Appendix B. RF Test Cases of the TC-3000C
232
Test Procedure
1. If the DUT is not connected then the tester creates connection via access procedures
(paging and inquiry if necessary).
2. The tester will activate test mode (if the test mode is not activated yet) and will set all
necessary parameters of the test mode depending on the Test Mode, Packet type and
Hopping mode parameters.
3. The tester checks whether the DUT transmits at maximum power. If not and the DUT
supports power control, then the tester will consecutively send LMP_incr_power_req requests
until the LMP_max_power response would be received from the DUT. The time delay between
two consequential LMP_incr_power_req requests depends on the Pow.SetTime parameter (to
modify the value use: Menu Configuration DUT More3/5 Pow.SetTime, default
value is equal to 1 second).
4. The DUT is set to transmit on the given frequency channel.
5. Tester measures the initial frequency error. To measure it, tester selects those bits from the
header that have the same value as both the previous and following bits so are not
significantly affected by inter-symbol interference. Tester calculates Δw1 of those selected
packet header bits that represent a transmitted ‘1’. Tester calculates Δw2 of those selected
packet header bits that represent a transmitted ‘0’. The initial frequency error is Δwi = (Δw1 +
Δw2)/2.
6. Tester partitions the payload into non-overlapping blocks of 50usecs beginning at the
normal start of the synchronization symbol following the reference symbol and finishing at the
nominal end of the final payload CRC symbol. For each block, tester calculates the frequency
error w0 for the RMS DEVM for the block. The frequency error w0 and the RMS DEVM for
each block are recorded.
7. Steps 5 and 6 are repeated for required number of packets (see the Number of packets
parameter).
8. Steps 4 to 7 are repeated for each TX frequency channels of the DUT (see the
BT
channels parameter).
Test Results
wi is the initial carrier frequency error measured form packet header.
W0 is the frequency error of 50-usec DPSK portion.
RMSDEVM is RMS value of Differential Error Vector Magnitude.
PeakDEVM is maximum peak value of Differential Error Vector Magnitude.
df2_rate is the rate of the bits with deviation df2_max less than 115 kHz in percents.
df2/df1 is the ratio of all frequency deviations df2_avg and df1_avg.
To reach a verdict the test results are compared with the limit parameters:
“Upper limit of requency error w0 for 50us DPSK blocks in kHz”
“Upper limit of initial frequency error wi in kHz”
“Upper limit of frequency error sum w0 + wi in kHz”
“Upper limit of RMS DEVM”
“Upper limit of Peak DEVM”
“Upper limit of DEVM”
“Lower limit for symbol with DEVM < upper limit in percents”
To change the parameters, use the Edit menu of the test case. If the flag “Use Default” is
selected then all of displayed values of parameters are ignored and the values according to RF
Test Specification [1] are assigned automatically.
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