1
LP-PAN
Software Defined
IQ Panadapter
Operating &
Assembly Manual
April 2009
TelePost Incorporated
Rev. D7
Страница 1: ...1 LP PAN Software Defined IQ Panadapter Operating Assembly Manual April 2009 TelePost Incorporated Rev D7 ...
Страница 2: ... 27 Appendix A 28 Copyright and Trademark Disclosures LP PAN is a trademark of TelePost Inc Windows is a registered trademark of Microsoft Corporation Material in this document copyrighted 2007 8 TelePost Inc All rights reserved LP Bridge copyrighted 2007 8 TelePost Inc All rights reserved PowerSDRTM is an open source application for use with IQ based software defined radios and is a trademark of ...
Страница 3: ...ures LP PAN is a software defined IQ direct conversion panadapter Here is a list of current features Up to 192 kHz display on PC sound card dependent Switching quadrature detector for high dynamic range Strong buffer amp with low NF and very high LO isolation Excellent THD and IMD performance Ground isolated inputs outputs with mil spec audio xfmrs Low output Z balanced or unbalanced Fully balance...
Страница 4: ...4 Fig 1 C10 Not used 1 C12 18pF ceramic disc marked 18 Fig 3 K2 81pF marked 81 1 C13 10pF ceramic disc marked 10 Fig 3 K2 68pF marked 68 8 C14 16 22 24 27 29 32 37 0 01uF ceramic disc marked 103 Fig 3 5 C15 17 23 25 38 1uF 25V electrolytic Fig 2 1 C19 100uF 25V electrolytic Fig 28 2 C21 28 Kenwood 220pF 221 10 7MHz 0 001uF 102 K3 K2 Orion None 1 C26 10uF 25V electrolytic Fig 2 1 C30 47pF SM 47 Fig...
Страница 5: ...ig 12 1 R25 27K 5 1 8W res rd viol or Fig 12 1 may be supplied as alternate 1 R26 470 ohm 5 1 8W res yel viol br Fig 12 1 R29 200 ohm Pot Fig 23 1 SW11 4PDT Pushbutton Switch Keycap Fig 6 2 T1 2 Audio Output Xfmr 600 ohm Fig 25 1 U1 78L05 5V Regulator Fig 10 1 Y1 32 836MHz Crystal Fig 24 K2 19 68MHz Kenwood 35 35MHz TenTec 36 000MHz 10 7MHz 14 31818MHz 1 PCB Fig 26 1 Enclosure Fig 27 1 Power Cord ...
Страница 6: ...6 Fig 17 Fig 19 Fig 20 Fig 21 Parts List Cont d Fig 22 Fig 23 Fig 24 Fig 25 Fig 26 Fig 27 Fig 28 Fig 18 Fig 16 ...
Страница 7: ...y although it is not necessary with most modern solders A toothbrush and alcohol are good for this Only use rosin core solder Use of acid core solder voids the warranty Lead free solder is OK and the boards are RoHS compliant but it will be more difficult to remove parts without damaging the board should you have to Overview Below is the component placement diagram for the main PCB These markings ...
Страница 8: ...circuit is drawing the right amount of current before continuing This is done by monitoring total current draw of LP PAN while adding the chokes one by one You will need the following tools to complete assembly Adjustable soldering iron 800 degrees maximum 60 40 alloy solder 020 0 51mm diameter recommended for thermal pads Needle nose pliers Wire cutters Small Philips head screwdriver Digital Mult...
Страница 9: ...rts placement Install resistors Solder and clip leads after about six parts are installed to minimize clutter If you are unsure of the colors used by some of the manufacturers for the color code especially the 1 parts measure the value with a DMM Occasionally parts listed as 5 will be supplied as 1 due to availability when ordering Double check with DMM R2 31 10 ohm 1 8W res br blk bk R9 17 18 34 ...
Страница 10: ...7 0 001uF marked 102 Install D1 LED Install Q1 Keep leads short Install U1 Keep leads short Install R29 pot Install SW11 Install J3 You will need to clip off the two plastic tabs on the bottom of the connector off before installing Latch the rear pin first for strength then solder the front pin Install J11 Install the three 2 pin and one 3 pin headers Install a shorting jumper between pins at JP2 ...
Страница 11: ...ng 3 16 black screws and standoffs Loosely install the standoffs on the bottom and then slide the board into place rear first Attach the screws from the top while aligning the holes on the rear panel then tighten the screws underneath Install keycap on SW11 The enclosure top will be installed after calibration Connections Power 11 16 VDC center pin 2 5mm The lead with the white stripe on the suppl...
Страница 12: ...gh quality receiver AND sub receiver It rivals the K3 in many ways and adds some features not available on the K3 LP Bridge Provides a serial interface to the K3 and computer links to PowerSDR This allows linking of the K3 to PowerSDR for Frequency Mode Preamp setting Mute IF Offset and other functions A serial cable is required between the K3 and the PC to enable the communication link Without th...
