Part Number: CC3200
Dear Sir,
We use CC3200 for our e-lock application, and we test Wifi performance by our PCBA ( radio tools + IQxel 80 ).
Test results as below table.
|
DUT |
Data Rate |
Tx Chain |
Tx |
Tx |
Tx |
||||
|
Standard |
Modulation |
Tx EVM |
power |
EVM |
power |
EVM |
power |
EVM |
|
|
Ch 1 |
Ch 7 |
Ch 13 |
|||||||
|
11b |
DSSS- BPSK |
1 |
35% |
15.70 |
-25.98 |
17.73 |
-26.23 |
15.96 |
-25.78 |
|
DSSS- CCK |
11 |
35% |
15.17 |
-33.44 |
17.26 |
-31.78 |
15.56 |
-33.37 |
|
|
11g |
OFDM - BPSK |
6 |
-5 |
14.45 |
-22.68 |
16.13 |
-19.03 |
15.80 |
-18.22 |
|
OFDM - 64 QAM |
54 |
-27 |
7.34 |
-30.27 |
7.11 |
-25.69 |
7.90 |
-31.81 |
|
|
11n 20MHz |
MCS0 - OFDM - BPSK |
6.5 |
-5 |
13.83 |
-23.00 |
16.03 |
-18.52 |
14.95 |
-22.95 |
|
MCS7 - OFDM - 64QAM |
65 |
-27 |
5.78 |
-28.60 |
5.75 |
-34.13 |
6.82 |
-30.03 |
|
But we find out High throughput output power lower than SPEC over 7dB , we also test for CC3200 EVM and it is same results .
|
CC3200-EVM |
Data Rate |
Tx Chain |
Tx |
Tx |
Tx |
Tx |
Tx |
Tx |
|||||||
|
Standard |
Modulation |
Tx EVM |
power |
EVM |
power |
EVM |
power |
EVM |
power |
EVM |
power |
EVM |
power |
EVM |
|
|
Ch 1 |
Ch 2 |
Ch 6 |
Ch 7 |
Ch 11 |
Ch 13 |
||||||||||
|
11b |
DSSS- BPSK |
1 |
35% |
14.56 |
-26.05 |
14.43 |
-25.89 |
16.81 |
-26.31 |
16.22 |
-26.09 |
14.83 |
-25.92 |
14.49 |
-26.23 |
|
DSSS- CCK |
11 |
35% |
15.10 |
-33.87 |
14.85 |
-33.77 |
17.30 |
-33.29 |
16.72 |
-33.20 |
15.20 |
-33.70 |
14.92 |
-32.81 |
|
|
11g |
OFDM - BPSK |
6 |
-5 |
13.10 |
-24.82 |
13.83 |
-23.78 |
15.76 |
-19.33 |
15.65 |
-19.28 |
12.87 |
-27.02 |
13.92 |
-23.23 |
|
OFDM - 64 QAM |
54 |
-27 |
7.35 |
-28.81 |
7.83 |
-30.81 |
7.34 |
-29.63 |
7.16 |
-30.02 |
6.76 |
-29.24 |
7.38 |
-28.47 |
|
|
11n 20MHz |
MCS0 - OFDM - BPSK |
6.5 |
-5 |
12.38 |
-27.53 |
13.79 |
-23.47 |
15.63 |
-19.72 |
15.48 |
-19.02 |
12.08 |
-29.42 |
13.91 |
-24.31 |
|
MCS7 - OFDM - 64QAM |
65 |
-27 |
7.93 |
-32.39 |
7.74 |
-32.32 |
7.93 |
-31.43 |
6.92 |
-30.53 |
6.37 |
-30.26 |
6.66 |
-30.86 |
|
By the way it’s the same results by use power meter measurement.
Can someone explain to me why this happened?
