Patton electronics 2002 Series, User Manual

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Then
gently twist the screw driver to pop the case open as shown
in Figure 2. Be careful not to damage the case or connector as you
twist the screw driver.
3.3 CHANGING THE JUMPER STRAPS
Once you have opened the case of the Model 2002, you will see
two jumper straps located the top side of the PC board (See Figure 3,
below.
To change the jumper strap settings, simply remove the jumpers
and replace them on the jumper posts as described in the following
section.
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JP2 JP1
3.1 JUMPER SWITCHES JP1 AND JP2
Use Jumper Switches JP1 and JP2 to control the logic state of the
data and/or control signals. In most cases no modification is
required!!
Consult the user manual of the TTL device or the device’s
manufacturer before changing the settings on JP1 and JP2. This
section describes the jumper settings.
Non-Inverted Data and Control Signals (Default Setting)
Position JP1 and JP2 vertically on the jumper posts to select non-
inverted data and control signals (default setting). Figure 4 shows the
position of the jumpers on the pc board. Table 3 shows the relative
signal levels.
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Figure 2 : Using a Small Screw Driver to Open the Model 2002 Case
Figure 3 : Close-Up of the Model 2002 Series Jumper Straps
Signal Level Data Signals Control Signals
0.0 to 0.4 Volts space active
2.4 - 5.0 Volts mark inactive
Table 3 . Non-Inverted Data and Control
JP1 JP2
Figure 4 : Non-Inverted Data and Control Signal Jumpers
RS-232 Side
(Female)
TTL Side
(Male)
RS-232 Side
TTL Side