Date   
New Member

 

I'm new to the group. I enjoy all digital modes, spend a lot of time on PSK-31. Look for me on the waterfall.
73,
KI4VMK


K3SIW , transmitting Opera Op32 on lowFER Band #opera

Graham
 

A first : K3SIW , transmitting  Opera  Op32  on lowFER band  at  185.185 KHz 

[correction to original post  ,  Opera  reporting  136 Khz ] 

Ku4XR reporting  the  power level  to of been   1  watt  DC input and the  Ae , 15  meters of  wire .
modest by any standards , however, recording  at  best  of  -36 dB  s/n  
[ average over the  32 mins , in 2.4 KHz b/w] some  + 8/9  dB over the  system 
minimum , range  493 miles  over land. 

Opera , uses a  manchester coded , serial  data ,  on/off  keyed  , single  carrier  frequency , with  app  50% dutycycle
single pass ,  free  running, minimum  decode   s/n -40 dB ,  supplemented  by  an additional   - 5 dB s/n  correlation  detector . has proven 
particularly effective  in low signal  high noise  environments, found at MF and LF

73-Graham
G0NBD

 

Full listing from  data  base :-

08:59 136 K3SIW de KU4XR Op32 493 mi -36 dB F:3% in Friendsville, Tennessee - EM75xr 1504.8 Hz



2017-12-19 17:58:53 K3SIW EN52TA K3SIW EN52TA 0 136 -13 Op32_||||||||||||||||||||||||||||||||||||||||||||||||||_~13dB
2017-12-19 17:58:53 K3SIW EN52TA KB9PWQ EN52WA 21 136 -18 Op32_||||||||||||||||||||||||||||||||||||||||_~18dB
2017-12-19 17:58:47 K3SIW EN52TA NK9M EN51UQ 38 136 -24 Op32_||||||||||||||||||||||||||||_~24dB
2017-12-19 17:58:44 K3SIW EN52TA NK9M EN51UQ 38 136 -44 Op32__~44dB
2017-12-19 16:58:53 K3SIW EN52TA K3SIW EN52TA 0 136 -13 Op32_||||||||||||||||||||||||||||||||||||||||||||||||||_~13dB
2017-12-19 16:58:53 K3SIW EN52TA KB9PWQ EN52WA 21 136 -20 Op32_||||||||||||||||||||||||||||||||||||_~20dB
2017-12-19 15:58:53 K3SIW EN52TA K3SIW EN52TA 0 136 -13 Op32_||||||||||||||||||||||||||||||||||||||||||||||||||_~13dB
2017-12-19 15:58:47 K3SIW EN52TA NK9M EN51UQ 38 136 -26 Op32_||||||||||||||||||||||||_~26dB
2017-12-19 15:58:46 K3SIW EN52TA NK9M EN51UQ 38 136 -43 Op32__~43dB
2017-12-19 14:58:54 K3SIW EN52TA K3SIW EN52TA 0 136 -11 Op32_||||||||||||||||||||||||||||||||||||||||||||||||||||||_~11dB
2017-12-19 13:58:53 K3SIW EN52TA K3SIW EN52TA 0 136 -14 Op32_||||||||||||||||||||||||||||||||||||||||||||||||_~14dB
2017-12-19 13:58:47 K3SIW EN52TA NK9M EN51UQ 38 136 -25 Op32_||||||||||||||||||||||||||_~25dB
2017-12-19 12:58:47 K3SIW EN52TA NK9M EN51UQ 38 136 -25 Op32_||||||||||||||||||||||||||_~25dB
2017-12-19 11:58:46 K3SIW EN52TA NK9M EN51UQ 38 136 -43 Op32__~43dB
2017-12-19 10:59:08 K3SIW EN52TA KU4XR EM75XR 794 136 -45 Op32__~45dB
2017-12-19 09:59:05 K3SIW EN52TA KU4XR EM75XR 794 136 -38 Op32__~38dB
2017-12-19 08:59:06 K3SIW EN52TA KU4XR EM75XR 794 136 -36 Op32_||||_~36dB
2017-12-19 08:58:48 K3SIW EN52TA NK9M EN51UQ 38 136 -25 Op32_||||||||||||||||||||||||||_~25dB
2017-12-19 08:58:45 K3SIW EN52TA NK9M EN51UQ 38 136 -44 Op32__~44dB
2017-12-19 07:59:06 K3SIW EN52TA KU4XR EM75XR 794 136 -37 Op32_||_~37dB
2017-12-19 07:58:47 K3SIW EN52TA NK9M EN51UQ 38 136 -24 Op32_||||||||||||||||||||||||||||_~24dB
2017-12-19 06:59:05 K3SIW EN52TA KU4XR EM75XR 794 136 -37 Op32_||_~37dB
2017-12-19 05:59:07 K3SIW EN52TA KU4XR EM75XR 794 136 -40 Op32__~40dB
2017-12-19 05:58:48 K3SIW EN52TA NK9M EN51UQ 38 136 -26 Op32_||||||||||||||||||||||||_~26dB
2017-12-19 05:58:46 K3SIW EN52TA NK9M EN51UQ 38 136 -43 Op32__~43dB
2017-12-19 04:59:07 K3SIW EN52TA KU4XR EM75XR 794 136 -44 Op32__~44dB
2017-12-19 04:58:46 K3SIW EN52TA NK9M EN51UQ 38 136 -44 Op32__~44dB
2017-12-19 03:58:46 K3SIW EN52TA NK9M EN51UQ 38 136 -44 Op32__~44dB
2017-12-19 02:59:06 K3SIW EN52TA KU4XR EM75XR 794 136 -36 Op32_||||_~36dB
2017-12-19 02:58:52 K3SIW EN52TA KB9PWQ EN52WA 21 136 -21 Op32_||||||||||||||||||||||||||||||||||_~21dB
2017-12-19 02:58:46 K3SIW EN52TA NK9M EN51UQ 38 136 -43 Op32__~43dB
2017-12-19 01:59:06 K3SIW EN52TA KU4XR EM75XR 794 136 -38 Op32__~38dB
2017-12-19 01:58:53 K3SIW EN52TA KB9PWQ EN52WA 21 136 -20 Op32_||||||||||||||||||||||||||||||||||||_~20dB
2017-12-19 01:58:47 K3SIW EN52TA NK9M EN51UQ 38 136 -25 Op32_||||||||||||||||||||||||||_~25dB
2017-12-19 00:58:53 K3SIW EN52TA KB9PWQ EN52WA 21 136 -26 Op32_||||||||||||||||||||||||_~26dB
2017-12-18 23:58:53 K3SIW EN52TA KB9PWQ EN52WA 21 136 -17 Op32_||||||||||||||||||||||||||||||||||||||||||_~17dB
2017-12-18 23:58:45 K3SIW EN52TA NK9M EN51UQ 38 136 -43 Op32__~43dB
2017-12-18 22:58:53 K3SIW EN52TA KB9PWQ EN52WA 21 136 -20 Op32_||||||||||||||||||||||||||||||||||||_~20dB
2017-12-18 21:58:54 K3SIW EN52TA KB9PWQ EN52WA 21 136 -19 Op32_||||||||||||||||||||||||||||||||||||||_~19dB


