I've been maintaining about 120 LPH's for 17 years. This is the info I've gathered over the years on the 4 hex words in the LPH/LPI/LMH/PRC series radios that are edited by pressing F4 then F2 in the LPH editor program. These only matter on radios with the "-02" CPU. Older "-01" CPU's will have: $FFFF $FFFF $FFFF $5141 or $3142, or other model number in the last line and don't affect the operation of the radio. Default LPH numbers are: $00F0 (80F0 on LMH) $3F2B $E970 $195F Default PRC127 numbers are: $00B4 $3927 $EC60 $195F Explanation: 1st line: 00F0 1st byte. 00 is default, 8X for LMH Mobile '8' turns on the master battery saver defeat. The X can be 0 to 9 and is the selected CG tone when selectable channel guard is enabled. 2nd byte. F0 is default - 148mhz low freq limit. DC is for ham - 144mhz low freq limit. B4 is PRC127 - 136mhz low freq limit. This sets the lower frequency limit. hex F0 = 240 decimal 240/5+100=148, hex DC = 220 decimal/5+100=144 etc. This also changes the freq. where the high/low vco switch happens. VCO and receiver front end retuning may be necessary with large change of lower limit. So.. 85DC would be: battery saver defeated, tone from ch. 5 used on all channels, lower freq limit = 144. ------------------- 2nd line: 3F2B 1st byte. 3F is default. No idea! 00 disables 148 mhz. FF disables 174. ?? 2nd byte. 2B is default. This has to do with deviation compensation from 160.600 on up. ------------------- 3rd line. E970 is default. This is related to the IF offset of 16.900 mhz applied to the receive frequency. 10000(Hex)-E970(Hex)=1690. EC60 is for the PRC127 that uses 14.000mhz IF. -------------------- 4th line. 195F is default. 19 makes the 12.5 khz channels work. 5F makes the 5 khz channels work. No more info on these.