Specifications

24 MDS 4790/9790 Series I/O Guide MDS 05-3438A01, Rev. E
4.7 Post Installation Checks
Before applying power to the radio, verify that:
1. All connections are properly wired and secure
2. Input voltage matches that of the installed power supply
3. Antenna heading is preset in the direction of the associated station
This completes the installation of the radio. Section 5.0, START-UP
AND OPERATION, describes the unit’s indicators and gives initial
startup procedures.
5.0 START-UP AND OPERATION
The radio is designed for continuous, unattended operation. Under
normal conditions, the only time operator intervention is required is to
power the unit up or down, or to change an operating parameter. This
section explains the use of the radio’s indicators and provides steps for
initial startup of the equipment.
5.1 Initial Startup
NOTE: The radio is normally continuously keyed, and transmits when
the power is switched on. Ensure there is a suitable load on the
antenna connector before switching the power on.
Operation of the radio can be started by simply connecting primary
power to the unit and setting the rear panel
POWER switch to ON.
Normal Indications
When power is first applied, the following events occur in a normally
working unit:
• All front panel indicators light briefly and a beep is emitted
• The front panel display shows the start-up screen, similar to
Figure 25
• The
ACTIVE LED for the selected transceiver board lights. (In a
master station configured for redundant operation, the
STBY
LED also lights for the stand-by unit.)
Maximizing RSSI
Since the master station almost always uses an omni-directional
antenna, maximizing signal strength is done at the remote sites where
directional antennas are typically used. An RSSI stronger than -90 dBm
is desirable.