Update operating-instructions.md

operating-instructions.md

@@ -29,7 +29,7 @@ As the BFO signal is now generated by the si5351, the received audio may initial
 
 Optionally install a 10K or 100K linear potentiometer on the front panel and connect the slider to pin A6 (connector P1, blue wire). Tip: If you also install the [10-turn tuning pot](#10-turn-tuning-pot), then you can re-use the original 1-turn pot for the PBT control.
 Turning this pot will shift the BFO frequency in RX mode, which acts as a Passband Tuning (PBT) control. Although the principle is different, the behaviour is somewhat similar to 'IF-shift' as seen on many commercial rigs.
-Passband Tuning is disabled by default, go to the SETTINGS menu to [enable this function](#passband-tuning).
+Passband Tuning is disabled by default, go to the SETTINGS menu to [enable this function](#Passband-Tuning-(PBT)-ENABLE).
 Note: Do not enable PBT when the PBT pot is not installed, as this will lead to random readings from the Arduino's analog input!
 
 ![imgage of PBT pot wiring](clarifier.png)
@@ -88,7 +88,7 @@ The 5 pin header
 
 The default frequency span of the standard supplied 1-turn tuning pot is only 50 kHz.
 If you install a 10-turn pot instead you can extend the span for full 40m band coverage.
-Tip: Save the original one-turn pot and re-use it for the [Passband Tuning](#clarifier) control.
+Tip: Save the original one-turn pot and re-use it for the [Passband Tuning](#passband-tuning) control.
 
 ![Image of 10-turn pot hookup](Vishay%20100K%2C%2010-turn%20pot%20wire%20up.jpg)