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12
ColibriDDC User Manual
© 2022 Expert Electronics
HARDWARE DESCRIPTION
2.2
REAR PANEL DESCRIPTION
#
Name
Descript ion
6 SMA connector
“female”
Connector for HF and VHF antennas
.
7 BT (Boot) button
Button for the emergency firmware update.
8 EXT CTRL connector
Connector for controlling of the external devices
9 Reset IP address
button
Press to reset IP address and UDP
-
port of the receiver to default
state, IP: 192.168.16.200, port: 50001.
10
External reference
oscillator Input 10 MHz
10 MHz CMOS level
input
Appropriate Voltage amplitude for this input: 1...3 V Pk-to-Pk and
10 MHz frequency. Input impedance 2 kOhm.
Warning! Improper use or higher voltage may damage the
receiver!
2.2.1
Antenna
Before connecting the antenna, check the integrity of the antenna-feeder path.
For best results, the antenna should have an impedance of 50 Ohm to match the 50 Ohm
impedance of the receiver.
The antenna should have an SWR level not worse than 1.5:1. If the SWR is worse than 1.5:1,
match the cable and the antenna to the desired level.
Warning!
i
Always use E-t ype f errit e beads on ant enna and ot her cables, connect ed t o t he
receiver!
Summary of Contents for ColibriDDC
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