From 91ad2bc6006606d10eb27b7cc0b85acc7e0b77e3 Mon Sep 17 00:00:00 2001 From: Robert Jordens Date: Wed, 7 Jun 2017 09:13:01 +0200 Subject: [PATCH] sawg: add note about disabled q-exchange --- artiq/coredevice/sawg.py | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/artiq/coredevice/sawg.py b/artiq/coredevice/sawg.py index 1f8bf8e4a..674fd671e 100644 --- a/artiq/coredevice/sawg.py +++ b/artiq/coredevice/sawg.py @@ -82,6 +82,10 @@ class Config: Refer to the documentation of :class:`SAWG` for a mathematical description of ``i_enable`` and ``q_enable``. + .. note:: Quadrature data from the buddy channel is currently + ignored in the SAWG gateware and not added to the DAC output. + This is equivalent to the ``q_enable`` switch always being ``0``. + :param i_enable: Controls adding the in-phase DUC-DDS data of *this* SAWG channel to *this* DAC channel. Default: ``1``. @@ -221,6 +225,10 @@ class SAWG: distinguishing upper and lower sidebands and thus doubling the bandwidth. They can also be used to emit four-tone signals. + .. note:: Quadrature data from the buddy channel is currently + ignored in the SAWG gateware and not added to the DAC output. + This is equivalent to the ``q_enable`` switch always being ``0``. + The configuration channel and the nine :class:`artiq.coredevice.spline.Spline` interpolators are accessible as attributes: