PUMA T2
Technical Handbook
Troubleshooting
Page 78 OTE Proprietary information
P/N: 779-0306/01
Revision 03
Now turn on the terminal to be tested; it begins to search and then registers itself
with its identifier (ITSI), which will appear on the display.
When “CALL MOBILE” is pressed, the test set sends a call to the terminal under
test; when the terminal accepts the call, it is possible to check the “MODE” data on
the test set.
• Power Profile: ( “Passed” must appear).
• Other parameters are (see Table 1.A) “Burst Power” (it can be expressed in
dBm or mW), “Timing Error” (indicates the number of symbols read
erroneously), “Frequency Error” (frequency error) and “Vector Error” [referred
to the vector (symbol) transmitted; the mean error (RMS), the peak error
(PEAK and the residual error (RESIDUAL) are specified].
Even if only one of the parameters does not comply with the ETSI standard (see
Table 1.A), “Passed” does not appear next to “Power Profile”.
Tab. 7.1: Parameters
Phase Action Expected result
1 After the antenna has been
disconnected, connect the terminal
to the Tetra Test Set as explained in
this chapter of the manual.
None.
2 Carry out the necessary settings on
the Tetra Test Set (selection of the
TETRA environment, selection of
transmission mode, operating
frequency, etc.) to pick up the
carrier.
If the Tetra Test Set settings are
correct, it receives and demodulates the
radio terminal carrier. Depending on the
test set options, various screens appear
(constellation diagram, vector
modulation diagram, etc.).
3
Check the following on the Tetra
Test Set:
RF power
Frequency error
Vector error, mean value (RMS)
Vector error, peak value
Vector error, residual value
SYS INFO (correct decoding of
system data)
RF power
(1)
: 10 dBm/±1,5 dBm (up to
470 MHz)
10 dBm/±2 dBm (in the 870 MHz band)
Frequency error
(2)
: <0.1 ppm
Vector error, mean value (RMS)
(3)
:
<10%
Vector error, peak value
(4)
: <30%
Vector error, residual value: <5%
SYS INFO: correctly decoded
4 Drawing up of Test Report. None.
Notes:
(1): In compliance with ETSI 300 392-2 article 6.4.1.1, as recommended in ETSI 300 394-1 article
7.1.1.2
(2): The TETRA RF test set will have a precision in frequency greater than 0.1 ppm (BS diagram)
or will be tied to a higher external reference precision. If similar conditions are not complied
with, this measurement is not reliable and should only be considered approximate.
(3): In compliance with ETSI 300 392-2 article 6.6.1.2.
(4): In compliance with ETSI 300 392-2 article 6.6.1.2.
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