Above is a diagram showing typical interconnection of the LP-PAN system.
Installation and Setup cont’d.
Initial LP-PAN Settings
Set JP1 & JP3 to open, JP2 to shorted, and JP4 to pins 2 & 3 (two closest to front of the board), as shown in the photo on page 9. Set
gain pot R29 to the middle of its range, and the Match pot on the rear panel level pot to full clockwise.
Connecting the Sound Card
The connection to the sound card will be largely determined by the sound card inputs. Here are some common possibilities…
Sound card with a pair of unbalanced mono inputs (usable with E-MU 0202, 1616m, M-Audio Audiophile Firewire and 2496).
Set Bal/Unbal switch to Unbalanced (IN). Use a pair of mono cables with the appropriate connectors on the sound card end. In the case
of the E-MU 0202, these will be ¼” phone plugs. Note: The left channel input on the E-MU uses a “funny” combo connector, but accepts
a ¼” mono phone plug. DO NOT use a stereo plug here, as it can get hung up on the ridges around the middle ring.
Sound card with a pair of balanced mono inputs (usable with Delta44, E-MU 1212m, 1616m).
Set Bal/Unbal switch to Bal (OUT). Use a pair of stereo cables with 1/8” male on LP-PAN end and ¼” male connectors on the sound
card end.
Sound card with a single stereo input (typical of inexpensive SoundBlaster type cards).
Set Bal/Unbal switch to Unbal (IN). Use a pair of 1/8” mono cables on the LP-PAN end, and a Y connector or adapter to combine them
into one stereo connector at the sound card end. Generally speaking, a red connector indicates right channel and white indicates left
channel, if marked. If using a commercial Y cable, make sure it is one stereo to two mono connectors, and not just wired in parallel.
In most cases, your monitor speaker will connect to the stereo output jack or headphone jack of the sound card or PC, depending on
setup. You may need a Y adapter for some cards to combine two mono outputs into a stereo monitor output. If you plan to use the sub-
receiver in PowerSDR, stereo speakers are very useful as the two receivers are routed to different channels.
Refer to www.telepostinc.com/souncards.html for specific details about driver settings, pre-configured mixer config files and latest
sound card info. Links to detailed installation instructions for each of the recommended sound cards are provided there.
Connecting the K3 to LP-PAN
Connect the RF input of LP-PAN to the IF output of the K3 using a short, high quality 50 ohm jumper cable with male BNCs on each
end.
The Mute connector can be left unused for now. For a complete discussion of the mute function, see the Operation section of the
manual.
LP-PAN can be powered from a RigRunner type power manifold, a wall wart (11-16VDC at 50mA) or the Accessory DC jack on the
back of the K3. The wire on the supplied power cable with the white line is positive voltage (center pin of DC connector).
Initial Software Installation
Download PowerSDR/IF Stage v0.92 from Scott McClements, WU2X’s web site, http://www.wu2x.com/sdr.html#powersdr Follow the
instructions on his web page for the basic software installation. Setup and preferences will be discussed on the next page of this
manual.
Download LP-Bridge from the TelePost web site at http://www.telepostinc.com/LPB.html Install in the default directory, following the
instructions on the LP-Bridge web page. Refer back here for detailed setup and configuration information.
Note: Both programs are beta versions, and as such are not complete, but should be fully functional at their current level of
development. You should be logged in as Administrator when installing these programs, or using another account with admin privileges.
K3 Firmware: You must be using MCU version 2.13 or later for full compatibility with LP-Bridge. This version added an IF frequency
offset parameter to the CAT protocol which allows automatic frequency correction with LP-Bridge. This feature is not supported in HRD.
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