Changes between Version 8 and Version 9 of Hardware/FR3
- Timestamp:
- Aug 16, 2025, 10:44:06 AM (3 weeks ago)
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Hardware/FR3
v8 v9 30 30 * High LO Frequency (GHz) — sets the “high-side” LO. 31 31 Use the numeric box for fine increments and the slider for coarse moves. Together, these LOs place the desired FR3 RF channel while keeping IF in the supported sub-6 GHz range. 32 32 33 [[Image(pi-frequency.png, 600px)]] 33 34 34 35 * Filters panel: Per-chain drop-downs select the active RF/IF path for RX0, RX1, TX0, and TX1. The bypass option routes around the filter network; select a non-bypass entry to engage the appropriate bandpass path for that chain. 36 35 37 [[Image(pi-filters.png, 600px)]] 36 38 … … 38 40 [[Image(pi-gain.png, 600px)]] 39 41 40 * LO Supression: DC bias trims for the I and Q paths on each TX chain (TX0 I/Q bias, TX1 I/Q bias, in volts). Small adjustments here null residual LO feed-through and balance IQ, reducing the tone at the carrier when the transmitter is idle. Start near 0 V and sweep slowly while observing the carrier leakage. 42 * LO Supression: DC bias trims for the I and Q paths on each TX chain (TX0 I/Q bias, TX1 I/Q bias, in volts). Small adjustments here null residual LO feed-through and balance IQ, reducing the tone at the carrier when the transmitter is idle. Start near 0 V and sweep slowly while observing the carrier leakage. 43 41 44 [[Image(pi-suppression.png, 600px)]] 42 45 … … 46 49 * Disable Input 20 dB Attenuator — toggles the on-board input pad; uncheck to insert 20 dB of protection when measuring strong signals. 47 50 * Reset LMX button — re-initializes the LO synthesizer(s) to recover from configuration changes. 51 48 52 [[Image(pi-control.png, 600px)]] 49 53