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Re: Dual VFO tracking - Split
Once upon a time I was using the MS-DOS-based FODTrack when
operating through satellites.? When faced with an in-band satellite
(MIR / ISS Packet, for example), it would put the radio into FM
Repeater mode aimed at the Doppler-corrected downlink frequency,
with an offset that was adjusted in real time to cause a transmit to
land on the doppler-corrected uplink frequency.? I'm not sure what
"modern" tracking software is able to do this, but it certainly
worked back then.
Greg? KO6TH
Spence M0STO via groups.io wrote:
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?
Dear group,
? ? ? ? ? ? ? ? ? ? ?Perhaps if I explain a little
background and what I’ve tried it may help to prevent things
I’ve done being repeated.
GreenCube is my problem! Working GreenCube is a nightmare
because of one reason, it’s a satellite and it’s also a
digipeater.
? Every program I’ve tried will happily tune the main VFO
but will not change the sub VFO. PSTrotator, HRD etc. OmniRig
does not seem to like to change the sub VFO while it’s tuning
the main VFO.?
? The FT847 has a major drawback though. In satellite mode
split mode this is achieved easily because the bands are V/U
or U/V uplink and downlink and full duplex but GreenCube sits
on the same frequency (bar Doppler correction). So the radio
will “error” when trying to TX on the same band, that’s common
knowledge.?
? The issue is when in split mode (the only real way to
work GreenCube and Doppler shift), as above, all software
shows the VFO change in software but not on the radio. I’ve
had extensive conversations with Codrut (PSTrotator) and after
many adjustments to his software he can’t manage to get the
sub VFO to alter with the main VFO. The nearest I’ve been to
achieving this was in HRD and setting the Uplink and Downlink
manually but as above only the “main” downlink VFO would
alter.
? I know that some versions of the FT847 had some issues
with asynchronous communications but this wouldn’t affect the
communication when altering the frequency.?
? I plan to inspect the bit data and see if sub-VFO
commands are actually being sent. I’ve successfully sent
manual commands to turn on sat mode, LSB/USB mode, enter
frequencies etc.?
? I wonder if anyone has any thoughts on this?
|
Please see the list of CAT commands but none mention
Split?! And there isn’t a provision for altering the sub-VFO
in the command structure that I can see!.
? Is it actually possible? Even repeater mode would’t work
as it would have a constant frequency indifference and not
change with Doppler bringing uplink and down link together at
90degrees (straight above would probably have 0 Doppler
shift).
?Any thoughts appreciated,
De Spence M0STO?
Sent while portable! please excuse typos.
Dual VFO tracking - Split
? Dear group, ? ? ? ? ? ? ? ? ? ? ?Perhaps if I explain a little background and what I’ve tried it may help to prevent things I’ve done being repeated.
GreenCube is my problem! Working GreenCube is a nightmare because of one reason, it’s a satellite and it’s also a digipeater.
? Every program I’ve tried will happily tune the main VFO but will not change the sub VFO. PSTrotator, HRD etc. OmniRig does not seem to like to change the sub VFO while it’s tuning the main VFO.?
? The FT847 has a major drawback though. In satellite mode split mode this is achieved easily because the bands are V/U or U/V uplink and downlink and full duplex but GreenCube sits on the same frequency (bar Doppler correction). So the radio will “error” when trying to TX on the same band, that’s common knowledge.?
? The issue is when in split mode (the only real way to work GreenCube and Doppler shift), as above, all software shows the VFO change in software but not on the radio. I’ve had extensive conversations with Codrut (PSTrotator) and after many adjustments to his software he can’t manage to get the sub VFO to alter with the main VFO. The nearest I’ve been to achieving this was in HRD and setting the Uplink and Downlink manually but as above only the “main” downlink VFO would alter.
? I know that some versions of the FT847 had some issues with asynchronous communications but this wouldn’t affect the communication when altering the frequency.?
? I plan to inspect the bit data and see if sub-VFO commands are actually being sent. I’ve successfully sent manual commands to turn on sat mode, LSB/USB mode, enter frequencies etc.?
? I wonder if anyone has any thoughts on this?
|
Please see the list of CAT commands but none mention Split?! And there isn’t a provision for altering the sub-VFO in the command structure that I can see!.
? Is it actually possible? Even repeater mode would’t work as it would have a constant frequency indifference and not change with Doppler bringing uplink and down link together at 90degrees (straight above would probably have 0 Doppler shift).
?Any thoughts appreciated,
De Spence M0STO?
Sent while portable! please excuse typos.
