AD9858 PHASE_MODE_CONTINUOUS broken

[m-labs]

AD9858 PHASE_MODE_CONTINUOUS broken

Here's a clearer illustration.

class TestDDSPhase(Experiment, AutoDB):
    class DBKeys:
        core = Device()
        dds_bus = Device()
        dds0 = Device()
        dds1 = Device()
        ttl0 = Device()
        ttl1 = Device()

    @kernel
    def run(self):
        self.dds0.set_phase_mode(PHASE_MODE_CONTINUOUS)
        self.dds1.set_phase_mode(PHASE_MODE_CONTINUOUS)
        for i in range(10):
            # force DDSs to be phase synchronized at outset of experiment
            # this is a temporary override of the default phase mode
            with self.dds_bus.batch:
                self.dds0.set(3*MHz, phase_mode=PHASE_MODE_ABSOLUTE, phase_offset=0)
                self.dds1.set(3*MHz, phase_mode=PHASE_MODE_ABSOLUTE, phase_offset=0)

            # emit experiment start pulse on TTL0
            self.ttl0.pulse(1*us)

            # demonstrate simple spin-echo type pulse sequence
            # self.dds0.set(3*MHz, phase_offset=0, phase_mode=PHASE_MODE_CONTINUOUS)
            self.ttl1.pulse(.5*us) # first pi/2 pulse
            self.dds0.set(3*MHz, phase_offset=0.25, phase_mode=PHASE_MODE_CONTINUOUS)

            delay(1*us) # arm time

            self.ttl1.pulse(1*us) # middle pi pulse
            self.dds0.set(3*MHz, phase_offset=0, phase_mode=PHASE_MODE_CONTINUOUS)

            delay(1*us) # arm time

            self.ttl1.pulse(0.5*us) # final pi/2 pulse

            # delay to let Core_uP catch up
            delay(1*ms)

Quick test to see if this behavior is related to the timing of the FTW.

1. reset power on DDS box and reset DDS
2. run program above
3. look on scope

[sbourdeauducq]

Do you still have any issue with a board flashed with the latest runtime from the conda packages? I pushed the bugfixes only recently. Do you have this commit: 87ea143

I will try to two suggestions you made. It will be a day or two. We are
back running on the old DDS system at the moment. -Joe

On Mon, Jun 22, 2015 at 3:39 PM, Sébastien Bourdeauducq <
[email protected]> wrote:

Do you still have any issue with a board flashed with the latest runtime
from the conda packages? I pushed the bugfixes only recently. Do you have
this commit: 87ea143
87ea143

—
Reply to this email directly or view it on GitHub
#46 (comment).

OK. Resolved in today's conda build.

[sbourdeauducq]

Good. Thanks for the quick re-test!