[hpsdr] PowerSDR/OpenHPSDR mRX PS v3.3.6 released

[Doug W5WC]

All,

PowerSDR/OpenHPSDR mRX PS v3.3.6 has been released.

This release can be downloaded from the openhpsdr.org website.
http://openhpsdr.org/download.php

This release includes another tool for your Noise/Interference Toolbox.  
This particular tool, Multi Notch Filter (MNF), allows you to specify up to
1024 notches.  The notches are specified by RF frequency and width and will
be invoked, as needed, when they overlap the passband.  This feature is
useful for those who have interference that consistently appears on specific
frequencies.

To avoid phase distortion, the notches are implemented with linear phase.
Also, they introduce no additional processing delay nor do they consume any
additional CPU cycles once you're on frequency and the notches are set up.
This is all accomplished by simply "cutting" the notches into the existing
bandpass filters rather than adding additional filters.

Sorry, there's currently no fancy on-panadapter UI for this.  If you have
programming talents and would like to write one, please let us know.

To enter notches, in Setup, go to the new DSP / MNF tab.  To Add a notch,
click Add then enter the Center Frequency and Notch Width and click Enter.
Once multiple notches are in the database, you can scroll back and forth
through them using the up/down arrows on the "Notch #" 
control.  When you add a new notch, it will be added immediately after the
notch being viewed.  You can Edit notches by clicking Edit, making your
changes, then clicking Enter.  You can Delete a notch by scrolling to the
notch and clicking Delete.  If you were to enter very narrow notch widths
(less than 200Hz with default filter settings), you might not achieve the
full attenuation of >100dB.  By leaving "Auto-Increase width" checked, if
your specified width is not enough to achieve >100dB notch depth, it will be
automatically increased for you when the filter is cut in the passband.
When you are entering a new notch, rather than typing in the Center
Frequency, you also have the option to tune VFO-A to the desired frequency
and then click the VFOA button.

Other changes include:
- Added CAT command for Spectral Noise Blanker ZZNN RX1 & ZZNO RX2.
- Added 25Hz Step Tune.
- Extended CAT command ZZPB to set & get 10dB, 20dB, and 30dB settings.
- Removed the subnet mask requirement for static ip addresses.
- Extended out-of-band transmit between 29.7-61.44MHz.
- Improved Russian language translation for the ToolTips by Michael, R2AGG.
- Corrected a problem with the VFO not updating when dragging the panadapter
in CW mode.

Thanks & 73,

Doug, W5WC
Warren, NR0V