8

SCD4462D Rev E 10/9/07

Aeroflex Plainview

RX DATA IN

TX DATA OUT

RX DATA IN

R

R

Zo

Zo

Data

Bus

Wire

B

B'

A

A'

1 : N

Isolation

Transformer

Terminal

1 : 1.414

Coupling

Transformer

Isolation

Resistors

Pair

TX DATA OUT

Terminal Input Impedance B – B'

MIL-STD-1553B para 4.5.2.1.2.3

1K

TRANSCEIVER

UNDER TEST

FIGURE 11 – MACAIR/1553 DATABUS INTERFACE USING TRANSFORMER COUPLING

RX DATA IN

TX DATA OUT

RX DATA IN

55

Ω

55

Ω

Zo

Zo

Data

Bus

Wire

B

B'

A

A'

1 : N

Isolation

Transformer

Pair

TX DATA OUT

Terminal Input Impedance B – B'

MIL-STD-1553B para 4.5.2.2.2.3

2K

TRANSCEIVER

UNDER TEST

FIGURE 12 – MACAIR/1553 DATABUS INTERFACE USING DIRECT COUPLING

Terminal

RX DATA OUT

RX DATA OUT

RX DATA OUT

RX DATA OUT

Transformer turns ratio:

N = 1

Recommend Technitrol 1553-1

Transformer turns ratio:

N = 0.707

Recommend Technitrol 1553-1

10K

Ω

10K

Ω

C*

C*

10K

Ω

10K

Ω

C*

C*

* Cap is 0.5 - 1µF ceramic BX/X7R

* Cap is 0.5 - 1µF ceramic BX/X7R

(FIGURE 9 OF MIL-STD-1553B)

(FIGURE 10 OF MIL-STD-1553B)

THRESHOLD A / B

THRESHOLD A / B

THRESHOLD A / B

THRESHOLD A / B

AMP CTL

AMP CTL