Acars Mode (External Modem); Introduction/Overview; Cabling; Fig. 3.82 Cabling For Operation With The External Modem (Acars) - R&S 4200 Series Operating Manual

ACARS Mode (External Modem)

3.10 ACARS Mode (External Modem)
0.
ACARS Mode\ACARS Mode "Radio".doc
This chapter
3.10.1

Introduction/Overview

Introduction
3.10.2

Cabling

Instructions
Cabling
This chapter provides information about the cabling and configuration of
ACARS mode.
The radio can be configured for ACARS data operation (2400 Bps).
In this case a faster RF front-end control is in action. The attack and decay
time is in accordance with the ETSI EN 300676 standard. An external
ACARS modem needs to be used for ACARS operation. Communication
between the modem and the radio is via 2 tones: 1200 Hz (bit change from
previous) and 2400 Hz (no bit change from previous).
1. Connect the TX and RX audio signals, the PTT and SQ signals with the
ACARS modem.
Radio
X5
AUDIO_TX_A 2
AUDIO_TX_B 3
+PTT 8
9
–PTT
5
GND
X10
AUDIO_RX_A 2
3
AUDIO_RX_B
8
SQ+
9
SQ–
5
GND
Fig. 3.82 Cabling for operation with the external modem (ACARS).
3.87
R&S XU 4200
External
ACARS
Modem
6166.5368.02.01