Adjusting Levels With Single Channel Amplifiers; Solutions To Possible Anomalies - Alcad 912-MS Serie Manual De Instalación Y Programación

WARNING, the reduction of the maximum output level must be taken
into account depending on the number of channels amplified (including
the EXT input channels). The maximum level of work is calculated by
subtracting the reduction factor from the maximum output level (sheet of
characteristics). The table of level reductions is included in the ANNEX.
8.3 Adjusting the level to the channels from other units
With the field measurer connected to TEST, tune the measurer to each of
the channels from single channel units and adjust the level from the
adjuster of those channels. The level recommended is from 3 to 6 dB
higher than the satellite channels from MS modulators.
9. ADJUSTING LEVELS WITH SINGLE CHANNEL
AMPLIFIERS
Once the unit is installed and every receiver programmed, tune the unit.
9.1 Adjusting the output level of the modulators
Make sure that the output level adjuster of each modulator is at -0 dB.
9.2 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.

10. SOLUTIONS TO POSSIBLE ANOMALIES

A. ANOMALY
A. Horizontal white and black stripes are displayed.
C. The output channel is engaged by another channel
S. Select one free output channel (OUTPUT function).
A. The screen is black or with snow.
C. No video signal reaches the modulator.
S. Make sure that the video source is properly connected.
A. Image is seen but is not heard.
C. No signal reaches the audio of the modulator.
S. Verify that the audio source is properly connected.
A. The sound level is weak
C. Selecting the Audio Stereo when the input is Mono
S. Selecting the Audio Mono input or introducing stereo sound in the
input.
Serie 912 - MS
C. CAUSE S. SOLUTION
ENG - 27