adc_power_meter

Overview

Controls the power calculations of the ADC channels.

Python Class & Methods Index

class pyfabil.plugins.tpm.adc_power_meter.AdcPowerMeter(board, fsample=800000000.0, samples_per_frame=864, **kwargs)

Total power meter and RFI detector The total power meter measures the broadband total power level for the input signals. Total power integration time is programmable Integration time is expressed in seconds, total power is returned in ADC counts squared, RMS in ADC counts

Specific methods: initialise(): Initialises everything. Device left with: 10 ms integration time, TP running, no RFI removing

set_intTime(intTime) Sets integration time. Does not modify running status Integration time in seconds (min. 2 us, max 0.05 s)

start_IntTime(intTime) Stops integration, changes integration time and restarts it

start_TP(), stop_TP() Starts and stops TP. Synchronous start not yet supported

enable_rfi_flagging(antennas), disable_rfi_flagging() enables/disables RFI flagging. antennas is a list of antennas where rfi flagging is enabled/disabled

set_broadband_rfi_factor(rfi_factor) sets the rfi factor to control how much RFI flagging occurs.

wait_TpReady() If TP is running, waits for data to become ready. Else returns False

read_TpData() Reads the TP data if ready, else returns empty list

wait_TpData() Waits for data to become ready and returns them. Returns empty list if TP not running

get_RmsAmplitude() Same of wait_TpData(), but returns RMS amplitude instead of power

read_RfiData(): Returns number of RFI affected frames

clean_up()

Perform cleanup :return: Success

disable_rfi_flagging(antennas=range(0, 8))

disables the broadband RFI flagging

Parameters:

antennas (list(int)) – list antennas where rfi will be enabled

enable_rfi_flagging(antennas=range(0, 8))

enables the broadband RFI flagging

Parameters:

antennas (list(int)) – list antennas where rfi will be disabled

get_RmsAmplitude(sync=True)

initialise()

Initialise AdcPowerMeter

read_RfiData()

read_TpData()

Read total power data if available Returns empty array if no power is available Output is in units of ADC units squared

read_data()

set_broadband_rfi_factor(rfi_factor=1.0)

Sets the rfi factor for broadband rfi detection, the higher the rfi factor the less rfi is detected/flagged

This is because data is flagged if the short term power is greater than the long term power * rfi factor * 32/27

Parameters:

rfi_factor (double) – the sensitivity value for the rfi detection

set_intTime(integrationTime)

Set integration time and discard bits. Integration time in seconds

start_TP(sync_time=None)

Starts total power detector at predefined frame time

start_intTime(intTime)

status_check()

Abstract method where all status checks should be performed :return: Firmware status

stop_TP()

Stops total power detector

wait_TpData()

Wait TP data to be available and return it Return False if TP detector is not programmed Output is in units of ADC units squared

wait_TpReady()