Filter selections are made from locations 100 up. P3 supplies 3 bits and ground allowing selection of up to 8 bands.

• Memory location 1xx selects "000" on the 3 output pins
• Memory location 2xx selects "001" on the 3 output pins
• Memory location 3xx selects "010" on the 3 output pins
• Memory location 4xx selects "011" on the 3 output pins
• ..........................5xx............100
• ..........................6xx............101
• ..........................7xx............110
• Memory location 8xx selects "111" on the 3 output pins

This is how Sid Boyce set his up for band switching. Pins 1 and 2 will switch the 4 RX BPF's. Additional band segments can be inserted, e.g you could set up more 4xx locations to easily move to other parts of the 10m band, avoiding the need of always having to tune up from 28.0 Mhz.

Memory location.......Band....value..............P3 pins 1,2,3

• 100................160m....1810000.........000
• 200..................80m....3500000.........100 (same BPF used for 40m/80m)
• 201..................40m....7000000.........100 (same BPF used for 40m/80m)
• 300..................30m...10000000.........010 (same BPF used for 17m/20m/30m)
• 301..................20m...14197000.........010 (same BPF used for 17m/20m/30m)
• 302..................17m...18068000.........010 (same BPF used for 17m/20m/30m)
• 400..................15m...21000000.........110 (same BPF used for 10m/12m/15m)
• 401..................12m...24890000.........110 (same BPF used for 10m/12m/15m)
• 402..................10m...28000000.........110 (same BPF used for 10m/12m/15m)

P3 output levels 0=0V 1=3.3V

I have set memory loc. 002 (startup frequency) to 301 so the unit powers up with

• Initialize by pushing and holding in the rotary encoder shaft (switch is part of the rotary encoder) while powering on. It cycles through �code date�, �micro initialization�, �EEPROM reset�, and eventually comes up displaying memory location �20� (default set to 10Mhz).
• The cursor dot appears to the right of the location, �20.� 10000000 Release the push button, rotate the tuning knob to location �0�. THIS IS IMPORTANT �.location �0� will display the default Si570 frequency for YOUR Si570. The Si570s obtained from Tony Parks, Tom Hoflich, or myself are all 56.320000Mhz. You might have ordered a 10Mhz part or a xyzMhz part. Adjustment is done by pushing on the knob while rotating it, you will see the cursor dot advance across the display, indicating which digit will roll with the rotary encoder when you stop pushing. Rotate the knob and move the cursor until the default frequency is correct. Push in the knob for 3 seconds, the memory changes to location �8� (next free location) - location �0� value of �Si570 default frequency� is now saved.
• A feature of the Si570 Controller is �Dial Lock� mode. If you momentarily (~1/2sec) push the knob (which you may accidentally do) the cursor dot will flash indicating �Dial Lock�. Pushing it again will unlock the dial.
• Location �1� (Frequency Offset) needs to be set to �0� for SR. This is done by pushing on the knob while rotating it, you will see the dot advance across the display, when it is to the right most position, release the switch and rotate the knob until it reads �0�. Push in the knob for 3 seconds, the memory changes to location �8� (next free location) - location �1� value of �0� is now saved.
• Rotate the knob to select other memory locations. Location �2� sets the power-on startup memory location. Location �3� sets the power-on startup digit position. Location �4� (default set to 1) is the Frequency Out Multiplier and needs to be set to 4 for SoftRock. Location �5� is the Frequency Out Divider and needs to be set to 1 for SoftRock (unless you are doing sub harmonic sampling). Location �6� controls pulses per digit or Dial Speed. Location �7� sets Dial Rotation Direction.
• Locations 20-999 are used to save your favorite frequencies. If say location 21 is set to 3.77MHz, you can tune anywhere in the 80m band for normal operation, but when you power off/on again, the saved 3.77Mhz will appear in location 21. In fact, you can tune all the way up and down across the HF spectrum from one memory location. The incremental change in frequency depends on where on the frequency readout you place the dot, e.g if you have 377.000000, the next step up will be to 378.00000 etc. The Controller frequency can be tuned away from it's set frequency, allowing tuning up and down the band. The standard programs PowerSDR-IQ, Rocky, Winrad, etc. work, but the USB setting has to be changed as you no longer have program control of the Si570. Sid used the Demo setting with PowerSDR-IQ. The 9V1AL Automatic Switched BPF board does the bandswitching. It's a little bit more involved than a normal commercial transceiver, but easy when you get the hang of using it. Sid has fitted a DPDT switch to the SDA/SCL lines so I can now switch between the Si570 Controller and the UBW.