Can the TX1 be used with only 1 antenna?

I see the module has two antenna connectors, for the Broadcom BCM4354XKUBG Wi-Fi / BT solution. Is one antenna for WiFi and the other for BT? Or are both antennas for both wireless links? Will WiFi work normally if only one antenna is connected?

Both antenna connectors J8 and J9 are for WiFi 2x2 MIMO, J9 is also for BT alternatively. WiFi can work with only one antenna.

i’m using my tx1 at home within 25ft of the router and wifi works with no antenna attached. a speedtest shows it up/down speeds @ my isp package maximum.

Both J8 and J9 are 2.4GHz/5GHz ANT.
BT RF was routed to J9.
J9 ANT is must have and J8 ANT could be removed if don’t want to support WIFI MIMO.
The WIFI/BT should be able to work but don’t have good performance without antenna attached.

My TX1 Wlan0 doesn’t work!

Below are some information that might help:

ubuntu@tegra-ubuntu:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:04:4b:63:58:16
inet addr: Bcast: Mask:
inet6 addr: fe80::204:4bff:fe63:5816/64 Scope:Link
RX packets:184 errors:0 dropped:0 overruns:0 frame:0
TX packets:123 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:16810 (16.8 KB) TX bytes:22338 (22.3 KB)

lo Link encap:Local Loopback
inet addr: Mask:
inet6 addr: ::1/128 Scope:Host
RX packets:804 errors:0 dropped:0 overruns:0 frame:0
TX packets:804 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:64004 (64.0 KB) TX bytes:64004 (64.0 KB)

ubuntu@tegra-ubuntu:~$ iwconfig
rmnetctl no wireless extensions.

eth0 no wireless extensions.

wlan0 IEEE 802.11bg ESSID:off/any
Mode:Managed Access Point: Not-Associated
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:on

dummy0 no wireless extensions.

ip6tnl0 no wireless extensions.

sit0 no wireless extensions.

lo no wireless extensions.

tunl0 no wireless extensions.

ubuntu@tegra-ubuntu:~ sudo iw dev wlan0 scan [sudo] password for ubuntu: command failed: Network is down (-100) ubuntu@tegra-ubuntu:~ sudo ifconfig wlan0 up
SIOCSIFFLAGS: Operation not permitted
ubuntu@tegra-ubuntu:~ ifconfig wlan0 up SIOCSIFFLAGS: Operation not permitted ubuntu@tegra-ubuntu:~

I’m not a wireless guy, I tend to use only wired. What sticks out though is that loopback had errors…this doesn’t even go through a network adapter, so something is really wrong. The operation not permitted makes me wonder if firmware or kernel features are missing…missing kernel features might explain loopback failure.

Can you describe any physical network cabling on the Jetson, attached devices (e.g., PCIe or USB), and give details about what version of L4T is on this Jetson, along with how it was flashed if this isn’t an original install?

I am having issues with larger than expected latency over wifi with both my TX1’s.

I am using a Dell XPS15 with a 802.11bgn wireless card through a AC3200 ultra wi-fi router to ping the TX1. The latency fluctuates wildly between 5ms and 500ms.

When I ping my co-workers laptop who has a older dell with a 802.11bgn card I get 4ms to 12ms

I’ve tried different antenna configurations and various other driver related fixes but to no avail. Is this just the speed I should expect? Or am I missing something?