Fldigi - Kambing UI

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Throb The THROB family of modes use two tones at a time. These tones are also amplitude modulated and can be a single tone for some symbols. The mode has no Forward Error Correction, and is difficult to tune. It is fairly sensitive and moderately robust. Keyboard-to-keyboard QSOs are reasonably fast. Tuning must be very accurate, and the software will not tolerate differences between transmit and receive frequency. The amplitude modulation component of THROB is a raised cosine AM modulation of each symbol. This combined with two tones transmitted at the same time, means that a very linear transmitter is required. It also gives the mode its very unique sound. You will never mistake Throb for any other mode. For THROB, nine tones are used, spaced 8 or 16 Hz. For THROBX, 11 tones are used, spaced 7.8125 or 15.625 Hz. Fldigi supports the following Throb baud rates and tone spacings: Mode Symbol Rate Typing Speed Bandwidth THROB1 1.0 baud 1.0 cps (10 wpm) 72 Hz THROB2 5 2.0 baud 2.0 cps (20 wpm) 72 Hz THROB4 4.0 baud 4.0 cps (40 wpm) 144 Hz THROBX1 1.0 baud 1.0 cps (10 wpm) 94 Hz THROBX2 2.0 baud 2.0 cps (20 wpm) 94 Hz THROBX4 4.0 baud 4.0 cps (40 wpm) 188 Hz Waterfall appearance and the sound of each throb mode can be seen and heard at Sight & Sound. Contents FldigiContents Throb Throb 74
Digiscope Display - WWV mode The WWV mode is used to measure the offset of the sound card oscillator. It does this by comparing the timing loop for the sound card measurements against the clock tick signal that is transmitted by WWV and WWVH. The sampling rate for the sound card is set to 8000 samples / second. The sound card is also initialized to take samples in 512 blocks. This block sampling is what sets the basic timing mechanism for the thread that reads the sound card, sends data to the waterfall, and sends data to the modem signal processing functions. A process of filtering is used that simultaneously reduces the sampling rate. A single FIR - decimation in time type is used with a total time division of 8. The resulting signal is then power detected and further filtered with a filter called a moving average filter. The moving average is very good at detecting the edge of a pulse such as the 1 second tick transmitted by WWV. This output is then displayed in a manner very similar to a FAX signal. Each scan line represents the received signal over a 1 second interval. The bright white line is the time tick. You can see a very slight slope from left to right as the signal goes from top to bottom of the display. Open the configure dialog box to the "SndCrd" tab. You are going to be adjusting the "Rx corr Rate" while you observe the effect of this control on the slope of the time tick line. Tune in WWV or WWVH on 2.5, 5.0, 10.0 or 15.0 MHz in the AM mode. This seems to give the best signal view. Select the WWV modem and allow the data to begin to accumulate in the digiscope display. When you can clearly see the bright tick line, move the cursor to the bottom of the line and left click at that position. That will resync the digiscope display and put the ensuing tick marks at the center line red graticule. Then right click anywhere in the digiscope display. That changes the zoom level to show more detail regarding the slope of the time tick line. The zoom level increases by a factor of 5. Right clicking again restores the original zoom level. I recommend making the adjustments to the Rx corr Rate control in the x5 zoom level. If the slope of the time tick line is positive you will need to apply a negative value to the Rx corr Rate. If it is negative then a positive correction is needed. Start with a correction of 0 ppm and observe the slope. Try a value of 1000 ppm and observe the slope. Again, try a -1000 ppm correction and observe the slope. The following are some observations made on 10 MHz WWV, DCF-77 and RWM under less than ideal conditions. -1000 ppm WWV 5x scale FldigiContents Digiscope Display - WWV mode 0 ppm WWV 5x scale +1000 ppm WWV 5x scale ppm WWV 5x scale Digiscope Display - WWV mode 75 +120
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• License • Recognitions • In
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Recognitions This software would no
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Installing Fldigi Precompiled Binar
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Installing Fldigi on Windows The po
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The help, images, logs, scripts and
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Configuring The first time you exec
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Waterfall Configuration Waterfall C
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Rig Control If your transceiver is
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RigCAT commands and responses are d
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Sound Card Configuration Sound Card
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FldigiContents Sound Card Configura
Page 23 and 24: FldigiContents Colors & Fonts Tab C
Page 25 and 26: was previously worked the operator'
Page 27 and 28: Id Configuration Fldigi offers seve
Page 29 and 30: Miscellaneous Configuration The swe
Page 31 and 32: Callsign DB Configuration FldigiCon
Page 33 and 34: ♦ MFSK ♦ MT-63 ♦ PSK ♦ Oliv
Page 35 and 36: Spot button - ♦ Beginners' Guide
Page 37 and 38: X1 scale X2 scale X4 scale FldigiCo
Page 39 and 40: sound card is satisfactory, YELLOW
Page 41 and 42: Changing the weight, dash/dot or ed
Page 43 and 44: • Catalog # 270-054 • Catalog #
Page 45 and 46: Fldigi generates CW using AFCW (A2)
Page 47 and 48: DominoEX - Operating Fldigi can ope
Page 49 and 50: DominoEX Configuration Enter the se
Page 51 and 52: Feld Hell Configuration The Hellsch
Page 53 and 54: MFSK Picture Mode Fldigi can send a
Page 55 and 56: Picture with a slant This is what t
Page 57 and 58: MT63 Configuration MT63 is an ortho
Page 59 and 60: Olivia Configuration Olivia is a fa
Page 61 and 62: over multi-hop paths. In many insta
Page 63 and 64: Contents FldigiContents Psk Viewer
Page 65 and 66: Fldigi has a multi channel psk view
Page 67 and 68: It is possible to use fldigi to gen
Page 69 and 70: Attach an audio cable from the Rt.
Page 71 and 72: Thor Thor is a new forward error co
Page 73: Thor Configuration The decoder can
Page 77 and 78: Period of operation: 24 hours per d
Page 79 and 80: TUNE Mode Too often you see an over
Page 81 and 82: Function Keys Keys F1 through F12 a
Page 83 and 84: ♦ Waterfall display text by simpl
Page 85 and 86: Digiscope Display Fldigi provides s
Page 87 and 88: Macros Macros are short text statem
Page 89 and 90: The macro reference in the pick lis
Page 91 and 92: Exec Macro The ... macro is desig
Page 93 and 94: Querying an external database The
Page 95 and 96: QSO Logbook Fldigi maintains a larg
Page 97 and 98: FldigiContents QSO Logbook word and
Page 99 and 100: Contest How To FldigiContents Conte
Page 101 and 102: Saving the entire session Select th
Page 103 and 104: The exchange macro is basically the
Page 105 and 106: http://pskreporter.info/cgi-bin/psk
Page 107 and 108: There are five levels of event logg
Page 109 and 110: modem.get_name s:n Returns the name
Page 111 and 112: Command Line Switches The following
Page 113 and 114: Rig Xml Howto This document describ
Page 115 and 116: the tag pair FldigiContents Rig Xm
Page 117 and 118: BINARY or DECIMAL This is an exampl
Page 119 and 120: EOF ; close(KML); #################
Page 121 and 122: parseUALR A simple parser to create
Page 123 and 124: snip ------------ copy the followin
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RST & RSQ Reporting RST Is the trad
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Build Info The following is obtaine
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This target will generate two bundl
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