Johansson 6505UK Use Manual page 10

Each UHF input has a 20 dB switchable amplifier. This is used as aditional 20 dB attenuator for high levels up to 95 dBµV.
10 dB on VHF input for signals up to 85 dBµV.
Input Amplifier
To switch off the input amplifier.
- Select the input to be attenuated.
- Turn the button to select the Filter & Input Selection mode.
- Push the rotary button to enter the selected mode.
- Turn the button to select the input.
Turn continuously the button through every cluster
to have access to the input selection.
- Push the button to confirm.
- Turn the button to select the Level mode.
- Push the rotary button to enter the selected mode.
- Turn the button to switch off the input amplifier.
- Push the button to confirm.
LED is green
Filter & Input selection
LED is red
Filter & Input selection
UHF 1
VHF 1 2 3 4 5 6
VHF UHF 2
All LEDs of selected input are activated
LED is green
Filter & Input selection
Level
La LED est VERTE
Level
La LED est à présent ROUGE
In 'OFF' position the input signal is
20 dB attenuated in UHF and
10 dB in VHF.
Level
La LED est VERTE
7 8 9
10