Video Switcher Interface
14. If you have a mixer connected, you should now tap on the microphones, or manipulate the Direct/Auto switches,
to observe the behavior of the VI24. You should notice that input 1 lights up output 1, input 2 lights up output 2,
and either of inputs 3 or 4 lights up output 3. Output 4 is active whenever inputs 1 thru 4 are dead. It’s just as
you programmed it!
15. Congratulations! You have successfully set up your VI24. Setting it up for a more sophisticated scenario is really
not very different, so you can now consider yourself an experienced VI24 user.
TROUBLESHOOTING
The following are just general guidelines and initial suggestions. If a problem persists, please refer to the section,
SERVICE AND REPAIR.
PROBLEM POSSIBLE SOLUTION
No activity from led when power is applied. Ensure that the power supply is working. Ensure that power is
getting to the CH-40 (e.g. check for switched or defective outlets). If
another CH-40 power supply is available, try it.
VI24 software can’t find the VI24. Be sure the VI24 is powered on, the test/run switch is set to “run”,
and the PC Port jack is connected to an available COM port on the
PC. Some devices such as internal modems take over the use of a
COM port while the connector on the back of the PC still appears
available. If a gender changer, adapter or cable extension was
used, ensure that all pins are connected normally and not in a “null
modem” configuration.
Non-VI24 LecNet software can’t see
attached LecNet devices. In order to do its job, the VI24 has to keep the PC Port disconnected
from the LecNet during normal operation. Special commands can
be sent to the VI24 to get it to stop monitoring mixers and link the
LecNet to the PC, as well as to break the link and resume normal
operation. Both LecNet Master Pro and the VI24 software are
aware of this behavior. However, if you use software associated
with other LecNet devices directly, without going through LecNet
Master Pro, problems can arise. To check for this, start the VI24
software (the VI24 should appear “connected”) and minimize the
window. This will cause the VI24 to link the PC port to the LecNet,
and then close the serial port so your other LecNet software can
operate.
VI24 or VI24 software cannot see all mixers. Check the order in which the expansion ports are connected, as
well as the settings of the master/slave switches on all the mixers.
See the diagram in the INSTALLING THE HARDWARE section for
details on the proper configuration. Also use the LecNet software to
ensure that each connected LecNet device has a unique address.
ACCESSORIES
Part Number Description
CH40 Power supply
21551 LecNet expansion cable for connection to mixers
LNETWIN LecNet software on disk
21529 Serial cable to connect the LI24 to a PC
Rio Rancho, NM – USA
11
(16 pages)
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