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sawg: add note about disabled q-exchange

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Robert Jördens 2017-06-07 09:13:01 +02:00
parent 94273e9455
commit 91ad2bc600
1 changed files with 8 additions and 0 deletions
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artiq/coredevice/sawg.py
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@ -82,6 +82,10 @@ class Config:
Refer to the documentation of :class:`SAWG` for a mathematical Refer to the documentation of :class:`SAWG` for a mathematical
description of ``i_enable`` and ``q_enable``. 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 :param i_enable: Controls adding the in-phase
DUC-DDS data of *this* SAWG channel to *this* DAC channel. DUC-DDS data of *this* SAWG channel to *this* DAC channel.
Default: ``1``. Default: ``1``.
@ -221,6 +225,10 @@ class SAWG:
distinguishing upper and lower sidebands and thus doubling the bandwidth. distinguishing upper and lower sidebands and thus doubling the bandwidth.
They can also be used to emit four-tone signals. 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 The configuration channel and the nine
:class:`artiq.coredevice.spline.Spline` interpolators are accessible as :class:`artiq.coredevice.spline.Spline` interpolators are accessible as
attributes: attributes: