Changes between Version 9 and Version 10 of 802.11/Benchmarks/Tx_Char
- Timestamp:
- Dec 8, 2014, 3:54:12 PM (9 years ago)
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802.11/Benchmarks/Tx_Char
v9 v10 26 26 The above figure shows the setup of this test. The WARP v3 kit cabled to the N4010A with 15 dB of external attenuation applied. Note: this 15dB is compensated for and is de-embedded from the below results. 27 27 28 == T xEVM ==28 == Transmit EVM == 29 29 30 30 Using the WLAN Experiments Framework, we perform the following steps: … … 39 39 || [[Image(evm_vs_tx_power.png, width=800)]] || 40 40 41 The above figure shows the results from this experiment. In all but the highest transmission powers (≤ 17dBm), our Tx EVM is better than the -25 dB tolerance specified by the standard for the highest 54 Mbps rate. For all lower rates,41 The above figure shows the results from this experiment. In all but the highest transmission powers (≤ 17dBm), our Tx EVM is better than the -25 dB tolerance specified by the standard for the highest 54 Mbps rate. Even higher transmit powers up to 21 dBm are still within tolerance for lower PHY rates. 42 42 43 43 44 == Tx Power Accuracy == 44 == Transmit Power Accuracy == 45 46 In the previous EVM experiments, you may have noticed the label on the x-axis is "target" transmit power. This is the independent variable supplied to the [https://warpproject.org/docs/mango-wlan-exp/node.html#wlan_exp.node.WlanExpNode.set_tx_power set_tx_power wlan_exp command]. The N4010A also provides an accurate measure of actual transmit power. 47 48 || [[Image(tx_power_accuracy, width=800)]] || 49 50 The above results show the measured transmit power vs. the target transmit power provided to the wlan_exp command.