http://spots.microwavers.es/index.php

https://rosmodem.wordpress.com/

Re: For SDR1000 and Softrock/Ensemble users, Pi SDR IQ / IQ Plus interfaces

Christos SV1EIA
 

Hi,

Received the first review from a Pi SDR / SDR1000 user
-> https://groups.yahoo.com/neo/groups/powersdr-iq/conversations/messages/3355

73 and Marry Christmas to all!,

Christos SV1EIA
https://pi-sdr.com

Re: N2NXZ Opera QRP on 7038 #opera

Graham
 

Thanks Andy, 
Yes ,  the  'old' system is  still  working nicely , after the  eme event ,  
JR re-worked the  decoder , appears to of gained a  few db's !

KC4SIT , running  5  watts  , at  - 1 dB s/n  could of been 1 mW !

KC4SIT KP3FT 40m OPERA 1534 miles 22:01:19

One pass decoder , produced a  interesting  propagation  plot , with a   ~ 1000:1  
change  in  signal  level, data  over a  6  hour  period, each spot is  a  
unique single pass. 

Captured  from the  data  base ,  the  s/n 
bar graph , originally  appeared  on the  ros  psk-reporter spots , useful
for a  quick  glance .. this  may  be  sinusoidal after a day or so ?

73-G, 


Several African DX entities on 17m FT8 now

Andrew O'Brien
 

Several African countries being heard on 17M today via FT8 mode. 
Andy K3UK

Re: Digital in phone portion of band ?

