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4.30 - Standard Keystroke Commands

4.30.1 - Overview

These are the key commands that are in effect when SdrDx is first installed. You can change any of them using keystroke remapping if you like.

When first learning the software, it is usually better to leave the defaults intact so the descriptions here in the documentation will be of most use. Later, when familiar with the software, setting up specific keyboard mappings based on what you end up using is easier.

The only immediate exception to this is if you run into a situation where your keyboard doesn't have the keys you need.

4.30.2 - Key Modifiers

Here's a reminder for the various keyboard modifiers:

a represents the A key on your keyboard, pressed by itself.

 A represents SHIFT pressed with the A key on your keyboard, or in other words Shift+A

^ A represents CONTROL pressed with the A key on your keyboard, or in other words Control+A

° A represents OPTION or ALT pressed with the A key on your keyboard, or in other words Option+A or ALT+A

 A represents CMD or WINDOWS pressed with the A key on your keyboard, or in other words +A

in addition to these, you will encounter some of these combinations:

^⇑ X °⊗ X ^⊗ X  X ⇑° X ⇑⊗ X ^⇑°X ⇑°⊗ X ^°⊗ X ^⇑⊗ X ^⇑°⊗ X

and are how the cursor (arrow) keys are depicted.

4.30.3 - Commands


^ F1 through ^ F15: Broadcast band presets (these presume ** SDR bandwidth of 100 KHz, because they start centered above the low band edge) Press O and these turn into time station presets, press O again and they change back to bands.


^ 1 through ^ 0: Amateur band presets (these presume SDR bandwidth of 100 KHz, because they start centered 40 KHz above the low band edge)


 F1 through  F15: Store memory - these are saved in your ** home directory. (See also  I )


 1 through  0: Store memory - these are saved in your home directory. (See also i )


F1 through F15: Recall memory (match presets if not saved) **


1 through 0: Recall memory (match presets if not saved)

Note:

"Preset Zones": When using the memories in real life, at first I found that I would memorize a station here, then one there... I was pretty disorganized. After a while I found myself trying to use the 1 ... 0 and F1 ... F10 keys in the same order as the ten spans of the signal graph area.

But then I had to count them. So at the top, I added the numbers 1 though 9 and zero to match the number keys; now, if I see a signal in a band, I use the number or FKEY that matches the zone number, and then it is easy to remember which memory key to use to get back to a particular signal. A long explanation for a simple feature, but I think you'll also find it useful if you try it.

This feature works very well with i, which initializes each of the ten memories in the 1 through 0 keys with the center of each of the ten zones on-screen at the time it is pressed. So one approach to operating is, tune to a band segment, then press i; then when you see a signal you want to capture, press the number key that matches the on-screen zone, that will get you close; then use the + / - , { } and square bracket keys to fine tune, press shift-number for the zone, and now you've got a signal captured for that zone. Another benefit of i is it will keep previous memories from taking you off-band, which can be inconvenient.

If you don't like this feature, you can turn it off in the dialog accessed with DSP — just uncheck   Draw Zones . That will disable the drawing and the i command effect.


a: audio dialog


 A: AM mode


b: noise Blanker dialog


^ B: set main window to 1280 wide by 1024 high at top left


c: load waterfall palette (see below)


 C: CW (CWL) lower mode


d: display dialog


 D: tweak AGC metering


^ D: tweak S metering. 499 setting matches RFSPACE SDRs. Other values may be used to calibrate SDRs such as the FCD or FCD+.


e: adjust current notch filter frequency downwards by 10 Hz


 E: adjust current notch filter frequency downwards by 100 Hz


^ E: adjust current notch filter frequency downwards by 1 Hz


f: change signal area font size


 F: FM mode


g: select previous notch


^ G: execute "ss" program in home directory as detached process with a parameter of 1. You can use this to fire off just about anything you can think of. Just make ss (or any other name - you can set the name by right clicking on any EX button) a Python or Perl or other script and do whatever you want. I use it to cause SdrDx to do a capture of the spectrum and waterfall and upload it to slack using a webhook. So when I want to share my RX with a friend, it's control-g and done.


 G: change grid color


h: select next notch


 H: select high or low pass filter


i: set memories 1...0 to zone centers/1 KHz, current filts


^ I: execute "ss" program in home directory as detached process with a parameter of 2. You can use this to fire off just about anything you can think of. Just make ss (or any other name - you can set the name by right clicking on any EX button) a python or perl or other script and do whatever you want.


