Step 1 - LO-End :-

1. Set [FREQUENCY], [WAVE SHAPE] and [CV A] to their minimum (CCW) position
2. Set [CV B] to ‘0’
3. Monitor [SAW-DC]
4. Adjust P101 for an output of 16Hz

Step 2 - Wave Shaper :-

1. Set P201 to its mid-position
2. Monitor [SHAPED DC]
3. Adjust P201 for best sine shape which should be similar to that in Figure B. Note that the wave shaping circuitry can take a couple of seconds to stabilise so make small adjustments and wait for the waveform to stabilise
4. Turn [WAVE SHAPE] to maximum and check that the waveform is similar to that in Figure C
5. Repeat steps (3) and (4) until both ends of [WAVE SHAPE] are a best match for those in Figures B & C
   

Figure B

Figure C

Step 3 - HF Trim:-

Stage 1:

1. Set the '5K Lin' pot fully anti-clockwise
2. Monitor [SAW DC]
3. Set [CV-B] pot to '0'
4. Set [CV-A] to minimum
5. Patch REFERENCE to [CV A]
6. Set REFERENCE to 0.0V
7. Adjust [FREQUENCY] for 300Hz using [CV-B] pot for fine tuning
8. Set REFERENCE to 2.0V
9. Adjust ‘5K Lin’ pot for 75Hz
10. Repeat steps (4) to (5) for best accuracy

Stage 2:

1. Set REFERENCE to 2.0V
2. Adjust [FREQUENCY] for 300Hz using [CV-B] pot for fine tuning
3. Set REFERENCE to 0.0V
4. Adjust P102 for 1200Hz
5. Repeat steps (1) to (5) for best accuracy

Calibration of the HF Trim is a series of successive approximations so stages 1 and 2 should be repeated several times for optimum accuracy.