Kurzweil HUB7, Manual, Page: 49 / 56

RSP8 Diagnostics and Troubleshooting
Appendix A-7
Buttons – When any button is pressed, its name will be shown
after “BUTTON:” and its row/column address shown after
“ADDRESS:”. The latter can be helpful when troubleshooting
short circuits in the button wiring. Response to changes in button
status is also very fast allowing easy detection of intermittent
button contacts.
LEDS – When a button with an associated LED is pressed, the
LED will light as long as the button is held down. The leftmost
soft button is associated with the LEDs on the left side of the
display panel. Each press lights the next LED in sequence. For the
tri-color meter LEDs, each will sequence through its 3 colors -
Red, Orange, and Green. Soft button #2 works similarly for the
right side of the display panel. If you wish to hold one or more
LEDs on without having to hold the associated buttons, just press
and hold any button then press momentarily any button whose
associated LED you wish to turn on. Only when all buttons are
released will the LEDs extinguish.
Main Encoder – Rotating this will update the “Alpha” display.
The spinner shows the electrical state of the encoder's contacts
while the numerical display below shows its cumulative position.
This value is also sent to the LCD backlight brightness control.
CAUTION: Do not set this above 160 except for short periods.
Settings above 160 will cause the RSP8 to exceed the power rating
of the KSP8 or HUB7 powering it. Use such settings only for
testing voltage drop in cables as described below.
Control Knobs – Turning any of these will update the second
spinner display in a manner similar to the main encoder. There is
also a number from 1 to 8 just to the left which identi
fi es the
encoder being turned. Additionally, the joystick display at the
right end of the display will show an oscilloscope-like trace of the
encoder's movement. Each “click” of an encoder should draw
one more dot on the display along an upward slant for clockwise
or downward slant for counter-clockwise rotation. Spurious or
unstable operation of the encoder is thus easily seen. Pressing the
rightmost soft button will clear the joystick display area.
Joystick – Moving the joystick will update the X and Y position
display. Values shown are raw readings and do not use the
joystick calibration data. Typically x should span a range of -118
to +118 give or take 8 counts on each end and Y should span a