Hagstrom KE-USB108 User Manual - Trackball Control
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of this manual.
Note: The rotary encoder switches are limited to a single key
entry and do not allow mouse button, joystick function, or macro
sequence events.
In addition to defining keystrokes, there are three options that can
be set for each rotary encoder switch.
Maximum rate:
This option is used to determine the maximum speed at which
rotary-triggered keystrokes are sent to the computer. This value
can be set by using the dropdown menu to select 10, 20, or 40
keystrokes per second. The default value is 10 per second (see
below). The rate is affected by other system actions, therefore, the
selected rate is a maximum rate and not necessarily an absolute
rate.
Divisor:
This option sets the number of incoming pulses the rotary encoder
switch must provide per outgoing keystroke. Many mechanical
rotary encoder switches provide four pulses between each detent.
Setting this option to 4 will allow for such switches to produce
one keystroke per detent position. Optical rotary encoders will
generally provide one signal for each rotary position of the switch.
In this circumstance, the divisor would be set to 1. The divisor
value is set by using the dropdown menu and selecting the values
1 (default), 2 or 4 provided.
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Buffer overflow:
This option controls the buffering of pulses for the rotary input. In
cases where the rotary encoder switch produces inputs faster than
the keystrokes are sent out, the new input changes will be buffered
or ignored based on this setting. When this option is disabled
(default state), incoming switch pulses will not be buffered. Once
a change on the rotary input is detected, any new changes from
that rotary input are ignored until the unit has output the previous
keystroke to the PC. When the buffer option is enabled, the
incoming pulses will be buffered such that each input change will
result in a corresponding output pulse. Rotary inputs are buffered
up to 64 keystrokes per rotary encoder switch. The buffer overflow
option is selected by using the dropdown menu. Valid selections
are either disabled or enabled.
Trackball Control
The section labeled “Trackball
Control” is used for adjusting
trackball movement. Based on
the type of trackball being used,
one or both of the “Reverse Axis”
check boxes may need to be selected in order to obtain the proper
left-right or up-down movement from your trackball. Should the
trackball move the cursor up when it should go down, check the
Reverse Y Axis box. Should the trackball move left when it should
move right, check the Reverse X Axis box.
Trackball Jumper:
The KE-USB108 provides
a three position header in
the lower left hand corner
of the board (see picture to
the left).
Trackball Jumper
USB Connector