RadioReference2PCR1000

Convert the frequency database csv file from the radioreference.com site to the Icom PCR1000 MCH file
Author William Main - [email protected]

Notes:
    The name of the MCH file will have the same base name as the csv file.
        aid_7768.csv --> aid_7768.mch
        metro_22.csv --> metro_22.mch
        
        *if the number of channels or frequencies exceed the limits of a single MCH file then 
        multiple MCH files will be created ie file1.mch, file2.mch, ...., fileX.mch

    Exit codes:
        1 - CSV input file selection cancelled
        2 - file names verification failed (user clicked no)

    MCH file format
        Header
            [REV]
            ID=1.0.0
            APP=IC-PCR1000  Revision 2.2

        for each memory bank (00 - 19)
        [BANK##]
        BANKNAME=THIS IS THE NAME OF THE BANK
        ACTIVECH=##
        ##=NAME,REMARK,FREQUENCY,MODE,FILTER,ATT,TS,SEL,SKIP,T-SQL
        where
            ## = 00 - 49
            NAME = is a name of the channel ie Toronto Ambulance
            REMARK = any remark about the contents ie Simplex for person to person only
            FREQUENCY = the frequency in MHz ie 124.75
            MODE = one of AM, FM, WFM, CW, USB, LSB
            FILTER = band pass filter one of
                MODE = AM, CW, USB, LSB
                    3k, 6k
                 MODE = FM
                    6k, 15k, 50k
                MODE = WFM
                    50k, 230k
            ATT = ON or OFF, this is the signal attenuator
            TS = ##KHz, this is the tuning step
            SEL = ON or OFF, this is whether the channel is selected
                see set function, Memory SCAN tab
            SKIP = ON or OFF, this is whether or not to skip this channel
                see set function, Memory SCAN tab
            T-SQL = the tone squelch frequency
                one of OFF,