Problems with getting position readings from a quadrature encoder

[sarrfar]

I am using an NI cDAQ-9184 with the NI 9411 module to read a quadrature encoder using the nidaqmx python package, but I can't seem to figure out how to get position readings from it. I have a voltage pulse signal wired into the 9411 to act as my external sample clock, and the sample timestamps seem to be right, but I seem to be getting edge counts or something rather than actual angular position measurements. I'm assuming I need to use some other piece of the library to convert to position, but I can't seem to figure that part out. I would welcome any help!

task_a = nidaqmx.Task()
sample_rate = 2000 # Hz
n_tot = sample_rate*seconds_to_record
data_matrix = np.zeros((n_tot,))

task_a.ci_channels.add_ci_ang_encoder_chan(
    counter="cDAQ9184-1C3169FMod3/ctr0",
    name_to_assign_to_channel="encoder 1",
    decoding_type=nidaqmx.constants.EncoderType.X_1,
    zidx_enable=True,
    units=nidaqmx.constants.AngleUnits.DEGREES,
    pulses_per_rev=4096
)

task_a.timing.cfg_samp_clk_timing(
    rate=sample_rate,
    source="/cDAQ9184-1C3169FMod3/PFI3",  
    sample_mode=AcquisitionType.CONTINUOUS,
    samps_per_chan=sample_rate*seconds_to_record
)

print("beginning data collection. time of collection is approx ", seconds_to_record, " seconds.")

task_a.start()
stream = stream_readers.CounterReader(task_a.in_stream)

stream.read_many_sample_double(
    data=data_matrix,
    number_of_samples_per_channel=n_tot
)

task_a.stop()
task_a.close()