Absolutely ridiculous to exclude such a well used portion of the public safety P25 band like that. Hopefully this will be rectified in the near future. Love the scanner otherwise, but I am trying to monitor a local govt P25 system with a few freqs that fall out of the trx range, renderring it essentially useless on that system for the most part. Any rhyme or reason for this? Changes possibly forthcoming?
What are you trying to listen to? According to the official documentation, the TRX ranges are:
Spectrum Sweeper
25-54 MHz VHF Low Band
108-137 MHz VHF Aircraft Band
137-174 MHz VHF High Band
216-300 MHz 220 MHz Commercial/Amateur Band
300-406 MHz UHF Military Air Band
406-470 MHz UHF Band
470-512 MHz UHF-T Band
764-782 MHz 700 MHz Band
791-797 MHz 700 MHz Band
806-869 MHz 800 MHz Band
894-1300 MHz 900 MHz Band, 23 cm Amateur Band
This covers the base (and mobile simplex) side of the 700 MHz public safety band quite well; the mobile transmit frequencies are 30 MHz higher. Up to 763 MHz is part of the D Block and off-limits, while 763-764 would be a guard band requiring a special waiver and pretty stringent technical specs to use (in addition to an annual report to the FCC detailing how it's being used)
782-791 is not part of the public safety band (mostly C and D block cellular) so that's why it's blocked.
797-806 being blocked may be related to potential conflicts with images or birdies that pre-dates the availability of 700 MHz for anything but TV channels. I recall in the past that some scanners avoided certain 700 MHz ranges for this reason, and it may be a hardware consideration for the Whistler models.
800/801 would be mobile (repeater input) only, so I'm not sure what you would hear there that you wouldn't hear 30 MHz lower.