Re: Repaired serial port on my FT-847
I considered that, but I didn't want to do more surgery than required.
|
Re: Repaired serial port on my FT-847
if i was to be digging in one of mine it would be getting a upgrade 
|
Can anyone tell me what the difference(s) is/are for the FC10 and FC20?? I have an FT840 and recently bought a FC20 tuner but the FT840 says to use the FC10 tuner.? I am hoping the FC20 will work instead so I need to know what the differences are.? Hopefully they use the same protocol and commands.? Does anyone know if the FC20 will work on the FT840 without any mods?
Thank you.
Jim Pruitt
WA7DUY
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Re: Repaired serial port on my FT-847
Well done very impressive job
Sent from Jeff M0UHF?
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On 15 Sep 2023, at 15:46, Zach Metzinger, N0ZGO <zmetzing@...> wrote:
?Full story and pictures here:
--- Zach
N0ZGO
|
Repaired serial port on my FT-847
Full story and pictures here:
--- Zach
N0ZGO
|
Hi Jaimie,
I think the next stage is contact me directly not go through the group, when your issue is fixed, I will give a summary to the group.
The Tiny Spectrum analyser is a marvel, 10 years ago a 4.5 GHz analyser would be in the region of ?20,000!
The Tiny SP also has a signal generator mode so you can apply 14 MHz at 50uV (-73dBm) this should give you S9 with preamp off, if not then we need to setup and fault find.
73
Andrew
Get
On 2 Sept 2023, at 20:54, Jaime Eloy < cu3ak@...> wrote:
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I'm a rocky? here. I will get this in a week or so...
This will work as the signal generator for what we need ?
Only with a signal generator I will be able to sort this issue ?
----- Mensagem de Andrew Lenton < a@...> --------- Data: Sat, 2 Sep 2023 16:37:01 +0100
De: Andrew Lenton < a@...> Assunto: Re: [YaesuFT847] No S meter reading
Right OK,
?
Do you have a signal generator?
?
?
The issue is low signal on the s meter as shown on the previous pics. The last pic is only to show that all the numbers of the s meter are ok.
----- Mensagem de Andrew Lenton <a@...> ---------
Data: Sat, 2 Sep 2023 15:56:59 +0100
De: Andrew Lenton <a@...>
Assunto: Re: [YaesuFT847] No S meter reading
Ok let’s start from the beginning:
?
What is the issue, The AF is the audio to the speaker, do you mean RF as your AF in down
?
?
With the AF at maximum I have all the readings. So the display is ok.
----- Mensagem de Andrew Lenton <a@...> ---------
Data: Sat, 2 Sep 2023 14:37:21 +0100
De: Andrew Lenton <a@...>
Assunto: Re: [YaesuFT847] No S meter reading
Hi Check the contrast level on your radio it needs turning up, the whole display is opaque
?
KR
?
Andrew
?
From: [email protected] [mailto:[email protected]] On Behalf Of Jaime Eloy
Sent: 02 September 2023 14:18
To: [email protected]
Subject: Re: [YaesuFT847] No S meter reading
?
Forgot to add, sorry. Now the pics are attached.
----- Fim da mensagem de Andrew Lenton <a@...> -----
----- Fim da mensagem de Andrew Lenton <a@...> -----
----- Fim da mensagem de Andrew Lenton < a@...> -----
|
Try this:
The scope is fine, but not what you need,
The SA is also a SIgnal Generator and there is a larger version with a 4 inch screen
73
Andrew
Get
On 2 Sept 2023, at 20:54, Jaime Eloy < cu3ak@...> wrote:
toggle quoted message
Show quoted text
I'm a rocky? here. I will get this in a week or so...
This will work as the signal generator for what we need ?
Only with a signal generator I will be able to sort this issue ?
----- Mensagem de Andrew Lenton < a@...> --------- Data: Sat, 2 Sep 2023 16:37:01 +0100
De: Andrew Lenton < a@...> Assunto: Re: [YaesuFT847] No S meter reading
Right OK,
?
Do you have a signal generator?
?
?
The issue is low signal on the s meter as shown on the previous pics. The last pic is only to show that all the numbers of the s meter are ok.
----- Mensagem de Andrew Lenton <a@...> ---------
Data: Sat, 2 Sep 2023 15:56:59 +0100
De: Andrew Lenton <a@...>
Assunto: Re: [YaesuFT847] No S meter reading
Ok let’s start from the beginning:
?
What is the issue, The AF is the audio to the speaker, do you mean RF as your AF in down
?
?
With the AF at maximum I have all the readings. So the display is ok.
----- Mensagem de Andrew Lenton <a@...> ---------
Data: Sat, 2 Sep 2023 14:37:21 +0100
De: Andrew Lenton <a@...>
Assunto: Re: [YaesuFT847] No S meter reading
Hi Check the contrast level on your radio it needs turning up, the whole display is opaque
?
KR
?
Andrew
?
From: [email protected] [mailto:[email protected]] On Behalf Of Jaime Eloy
Sent: 02 September 2023 14:18
To: [email protected]
Subject: Re: [YaesuFT847] No S meter reading
?
