diff --git a/main.c b/main.c
index 32d91b3..03ee392 100644
--- a/main.c
+++ b/main.c
@@ -1916,6 +1916,28 @@ VNA_SHELL_FUNCTION(cmd_recall)
   shell_printf("recall {id}\r\n");
 }
 
+VNA_SHELL_FUNCTION(cmd_channel)
+{
+  if (argc == 0) {
+    for (int c=0;c<3;c++){
+      shell_printf("channel[%d] : %4.1f\r\n", c+1, channel_power[c]);
+    }
+    return;
+  }
+  if (argc != 1)
+    goto usage;
+  if (argv[0][0] == '?')
+    goto usage;
+  int id = my_atoi(argv[0]);
+  if (id < 1 || id > 3)
+    goto usage;
+  id -= 1;
+  shell_printf("%4.1f\r\n",channel_power[id]);
+  return;
+ usage:
+  shell_printf("channel [1-3]\r\n");
+}
+
 const char * const trc_channel_name[TRACES_MAX] = {
   [TRACE_ACTUAL] = "MEASURED",
   [TRACE_STORED] = "STORED",
@@ -2153,6 +2175,8 @@ usage:
   shell_printf("marker [n] [%s|{freq}|{index}] [{n}|%s]\r\n", cmd_marker_list, cmd_marker_on_off);
 }
 
+
+
 VNA_SHELL_FUNCTION(cmd_touchcal)
 {
   (void)argc;
@@ -2492,6 +2516,7 @@ static const VNAShellCommand commands[] =
     {"trace"       , cmd_trace       , CMD_WAIT_MUTEX | CMD_RUN_IN_LOAD},
     {"trigger"     , cmd_trigger     , CMD_RUN_IN_LOAD},
     {"marker"      , cmd_marker      , CMD_RUN_IN_LOAD},
+    {"channel"     , cmd_channel     , CMD_WAIT_MUTEX },
 #ifdef __DRAW_LINE__
     {"line"        , cmd_line        , CMD_RUN_IN_LOAD},
 #endif
diff --git a/plot.c b/plot.c
index ca26ba5..8ffe9fe 100644
--- a/plot.c
+++ b/plot.c
@@ -1680,7 +1680,11 @@ static void cell_draw_marker_info(int x0, int y0)
       ypos = 14 - y0;
       if (setting.measurement==M_CP ) {
         float v = 100.0 * channel_power_watt[c] /(channel_power_watt[0] + channel_power_watt[1] + channel_power_watt[2]);
-        cell_printf(xpos, ypos, FONT_b"%4.1f%%", v );
+        if (c == 1)
+          cell_printf(xpos, ypos, FONT_b"%4.1f%%", v );
+        else
+          cell_printf(xpos, ypos, FONT_b"%4.1f%% %4.1fdBc", v, channel_power[c] - channel_power[1] );
+
 #ifdef __LEVEL_METER__
         if (c == 1)
            plot_printf(level_text, sizeof(level_text), "%4.1f%%", v);