Patton electronics 2002 Series User Manual page 7

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.
TTL Side
Figure 4: Non-Inverted Data and Control Signal Jumpers
Table 3. Non-Inverted Data and Control
Signal Level
0.0 to 0.4 Volts
2.4 - 5.0 Volts
JP1 JP2
Data Signals Control Signals
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RS-232 Side
active
inactive