From e009eee0bf82baa5e452346dc104dfe7999082a8 Mon Sep 17 00:00:00 2001 From: David Shah Date: Sat, 24 Dec 2016 13:37:12 +0000 Subject: [PATCH] Update Errata after more testing --- hardware/ERRATA.md | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/hardware/ERRATA.md b/hardware/ERRATA.md index cb275ce..eaf9718 100644 --- a/hardware/ERRATA.md +++ b/hardware/ERRATA.md @@ -7,4 +7,8 @@ dongle. Ideally another connector should be used. - Trace widths will need to be adjusted to meet impedance requirements depending on your stackup. `rftool_impedances.png` shows impedance control requirements. Green is 50Ω single ended; blue is 50Ω differential and yellow is 75Ω differential. The USB 3 pairs were not included in this diagram but should be 100Ω differential. - + - It is not possible to use both receive channels simultaneously as channel 1 uses ports 1A and 1B; whereas 2 uses port 2C + and the AD9361 does not support using different port letters at the same time. Ideally the design should be changed + so the second LNA connects to 2B; or the first LNA connects to 1C. + - The ENABLE pin of the Skyworks LNAs (pin 6 of U2 and U21) is active low but was mistakenly connected to +3V rather than + ground. Cutting the trace going to this pin enables the LNAs to work properly.