 I: set memories F1...F10 to zone centers/1 KHz, current filts


i: adjust low pass filter frequency downwards by 250 Hz ***


k: adjust low pass filter frequency upwards by 250 Hz ***


 K: Keystroke reference


l: low pass filter on/off ***


^ L: make output buffer larger, increase latency


 L: LSB mode


m: mode dialog


 M: Set notches for 60 Hz filtering w/current Q


^ M: Set one of ten available general purpose markers


↑^M: Set all ten available general purpose markers to span the current demodulator bandwidth


n: network dialog


^ N: execute "ss" program in home directory as detached process with a parameter of 3. You can use this to fire off just about anything you can think of. Just make ss (or any other name - you can set the name by right clicking on any EX button) a Python or Perl or other script and do whatever you want.


 N: Set notches for 50 Hz filtering w/current Q


^ O (the letter O): execute "ss" program in home directory as detached process with a parameter of 4. You can use this to fire off just about anything you can think of. Just make ss (or any other name - you can set the name by right clicking on any EX button) a Python or Perl or other script and do whatever you want. I use it to cause SdrDx to do a capture of the spectrum and waterfall and upload it to slack using a webhook. So when I want to share my reception with a friend, it's control-g and done.


O: toggle time/bands for presets


 O: Span + (or zoom in, if ZOO is on.)


p: original / alternate palette


 P: Span - (or zoom out, if ZOO is on.)


q: variable tuning up


^ Q: IF shift up


 Q: variable tuning step change (up)


R: adjust current notch filter frequency upwords by 10 Hz


 R: adjust current notch filter frequency upwords by 100 Hz


^ R: adjust current notch filter frequency upwards by 1 Hz


^ S: make output buffer smaller, reduce latency


s: SDR dialog


 S: Synchronous AM (SAM) mode


T: Toggle transmit via network on/off


 T: Toggle current notch filter on/off


 U: USB mode


T: variable tuning down


^ V: variable IF shift down


 V: variable tuning step change (down)


W: Signal grid spacing


 W: CW upper (CWU) mode


x: center current demodulator tuning


 X: Shift Demod freq -5 KHz


Y: master toggle switch for all 8 notches


 Y: master reset switch for all 8 notches


Z: zero I/Q spurs


 Z: Shift Demod freq +5 KHz


;: Wider notch


': Narrower notch


Return: Run/Stop


 RETURN: Direct Frequency Entry in KHz. Accepts letter suffix to specify demodulator mode, case insensitive:


For instance, 14230u will tune to 14230.000 KHz in USB

Also accepts < and > as flags for 10 KHz, also , and . for 5 KHz, also ; and ' for 1 KHz offsets from center frequency. This is to allow tuning of the various narrow bandwidth demodulators without them including the center frequency, where many SDRs emit spurious carriers that can interfere, particularly in the AM and SAM modes.

Examples:

14230u<14230 KHzUSB-10 KHz offset
6180a,6180 KHzAM-5 KHz offset
5000a>>.5000 KHzAM+25 KHz offset
14230u>14230 KHzUSB+10 KHz offset
10000a.10000 KHzAM+5 KHz offset
14178u<<<<<<<;;14178 KHzUSB-72 KHz offset


Spacebar: Audio Mute


/: Noise blanker on/off toggle


Home: Resets the waterfall adjustment to zero.


, : +/- 5 KHz for AM SWL (center + demod) (shift to hold center)


, : +/- 10 KHz for AM BCB (center + demod) (shift to hold center)


° ←, ° →: +/- prev/next SW band


° ↑, ° ↓: +/- prev/next HAM band


^ →, ^ ←: +/- lower bandwidth edge


^ ↑, ^ ↓: +/- upper bandwidth edge


,, .: +/- 9 KHz for AM BCB (center + demod)


^ [ ^ ] +/- 1 Hz for SSB tuning (demod only)


[ ] +/- 10 Hz for SSB tuning (demod only)


{, } { }: +/- 100 Hz for fast SSB tuning (demod only)


^ _ and ^ =: +/- 500 Hz for really fast tuning (demod only)


 _ and  =: +/- 1000 Hz for really fast tuning (demod only)


- and -: +/- 2000 Hz for really fast tuning (demod only)


< and >: +/- span width


PgUp, PgDn: Adjust waterfall colors (this is a much finer adjustment than the dB GUI element) adjustment level is indicated by an "LCD" display on the main window panel.


 PGUP,  PGDN: Adjust audio volume.


^ PgUp, ^ PgDn: Fine adjust CWO.


^⇑ &UARR; : Increase SSP threshold.


^⇑ &DARR; : Decrease SSP threshold.




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