User's Manual

2 68P80801E35-A 9/1/2001

Power Amplifier (PA) EBTS System Manual - Vol 2

Power Amplifer Overview

NOTE

The power outputs discussed on this section for the

800 MHz QUAD and 900 MHz QUAD Power

Ampliﬁers are referenced to the single carrier mode,

operating at 52 W average power output from the

Power Ampliﬁer’s output connector.

The Power Ampliﬁer (PA), with the Exciter, provides the transmitter functions for

the Base Radio. The PA accepts the low-level modulated RF signal from the

Exciter. The PA then ampliﬁes the signal for transmission and distributes the

signal through the RF output connector.

The 800 MHz Base Radio can be equipped with either 40 Watt PA, TLF2020

(version CLF1771) or 70 Watt PA, TLN3335 (version CLF1772). The 40W PA

module consists of ﬁve hybrid modules, four pc boards, and a module heatsink/

housing assembly. The 70W PA module consists of eight hybrid modules, four pc

boards, and a module heatsink/housing assembly.

The 900 MHz Base Radio is equipped with 60 Watt PA, CLN1355 (kit no.

CLF1300A). The PA module consists of four hybrid modules, two pc boards, and

a module heatsink/housing assembly.

The 1500 MHz Base Radio is equipped with 40 Watt PA, TLN3426 (version

TTG1000). The PA module consists of four hybrid modules, two pc boards, and

the module heatsink/housing assembly.

The PA connects to the chassis backplane through a 96-pin DIN connector and

three blindmate RF connectors. Two Torx screws located on the front of the PA

hold it in the chassis.

Speciﬁcations of the transmitter circuitry, including the Exciter and PAs, are

provided in Base Radio Overview section. Figure 1 shows the 70W, 800 MHz PA.

Figure 2 shows the 60W, 900 MHz PA. Figure 3 shows the 40W, 1500 MHz PA.

Figure 4 shows the 800 MHz QUAD PA (the 900 MHz QUAD PA is similar in

appearance)