Ryan Malloy
7d48398551
FM mode now has the same three-layer architecture as PM mode: - fm_mod/fm_demod for carrier-level FM modulation - fm_signal_source/fm_downlink_receiver convenience wrappers - fm_loopback_demo.py verifying round-trip SCO voltage recovery Includes GRC YAML for all 4 blocks and doc updates across blocks reference, SCO guide, and signal architecture pages.
46 lines
1.0 KiB
YAML
46 lines
1.0 KiB
YAML
id: apollo_fm_mod
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label: Apollo FM Mod
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category: '[Apollo USB]'
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flags: [python]
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parameters:
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- id: fm_deviation_hz
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label: FM Deviation (Hz)
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dtype: real
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default: '500000'
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- id: sample_rate
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label: Sample Rate
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dtype: real
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default: '5120000'
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inputs:
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- label: in
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domain: stream
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dtype: float
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outputs:
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- label: out
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domain: stream
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dtype: complex
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templates:
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imports: from apollo.fm_mod import fm_mod
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make: apollo.fm_mod.fm_mod(fm_deviation_hz=${fm_deviation_hz}, sample_rate=${sample_rate})
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documentation: |-
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Apollo FM Modulator
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Applies frequency modulation to produce complex baseband signal.
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Takes a composite modulating signal (sum of SCO subcarriers) and outputs
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an FM complex baseband where instantaneous frequency is proportional to
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the input amplitude.
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Used in FM downlink mode (pre-launch checkout), not PM mode.
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This is the transmit-side counterpart to Apollo FM Demod.
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Parameters:
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fm_deviation_hz: Max frequency deviation in Hz (default 500 kHz)
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sample_rate: Sample rate in Hz (default 5.12 MHz)
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file_format: 1
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