Tektronix ECO422D, Инструкция по эксплуатации, Страница: 30 / 128

Getting Started
1- 10
ECO422D SD/HD Changeover Unit Instruction Manual
1. No checking.
2. Set a user-defined level — best for a constant test signal.
3. Use the predefined black setting — best for video with a wide variation of
average picture levels or regular fades to blacks.
Configuration
NOTE
. Make sure that any channel not in use has checking disabled. If checking
is not disabled, errors will always be generated. No error checking also allows
the maximum voltage, current, and frequency to pass through the ECO422D.
Photocopy the list of the DIP switches, shown in Table 1--2, to log the configura-
tion of your system and use it as a quick reference. If using one of the “user-de-
fined” levels, write the definition on the line as a reminder.
All of these switches are available through a small access panel on top of the
ECO422D, eliminating any need to remove the top cover just to change the
function of the outputs. The gray shading on the switches in Figure 1--9 indicate
the down position of the rocker switch.
There is also a Mode switch, switch S14-8. Set it for either Normal or Override
operation. If set for Normal operation, it will not allow you to manually switch
to a bad signal, unless both signals are “bad.” For example: you are set for
manual operation and the Primary signal is in error while the Backup is good.
Press the Sync Source button to change to the Backup source. No matter how
many times you press the Sync Source button again, the ECO422D will not
allow you to return to the Primary source because it is in error. The only time
that you can switch to an “error” signal in Normal mode is when both of the
signals are bad. In that case, you can manually switch between the two signals.
In Override mode, you can always manually switch to a bad signal. The other
positions of S14 are only used for testing purposes, and must be closed for
normal operation.
Power Up Delay.
If desired, hex switch S13
3
may be used to adjust the power up
delay. Each setting of S13 increases the delay in increments of approximately 30
seconds, from position 0 (no delay) to position F (over seven minutes). The
factory setting is position 5, which provides a delay of slightly under three
minutes.
3
Serial number B030000 and later.