AMERITEC AM-48 - Circuit Diagrams; AM-48 Simplified Block Diagram

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AM-48 Test Set (18-0015) Circuit Diagrams

0015-S09

-1

9. CIRCUIT DIAGRAMS

9.1 Introduction

This section covers a block diagram of the AM-48 and a schematic

diagram of the Impedance Adapter.

9.2 AM-48 Simplified Block Diagram

Figure 9-1 is a simplified block diagram of the AM-48. Note that

continuous lines connecting the blocks indicate signal paths, while

broken lines indicate control paths. The

definitions of the

abbreviations in the block diagram are listed below.

AMP AMPlifier AV Average detector

AUTO AUTOmatic BP 1 KHz Band Pass filter

CMSG C-message noise-weighting filter

DET DETector FILT FILTer

FWR Full Wave Rectifier HOLD HOLDing circuit

4 HZ 4 Hz high pass filter 20 HZ 20 Hz high pass filter

300 HZ 300 Hz low pass filter IMPLS IMPuLSe

MIC MICrophone MUX MultipleXor

NTCH 1010 Hz NoTCH filter

PAR Peak-to-Average Ratio filter (1300 Hz bandpass)

PK PeaK detector P/P Peak-to-Peak detector

PROG PROGram noise-weighting filter

QUIET QUIET termination R Ring

RCV ReCeiVe

RMS RMS (Root Mean Square) detector (for noise)

SKR SpeaKeR SND SeND

SW Switch T Tip

V/F Voltage-to-Frequency converter

2W 2-Wire 4W $-Wire