Страница 13: ...r 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 ...
Страница 14: ...tage and LP Bridge Start LP Bridge In the section labeled K3 Com Port select the port that your K3 is connected to Make sure the K3 is set for 38 400 baud Warning If you are using a USB to serial adapter it is recommended that it use an FTDI chipset The KUSB adapter sold by Elecraft does not and will likely cause problems Click the Connect button The button will change to Disconnect unless there s...
Страница 15: ...e users like settings as high as 1000ms This determines the averaging when the AVG button is pressed in the main PowerSDR screen and trades off lower displayed noise for lag when updating the display All other settings can be left as they are for now Click Apply and close the Setup window On the main PowerSDR screen click on the Standby On button in the upper left and you should hear LP PAN on you...
Страница 16: ...all gain setting and load balance Note Filter peaking is only required for kit versions All adjustments are made while monitoring the PowerSDR display Load balance is done in conjunction with the Image Rejection controls in PowerSDR Filter adjustment To adjust the LP PAN filter tune to a strong carrier S9 or better and peak C35 for maximum strength If you don t have an insulated tuning tool a smal...
Страница 17: ...m or higher from a signal generator or nearby transmitter 2 Tune the K3 to put the image midway between the center of the display and the left end of the display 3 Set the Image Reject Phase and Gain adjustments for minimum image response Log the values 4 Retune the K3 to put the image signal midway between the center and the right end of the display Adjust for minimum response and log the values ...
Страница 18: ...ss This setting will work for all modes CW Pitch adjustment Another adjustment that must be made is for CW Pitch There are three adjustments that affect pitch in addition to the Global Offset adjustment that you just performed One is in the K3 one is in PowerSDR and the last is in LP Bridge Briefly they should all be set to the same value The CW Pitch adjustment in PowerSDR appears on the main dis...
Страница 19: ...microHam etc Select a port number and click Connect If the connection is succesful the button name will change to Disconnect If not you will get an error message If there is no connection to the K3 you will also get an error message to connect to the K3 first Applications which will connect to this port must be set for the selected port number not the K3 physical port number Additional settings sh...
Страница 20: ...layed levels are correct whether the K3 preamp or attenuator are on or off Not implemented yet On Top Allows you to set LP Bridge to display on top of other applications at all times Polling Sets the polling rate for LP Bridge This largely determines the tuning feel and S Meter update speed for programs which need this The default is 200ms CW Pitch This is a temporary control which provides a work...
Страница 21: ...s on using hardwae mute AGC Adjusts the AGC setting for PowerSDR reception only not K3 Preamp Adjusts the vertical scale to correspond to the K3 preamp condition LP Bridge is required for this to happen automatically With K3 preamp OFF the PowerSDR mode should be OFF With the K3 preamp ON the PowerSDR mode will be Low DSP Section These apply only to PowerSDR reception Sub Rx Section Applies to Pow...
Страница 22: ...en set properly they should sound the same Currently PowerSDR IF Stage does not support tuning of the sub receiver from the K3 s VFO B knob except in an alpha release It will be supported in the next release Support for this already exists in LP Bridge When it s supported VFOB will be linked to the sub rcvr Click on SubRX to activate it Normally the main receiver audio goes to the left speaker and...
Страница 23: ...Unless you plan to actually listen to the output of Skimmer not usually the case the CW Pitch Hz setting can be left at the default of 600Hz or any other value Set Audio IF Hz using the following formula CW Pitch Global Offset Audio IF Hz CW Pitch is the setting used on the K3 LP Bridge and PowerSDR they should all be the same Global Offset is the setting in PowerSDR This will get you very close Y...
Страница 24: ...is operated in a doubly balanced configuration and provides balanced outputs to the preamps Very low noise preamps with rail to rail outputs were chosen to maximize dynamic range The preamps are direct coupled to a pair of very broadband transformers to preserve the balanced nature of the design and minimize 2 nd harmonic distortion The outputs of the transformers can drive either balanced or unba...
Страница 25: ...25 Schematic Note A high resolution version of the schematic is available on the LP PAN web page next to the think for the manuals ...
Страница 26: ...om rig to rig I don t see my sound card listed under the available sound cards in the Audio setup tab 1 Check that your sound card is properly installed You can do this in Device Manager 2 It is wise not to make your LP PAN sound card the Windows default This can be checked under Sounds and Audio Devices in the Windows Control Panel 3 Update your sound card s driver to the latest available from th...
Страница 27: ...http www telepostinc com LP PAN html For an up to date comparison of sound cards check out the Sound Card page on the TelePost Inc website at http www telepostinc com soundcards html Warranty Factory assembled LP PANs are warranted against failure due to defects in materials and workmanship for one year from the date of purchase from TelePost Inc Warranty does not cover damage caused by abuse acci...
Страница 28: ...28 Under no circumstances is TelePost Inc liable for damage to your amateur radio equipment resulting from use of the LP PAN whether in accordance with the instructions in this Manual or otherwise ...
