Ericsson RX1290, Справочное руководство

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Introduction
1.6 Guided Tour
1.6.1 Construction
The Multi-Format Receiver is constructed using a screened self-ventilated modular
system. All operational inputs and outputs are via rear-panel connectors. The unit
may be operated freestanding or mounted in a 19-inch rack.
1.6.2 Front Panel Controls
The physical interface for the Front Panel consists of an alphanumeric LCD display,
pushbuttons, and status LEDs that are used to set-up and monitor the unit. The
general layout is shown in
Figure 1.7. Information on the use of these controls is
given in Chapter 3, Operating the Equipment Locally.
User input is via six pushbuttons comprising four cursor pushbuttons: Left , Right ,
Up , and Down ; and two edit control pushbuttons: Edit and Save .
Each pushbutton has an integral green LED except Save , which has an integral red
LED. When lit these LEDs indicate to the user which pushbutton is currently active.
Automatic repeat following an initial delay period is implemented for the Left , Right ,
Up , and Down pushbuttons in software.
Figure 1.7 Front Panel Controls
LCD display
Save
Edit Up
Down
Left
Right
POWER LED
ALARM LED
1.6.3 Front Panel LEDs
Figure 1.7 shows the location of the LEDs on the front panel The LEDs indicate the
Multi-Format Receiver status as follows:
The red ALARM LED is used to indicate a Multi-Format Receiver fault condition,
e.g. a missing or faulty input signal. It should be off for correct operation, although it
may be lit briefly during power up.
The green POWER LED is used to indicate that the Multi-Format Receiver is locked
to a Transport Stream when lit, indicates correct conditions and correct system
functioning.
EN/LZT 790 0003/2 R1A 1-12