This weekend, the only
departure from our usual MFSK32 is one news item in MFSK31. Both MFSK31 and
MFSK32 have a symbol rate of 31.3 baud, but MFSK31 is only half the speed: 55
wpm. MFSK31 also has half the bandwidth, 330 Hz. Its modulation is 8-FSK,
meaning 8 tones, rather than the 16 tones of MFSK32. (This table of
modes may be helpful.) We’ll see if the performance of MFSK31 is better or
worse than that of MFSK32, especially if reception conditions are difficult.
(MFSK31 does not do images, hence the MFSK32 image following the MFSK news
During the past several weeks,
you have seen VOA RADIO GRAM transmitted as “video text” in the waterfall. To
see all three lines of the video text, make this adjustment in Fldigi: Configure
> Waterfall > FFT Processing > change Waterfall height in pixels to a
higher value – try 185 and adjust from there. And note that the change does not
take effect until Fldigi is started again.
Here is the lineup for VOA
Radiogram, program 149, 6-7 February
2016, all in MFSK32 except where noted:
1:34 Program preview
2:52 2018 NASA space launch
will carry 13 cubesats*
9:24 MFSK31: Russian
spacewalk (MFSK32 image)*
16:16 MFSK32: Afghan IS radio
22:34 Coming events* and
* with image
Due to last minute edits, the
times listed above may vary somewhat from the actual broadcast times.
VOA Radiogram transmission
schedule (all days and times
UTC): Sat 0930-1000 5865 kHz Sat 1600-1630 17580 kHz Sun 0230-0300 5745
kHz Sun 1930-2000 15670 kHz All via the Edward R. Murrow transmitting
station in North Carolina.
KBC will transmit a minute of MFSK32
Sunday at about 0225 UTC (Saturday 9:25 pm EST) on 6040 kHz, via Germany. Please
send reports for this KBC reception to Eric: firstname.lastname@example.org
A reminder that the TIVAR
app is available for decoding the modes on an Android device.
Thanks for the reception
reports sent for last weekend’s VOA Radiogram. I am now answering reports to
Program 145, then will start on an older program this