Andrew O'Brien
 

Thanks Trevor, good idea.  However, the hams I am talking about have never done digital modes at all, so that might be too difficult a task to syart them with.  6 meters is an interesting idea, I will check to see if they are active on 6M.
Andy K3UK

On Sat, Dec 9, 2017 at 10:59 AM, AKA via Groups.Io <m5aka@...> wrote:
It would depend on what content was being transferred by the PSK emission, it's covered in
§ 97.305 Authorized emission types

While Text content (e.g. PSK31) can only be sent below 28.300 if you were sending an Image using PSK modulation then it would be permitted above 28.300.

73 Trevor M5AKA



On Saturday, 9 December 2017, 15:32, Andrew O'Brien <andrewobrie@...> wrote:


In has been decades since I reviewed actual regulations versus "tradition" for digital modes.  Is it forbidden for USA operators to use something like PSK in the phone portion of 10M? There is a group of local hams using a phone frequency that is suddenly getting interested in digital modes and i thought of op eating a beginners net there .  We could easily establish a frequency in the normal range for digital modes but the ability to both speak and transmit digital signals on same frequency would be useful. I am assuming the answer will be that we cannot do this in the USA. 
Andy K3UK





--
Andy

Re: Digital in phone portion of band ?

M5AKA
 

It would depend on what content was being transferred by the PSK emission, it's covered in
§ 97.305 Authorized emission types

While Text content (e.g. PSK31) can only be sent below 28.300 if you were sending an Image using PSK modulation then it would be permitted above 28.300.

73 Trevor M5AKA



On Saturday, 9 December 2017, 15:32, Andrew O'Brien <andrewobrie@...> wrote:


In has been decades since I reviewed actual regulations versus "tradition" for digital modes.  Is it forbidden for USA operators to use something like PSK in the phone portion of 10M? There is a group of local hams using a phone frequency that is suddenly getting interested in digital modes and i thought of op eating a beginners net there .  We could easily establish a frequency in the normal range for digital modes but the ability to both speak and transmit digital signals on same frequency would be useful. I am assuming the answer will be that we cannot do this in the USA. 
Andy K3UK


Re: Digital in phone portion of band ?

Joe K1YOW
 

Yes, digital only in the CW bands in the USA on HF.  However, you can only run digital modes in the SSB areas on 6M and 2M.  On 6M and 2M, the CW bands are for CW only.  So....you could do what you want on 6M and 2M.  Joe, K1YOW

 


From: main@digitalradio.groups.io [mailto:main@digitalradio.groups.io] On Behalf Of Andrew O'Brien
Sent: Saturday, December 09, 2017 10:33 AM
To: main@digitalradio.groups.io
Subject: [digitalradio] Digital in phone portion of band ?

 

In has been decades since I reviewed actual regulations versus "tradition" for digital modes.  Is it forbidden for USA operators to use something like PSK in the phone portion of 10M? There is a group of local hams using a phone frequency that is suddenly getting interested in digital modes and i thought of op eating a beginners net there .  We could easily establish a frequency in the normal range for digital modes but the ability to both speak and transmit digital signals on same frequency would be useful. I am assuming the answer will be that we cannot do this in the USA. 
Andy K3UK

Digital in phone portion of band ?

Andrew O'Brien
 

In has been decades since I reviewed actual regulations versus "tradition" for digital modes.  Is it forbidden for USA operators to use something like PSK in the phone portion of 10M? There is a group of local hams using a phone frequency that is suddenly getting interested in digital modes and i thought of op eating a beginners net there .  We could easily establish a frequency in the normal range for digital modes but the ability to both speak and transmit digital signals on same frequency would be useful. I am assuming the answer will be that we cannot do this in the USA. 
Andy K3UK

Re: N2NXZ Opera QRP on 7038 #opera

Andrew OBrien
 

This is pretty amazing
Andy K3UK

On Sat, Dec 9, 2017 at 10:10 AM, Graham <g0nbd@...> wrote:

Mid latitude  ionospheric  depression, would  appear to  be   established  
No path  showing from the  north to EU, even with  power increase to  5  watts
 but  more southern , multiple spots  from KP3FT <>EU  or  UK 

