diff --git a/docs/source/faq.rst b/docs/source/faq.rst
index f3e3cf3f9bfd47c4d3f3ed891d948bdabd8fa73c..971b6352ae0d6d78e605b0b7647249b28686e596 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.