From c7420dc6a8292f334dec690354cd634ccbfd9cd8 Mon Sep 17 00:00:00 2001
From: Jan David Mol <mol@astron.nl>
Date: Sun, 10 Oct 2021 19:28:32 +0200
Subject: [PATCH] L2SS-434: Mention waveform generator as reason for no
 statistics

---
 docs/source/faq.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/docs/source/faq.rst b/docs/source/faq.rst
index f3e3cf3f9..971b6352a 100644
--- a/docs/source/faq.rst
+++ b/docs/source/faq.rst
@@ -36,6 +36,7 @@ Some SSTs/XSTs packets do arrive, but not all, and/or the matrices remain zero?
 So ``sst.nof_packets_received`` / ``xst.nof_packets_received`` is increasing, telling you packets are arriving. But they're apparently dropped or contain zeroes. First, check the following settings:
 
 - ``sdp.TR_fpga_mask_RW[x] == True``, to make sure we're actually configuring the FPGAs,
+- ``sdp.FPGA_wg_enable_RW[x] == False``, or the Waveform Generator might be replacing our the antenna data with zeroes,
 - ``sdp.FPGA_processing_enabled_R[x] == True``, to verify that the FPGAs are processing, or the values and timestamps will be zero,
 - For XSTs, ``xst.FPGA_xst_processing_enabled_R[x] == True``, to verify that the FPGAs are computing XSTs, or the values will be zero.
 
-- 
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