73 -G,


KP3FT RX3DHR 40m OPERA 5798 miles 02:04:09
KP3FT RW3ADB 40m OPERA 5725 miles 02:35:21
KP3FT R3LW 40m OPERA 5506 miles 04:40:12
KP3FT IZ5CND 40m OPERA 4725 miles 07:15:49
KP3FT NL8992 40m OPERA 4530 miles 06:34:21
KP3FT G4MDH 40m OPERA 4171 miles 21:44:09
KP3FT EB5BQC 40m OPERA 4159 miles 01:01:40


Re: N2NXZ Opera QRP on 7038 #opera

Graham
 
Edited

One  spot  from A14HH  on 14 MHz  

2017-12-02 19:29:26 N2NXZ AA AI4HH EM92MH 0 14.062 -28 Op2__~28dB

Mid latitude  ionospheric  depression, would  appear to  be   established  
No path  showing from the  north to EU, even with  power increase to  5  watts
 but  more southern , multiple spots  from KP3FT <>EU  or  UK 

73 -G,


KP3FT RX3DHR 40m OPERA 5798 miles 02:04:09
KP3FT RW3ADB 40m OPERA 5725 miles 02:35:21
KP3FT R3LW 40m OPERA 5506 miles 04:40:12
KP3FT IZ5CND 40m OPERA 4725 miles 07:15:49
KP3FT NL8992 40m OPERA 4530 miles 06:34:21
KP3FT G4MDH 40m OPERA 4171 miles 21:44:09
KP3FT EB5BQC 40m OPERA 4159 miles 01:01:40

Re: For SDR1000 and Softrock/Ensemble users, Pi SDR IQ / IQ Plus interfaces

Christos SV1EIA
 

Hi,

For users who want this Christmas to revitalize their SDR1000, please let me remind you the Pi SDR IQ Plus for SDR1000 solution
You can Update your rig to a state of the art SDR transceiver at the fraction of the cost of a new one and put new life back into your existing SDR1000

What Pi SDR for SDR1000 gives you
1. It gets you Win 10/8/7 Ready – works on any OS, 64 or 32 bit
2. You can utilize even your new Laptop that lacks LPT !
3. There are No Parallel or USB port or Audio drivers – just a plug and play Ethernet port to connect to the PC for audio and cat control.
4. State of the art 192Khz panadapter bandwidth and 123db of dynamic range with AK5394A.
5. Updated PowerSDR software from 1.x to 2.5.3 included.

You can visit   https://pi-sdr.com   for more information.

Best wishes and Marry Christmas to all!

73,
Christos SV1EIA

k3ukpage

main@digitalradio.groups.io Integration <main@...>
 

By digitalradio

This message is a notification to let you know that a file has been uploaded to the Files area of the users@ardop.groups.io group.

File: ARDOP_Chat 1.0.2 Full Install.zip

Description:
ARDOP_Chat with ARDOP_Win TNC Revsions 1.0.2, 1.0.2.5 Nov 27, 2017. This includes new ARDOP_Win to ARDOP_Chat TCPIP interface and new frame types.

You can access this file via

main@ardop.groups.io
Subscribe: main+subscribe@ardop.groups.io
https://ardop.groups.io/g/users/files/ARDOP_Chat%201.0.2%20Full%20Install.zip

N2NXZ Opera QRP on 7038 #opera

Graham
 
Edited

N2NXZ is  running  Opera  on  7038   [  dial  usb ] coded opera  frequency , using 
U3  Beacon  kit  at  100 mW   carrier power ,  [ corrected  to  50 mW average ] 
Being  reliably  spotted by KP3FT ! not reached EU  yet.. 

Beacon is running  at  100 % no  timer ,  local  copy  showing 

23:28   7038 N2NXZ de SWLNXZ Op2 -5 dB F:0% in Hilton,NY 1559.6 Hz
23:26   7038 N2NXZ de SWLNXZ Op2 -4 dB F:0% in Hilton,NY 1559.6 Hz
23:24   7038 N2NXZ de SWLNXZ Op2 -5 dB F:2% in Hilton,NY 1559.6 Hz

Good chance to catch a  genuine 50 mW station on 7 
Any  takers  from  his side of the  pond  ?

