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.
61 lines
1.6 KiB
YAML
61 lines
1.6 KiB
YAML
id: apollo_fm_signal_source
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label: Apollo FM Signal Source
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category: '[Apollo USB]'
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flags: [python]
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parameters:
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- id: channels
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label: SCO Channels
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dtype: raw
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default: '[1, 5, 9]'
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- id: test_voltages
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label: Test Voltages (dict)
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dtype: raw
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default: 'None'
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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 (Hz)
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dtype: float
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default: '5120000'
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- id: snr_db
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label: SNR (dB)
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dtype: raw
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default: 'None'
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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_signal_source import fm_signal_source
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make: >-
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apollo.fm_signal_source.fm_signal_source(
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channels=${channels},
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test_voltages=${test_voltages},
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sample_rate=${sample_rate},
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fm_deviation_hz=${fm_deviation_hz},
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snr_db=${snr_db})
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documentation: |-
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Apollo FM Signal Source -- complete FM transmit chain in one block.
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Generates an FM-modulated complex baseband signal containing
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SCO analog telemetry channels. Each channel encodes a DC test
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voltage as an FM subcarrier tone (14.5 kHz to 165 kHz).
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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 the FM Downlink Receiver.
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Parameters:
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channels: List of SCO channel numbers to generate (1-9)
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test_voltages: Dict mapping channel -> DC voltage (default 2.5V)
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fm_deviation_hz: Carrier FM deviation in Hz (default 500 kHz)
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sample_rate: Output sample rate (default 5.12 MHz)
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snr_db: Add AWGN noise at this SNR (None = no noise)
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file_format: 1
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