EUROTEL - ITALY
ETL0480TBD
3 ) ETL0470: front panel controls, displays & connectors
The front panel of the ETL0470 TV RF AMPLIFIER MODULE is shown in figure 2.
FRONT PANEL
ITEM
DESCRIPTION
SIGNALS AND
CONNECTIONS
R.F. MONITOR
BNC socket to monitor the RF output.
SWITCHES
I O
This switch controls A.C. power to the unit.
PUSH-BUTTONS
SELECT
Controls the menu levels and is menu driven, as
explained in detail in the “MENU DESCRIPTION”
following.
~
Normally controls the lower row of the display and is
menu driven.
~
Normally controls the upper row of the display and is
menu driven.
PREV.
Controls the menu levels and is menu driven, as
explained in detail in the “MENU DESCRIPTION”
following.
DISPLAYS AND LED’s
MULTIFUNCTION
METERING DISPLAY
Two row, 16-character alphanumeric display. Shows
levels of: RF output power, supply voltage, supply current
and heats-sink temperature. It also shows warning
conditions, alarm conditions and other information.
LINE LED (YELLOW)
Shows presence of mains voltage.
ON AIR LED (GREEN) Indicates that the RF Amplifier is operating normally and
RF output is within limits specified.
ALARM LED (RED)
When lit, this LED indicates that one alarm has occurred.
In this condition the Metering, alarm and Protection
module immediately disables the amplifier.
V.S.W.R. ALARM LED
(RED)
As soon as it turns on, the power supply is disabled. This
indicator shows that the reflected RF power alarm has
been triggered.
WARNING LED
(YELLOW)
Indicates one or more warning conditions in act, if
blinking indicates alarm or warning stored in the
EEPROM non-volatile memory.
October 2002
CMAN0480ENG
Page 17
