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DMA Problems

Commonly seen problems or issues with Uniden Dynamic Memory Architecture scanners.

Contents 1 My radio display shows "Nothing to Scan" 2 Audio cuts out every two seconds 3 No activity on trunked system 4 The frequency I enter is changed by the scanner 5 APCO 25 Digital transmission sound bad

[edit] My radio display shows "Nothing to Scan"

See Nothing to Scan

[edit] Audio cuts out every two seconds

Disable the following features, which interrupt the current transmission.

• Close Call
• SAME Weather Alert
• Priority Scan

[edit] No activity on trunked system

• Is the system configured as the correct system type, eg Type II or P25?
• Are the correct control channels frequencies programmed, are the channels unlocked, and can the scanner "hear" one of the control channels?
• Is the scanner in ID Scan mode and are any talkgroups programmed? (Alternately, switch to ID Search mode.)
  • Are the appropriate Groups enabled and unlocked with the id's of the Talkgroups you want to listen to?

[edit] The frequency I enter is changed by the scanner

Use the correct Frequency Step Size.

[edit] APCO 25 Digital transmission sound bad

See Uniden_Digital_AGC_Tweak_Procedures