Thrane&Thrane Sailor RT5022 VHF DSC Manual

Technical Notification

September 2005

Document no.

20050926

Sailor RT5022 VHF DSC

Subject:

Incorrect factory setting of power output in DSC and Distress-transmission.

It has just come to our attention that in a limited number of RT5022 VHF DSC of recent

production the RF output power in DSC transmission has erroneously been set to 1W rather

than 25W, caused by an incorrect setup in the production final test equipment.

The serial number identification of units to which this erroneous power setting may apply

is found within the range of s/n 05737163 through s/n 05749592.

The incorrect power setting may be operationally verified by the <1W> indicator lamp in the

display lighting, when transmitting a DSC-call.

It is imperative that this DSC power setting be reset to 25W in all units identified within

the above mentioned serial number range as this power setting applies to the Distress

transmission also.

To accomplish the required reset of the DSC-transmission output power, a program has

been created that will automatically reset to correct power level. The procedure requires

the use of an SB5006 service tool. Follow the procedure described below to accomplish the

successful reset of the DSC power level to 25W.

NOTE: This procedure is applicable only to VHF radios with Main Release 1.30 software,

but otherwise harmless to other versions.

Table of Contents

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Page 1 Technical Notification September 2005 Document no. 20050926 Sailor RT5022 VHF DSC Subject: Incorrect factory setting of power output in DSC and Distress-transmission. Identification: It has just come to our attention that in a limited number of RT5022 VHF DSC of recent production the RF output power in DSC transmission has erroneously been set to 1W rather than 25W, caused by an incorrect setup in the production final test equipment.
Page 2 Applying the fix to the VHF radio: The patch is enclosed in a zip file (TT_RT5022_patch_w39.zip) and available for download at http://www.extranet.thrane.com/. Prior to proceeding with the described DSC power reset, unpack the zip file contents (a directory named TT_RT5022_patch_w39) and save this on your service pc desktop.
Page 3 5) Press Connect to Lanbox. The window should display the following message: If the message does not appear as described please check your setup; RT5022, SB5006, etc. and close the program. Then retry the procedure. 6) Now press Patch DSC low power. The patch is now executed. The detail progress is reported in the window.
Page 4 If the program fix is applied to radios with software different from Main Release 1.30 the following transcript might be seen, showing the fix is not needed on this version. 7) After successful update close the window. Important: After having executed the patch, the successful reset of the power setting to 25W should be verified by performing a DSC call, and noting that the <1W>...