73-Graham
G0NBD


N2NXZ KP3FT 40m OPERA 1865 miles 22:10:44

2017-12-04 22:10:43 N2NXZ AA KP3FT FK68QA 0 7.038 -26 Op2__~26dB
2017-12-04 11:27:01 N2NXZ AA KP3FT FK68QA 0 7.038 -27 Op2__~27dB
2017-12-04 11:24:58 N2NXZ AA KP3FT FK68QA 0 7.038 -27 Op2__~27dB
2017-12-04 10:50:17 N2NXZ AA KP3FT FK68QA 0 7.038 -23 Op2_||||||_~23dB
2017-12-04 10:48:15 N2NXZ AA KP3FT FK68QA 0 7.038 -28 Op2__~28dB
2017-12-04 10:44:10 N2NXZ AA KP3FT FK68QA 0 7.038 -26 Op2__~26dB
2017-12-04 10:40:06 N2NXZ AA KP3FT FK68QA 0 7.038 -25 Op2_||_~25dB
2017-12-03 11:08:53 N2NXZ AA KP3FT FK68QA 0 7.038 -27 Op2__~27dB
2017-12-03 11:04:48 N2NXZ AA KP3FT FK68QA 0 7.038 -26 Op2__~26dB
2017-12-03 11:02:46 N2NXZ AA KP3FT FK68QA 0 7.038 -26 Op2__~26dB
2017-12-03 11:00:44 N2NXZ AA KP3FT FK68QA 0 7.038 -26 Op2__~26dB
2017-12-03 10:58:41 N2NXZ AA KP3FT FK68QA 0 7.038 -26 Op2__~26dB
2017-12-03 10:56:39 N2NXZ AA KP3FT FK68QA 0 7.038 -24 Op2_||||_~24dB
2017-12-03 10:54:37 N2NXZ AA KP3FT FK68QA 0 7.038 -23 Op2_||||||_~23dB

ARIM Messaging Program v1.0

Bob NW8L
 

Hello,
 
ARIM v1.0 is available for download:
 
https://www.whitemesa.net/arim/arim.html#inst
 
- This version of ARIM adapts to the TNC Host Interface changes
  introduced in the recently released ARDOP TNC version 1.0.2. It is
  NOT compatible with earlier versions of the ARDOP TNC.
- NOTE: if upgrading from ARDOP TNC version 0.9.5, check your
  arim.ini file! Make sure that 'fecmode' parameters in the
  [tnc] sections don't reference one of the modes that were deleted
  in TNC version 1.0.2. See the change notes below.
 
Details in change log excerpt below. Special thanks to Doug WB6VAC
for help in beta testing.
 
Files are also available at the ardop applications Files area at
groups.io:
 
https://ardop.groups.io/g/applications/files
 
and in the Files area at the arim-ham Yahoo group:
 
https://groups.yahoo.com/neo/groups/arim-ham/files
 
Station NW8L will be on dial 14.066 in daytime, 7.101 at night and
sometimes 10.131 for a while in-between, for testing.
 
73, Bob NW8L
 
 
v1.0  02Dec2017
---------------
1. Adapt to new ARDOP TNC Host Interface Specification effective
   with ARDOP_Win and ardopc version 1.0.2. These are breaking
   changes, ARIM version 1.0 is NOT backward compatible with
   earlier versions of the ARDOP TNC. TNC version 1.0.2 is NOT
   interoperable with previous TNC versions.
2. Adjust menu of FEC modes to conform to changes made in ARDOP
   TNC v1.0.2. These modes were dropped:
      8FSK.200.25, 4FSK.200.50, 16FSK.500.25S, 16FSK.500.25,
      4FSK.1000.100, 4PSK.1000.167, 8PSK.1000.167, 4FSK.2000.100,
      4PSK.2000.167 and 8PSK.2000.167.
   These modes were added:
      16QAM.1000.100 and 16QAM.2000.100.
   NOTE: if upgrading from ARDOP TNC version 0.9.5, check your
   arim.ini file! Make sure that 'fecmode' parameters in the
   [tnc] sections don't reference one of the deleted modes
   listed above.
3. Improve contrast of PING and ID ARDOP frame traces printed
   to the Traffic Monitor and Calls Heard views.
4. Update embedded Help and PDF Help file.

Re: Calculating FCC required 60M center frequency for digital modes ?

Tony
 

Andy / Joseph:

It can be tricky when one digital mode program places the low tones on the waterfall frequency you click on while another centers the mode on the waterfall frequency.

However, since most (if not all) digital mode programs have waterfall markers that indicate a modes width, it's easy to visually set the center frequency of any mode using the marker. For 60 meters, one simply centers the middle of the bandwidth marker on 1500 Hz.

