how to handle odd units about scpi-parser

[j123b567]

Because of collisions in units and their prefixes, you must specify all combinations you want. Units prefixes are case insensitive.

Consider these examples:

• What is MHZ? - mega Hertz or milli Hertz
• What is MV? - mega Volt or milli Volt
• What is MOHM? - mega Ohm or milli Ohm

It all depends on your application and it is not possible to generate prefixes automaticly.

[karlp]

I more meant suffixes. I understand the M problem above, and SCPI even just says it's banned to use milli hertz, milli ohms and megavolts.

I was more meaning things like 400uVrms, 400mVrms and 400Vrms and 400uVpp, 400mVpp, 400Vpp, without specifying Vrms and Vpp as separate units, so the prefix would still do the x1000, /1000 type multipliers, but the suffix could have some other factor after the prefix was applied. Just idle thoughts really.

[j123b567]

I now understand what you want. There could be one array of units and each unit connected to array with possible prefixes for that unit.

V -> U,M,,K
Vrms -> U,M,,K
OHM -> ,K,M
HZ -> ,K,M,G

But now, it is not possible and it is hard to implement. The best way now is to expand all possible prefixes with all possible suffixes.

[karlp]

Indeed, I know it's not really possible in the current library, just something to think about .)

[j123b567]

Feel free to implement it ;)

[j123b567]

Just make two separate issues from this #26 and #25 so closing this.