Figure 4-7. Frequency Generation Unit Dc Power Supply Distribution (Uhf Range 2) - Motorola ASTRO XTL 1500 Detailed Service Manual

Digtal, vhf/uhf range 1/uhf range 2/700–800 mhz

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Table of Contents

Troubleshooting Procedures: UHF Range 2 (450–520 MHz) Band Main Board Troubleshooting

FGU Troubleshooting Aids

The following illustrations are additional service aids for troubleshooting the frequency generation

Figure 4-8 on page 4-20

Table 4-12 on page 4-20

Figure 4-9 on page 4-22

from Battery or

Power Supply

9.3V Regulator

5.0V Regulator

3.0V Regulator

MHz Reference

Oscillator and

U6752 Buffer

Figure 4-7. Frequency Generation Unit DC Power Supply Distribution (UHF Range 2)

6815854H01-A

is a block diagram of the DC distribution for the frequency generation unit.

is a block diagram of the frequency generation unit.

describes the function of pins on the LV Frac-N IC U5752.

is a waveform representation during programming of the LV Frac-N IC

8.2V Superfilter

Q5825, Q5826 TX VCOs

Q5901, Q5903, Q5905

Q5902, Q5904, Q5906

Stages of RX

9.3V Regulator

Bias Q5750 and

Q5751 , Prescaler

June 15, 2005