Alcad 905-TO Series, Manual, Page: 38 / 67

10.2 Adjusting the output level of single channel amplifiers
Connect a field measurer to the output connector of the distribution, while
the other output is charged. Tune the channel of each single channel
amplifier and adjust the level regulator of the single channel amplifier until
reaching the desired level.
11. UPDATING THE PROGRAMMER
It is possible to update the transmodulator. Visit Alcad's web for
downloading the transmodulator updating software and instructions:
www.alcad.net
If you do not have a connection to the Internet, feel free to request the
updating software from your local Alcad Dealer or Representative or from
Alcad.
The TO Transmodulator is updated from a PC computer. To connect the TO
Transmodulator to a PC, it is necessary to use a serial communication cable
and the IP-001 programming interface.
WARNING: The communication cable must be connected to one of the
serial ports of the computer (COM1, COM2, COM3 or COM4) or to a
USB port.
12. SOLUTIONS TO POSSIBLE ANOMALIES
A. ANOMALY C. CAUSE S. SOLUTION
A. General problems and some indicators do not turn on.
C. The transmodulator has not been correctly programmed.
S. Check the data used to program the transmodulator in the OSD. Or
perform a reading of the data stored in the transmodulator to ensure
data transmission took place correctly. To do so, press the
F
and
READ
keys on the PS programmer.
A. COFDM INPUT (21) channel hook-up indicator does not turn on.
C. Deficient quality or level of the input signal received.
S. Check the quality of the input signal on OSD or measure the BER (Bit
Error Rate) with a field meter for COFDM digital signals at signal output
(20) of the last transmodulator of the demixing stage. BER as measured
at input must be less than 2E-2. Check that the input signal level is within
the limits specified in the technical datasheet (34).
A. All the indicators are on, but the image is frozen or black.
C. Deficient quality or level of the input signal received.
ENG - 37 Serie 905-TO