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The hardware code contains some useful information if you want to find out more about a specific terminal. The two main areas of concern are the frequency coverage and the encryption that the device supports.
On handhelds, remove the battery and you should find a sticker with the Hardware Code. On mobiles, the sticker will be located on the main unit.
Ignore the first three characters, and look at the next two to get the "band". Refer to the chart below to find out what frequencies the device covers.
The 6th digit tells you about the encryption:
0 = Clear (No encryption).
1 = TEA1
2 = TEA2 (Probably a missing Airwave set. AVOID!)
3 = TEA3
Examples:
The format of the HW code on an SRH3800 on TW band and clear (no encryption) would look like this: PSGTW001T400100
The format of the HW code on an SRH3800 on TG band and TEA2 encryption would look like this: PSGTG201T400100
On Sepura devices, there are a few hidden menus. Key in the following numbers:
*477 Network Quality, Neighbour Cells, GPS Information, Hardware/Software version and more.
*2797 Battery information page.
*762 Start streaming GPS data over the serial connector.
The diagram below shows the spread of frequency coverage for various commonly found Tetra terminals.