Yes you can. This is actually a service manual but it covers the basics found in the users manual in the first part of the first link. Also with a service manual you can dissect the radio to perform repairs.
Part 1 - http://www.cbtricks.com/radios/connex/cx_4400_cx4400hp/graphics/connex_cx4400_cx4400hp_sm_pg01_pg15.pdf
Part 2 -
http://www.cbtricks.com/radios/connex/cx_4400_cx4400hp/graphics/connex_cx4400_cx4400hp_sm_pg16_pg33.pdf Regards, Tony
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Regards, Tony