CHEETAH Hardware User’s Manual
Imperx, Inc.
Rev. 6.2
6421 Congress Ave.
7/7/2015
Boca Raton, FL 33487
+1 (561) 989-0006
65 of 152
can be selected. All possible mapping options for the camera inputs and outputs are
shown in Table 2.8a and Table 2.8b respectively.
Input Signals
IN1
IN2 CC1 CC2
Trigger
Table 2.8a
CHEETAH Input Mapping
Output Signals
OUT1
OUT2
Trigger
Pulse Generator
Strobe One
Strobe Two
Table 2.8b
CHEETAH Output Mapping
2.14.2 Electrical Connectivity
The Cheetah has two external inputs: IN 1 and IN 2. Input “IN 1” is optically
isolated, while Input “IN 2” accepts Low Voltage TTL (LVTTL). Cheetah provides
two general purpose outputs. Output “OUT 1” is a 5v TTL (5.0 Volts) compatible
signal and Output “OUT 2” is opto-isolated. Figure 2.15a and b shows the external
input electrical connections. Figure 2.15c and d shows the external output electrical
connections
A.
Input IN 1- Opto-Isolated
The input signal “IN 1” and “IN 1 Rtn” are optically isolated and the voltage
difference between the two must be positive between 3.3 and 5.0 volts. To limit the
input current, a 160 Ohm internal resistor is used, but the total maximum current
MUST NOT
exceed 5 mA.
