GTCO 2500 Series - Users Guide 2/3 - Manual (Page 18)

2500 Series 18
COMPREHENSIVE TESTS
MODEL ID
SOFTWARE ID
ANALOG TO DIGITAL TEST
INPUT TEST
GRID TEST
CHECKSUM OUTPUT
TRANSDUCER DATA The tablet model number (25120 or 25180) is output in
consecutive ASCII characters on the numbered LEDs. To
view the characters, press a cursor button or the stylus tip
for each character. After the last character is displayed,
the tablet returns to BANK/SELECT.
The software part number and current revision level are
output in ASCII characters as in the MODEL ID test.
Place the transducer on the active area during this test.
The differential voltage between the Y-axis wires located
by the transducer is output continuously on the LEDs as a
binary number between 00 and FF (0 volts to 10 volts).
When a character is received, the tablet beeps and the
numbered indicator LEDs form a binary ASCII display of
the character. They hold the display until a new character
is received. Exit the test by pressing a cursor button or the
stylus.
The grid wires are tested as the transducer moves across
the tablet. This test requires the user to move the
transducer from left to right along the X-axis and then
from top to bottom along the Y-axis. The number of the
wire being tested is output as a binary number (Y is biased
by 80H) on the indicator LEDs. If the test encounters a
bad wire, it stops counting. The last number output is the
number of the bad wire. If the tablet passes the test, it
beeps and returns to normal.
The checksum output should be zero.
The output is an eight-bit binary number followed by a CR
and LF.
b0
b1-b4 Pen/Button Down
Button Code, a four-bit indication of which