© Copyright 2013 Zephyr Engineering, Inc
UDPSDR-
HF2 User’s Manual
15
Version 3.5
– 3 October 2013
(I.e., it was not programmed into the configuration flash ROM), then the MAC address is
set to
00:07:ed:01:23:45
. This is in the Altera block of IP addresses with the last three
octets set to 0x012345.
Note
: In order to use multiple SDRstick
TM
radios on the same network, you
MUST
set
unique MAC addresses for each radio that are different from any other MAC address on
the same network.
To determine its IP address, the SDRstick
TM
first looks to see if there is a valid UFB.
If there is a valid UFB, the SDRstick
TM
then looks to see if the DHCP client is enabled. If
it is, then a DHCP request is broadcast. If an IP address is received from the DHCP
server, that IP address is used. If the DHCP request is unsuccessful (for example, a
timeout occurs) or the DHCP client is not enabled, the SDRstick
TM
uses the IP address
from the UFB instead.
If there is no valid UFB, the SDRstick
TM
broadcasts a DHCP request. If an IP address is
received from the DHCP server, that IP address is used. If the DHCP request is
unsuccessful (for example, a timeout occurs), the SDRstick
TM
uses the default IP
address of
192.168.1.25
.
3.4 Step QS4
– Make External Connections
The SDRstick
TM
requires three external connections to function: antenna, Ethernet data
connection and power input.
3.4.1 QS4b
– Antenna
Connect an antenna to the J5 SMA connector. Note that there is no bandpass filtering
at the receiver front-end. Excessive voltage at the antenna jack can damage the
receiver. The input attenuator can mitigate some input overload conditions, but any
voltage above about 3.5V p-p may damage the input circuitry.
3.4.2 QS4c
– Ethernet Data Connection
Connect the BeMicroSDK Ethernet port either directly to a PC network port or to a LAN
through a 100Mbps switch. Even though the port hardware supports 10Mbps and
100Mbps, a 100Mbps connection is required for proper operation. (Even at the lowest
sample rate, 10Mbps Ethernet has insufficient bandwidth to support this receiver.)
3.4.3 QS4d
– Power
Connect the power supply to J3. The BeMicroSDK and UDPSDR-HF2 combination
requires about 950mA at 5VDC to operate properly. While the recommended way to
supply power is through connector J3, you may also supply power through the USB
connector if the USB port will supply enough power.