from the manual
Programming Custom Search Ranges
You can define each search range used during a Custom Search.
1. Press Func then Pgm/E in Custom Search mode to view
the Search menu.
2. Turn SCROLL CONTROL to Program Limits and press
Pgm/E.
3. Turn SCROLL CONTROL to Search Bank 1-10 and press
Pgm/E. You will see the previously programmed lower
frequency. At Lower, press Pgm/E and use the keypad to
enter the lower limit frequency then press Pgm/E.
4. Scroll to Upper and press Pgm/E. You will see the
previously programmed upper frequency. Use the keypad
to enter the upper limit frequency then press Pgm/E.
5. Press . Clr to return to the Select Bank menu. Repeat for
each custom search bank you want to reprogram then
press Srch/Svc to start searching.
http://info.uniden.com/twiki/pub/UnidenMan4/BC125AT/BC125AT.pdf
without the radio i find it hard to follow.
i have programmed unidens but that was in person. with a radio in hand you get to see what it does faster