User's Manual

Page 6 R
F
Technology
2 CIRCUIT DESCRIPTION
1.4.1 RF Input
The RF drive is delivered via the BNC connector. Input drive level is 2 Watts, the
absolute maximum power that should be applied to this connector is 4 Watts.
1.4.2 RF Output
The RF output signal is available from an N-type connector.
The input/output impedance is 50 ohms.
1
.4.3 25 Pin Connector
The 25-pin “D” connector provides connection to ground and dc power. The pin
co
nnections are given in table 1.
1.
4.4 RJ45 Ethernet Connector
The RJ45 connector is used to monitor and configure a range of parameters remotely
using the Internet Protocol over Ethernet.
Pi
ns Function
1, 2, 3, 4, 14, 15, 16, 17 Positive supply
9, 10, 11, 12, 13, 22, 23, 24, 25 Ground (negative supply)
Table 1: Pin connections for the 25 pin “D” connector on the rear panel
2 Circuit Description
The following descriptions should be read as an aid to understanding the diagrams shown
in figures A.1 and A.2.
2.1 Amplifiers
The RF power amplification is provided by two RF MOSFET modules, U15 and U16.
Module technology is used in this amplifier to guarantee superior reliability, this
technology has been field proven in tens of millions of radios over the past 25 years.
Each module is rated at 60 watts output. The input and output impedances are
internally matched to 50 Ohms. The 50W models have only has module fitted.
E2-IP-PA 500BH