FLdigi operating with the RIGblaster interface
Credits: (W1HKJ – M0GLD – WA5ZNU – ZL1BPU)
FLdigi is a computer program intended for Amateur Radio Digital Modes operation using a PC (Personal Computer). Fldigi operates (as does most similar software) in conjunction with a conventional HF SSB radio transceiver, and uses the PC sound card as the main means of input from the radio, and output to the radio. These are audio-frequency signals. The software also controls the radio by means of another connection, typically a serial port.
FLdigi is multi-mode, which means that it is able to operate many popular digital modes without switching programs, so you only have one program to learn. FLdigi includes all the popular modes, such as: CW, DominoEX, HELL, MFSK, MT63, Olivia, PSK, RTTY, THOR, Throb, NBEMS Modes.
Radio Shack 1/8 “Y” M/F/F cable (1ea) RS 42-2570
Radio Shack 1/8 “M/M” cable (2ea) RS 42-2387
Strap P1 to match your radio's Microphone. (i.e. RJ45 IC706 page 9, page 10).
Set Audio Level Control full counter-clockwise.
Cable RIGblaster to radio and computer, as shown in RIGblaster manual’s hookup diagram i.e.:
Cable RIGBlasrer-IN to computer speaker OUT
Cable RIGBlaster-OUT to computer speakers (The RIGblaster interface will allow computer speakers to continue to operate for
music etc. Don't use low impedance un-amplified speakers).
Download FLdigi v3.11.4 Digital software: www.w1hkj.com/fldigi.html
FLdigi Help: v3.11
Computer Volume Control:
Record: select Line-in - set all Volume controls 1/2 from bottom - Balance sliders to middle & EXIT
Playback: un-mute all – set all Volume controls 1/2 from bottom - Balance sliders to middle & EXIT
Set all IF Filters to OFF (or as wide as possible)
Set Audio RF to MAX - Set AF volume not to overdrive signals on the Waterfall Display window
Set SQL to minimum (CCW)
Set VFO to: 14.070
Set Transmitter output power to 1/2 manufacturer’s rated power output, 45 watts or less is a
good operating setup for a 100 watt transmitter.
Set Mode to USB
Set Processor to OFF set
set SWR ON ALC ON
Connect antenna (connecting a Dummy Load will give bad ALC reading in Digital setup)
Adjust Tuner for 1:1
Speak into the microphone, adjusting MIC control so that ALC doesn’t occur above the
ALC Zone indicator.
Fldigi Software Program setup:
Operator: Type Callsign, Name, QTH,
Colors & Fonts = Defaults
User Interface UI General = Defaults
Waterfall – Display = Defaults
Rig Control – Hardware PTT = Use separate
, Device = COM 1, Use RTS/TDR Serial Port
Sound Card – Audio = Defaults
IDs = Transmit Mode = ID; Transit Mode = RSID
Misc. – Sweet spot = Defaults
Contest = Defaults
QRZ = Defaults
MACROS: right click on a MACRO, type in MACRO info. For ie.: (CQ - BTU – Signoff)
Select: Op MODE - PSK (BPSK31)
Select: WF Waterfall (FFT – Sig.)
Select Upper Signal Level (db) = -30
(db) = 69 Select Signal Range
Select Waterfall scale = X2
Select Waterfall Drop Speed =
Do not Select RSID; must be off for Transmitting mode
Left Click on the HamScope Waterfall Display at any TX frequency between 100hz and 2500hz
of the selected VFO’s frequency.
Left Click on Tx (Transmit) button --Transmission starts. (Don’t use TONE, it doesn’t allow for
a good IMD reading at a receiving station)
Adjust RIGblaster Audio Level Control clockwise, stopping as transmitter output power reaches MAX
(ie. 45 watts) keep an eye on your ALC so that ALC does not occur. Run with NO ALC
indicating occurring; any ALC indicating means that it is distorting your TX Signal,
causing harmonics. The receiving Operator’s HamScope Spectrum analyzer will display
incorrectly adjusted Transmit signals.
Left Click on Rx (Receive) button -- Transmission stops.
Note: The RIGblaster Audio Level Control is the most precise way to adjust the
Soundcard output voltage into the radio. The Microsoft Volume controls were
designed to vary the voltage, through a range of reasonable outputs, for Speakers;
They were not designed to be adjusted so precisely as to be reliable set to
5 millivolts for PSK31 operating.
The MIC Gain, once set for Phone, should not be readjusted for Digital PSK31;
that would cause operating problems in some Modes like SSTV.
ALC can remain (on) to control drive limit.
Joe mettle sends: