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Switching frequencies 230/345 GHz

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    Combined revision comparison

    Comparing version 14:56, 2 Apr 2024 by rottmann with version 15:02, 2 Apr 2024 by rottmann.

    ...

    Downconversion setup

    The LO frequency of the DBBC3 has to be changed to match the hardware filters.

    The LO-frequencies for the four bands are defined in /etc/backend.conf:

    dbbc3.all: {layout: dbbc3, hostname: dbbc3, port: 4000, mode: "OCT_D", sw_major: 120, sw_minor: 220831,
          boardA: {bitfile: "dbbc3_oct_D_2hv2_221122.bit", filter1: "2000-4000_64taps.flt", filter2: "0-2000_64taps.flt", synth_freq: 9048},
          boardB: {bitfile: "dbbc3_oct_D_2hv2_221122.bit", filter1: "2000-4000_64taps.flt", filter2: "0-2000_64taps.flt", synth_freq: 9048},
          boardC: {bitfile: "dbbc3_oct_D_2hv2_221122.bit", filter1: "2000-4000_64taps.flt", filter2: "0-2000_64taps.flt", synth_freq: 9048},
          boardD: {bitfile: "dbbc3_oct_D_2hv2_221122.bit", filter1: "2000-4000_64taps.flt", filter2: "0-2000_64taps.flt", synth_freq: 9048},
    ...

    The correct setting is depending on the observing frequency:

    Freq DBBC3 LO setting
    230 GHz 9048
    345 GHz 8048

    Version from 14:56, 2 Apr 2024

    This revision modified by rottmann (Ban)

    ...

    Version as of 15:02, 2 Apr 2024

    This revision modified by rottmann (Ban)

    ...

    Downconversion setup

    The LO frequency of the DBBC3 has to be changed to match the hardware filters.

    The LO-frequencies for the four bands are defined in /etc/backend.conf:

    dbbc3.all: {layout: dbbc3, hostname: dbbc3, port: 4000, mode: "OCT_D", sw_major: 120, sw_minor: 220831,
          boardA: {bitfile: "dbbc3_oct_D_2hv2_221122.bit", filter1: "2000-4000_64taps.flt", filter2: "0-2000_64taps.flt", synth_freq: 9048},
          boardB: {bitfile: "dbbc3_oct_D_2hv2_221122.bit", filter1: "2000-4000_64taps.flt", filter2: "0-2000_64taps.flt", synth_freq: 9048},
          boardC: {bitfile: "dbbc3_oct_D_2hv2_221122.bit", filter1: "2000-4000_64taps.flt", filter2: "0-2000_64taps.flt", synth_freq: 9048},
          boardD: {bitfile: "dbbc3_oct_D_2hv2_221122.bit", filter1: "2000-4000_64taps.flt", filter2: "0-2000_64taps.flt", synth_freq: 9048},
    ...

    The correct setting is depending on the observing frequency:

    Freq DBBC3 LO setting
    230 GHz 9048
    345 GHz 8048