate <jmw@...>:

If you look at the other examples on that page, you will see that the | character is only used with a file, not with a sequence of numbers.

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 16:40, Christoph wrote:

Thanks. This worked. Though the ?|‘ symbol (pipe) is confusing. If it designates that the data is supposed to be piped from the file, it doesn’t work. OTOH, should it mean an ?or“, then the empty left side of the ?|‘ shouldn’t be empty but contain a

list of <time><value> pairs.

—

Christoph

Am 08.07.2023 um 15:11 schrieb John Woodgate <jmw@...>:

There is an undocumented REPEAT feature in the Wiki at: /g/LTspice/wiki/13810

A list of data points or a file reference can be repeated a fixed amount of times <n>, or forever

PWL REPEAT FOR <n> (|<file spec>) ENDREPEAT
PWL REPEAT FOREVER (|<file spec>) ENDREPEAT

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 13:51, Christoph wrote:

I have created  a pulse source from a PWL file.
It‘s 32 samples of a signal.

Is it possible to make this pulse train periodic?

Or do I have to provide the pulse samples for every period by the PWL file?

—
Christoph

Am 08.07.2023 um 20:43 schrieb Donald H Locker via <dhlocker@...>:

That is a "logical OR"? separating two optional forms of the command or of a command's parameters.

There is a formal mechanism for language specification (whose name I can't remember despite using is so many times for so long...).

If I manage to remember, I'll toss it your way.

Donald.

On 2023-07-08 11:56, Christoph wrote:

Fine so far, but using the | (vertical bar) gives an error.

PWL REPEAT FOREVER (file=Z:\Users\kuku\Documents\LTspiceXVII\pulses.txt) ENDREPEAT works, while

PWL REPEAT FOREVER (| file=Z:\Users\kuku\Documents\LTspiceXVII\pulses.txt) ENDREPEAT

doesn’t So what is the purpose of the ?|‘?

—

Christoph

Am 08.07.2023 um 17:52 schrieb John Woodgate <jmw@...>:

If you look at the other examples on that page, you will see that the | character is only used with a file, not with a sequence of numbers.

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 16:40, Christoph wrote:

Thanks. This worked. Though the ?|‘ symbol (pipe) is confusing. If it designates that the data is supposed to be piped from the file, it doesn’t work. OTOH, should it mean an ?or“, then the empty left side of the ?|‘ shouldn’t be empty but contain a

list of <time><value> pairs.

—

Christoph

Am 08.07.2023 um 15:11 schrieb John Woodgate <jmw@...>:

There is an undocumented REPEAT feature in the Wiki at: /g/LTspice/wiki/13810

A list of data points or a file reference can be repeated a fixed amount of times <n>, or forever

PWL REPEAT FOR <n> (|<file spec>) ENDREPEAT
PWL REPEAT FOREVER (|<file spec>) ENDREPEAT

======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only

Rayleigh, Essex UK

I hear, and I forget. I see, and I remember. I do, and I understand. Xunzi (340 - 245 BC)

On 2023-07-08 13:51, Christoph wrote:

I have created  a pulse source from a PWL file.
It‘s 32 samples of a signal.

Is it possible to make this pulse train periodic?

Or do I have to provide the pulse samples for every period by the PWL file?

—
Christoph