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Chapter 2 Radio Power

This chapter provides a detailed circuit description of the power distribution of an ASTRO XTS 5000

radio.

2.1 General

In the ASTRO XTS 5000 radio, power (B+) is distributed to two boards: the transceiver (RF) board

and the VOCON board (see Figure 2-1 on page 2-2 for UHF Range 1 (R1) and 700–800 MHz, and

Figure 2-2 on page 2-2 for VHF). For kit NNTN5567, the VOCON board supplies VSW1, regulated

3.6Vdc, from the MAKO switching regulator to the XCVR. In the case of a secure model radio, B+ is

also supplied to the encryption module.

Power for the radio is provided through a battery supplying a nominal 7.5 Vdc directly to the

transceiver. The following battery types and capacities are available:

Table 2-1. Conventional Batteries

Part Number Description

NTN8294 1525 NiCd, Ultra-High Capacity

NTN8295 1525 NiCd High-Capacity Factory Mutual (FM) Intrinsically Safe

NTN8297 1525 NiCd High-Capacity Factory Mutual (FM) Intrinsically Safe,

Rugged

NTN8299 1750 NiMH Ultra-Capacity FM

NTN8610 1650 Lithium Ion

NTN8923 1800 NiMH Ultra-Capacity

NTN9177 Battery Holder, Clamshell, Black

NTN9183 Battery Holder, Clamshell, Orange

RNN4006 3000 NiMH

RNN4007 3000 NiMH FM

Table 2-2. Smart Batteries

Part Number Description

HNN9031 1525 NiCd Smart

HNN9032 1525 NiCd Smart FM

NNTN4435_R 1800 mAh, NiMH Smart

NNTN4436 1750 NiMH Smart FM (VHF use only)

Motorola ASTRO XTS 5000 Detailed Service Manual

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