A CF table would be useful, but this method should be close enough for practical purposes, especially when you consider the number of older rigs out there that are probably misaligned by 50 Hz or more : )

Tony -K2MO

Re: Calculating FCC required 60M center frequency for digital modes ?

Andrew O'Brien
 

Thanks Joseph for making this issue less complex for my aging brain. I use Multipsk, Winwarbler, Fldigi, ARDOP, PC-ALE, and WSJT-X  but at least I now I am safe with Fldigi and can calculate with WSJT-X now.

Andy K3UK

On Thu, Nov 30, 2017 at 8:58 AM, w6jhp <falcongsr@...> wrote:
Andrew,

I think it's tricky because the different software packages implement the frequency selection differently in their waterfall displays. For fldigi you always click on +1500Hz regardless of mode as it centers it for you. 

If you used a different software package and it uses the leftmost edge of the signal as the frequency, then you have to do the math like you're seeing. For Olivia 8/500 you'd subtract 250Hz so you'd be at +1250Hz.

For PSK31 which is a single carrier, you'd put it right on +1500Hz no matter which software.

Now WSJT-X uses the leftmost edge of the signal as the frequency. For FSK modes like this the offset is the signal bandwidth divided by 2. So the wider the bandwidth of the mode, the more you subtract from 1500. So you'd use the offsets you quoted. FT8 is 50Hz wide so you'd set your TX frequency to +1475Hz.

It is a good question. These are the only two software packages I use so I don't know how helpful this is, but it is good to get it written down!

73,
Joseph W6JHP



On Thu, Nov 30, 2017 at 4:55 AM, Andrew O'Brien <andrewobrie@...> wrote:
Thanks Tony, I am aware of the ARRL chart you reference but I am talking about calculating things for each diditall mode since I am told it is not sufficient to turn to the allocated channel and just place a waterfall at 1500 Hz.  As in these two examples..

"JT65A is 174.9 Hz wide with the SYNC frequency on the LF edge. If you set WSJT-X to transmit with an offset of 1411 Hz, the center of your transmission will be 1411+(175/2) = 1500.5 Hz which is pretty much where you need to be".

"The bandwidth on JT9 is 15.6 Hz. For your transmission to comply with part 97.303h, you need to set your TX frequency on WSJT-X to 1500-(15.6/2) = 1492 Hz when using the JT9 mode" 



Andy K3UK


On Wed, Nov 29, 2017 at 10:23 PM, Anthony Bombardiere <DXDX@...> wrote:
Andy:

Suppressed carrier frequencies +1500 Hz will give you the center frequency. For example, tuning the VFO to the allocated suppressed carrier frequency (dial frequency) and then clicking 1500 Hz on your digital mode software will put your signal on the center frequency. 

Some of the older digital mode programs like IZ8BLY’s MT63 Terminal have fixed tone frequencies so you would need to adjust your dial frequency to compensate for the off-set.


Table 1 contains the current list of suppressed carrier / dial frequencies.

Tony -K2MO


On Nov 29, 2017, at 9:05 PM, Andrew O'Brien <andrewobrie@...> wrote:

Can someone with a better brain than me calculate the required center frequencies for the various digital modes on 60M channels in the USA.  PSK31, FT8, JT65A, JT9, Olivia 8/500 and more ?  It would be sueful to create a chart. 

Andy K3UK




--
Andy





--
Andy

Re: Calculating FCC required 60M center frequency for digital modes ?

w6jhp
 

Andrew,

I think it's tricky because the different software packages implement the frequency selection differently in their waterfall displays. For fldigi you always click on +1500Hz regardless of mode as it centers it for you. 

If you used a different software package and it uses the leftmost edge of the signal as the frequency, then you have to do the math like you're seeing. For Olivia 8/500 you'd subtract 250Hz so you'd be at +1250Hz.

For PSK31 which is a single carrier, you'd put it right on +1500Hz no matter which software.

Now WSJT-X uses the leftmost edge of the signal as the frequency. For FSK modes like this the offset is the signal bandwidth divided by 2. So the wider the bandwidth of the mode, the more you subtract from 1500. So you'd use the offsets you quoted. FT8 is 50Hz wide so you'd set your TX frequency to +1475Hz.

It is a good question. These are the only two software packages I use so I don't know how helpful this is, but it is good to get it written down!

