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LP-PAN Hardware Installation
shows one of the most
common LP-PAN configurations. Other popular rigs are interfaced
similarly , such as FTdx3000/5000, although they use an RCA connector
for the IF output. The FT950/2000 is similar except that it
a 3rd party interface board (IF-2000 from RF
Space) to be mounted in
place of the DMU interface board in the radio. The IF-2000 in this case
provides the IF output jack. Older Kenwoods have an IF output, but will
an RS232C “level converter” to provide a serial port.
The sound card shown is the Asus Xonar U7, but the U5 is similar and a
little cheaper. The only difference in terms of hardware is that the
input and output jacks are on the back of the U5. They are labeled with
a microphone icon for input and a headphones icon for output. The
control panel selects whether the input will be mic or line level, and
whether the output will appear as headphones or speakers.
the system as
shown using the following cables…
K3... IF – 50 ohm
cable with BNC male
connectors on both ends, typically RG-58U.
FTdx3000/5000... IF - 50 ohm jumper with male BNC to male RCA
– Y cable with 1/8” (3.5mm) stereo connector on one end and 8”
on the other end. These can be homemade, premade or made up of a
premade cables and adapters. A common configuration is Y cable with
stereo 1/8" (3.5mm) on one end, and red/white RCA connectors on the
other end. Adapters are used to convert the RCAs to 1/8" (3.55mm)
mono. NOTE: L / R cables need to be swapped for
FT950/2000, or the "Swap I/Q" checkbox on the input tab in NaP3 needs
to be checked (the IF-2000 boards flips the sidebands).
- Use the cable supplied with LP-PAN 2 (2.5mm plug). The end with
tinned wires should be connected to a suitable source of regulated
the same ground as the rig. This can be obtained from the switched 12V
of the rig. The “+” lead is marked with a white stripe.
RS-232C... Connect to a serial port on your PC, or to a
USB to serial adapter. We recommend adapters which use FTDI chipsets.
We recommend against adapters which use Prolific chipsets.
– Use cable supplied with sound card. Connect to USB 2.0 port on PC.
1.1 is permissible, but will limit bandwidth to 48 kHz. If you must use
should have its own power supply and be USB 2.0 compliant.
Speaker – Requires 1/8” (3.5mm) stereo plug. It is smart to use
speakers with a
volume control, even though the U7 has its own volume control, and NaP3
has volume sliders. Headphones can be anywhere from 8 to 64 ohms. The
U7 control panel allows you to select a matching impedance. The main
rcvr in NaP3 feeds the left channel and the sub rcvr feeds the right
to LP-PAN 2
to ASUS Xonar U7