R&S EU4200C
ACARS Mode (External Modem)
6174.8456.02-01
3.88
3.9.3
Limitations/Notes
Note:
The adjustment of the RSSI output curve parameters does not
require rebooting the radio. The parameters will be set directly after they are
changed using the Service and Maintenance Tool R&S ZS 4200.
Note:
Changes done on the RSSI output characteristic via the Service and
Maintenance Tool R&S ZS 4200 will be valid only for the “User defined”
setting even if the “R&S Standard” configuration is selected.
3.10
ACARS Mode (External Modem)
0.
ACARS Mo de\ACA RS Mode " Radio ".doc
This chapter
This chapter provides information about the cabling and configuration of
ACARS mode.
3.10.1
Introduction/Overview
Introduction
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).
3.10.2
Cabling
Instructions
1.
Connect the RX audio and SQ signals with the ACARS modem.
Cabling
Fig. 3.76
ACARS mode cabling.
2
3
8
9
5
X10
External
ACARS
Modem
Radio
AUDIO_RX_A
AUDIO_RX_B
SQ+
SQ–
GND
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