73,
Joseph W6JHP



On Thu, Nov 30, 2017 at 4:55 AM, Andrew O'Brien <andrewobrie@...> wrote:
Thanks Tony, I am aware of the ARRL chart you reference but I am talking about calculating things for each diditall mode since I am told it is not sufficient to turn to the allocated channel and just place a waterfall at 1500 Hz.  As in these two examples..

"JT65A is 174.9 Hz wide with the SYNC frequency on the LF edge. If you set WSJT-X to transmit with an offset of 1411 Hz, the center of your transmission will be 1411+(175/2) = 1500.5 Hz which is pretty much where you need to be".

"The bandwidth on JT9 is 15.6 Hz. For your transmission to comply with part 97.303h, you need to set your TX frequency on WSJT-X to 1500-(15.6/2) = 1492 Hz when using the JT9 mode" 



Andy K3UK


On Wed, Nov 29, 2017 at 10:23 PM, Anthony Bombardiere <DXDX@...> wrote:
Andy:

Suppressed carrier frequencies +1500 Hz will give you the center frequency. For example, tuning the VFO to the allocated suppressed carrier frequency (dial frequency) and then clicking 1500 Hz on your digital mode software will put your signal on the center frequency. 

Some of the older digital mode programs like IZ8BLY’s MT63 Terminal have fixed tone frequencies so you would need to adjust your dial frequency to compensate for the off-set.


Table 1 contains the current list of suppressed carrier / dial frequencies.

Tony -K2MO


On Nov 29, 2017, at 9:05 PM, Andrew O'Brien <andrewobrie@...> wrote:

Can someone with a better brain than me calculate the required center frequencies for the various digital modes on 60M channels in the USA.  PSK31, FT8, JT65A, JT9, Olivia 8/500 and more ?  It would be sueful to create a chart. 

Andy K3UK




--
Andy


Re: Calculating FCC required 60M center frequency for digital modes ?

Andrew O'Brien
 

Thanks Tony, I am aware of the ARRL chart you reference but I am talking about calculating things for each diditall mode since I am told it is not sufficient to turn to the allocated channel and just place a waterfall at 1500 Hz.  As in these two examples..

"JT65A is 174.9 Hz wide with the SYNC frequency on the LF edge. If you set WSJT-X to transmit with an offset of 1411 Hz, the center of your transmission will be 1411+(175/2) = 1500.5 Hz which is pretty much where you need to be".

"The bandwidth on JT9 is 15.6 Hz. For your transmission to comply with part 97.303h, you need to set your TX frequency on WSJT-X to 1500-(15.6/2) = 1492 Hz when using the JT9 mode" 



Andy K3UK


On Wed, Nov 29, 2017 at 10:23 PM, Anthony Bombardiere <DXDX@...> wrote:
Andy:

Suppressed carrier frequencies +1500 Hz will give you the center frequency. For example, tuning the VFO to the allocated suppressed carrier frequency (dial frequency) and then clicking 1500 Hz on your digital mode software will put your signal on the center frequency. 

Some of the older digital mode programs like IZ8BLY’s MT63 Terminal have fixed tone frequencies so you would need to adjust your dial frequency to compensate for the off-set.


Table 1 contains the current list of suppressed carrier / dial frequencies.

Tony -K2MO


On Nov 29, 2017, at 9:05 PM, Andrew O'Brien <andrewobrie@...> wrote:

Can someone with a better brain than me calculate the required center frequencies for the various digital modes on 60M channels in the USA.  PSK31, FT8, JT65A, JT9, Olivia 8/500 and more ?  It would be sueful to create a chart. 

Andy K3UK




--
Andy

Re: Calculating FCC required 60M center frequency for digital modes ?

Tony
 

Andy:

Suppressed carrier frequencies +1500 Hz will give you the center frequency. For example, tuning the VFO to the allocated suppressed carrier frequency (dial frequency) and then clicking 1500 Hz on your digital mode software will put your signal on the center frequency. 

Some of the older digital mode programs like IZ8BLY’s MT63 Terminal have fixed tone frequencies so you would need to adjust your dial frequency to compensate for the off-set.


Table 1 contains the current list of suppressed carrier / dial frequencies.

Tony -K2MO


On Nov 29, 2017, at 9:05 PM, Andrew O'Brien <andrewobrie@...> wrote:

Can someone with a better brain than me calculate the required center frequencies for the various digital modes on 60M channels in the USA.  PSK31, FT8, JT65A, JT9, Olivia 8/500 and more ?  It would be sueful to create a chart. 

Andy K3UK