Up beat/Down beat jumper:
In Up-beat counting, each ack fires after "N" number of pulses are counted on the input ack (where N is the divide-by-
number). So, after a Reset pulse, only the /1 ack will fire on the first clock pulse. On the next clock pulse, the /1 and the /2
ack will fire, then on the next pulse the /1 and /3 acks will fire, etc... This is the default method for pcb v1.0 and v1.0.1,
unless it has been upgraded to v1.0.2 code.
In Down-counting, each ack fires when its count is 1. So all the acks will fire after a Reset pulse, and then count up to "N",
and fire again when they start over at 1. This is called" down-beat counting" because all the acks fire on the down-beat (first
clock pulse).
Gate/Trigger Mode jumper:
In Trigger mode, the acks output a pulse width equal to that of the input clock (the pulse width is not multiplied or divided
proportionally to the ack's divide-by amount). This is the default method for pcb v1.0 and v1.0.1, unless it has been upgraded
to v1.0.2 code.
In Gate mode, the width of the output pulses are 50% of the total wave. For example, the /6 ack will stay ON for 3 clock
pulses, and then turn OFF for 3 clock pulses. For even numbered divisions (/2, /4, /6, /8, etc) the transitions happen on the
input clock's rising edge.
Point of interest: In Gate mode, with odd-numbered divisions, the ack will turn ON on a rising edge of the input clock, and
then will turn OFF on a falling edge. For example, the /5 ack ought to stay on for 2.5 clock pulses, meaning it should go OFF
somewhere between the rising edge of clock pulses 2 and 3. Right in between these is the falling edge of pulse number 2, so
we can safely call it 2.5!
When in Gate mode (jumper 8), the difference between Up counting and down counting is simply that the gates are
inverted.
Auto Reset jumpers:
Jumpers 5 and 6 select the Auto-reset point, which causes the divide counters to reset after a certain number of clock pulses.
Note that divide-by amounts which are evenly divisable by the reset amount are not affected: e.g. with an auto-reset of 16,
divide-by outputs of 2, 4, 8, 16, etc are not changed.
Also, note that the CV Reset is independant of the Auto-reset. For example, Jack 7+R could be patched into the CV Reset
with umpers 3, 4, and 5 in. This would cause a reset every 7 clocks, plus an additional reset every 16 clocks.
There are too many combinations of Auto-reset and Max divide amounts to show all combinations!
Example: Auto-reset of 16 (Jumper 5 in, no Jumper 6), with Max Divide-by of 8 (Jumpers 3&4)
IN: 12345678910 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
3X X X X X X X X X X
5X X X X X X
7X X X X
