3
TV SOUND MODULATOR
CW-3130
SPECIAL INFORMATION
The circuitry of the CW-3130 TV SOUND
MODULATOR is controlled by I
2
C bus. In order to
avoid troubles due to possible power cuts or other dis-
turbances, the required data are fed to the integrated
circuits in regular intervalls. The refreshing frequency
can also be programmed according to the followings:
- push buttons ERROR and CLEAR simulta-
neously, to enter the second menu system. This mode is
signalized with underscored characters in the display.
- Choose item "rt" (REFRESH TIME).
- The refreshment time is 2.5 s at value 8. On
decreasing this value by one, the refreshment time be-
comes double. With value 1, it is more than 5 minutes.
- Push buttons ERROR and CLEAR simulta-
neously, to leave the second menu system.
The units of the CW-3000 series are suitable
of being remote controlled by personal computer. In
this case, each of the units must have an individual
address. This address can be set in the second menu at
menu item "Ad" (ADDRESS), between 1 and 99. The
address permits also the identification of the individual
unit.
The PROGRAMMER can also be used for
quick location of possible faults of the unit. Push
ERROR to display the error code, then locate the fault
using the manual of the PROGRAMMER.
Attention: the circuitry of the unit is protected against
copying. Therefore, modifications in the internal con-
trol may cause the normal operation being inhibited.
Dear User!
The necessary skill in programming this unit can only
be achieved through trying the particular functions in
practice. We hope this guide will be helpful to you in
this effort.
Should you face any problems at using the unit, our
experts are at your disposal any time.
Table 1
Locations of the potentiometers for adjusting the carrier levels
