AMERITEC AM-48 - AM-48 Impedance Adapter

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Unit Description (18-0015) AM-48 Test Set

0015-S033-24

3.10 Impedance Adapter

The Impedance Adapter (24-0005) is illustrated in Figure 3-10. It is

used to match the AM-48 to:

1. Line impedance

other than 600 Ohms or 900 Ohms

2. 4-Wire

split impedances

The Impedance Adapter has settings for five (5) different impedances

to match the AM-48 to the user interface. It plugs into the RJ11

modular connector of the AM-48. See ¶6.5 for installation, and ¶7.41

for measurement corrections when the Impedance Adapter is used.

The schematic of the Impedance Adapter is shown in Figure 9-2.

THRU

1200 Ω

900 Ω

150 Ω

135 Ω

75 Ω

4W/2W

SEND

UPPER

KNOB

RJ11 PLUG

RJ11 JACK

Ameritec

IMPEDANCE ADAPTER

MODEL 240005

CORPORATION

COVINA, CA. U S A

SET AM4 SERIES TEST SET FOR 600 Ω