Tektronix ECO422D, Инструкция по эксплуатации

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Operating Basics
ECO422D SD/HD Changeover Unit Instruction Manual
2- 7
Toggle Sync Source (active low) Operates the same as the Sync Source button on
the front panel. A low pulse will cause the ECO422D to toggle between Primary
and Backup as the output signal.
Indicate Primary Sync Source Active (active high) Indicates that the Primary
signals are the sync source.
Indicate Backup Sync Source Active (active high) Indicates that the Backup
signals are the sync source.
Fault Alarm (active high) Indicates that at least one of the Primary or Backup
input signals is “bad.” This alarm signal is latched and will remain high until the
error is cleared and the Reset button is pressed.
Fault Reset (active low) This operates like the front-panel Reset button. It clears
the fault indicators (turns off the LEDs) after the fault has been corrected.
Fault Reporting -- and + It is normally open, indicating that everything is good. It
will close in the cases of: loss of power to the ECO422D or one (or more) input
signals are bad. The fault is latched and will remain until the fault is cleared.
This fault reporting system follows SMPTE 269M guidelines except the
interface is 2 pins of the Remote connector (7 & 8) instead of the standard
isolated BNC connector and there is no pulsing. When in the open state, the
leakage across the closure is less than 100
µ
A at any voltage from 0 to 5 VDC.
The closure is able to withstand 24 VDC in the open state without damage. In
the closed state, the maximum voltage drop across the closure should not exceed
2 V at 20 mA. The sensing device should not supply more than 20 mA of current
to the reporting device. To provide compliance with the standard, wire a BNC
connector adapter as shown in Figure 2--5.
5 4 3 2 1
6 9
8
In--line BNC jack
7
Figure 2- 5: Wiring required to conform with SMPTE fault reporting