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doc: clarify urukul attenuator behavior
Closes #1386 Signed-off-by: Fabian Schmid <fabian.schmid@mpq.mpg.de>
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@ -684,6 +684,8 @@ class AD9910:
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def set_att_mu(self, att):
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"""Set digital step attenuator in machine units.
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This method will write the attenuator settings of all four channels.
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.. seealso:: :meth:`artiq.coredevice.urukul.CPLD.set_att_mu`
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:param att: Attenuation setting, 8 bit digital.
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@ -694,6 +696,8 @@ class AD9910:
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def set_att(self, att):
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"""Set digital step attenuator in SI units.
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This method will write the attenuator settings of all four channels.
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.. seealso:: :meth:`artiq.coredevice.urukul.CPLD.set_att`
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:param att: Attenuation in dB.
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@ -113,6 +113,8 @@ class AD9912:
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def set_att_mu(self, att):
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"""Set digital step attenuator in machine units.
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This method will write the attenuator settings of all four channels.
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.. seealso:: :meth:`artiq.coredevice.urukul.CPLD.set_att_mu`
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:param att: Attenuation setting, 8 bit digital.
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@ -123,6 +125,8 @@ class AD9912:
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def set_att(self, att):
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"""Set digital step attenuator in SI units.
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This method will write the attenuator settings of all four channels.
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.. seealso:: :meth:`artiq.coredevice.urukul.CPLD.set_att`
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:param att: Attenuation in dB. Higher values mean more attenuation.
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@ -288,7 +288,8 @@ class CPLD:
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def set_att_mu(self, channel, att):
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"""Set digital step attenuator in machine units.
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This method will write the attenuator settings of all four channels.
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This method will also write the attenuator settings of the three other channels. Use
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:meth:`get_att_mu` to retrieve the hardware state set in previous experiments.
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:param channel: Attenuator channel (0-3).
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:param att: Digital attenuation setting:
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@ -315,6 +316,10 @@ class CPLD:
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def set_att(self, channel, att):
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"""Set digital step attenuator in SI units.
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This method will write the attenuator settings of all four channels.
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.. seealso:: :meth:`set_att_mu`
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:param channel: Attenuator channel (0-3).
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:param att: Attenuation setting in dB. Higher value is more
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attenuation. Minimum attenuation is 0*dB, maximum attenuation is
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@ -326,6 +331,8 @@ class CPLD:
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def get_att_mu(self):
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"""Return the digital step attenuator settings in machine units.
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The result is stored and will be used in future calls of :meth:`set_att_mu`.
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:return: 32 bit attenuator settings
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"""
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self.bus.set_config_mu(SPI_CONFIG | spi.SPI_INPUT, 32,
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