Rohde & Schwarz 1094.0006.50, Руководство по эксплуатации

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CTS55 Test Sequence
1094.0006.55 4.1 E-6
4 Autotest Sequence in Detail
4.1 General
The tests to be carried out in the Autotest mode are optimised to enable the user to draw a conclusion in
the shortest possible time on whether the mobile is functioning correctly or not. The CTS is however not
capable of checking the GSM specification in all its details. A check of this type would of course require
a considerably greater expenditure in time and test equipment.
The first five test steps of the Autotest are concerned with establishing and releasing the link between
the mobile and the CTS. If any one of these tests fails the link cannot be established or released
properly and testing ends with the "fail" message. If the tests are successful a "
9
"
is placed in the box
next to the test name.
The remaining tests are measurements. The results of these measurements are shown either as values
or as pass/fail messages. It is possible to toggle between the displays for measured value, pass/fail and
tolerance.
In Autotest the user can influence the duration of a test in several ways. Firstly he can choose to carry
out the measurements on one, two or three channels. Secondly he can vary the number of frames for
the bit error rate measurement. The shortest test is achieved by carrying out the test on one channel
only and by setting the number of frames for the bit error rate measurement to the minimum. However,
this will exclude the channel change test that is carried out when switching to the second and third
channel.
Furthermore the user has the option to either freely define the tolerances for the measurements carried
out in Autotest or to select one of two predefined sets of tolerances. The two predefined sets of
tolerances are called "narrow" for narrow tolerances and "wide" for wide tolerances. For the freely
definable tolerances the "custom" set of tolerances must be set, however in this case the tolerances are
taken from the Manual Test. The table below shows the predefined tolerances for each set of tolerances
and the tolerance parameters taken from the Manual Test.
Note:
The tolerances for the frequency error depend on the network (GSM850, GSM, PCN, PCS).
Measurement wide narrow (Rec) Custom
Avg. Pow 1
Avg. Pow 2
Avg. Pow 3
RxLev
RxQual
Phase RMS
Phase PK
Frequ. GSM/GSM850
PCN/PCS
Ramp
RBER II
RBER Ib
FER
± 5 dB
± 5 dB
± 5 dB
± 5 dB
≤
6.4%
< 5°
< 20°
90 Hz
180 Hz
Power Ramp
Config
(Template)
< 5.2%
< 0.8%
< 2.0%
± 3 dB
± 3 dB
± 3 dB
± 4 dB
≤
3.2%
< 5°
< 20°
90 Hz
180 Hz
Power Ramp
Config
(Template)
< 2.6%
< 0.4%
< 1.0%
Config Power Ramp : Tol highest PCL
Config Power Ramp : Tol other PCL
Config Power Ramp : Tol other PCL
± 5 dB
≤
6.4%
Config Phase/Freq : Phase Error (RMS)
(current)
Config Phase/Freq : Phase Error (PK)
(current)
Config Phase/Freq : Frequency Error
(current)
Config Power Ramp
(Template)
Config BER : Class II
Config BER : Class Ib
Config FER : Frame
The user can also configure Autotest to perform either a one or two band test. A two band test
sequence will allow two GSM bands to be tested within the same sequence, in addition to performing
two handover tests. These being the handover to the new GSM band and the handover from the new
band back to the original GSM band.