katgpucbf.spead module

Common SPEAD-related constants and helper function.

katgpucbf.spead.ADC_SAMPLES_ID = 13056: SPEAD ID of adc_samples item (digitiser data)

katgpucbf.spead.BEAM_ANTS_ID = 20484: SPEAD ID of beam_ants item

katgpucbf.spead.BF_RAW_ID = 20480: SPEAD ID of bf_raw item

katgpucbf.spead.DEFAULT_PORT = 7148: Default UDP port

katgpucbf.spead.DIGITISER_ID_ID = 12545: SPEAD ID of digitiser_id item

katgpucbf.spead.DIGITISER_STATUS_ID = 12546: SPEAD ID of digitiser_status item

katgpucbf.spead.DIGITISER_STATUS_SATURATION_COUNT_SHIFT = 32: First bit position in digitiser status SPEAD item for ADC saturation count

katgpucbf.spead.DIGITISER_STATUS_SATURATION_FLAG_BIT = 1: Bit position in digitiser_status SPEAD item for ADC saturation flag

katgpucbf.spead.FENG_ID_ID = 16641: SPEAD ID of feng_id item

katgpucbf.spead.FENG_RAW_ID = 17152: SPEAD ID of feng_raw item

katgpucbf.spead.FLAVOUR = <spead2._spead2.Flavour object>: SPEAD flavour used for all send streams

katgpucbf.spead.FREQUENCY_ID = 16643: SPEAD ID of frequency item (which is actually a channel number).

katgpucbf.spead.IMMEDIATE_DTYPE = dtype('>u8'): dtype for items that need to be immediate yet passed by reference

katgpucbf.spead.IMMEDIATE_FORMAT = [('u', 48)]: Format for immediate items

katgpucbf.spead.MAX_PACKET_SIZE = 8872: Maximum packet size to send (only used for descriptors)

katgpucbf.spead.TIMESTAMP_ID = 5632: SPEAD ID of timestamp item (number of ADC samples since the sync epoch)

katgpucbf.spead.XENG_RAW_ID = 6144: SPEAD ID of xeng_raw item

katgpucbf.spead.make_immediate(id: int, value: Any) → Item[source]

Synthesize an immediate item.

Parameters:

id – The SPEAD identifier for the item
value – The value of the item