uAvionix echoUAT User Manual

18
UAV-1001006-001
ECCN 7A994
as a ground plane. The ground plane should be connected to the airframe
ground bus using a braided cable.
7.1.1 Antenna Cable
The echoUAT is designed to meet ADS-B TSO Class B1S requirements
and excessive loss in the cable and connectors will degrade the transmitter
output power. Since the cable is used for transmit and receive signals,
excessive loss in the cable will result in degraded ADS-B receive capability.
The installed cable should exhibit the following characteristics:
• 1.5 dB maximum loss between the echoUAT and the UAT antenna
• Impedance of 50 ohms
• Contains double braided shields or has foil and a braided shield.
The following table is a guide to the maximum usable lengths of some
common cable types. Actual cable loss varies between manufacturers.
There are many variants, and the table is based on typical data. Use it as a
guide only and refer to the manufacturer’s data sheet for your specific
chosen cable for accurate values.
1.5dB÷Insertion
loss.
Insertion
Loss
MIL-C
17
Specialists
SSB
Electronic
Max length (m)
(dB/m)
2.54 meters
0.59
M17/128
2.54
0.59
RG400
3.16
0.47
3C142B
3.81
0.39
RG304
4.5
0.33
Aircell 5
5.25
0.29
RG393
311601
6.42
0.23
311501
6.81
0.18
Aircell 7
8.22
0.18
311201
12.59
0.12
3108801
When routing the cable:
• Route the cable away from any significant heat sources

uAvionix echoUAT Specifications

General

Type	ADS-B Transceiver
Category	ADS-B
Frequency Range	978 MHz
Mounting	Surface mount
Operating Temperature	-20°C to +55°C
Standards	DO-260B
Power Output	250W nominal
Interface	RS-232
GPS Input	NMEA 0183
Compliance	TSO-C154c