What's the difference between the JPS NIR-10 Amateur Version & SWL Version DSP?

[compuscan]

I have a friend with the JPS NIR-10 audio DSP filter with the latest software ROMs (Amateur version) with NAR: 250Hz, MED: 600 Hz, WIDE:1800Hz filters.

JPS also sold the NIR-10 as a Shortwave version and the only difference I can see is wider filters (SWL) NAR:1800Hz, MED:2400Hz, WIDE: 3000Hz.

It looks like the exact same unit with only a minor change for filter size (ROM Programming/Jumpers/Diode/etc).

Does anyone know the exact change and can the Amateur version be converted/changed to the Shortwave version?

BTW, How do you tell the SWL Version from the Amateur Version by looking at it. I know the Amateur version don't have Amateur on the label but is the SWL version clearly marked somewhere?

If it can't be converted, what's the best mode to listen to noisy Commercial Shortwave Broadcast Stations (Bandpass mode/Wide Filter 1800hz or Bypass peak mode)?

 

[devicelab]

I have a friend with the JPS NIR-10 audio DSP filter with the latest software ROMs (Amateur version) with NAR: 250Hz, MED: 600 Hz, WIDE:1800Hz filters. JPS also sold the NIR-10 as a Shortwave version and the only difference I can see is wider filters (SWL) NAR:1800Hz, MED:2400Hz, WIDE: 3000Hz.

Does anyone know the exact change and can the Amateur version be converted/changed to the Shortwave version?

Well obviously with those bandwidths, the first version is aimed at CW or RTTY/FSK operators. The SWL version is aimed at SSB voice operators. I know some contest amateurs who run SSB voice @ 1800hz but they're crazy. It's usable but not very enjoyable to listen to over time.

How do you tell the SWL Version from the Amateur Version by looking at it.

From the pictures I found online -- you don't. May be there's a serial number with model info -- no idea.

What's the best mode to listen to noisy Commercial Shortwave Broadcast Stations (Bandpass mode/Wide Filter 1800hz or Bypass peak mode)?

Neither -- it's not meant for AM broadcast.

Unless you're stuck with an old SW receiver with a fixed bandwidth, then this won't be an issue with receivers made in the 1980s or later. Newer receivers let you customize bandwidths electronically.