Changes between Version 9 and Version 10 of 802.11/Benchmarks/Tx_Char

Timestamp:

Dec 8, 2014, 3:54:12 PM (9 years ago)

Author:

chunter

Comment:

--

802.11/Benchmarks/Tx_Char

@@ -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.
 
-== Tx EVM ==
+== Transmit EVM ==
 
 Using the WLAN Experiments Framework, we perform the following steps:
@@ -39 +39 @@
 ||  [[Image(evm_vs_tx_power.png, width=800)]]  ||
 
-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, 
+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.
 
 
-== Tx Power Accuracy ==
+== Transmit Power Accuracy ==
+
+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.
+
+||  [[Image(tx_power_accuracy, width=800)]]  ||
+
+The above results show the measured transmit power vs. the target transmit power provided to the wlan_exp command.