|Display shows noise but no signals
||Check audio and RF cabling.
Make sure the correct sound card and driver are selected in the SDR app.
|There are two sets of signals that move in
opposite directions as I tune, ie. there is no image rejection.
||Check that you are getting audio from both
I & Q channels.
Check sound card settings
Read the section titled Eliminating Images for a more detailed explanation of the causes and cures of images.
|The audio in the SDR app drops out
||Increase audio buffer size to 2048 or 4096.
Read the excellent paper Vista Tuning for LP-PAN.pdf written by Dave, W8FGU. It is useful for all Windows versions.
Increase the latency setting in the SDR app's audio setup.
|When I start PowerSDR, the audio
||Increase the latency setting in the SDR
app's audio setup. Recommended settings are 2-10ms for ASIO driver, and
25ms or more for MME driver.
|There is a “hump” or “hole” in the noise
floor near the center of the display.
||Check your cabling for a loose connection
Check the Bal/Unbal switch on the back of LP-PAN
Check the "ground lift" jumpers in LP-PAN
Check the ground lift jumpers on your sound card (they should both be in lift position for E-MU 0202/0204)
Check for power supply ground differences between radio and LP-PAN.
Could be the result of using non recommended sound card
Could be an anomaly of the rig's IF output (poor filter matching in older Kenwood, for instance).
|The signal's frequency in the display does
not match the rig frequency.
||Perform the IF Frequency offset
adjustments in SDR app per the procedure in it's Calibration section.
Make sure your settings match the pictures, except for the Global
Offset which will vary from rig to rig. Adjust Global Offset to sync
the display with your rig.
|I don’t see my sound card listed under the
available sound cards in the Audio Input / Output selector.
||Check that your sound card is properly
installed. You can do this in Device Manager.
It is wise not to make your LP-PAN sound card the Windows default.
Update your sound card’s driver to the latest available from the manufacturer’s website.
If your sound card is USB, it is usually recommended to use a USB 2.0 port. Use of a USB router for a sound card is not recommended.
Try all available drivers in the Drivers selection box for your SDR app. ASIO is the preferred driver if available, followed by MME.
|E-MU Sound card will only work at 48 kHz.
||Make sure your USB ports are 2.0. The E-MU
0202/0204 defaults to 48 kHz with USB 1.1 ports. Turn off E-MU and turn
it back on. Use E-MU control panel to set a new sampling rate.
|I can’t get the rig to go to VHF bands
when connected to PowerSDR.
||Go to IF Frequencies tab in your SDR's
applicable Setup page and set Frequency Limits Max to the highest
frequency you use.
|I can’t connect to my rig.
||Make sure that “SDR-1000” is selected as
the radio model in the Setup>General>Hardware Config tab if
you're using PowerSDR/IF.
Make sure you have the correct rig type, com port and baud rate set in the Rig Connection tab for your SDR app.
Make sure that the baud rate in the rig is set to match the baud rate set in the SDR app.
Make sure that no other program is connected to your rig.
Make sure that you didn’t accidentally set up the PowerSDR/IF CAT interface for the same com port as your rig if using PowerSDR/IF.
If you're using a USB-to-serial adapter, make sure that Windows hasn't changed the port number. ALso, make sure you have the latest driver to match your OS.
Make sure that the SDR app hasn't reverted to COM1 because your rig was off or LP-Bridge / LPB2 wasn't running when it was supposed to be.
|Rig connection is erratic.
||Make sure that polling isn't set too low.
It should be in the 200-500ms range. If you are using a USB-to-serial
adapter, make sure you have the correct driver. In general, adapters
with FTDI chipsets are preferable to ones with Prolific chipsets.
Many of the problems associated with the software have to do with wrong or corrupt entries in the database files for PowerSDR/IF or NaP3. To understand how to address problems and correct them, it helps to know what files are created when the programs are installed, and where they are stored.
main installation folder can be found in this folder… PowerSDR/IF
Support is also available directly from TelePost through at firstname.lastname@example.org anytime or telephone at 734-455-3716 during normal business hours. There is also a Yahoo User Group at http://groups.yahoo.com/group/LP-PAN/ with a large number of helpful users.