Technical Manual

Preliminary Release

2.2.2 Power Connector

The DC power input connector to the 2788 radio is a rectangular two-pin locking connector.

The radio unit is normally powered upon connection to a DC power source of +11 to +24 Vdc,

+13.8 Vdc (nominal). The red conductor is positive; the black conductor is negative and is

internally grounded to the chassis.

2.2.3 Initial Checkout

Alligator wireless data transport products are factory-configured according to customer

configuration information received prior to shipment from the factory; thereby, customer field

configuration requirements are minimized.

To verify that 2788 radio parameters are correct, we recommend the following minimal tests be

conducted with regards to the transmitter and receiver settings of the 2788 radio:

1. Connect a 50 Ohm dummy load to the antenna Type N connector. The dummy load

must have a power rating of at least 5 Watts. Always insure that a load or antenna is

connected to the Type N connector before DC power is applied.

2. Connect a spectrum analyzer to the dummy load through a power attenuator (30 dB

recommended).

3. Connect a computer to the 2788 using a CAT5 Ethernet cable between Ethernet

connectors. Alternatively, you may use two CAT5 cables, each connected to a

multiport Ethernet router switch. Do not use an Ethernet hub because they may be

a source of errors.

4. Connect a 12Vdc power source to the power input, +12V on red, GND on black.

Observe all LEDs activate at power-up to verify LED functionality. The PWR LED

should remain on.

5. Configure your computer for an IP address in the 192.168.1.X space (but do not use

192.168.1.1 or 192.168.1.128). This can be changed later, but is necessary for initial

Telnet communication with the 2788. For example, use 192.168.1.2 .