urukul: mention min/max attenuation

Signed-off-by: Robert Jördens <rj@quartiq.de>
2018-11-09 13:32:05 +01:00 · 2018-11-09 13:32:05 +01:00 · 38c6878d49
parent e565ca6b82
commit 38c6878d49
1 changed files with 2 additions and 1 deletions
--- a/artiq/coredevice/urukul.py
+++ b/artiq/coredevice/urukul.py
@ -300,7 +300,8 @@ class CPLD:

        :param channel: Attenuator channel (0-3).
        :param att: Attenuation setting in dB. Higher value is more
-            attenuation.
+            attenuation. Minimum attenuation is 0*dB, maximum attenuation is
+            31.5*dB.
        """
        self.set_att_mu(channel, 255 - int32(round(att*8)))