Tektronix TLA715 Series, Service Manual

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Specifications
1- 6
TLA715 Dual Monitor Portable Mainframe Service Manual
Table 1- 3: Backplane interface (Cont.)
Characteristic Description
External signal input TTL-compatible via rear panel BNC connector
Input destinations Signal 1, 2 (ECLTRG0, 1)
Signal 3, 4 (TTLTRG0, 1)
Input levels V
IH
≥
2.0 V
V
IL
≤
0.8 V
Input mode Level sensitive, active (true) low
Input bandwidth
4
Signal 1, 2 (ECLTRG0, 1)
Signal 3, 4 (TTLTRG0, 1)
50 MHz squarewave minimum
10 MHz squarewave minimum
Active period Accepts signals during valid acquisition periods via real-time gating
Maximum input voltage 0 to 5 V peak
System trigger output TTL-compatible via rear panel BNC connector
Source selection System Trigger (TTLTRG7)
Output levels 50
Ω
back terminated TTL output
V
OH
≥
4.0 V into open circuit
≥
2.0 V into 50
Ω
to ground
V
OL
≤
0.7 V sinking 10 mA
Source mode Falling edge latched, active (true) low
Active period Outputs system trigger state during valid acquisition period; resets system trigger output to false
state between valid acquisitions via software
Output protection Short-circuit protected to ground
External signal output TTL-compatible via rear panel BNC connector
Source selection Signal 1, 2 (ECLTRG0, 1)
Signal 3, 4 (TTLTRG0, 1)
Output levels 50
Ω
back terminated TTL output
V
OH
≥
4.0 V into open circuit
≥
2.0 V into 50
Ω
to ground
V
OL
≤
0.7 V sinking 10 mA
Output mode User definable; level sensitive active (true) low or active (true) high
Output bandwidth
5
Signal 1, 2 (ECLTRG0, 1)
Signal 3, 4 (TTLTRG0, 1)
50 MHz squarewave minimum
10 MHz squarewave minimum