docs: finish the rf test comments
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@ -41,8 +41,7 @@ fn downlink() -> LinkBudget {
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fn eirp_sums_the_power_gain_and_loss() {
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let budget = downlink();
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// 10 dBW + 30 dBi - 1 dB = 39 dBW.
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// 10 dBW + 30 dBi - 1 dB = 39 dBW。
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// 10 dBW + 30 dBi - 1 dB = 39 dBW。
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// 即发射功率加发射增益再减发射损耗,得出等效全向辐射功率。
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let eirp = budget.eirp().expect("valid budget");
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assert!((eirp.dbw().expect("positive") - 39.0).abs() < TOLERANCE);
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}
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@ -66,8 +65,7 @@ fn the_carrier_power_matches_the_hand_computation() {
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let budget = downlink();
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let carrier = budget.received_power().expect("valid budget");
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// 39 dBW - 205.627 dB + 35 dBi - 0.5 dB = -132.127 dBW.
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// 39 dBW - 205.627 dB + 35 dBi - 0.5 dB = -132.127 dBW。
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// 39 dBW - 205.627 dB + 35 dBi - 0.5 dB = -132.127 dBW。
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// 即从等效全向辐射功率减去路径损耗、加上接收增益、再减接收损耗。
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assert!(
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(carrier.dbw().expect("positive") + 132.127_080_075_172_1).abs() < 1e-9,
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"{}",
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@ -44,8 +44,7 @@ fn path_loss_matches_the_engineering_form() {
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// 链路预算中所用的形式,距离以千米、频率以兆赫兹计,
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//
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// L = 32.44 + 20 log10(d_km) + 20 log10(f_MHz)
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// L = 32.44 + 20 log10(d_km) + 20 log10(f_MHz)
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// L = 32.44 + 20 log10(d_km) + 20 log10(f_MHz)
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// 即以千米计的距离与以兆赫兹计的频率表示的工程形式。
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//
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// has a constant that follows from the speed of light rounded to
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// 299 792 458 m/s, and agrees with the expression used here to the
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