Search found 7 matches

by espola
Thu Oct 05, 2017 7:55 am
Forum: Hardware
Topic: Wi-Fi RF characteristics are not stable over temperature variations
Replies: 3
Views: 6793

Wi-Fi RF characteristics are not stable over temperature variations

Hello, when testing RF tx characteristics at different temperatures we see that the output power and EVM values drift out of spec. Ambient temperature changes and/or heavy RF activity will cause this. We test temperatures from -40C to +85C. If the device is reset RF calibration is done and character...
by espola
Thu Oct 05, 2017 7:49 am
Forum: Hardware
Topic: controller_hci_uart RF characterstics
Replies: 0
Views: 2901

controller_hci_uart RF characterstics

Hello, when testing the Bluetooth RF characteristics using the controller_hci_uart application and the device under test mode, the results vary between different test iterations and also test cases fail. To initiate device under test mode we run the following HCI command sequence: HCI_Reset HCI_Set_...
by espola
Fri Jun 02, 2017 1:34 pm
Forum: ESP-IDF
Topic: esptool load_ram
Replies: 1
Views: 4093

esptool load_ram

Hi All! Is the esptool load_ram option working? During rf verification in production I would like to run the rf verification fw from RAM instead of flash. This would also be my preferred way of running rf verification for devices returned from customers. However if I try to use the load_ram option I...
by espola
Wed Feb 15, 2017 2:52 pm
Forum: Hardware
Topic: Testing with Anritsu MT8860C
Replies: 1
Views: 4320

Testing with Anritsu MT8860C

I want to use an Anritsu MT8860C to verify the the rf settings by measuring output power and EVM values for different rates. However, when testing using the Anritsu MT8860C the esp32 will not follow the supported rates information element (IE) set in the AP beacon. The supported rates IE is the way ...
by espola
Wed Feb 15, 2017 2:36 pm
Forum: Hardware
Topic: Backoff power configuration
Replies: 1
Views: 4521

Backoff power configuration

Hello! How shall the power back off configuration parameters be used? For band edge compliance I need to lower the output power on the lowest and top channels but I can't measure any difference when I change the backoff settings. For testing backoff configurations I have used channel 13. I enable ba...
by espola
Wed Feb 15, 2017 1:17 pm
Forum: Hardware
Topic: RF settings used by ESP32_FCC_WIFI_BT_20161129.bin
Replies: 2
Views: 5775

Re: RF settings used by ESP32_FCC_WIFI_BT_20161129.bin

Ok thanks,
it also seems like the settings file generated by the flash tool is not accepted by applications built using the esp-idf so I will drop this issue.
by espola
Thu Feb 02, 2017 4:54 pm
Forum: Hardware
Topic: RF settings used by ESP32_FCC_WIFI_BT_20161129.bin
Replies: 2
Views: 5775

RF settings used by ESP32_FCC_WIFI_BT_20161129.bin

Hello! How are the rf settings used by the fcc test application changed? It seems like the ESP32_FCC_WIFI_BT_20161129.bin application only works if loaded to address 0x1000 and no secondary bootloader being used. The older ESP32_FCC_WIFI_20161010.bin is starting when I try a configuration with a boo...