Tescom TC-3000C - Page 225

Appendix B. RF Test Cases of the TC-3000C
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4. The DUT is set to transmit on the given frequency channel.
5. The DUT is set to transmit the 11110000 bit pattern as payload. Tester measures
demodulation characteristics. Each bit is over sampled 10 times for one-slot packets and
8 times for 3,5-slot packets. Tester calculates for each "00001111" 8 bit sequence in the
payload the average frequency over the frequency values of the 8 bits. Then tester takes
the average over all bit samples as the deviation for each bit. For each second, third, sixth
and seventh of the 8 bits the deviation from the average frequency within the bit period is
recorded as df1_max. The average of all the df1_max deviation values measured before
is calculated, and recorded as df1_avg.
6. The DUT is set to transmit the 10101010 bit pattern as payload. Tester measures
demodulation characteristics and calculates for each "01010101" 8 bit sequence in the
payload the average frequency over these 8 bits. For each of the 8 bits the maximum
deviation from this average within the bit period is recorded as df2_max. The average of
all the maximum deviation values measured before is calculated, and recorded as df2_avg.
The minimum value of all deviations df2_max is recorded as df2_min. The rate of the
deviations df2_max, which are less than 115KHz, is recorded as df2_rate.
7. Steps 5 and 6 id repeated for required number of packets (see the Number of packets
parameter).
8. Steps 4 to 8 are repeated for each TX frequency channels of the DUT (see the
BT  channels parameter).
Test Results
df1_avg is the average of all frequency deviations for 11110000 bit pattern as payload,
measured in KHz.
df2_avg is the average of all frequency deviations for 10101010 bit pattern as payload,
measured in KHz.
df2_min is the minimum value of all frequency deviations for 10101010 bit pattern as payload,
measured in KHz. The result has only informative character and is not used to reach a verdict.
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:
“Up. Lim. of freq. deviat. for 11110000” (in KHz)
“Low. Lim. of freq. deviat. for 11110000” (in KHz)
“Low. Lim. of freq. deviat. for 1010” (in KHz)
“Max.num.of deviat.for 1010 < low.lim.” (in percents)
“Low. Lim. for the ratio of df2/df1” (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.
Requirement to Initial Condition of a DUT
If the DUT can be controlled through HCI, the DUT must be connected to an appropriate HCI
port of the tester and correct value of the HCI Port parameter must be specified in DUT
configuration (Menu  Configuration  DUT  More1/5  HCIPort).
If the DUT does not have HCI then the DUT must be in the Inquiry Scan/Page Scan state
(maximum activity of the scan mode is desirable) and Test Mode must be enabled.