Railroad Forums
Moderator: Aa3rt
CarterB wrote:Wideband (25KHz splits) to narrowband (12.5 KHz splits) mandatory by Jan 1 2013. Then to 6.25KHz splits sometime in the future (already being worked on) Some scanners are tunable to frequency splits, others not. If you have older scanner you will still be able to hear a narrow band transmission dead center on a frequency, but it may be scratchy.Note also it is my understanding that the 6.25kHz splits will be exclusively digital. The bandwidth is too narrow for FM to convey the intelligence.
Steve F45 wrote:how do you know if you have a scanner that can be reprogammed for the narrowband switch? I have a radioshack pro97 from 2006.(1) Read the specs in the manual for the radio.
Ken W2KB wrote:And like I said above and Ken kind of said, it may not take the actual 7.5 kHz freq., but will convert it to the closest freq. that the scanner's tuning board is capable of like my PRO-2034 did here at home for our county's police freqs. Actual freq.-158.7975, in which my scanner converted to 158.800 and I still hear it fine.Steve F45 wrote:how do you know if you have a scanner that can be reprogammed for the narrowband switch? I have a radioshack pro97 from 2006.(1) Read the specs in the manual for the radio.
(2) Try programming a frequency 7.5 kHz away from a known channel. If it "takes" then OK.