intercept/templates/partials/modes/sstv-general.html

<!-- SSTV GENERAL MODE -->
<div id="sstvGeneralMode" class="mode-content">
    <div class="section">
        <h3>SSTV Decoder</h3>
        <p class="info-text" style="font-size: 11px; color: var(--text-dim); margin-bottom: 12px;">
            Decode Slow-Scan Television images on common amateur radio HF/VHF/UHF frequencies.
            Select a predefined frequency or enter a custom one.
        </p>
        <p class="info-text" style="font-size: 10px; color: var(--accent-yellow); margin-bottom: 8px;">
            Note: HF frequencies (below 30 MHz) require an upconverter with RTL-SDR.
        </p>
    </div>

    <div class="section">
        <h3>Frequency</h3>
        <div class="form-group">
            <label>Preset Frequency</label>
            <select id="sstvGeneralPresetFreq" onchange="SSTVGeneral.selectPreset(this.value)" style="width: 100%; padding: 6px 8px; font-family: var(--font-mono); font-size: 11px; background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: 4px; color: var(--text-primary);">
                <option value="">-- Select frequency --</option>
                <optgroup label="80 m (HF)">
                    <option value="3.845|lsb">3.845 MHz LSB - US calling</option>
                    <option value="3.730|lsb">3.730 MHz LSB - Europe primary</option>
                </optgroup>
                <optgroup label="40 m (HF)">
                    <option value="7.171|lsb">7.171 MHz LSB - International</option>
                    <option value="7.040|lsb">7.040 MHz LSB - Alt US/EU</option>
                </optgroup>
                <optgroup label="30 m (HF)">
                    <option value="10.132|usb">10.132 MHz USB - Narrowband</option>
                </optgroup>
                <optgroup label="20 m (HF)">
                    <option value="14.230|usb">14.230 MHz USB - Most popular</option>
                    <option value="14.233|usb">14.233 MHz USB - Digital SSTV</option>
                    <option value="14.240|usb">14.240 MHz USB - Europe alt</option>
                </optgroup>
                <optgroup label="15 m (HF)">
                    <option value="21.340|usb">21.340 MHz USB - International</option>
                </optgroup>
                <optgroup label="10 m (HF)">
                    <option value="28.680|usb">28.680 MHz USB - International</option>
                </optgroup>
                <optgroup label="6 m (VHF)">
                    <option value="50.950|usb">50.950 MHz USB - SSTV calling</option>
                </optgroup>
                <optgroup label="2 m (VHF)">
                    <option value="145.500|fm">145.500 MHz FM - Simplex</option>
                    <option value="145.880|fm">145.880 MHz FM - SONATE-2 (Martin M1)</option>
                </optgroup>
                <optgroup label="70 cm (UHF)">
                    <option value="433.775|fm">433.775 MHz FM - Simplex</option>
                </optgroup>
            </select>
        </div>
        <div class="form-group">
            <label>Frequency (MHz)</label>
            <input type="number" id="sstvGeneralFrequency" value="14.230" step="0.001" min="1" max="500">
        </div>
        <div class="form-group">
            <label>Modulation</label>
            <select id="sstvGeneralModulation" style="width: 100%; padding: 6px 8px; font-family: var(--font-mono); font-size: 11px; background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: 4px; color: var(--text-primary);">
                <option value="fm" selected>FM (Frequency Modulation)</option>
                <option value="usb">USB (Upper Sideband)</option>
                <option value="lsb">LSB (Lower Sideband)</option>
            </select>
        </div>
    </div>

    <div class="section">
        <h3>Resources</h3>
        <div style="display: flex; flex-direction: column; gap: 6px;">
            <a href="https://www.sigidwiki.com/wiki/Slow-Scan_Television_(SSTV)" target="_blank" rel="noopener" class="preset-btn" style="text-decoration: none; text-align: center;">
                SigID Wiki - SSTV
            </a>
        </div>
    </div>

    <div class="section">
        <h3>About Terrestrial SSTV</h3>
        <p class="info-text" style="font-size: 11px; color: var(--text-dim);">
            Amateur radio operators transmit SSTV images on HF bands worldwide.
            The most popular frequency is 14.230 MHz USB on the 20m band.
        </p>
        <p class="info-text" style="font-size: 11px; color: var(--text-dim); margin-top: 8px;">
            Common modes: PD120, PD180, Martin1, Scottie1, Robot36
        </p>
    </div>
</div>