RF Signal-to-Noise Ratio (SNR) Calculator
.calc-header {
margin-bottom: 30px;
padding: 25px;
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
border-radius: 12px;
box-shadow: 0 4px 6px rgba(0,0,0,0.1);
color: white;
}
.calc-header h2 {
margin-top: 0;
color: white;
font-size: 28px;
margin-bottom: 10px;
}
.calc-header p {
margin: 10px 0;
opacity: 0.95;
font-size: 15px;
}
.form-group {
margin-top: 20px;
}
.form-row {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 15px;
margin-bottom: 15px;
}
.input-wrapper {
display: flex;
flex-direction: column;
}
.input-label {
font-size: 14px;
font-weight: 600;
margin-bottom: 8px;
color: white;
opacity: 0.95;
}
.calc-input {
padding: 14px;
font-size: 16px;
border: 2px solid rgba(255,255,255,0.3);
border-radius: 6px;
font-family: 'Courier New', monospace;
background: rgba(255,255,255,0.95);
transition: all 0.3s ease;
color: #333;
}
.calc-input:focus {
outline: none;
border-color: #4CAF50;
background: white;
box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}
.calc-button {
padding: 14px 35px;
font-size: 16px;
background: #4CAF50;
color: white;
border: none;
border-radius: 6px;
cursor: pointer;
font-weight: bold;
transition: all 0.3s ease;
box-shadow: 0 2px 4px rgba(0,0,0,0.2);
margin-top: 15px;
min-width: 150px;
}
.calc-button:hover {
background: #45a049;
transform: translateY(-1px);
box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}
.calc-button:active {
background: #3d8b40;
transform: translateY(0);
}
.result-section {
background: white;
border: 1px solid #e0e0e0;
border-radius: 8px;
margin-top: 30px;
overflow: hidden;
box-shadow: 0 2px 4px rgba(0,0,0,0.05);
transition: all 0.3s ease;
display: none;
}
.result-section.show {
display: block;
}
.result-section:hover {
box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.section-header {
background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
color: white;
padding: 15px 20px;
display: flex;
justify-content: space-between;
align-items: center;
user-select: none;
}
.section-header h3 {
margin: 0;
font-size: 18px;
display: flex;
align-items: center;
gap: 10px;
}
.section-header .icon {
font-size: 20px;
}
.section-content {
padding: 20px;
background: #fafafa;
}
.data-row {
display: flex;
margin: 12px 0;
padding: 10px;
background: white;
border-radius: 4px;
border-left: 3px solid #4CAF50;
}
.data-label {
font-weight: bold;
color: #555;
min-width: 180px;
flex-shrink: 0;
}
.data-value {
color: #333;
font-family: 'Courier New', monospace;
word-break: break-word;
}
.data-value.highlight {
color: #4CAF50;
font-weight: bold;
font-size: 18px;
}
.result-alert {
padding: 15px 20px;
border-radius: 8px;
border-left: 4px solid;
margin: 15px 0;
display: flex;
align-items: flex-start;
gap: 15px;
}
.result-alert.success {
background: #e8f5e9;
border-color: #4CAF50;
color: #2e7d32;
}
.result-alert.warning {
background: #fff3e0;
border-color: #ff9800;
color: #e65100;
}
.result-alert.error {
background: #ffebee;
border-color: #f44336;
color: #c62828;
}
.result-icon {
font-size: 28px;
flex-shrink: 0;
}
.result-content {
flex: 1;
}
.result-title {
font-weight: bold;
font-size: 16px;
margin-bottom: 8px;
}
.result-details {
font-size: 14px;
line-height: 1.6;
}
.help-text {
margin-top: 15px;
font-size: 14px;
color: rgba(255,255,255,0.9);
background: rgba(0,0,0,0.1);
padding: 10px 15px;
border-radius: 4px;
}
.help-text strong {
color: white;
}
.info-section {
margin-top: 30px;
padding: 20px;
background: white;
border-radius: 8px;
box-shadow: 0 2px 4px rgba(0,0,0,0.05);
border-top: 3px solid #4CAF50;
}
.info-section h4 {
margin-top: 0;
color: #333;
font-size: 16px;
}
.info-section p {
color: #666;
font-size: 14px;
line-height: 1.6;
margin: 10px 0;
}
.snr-table {
width: 100%;
margin-top: 15px;
border-collapse: collapse;
}
.snr-table th,
.snr-table td {
padding: 10px;
text-align: left;
border-bottom: 1px solid #e0e0e0;
}
.snr-table th {
background: #f5f5f5;
font-weight: bold;
color: #555;
}
.snr-table td:first-child {
font-family: 'Courier New', monospace;
font-weight: bold;
}
/* Responsive design */
@media (max-width: 768px) {
.form-row {
grid-template-columns: 1fr;
}
.data-row {
flex-direction: column;
}
.data-label {
margin-bottom: 5px;
min-width: auto;
}
.calc-button {
width: 100%;
}
}
射频信噪比计算器
计算信噪比 (SNR) 以确定无线信号质量并预测设备连接问题。
笔记：SNR 的计算方式为“信号 - 噪声”。值越高表示信号质量越好。为了实现可靠的无线连接，建议最小 SNR 为 15-20 dB。
📊结果
了解信噪比 (SNR)
信噪比是无线通信中的一个关键指标，用于测量所需信号相对于背景噪声的强度。 它是通过从信号强度（均以 dBm 为单位）中减去噪声水平来计算的。
SNR 质量指南：
| 信噪比范围 | 质量 | 预期表现 |
|---|---|---|
| 40+分贝 | 出色的 | 最大吞吐量，无丢包 |
| 25-40分贝 | 非常好 | 高吞吐量，最少的问题 |
| 15-25分贝 | 好的 | 连接可靠，吞吐量适中 |
| 10-15分贝 | 公平的 | 基本连接，可能丢包 |
| 5-10分贝 | 贫穷的 | 连接不稳定，经常掉线 |
| < 5 分贝 | 很差 | 无法使用，连接失败 |