diff --git a/frontend/index.html b/frontend/index.html
index 6f8d9b6..61a935d 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -2158,7 +2158,10 @@ function onBerSubTypeChange(sel) {
 	} else if (st === 'custom') {
 		body.innerHTML = `<input class="ber-hex w-full font-mono text-xs border border-gray-300 dark:border-slate-600 rounded px-1 py-1 dark:bg-slate-700 dark:text-slate-300" placeholder="hex" oninput="updateBerRow(this)">`;
 	} else {
-		body.innerHTML = buildBerPcHtml();
+		const row = sel.closest('.ber-row');
+		const type = row.querySelector('.ber-type').value;
+		const allowed = type === 'error' ? ['display','tone'] : undefined;
+		body.innerHTML = buildBerPcHtml(allowed);
 		const pc = body.querySelector('.ber-pc');
 		berPopulateDevices(pc);
 		onBerPcTypeChange(pc.querySelector('.ber-pc-type'));