Forgot to add, sorry. Now the pics are attached.
----- Fim da mensagem de Andrew Lenton <a@...> -----
----- Fim da mensagem de Andrew Lenton <a@...> -----
----- Fim da mensagem de Andrew Lenton < a@...> -----
|
I'm a rocky? here. I will get this in a week or so...
This will work as the signal generator for what we need ?
Only with a signal generator I will be able to sort this issue ?
----- Mensagem de Andrew Lenton < a@...> --------- Data: Sat, 2 Sep 2023 16:37:01 +0100
De: Andrew Lenton < a@...> Assunto: Re: [YaesuFT847] No S meter reading
Right OK,
?
Do you have a signal generator?
?
?
The issue is low signal on the s meter as shown on the previous pics. The last pic is only to show that all the numbers of the s meter are ok.
----- Mensagem de Andrew Lenton <a@...> ---------
Data: Sat, 2 Sep 2023 15:56:59 +0100
De: Andrew Lenton <a@...>
Assunto: Re: [YaesuFT847] No S meter reading
Ok let’s start from the beginning:
?
What is the issue, The AF is the audio to the speaker, do you mean RF as your AF in down
?
?
With the AF at maximum I have all the readings. So the display is ok.
----- Mensagem de Andrew Lenton <a@...> ---------
Data: Sat, 2 Sep 2023 14:37:21 +0100
De: Andrew Lenton <a@...>
Assunto: Re: [YaesuFT847] No S meter reading
Hi Check the contrast level on your radio it needs turning up, the whole display is opaque
?
KR
?
Andrew
?
From: [email protected] [mailto:[email protected]] On Behalf Of Jaime Eloy
Sent: 02 September 2023 14:18
To: [email protected]
Subject: Re: [YaesuFT847] No S meter reading
?
Forgot to add, sorry. Now the pics are attached.
----- Fim da mensagem de Andrew Lenton <a@...> -----
----- Fim da mensagem de Andrew Lenton <a@...> -----
----- Fim da mensagem de Andrew Lenton < a@...> -----
|
From: [email protected] [mailto:[email protected]] On Behalf Of Jaime Eloy
Sent: 02 September 2023 16:20
To: [email protected]
Subject: Re: [YaesuFT847] No S meter reading? The issue is low signal on the s meter as shown on the previous pics. The last pic is only to show that all the numbers of the s meter are ok. ----- Mensagem de Andrew Lenton <a@...> --------- Data: Sat, 2 Sep 2023 15:56:59 +0100 De: Andrew Lenton <a@...> Assunto: Re: [YaesuFT847] No S meter reading Ok let’s start from the beginning: ? What is the issue, The AF is the audio to the speaker, do you mean RF as your AF in down ? ? With the AF at maximum I have all the readings. So the display is ok. ----- Mensagem de Andrew Lenton <a@...> --------- Data: Sat, 2 Sep 2023 14:37:21 +0100 De: Andrew Lenton <a@...> Assunto: Re: [YaesuFT847] No S meter reading Hi Check the contrast level on your radio it needs turning up, the whole display is opaque ? KR ? Andrew ? From: [email protected] [mailto:[email protected]] On Behalf Of Jaime Eloy
Sent: 02 September 2023 14:18
To: [email protected]
Subject: Re: [YaesuFT847] No S meter reading ? Forgot to add, sorry. Now the pics are attached.
----- Fim da mensagem de Andrew Lenton <a@...> -----
----- Fim da mensagem de Andrew Lenton <a@...> -----
|
Right OK, ? Do you have a signal generator? ?
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Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Jaime Eloy
Sent: 02 September 2023 16:20
To: [email protected]
Subject: Re: [YaesuFT847] No S meter reading? The issue is low signal on the s meter as shown on the previous pics. The last pic is only to show that all the numbers of the s meter are ok. ----- Mensagem de Andrew Lenton <a@...> --------- Data: Sat, 2 Sep 2023 15:56:59 +0100 De: Andrew Lenton <a@...> Assunto: Re: [YaesuFT847] No S meter reading Ok let’s start from the beginning: ? What is the issue, The AF is the audio to the speaker, do you mean RF as your AF in down ? ? With the AF at maximum I have all the readings. So the display is ok. ----- Mensagem de Andrew Lenton <a@...> --------- Data: Sat, 2 Sep 2023 14:37:21 +0100 De: Andrew Lenton <a@...> Assunto: Re: [YaesuFT847] No S meter reading Hi Check the contrast level on your radio it needs turning up, the whole display is opaque ? KR ? Andrew ? From: [email protected] [mailto:[email protected]] On Behalf Of Jaime Eloy
Sent: 02 September 2023 14:18
To: [email protected]
Subject: Re: [YaesuFT847] No S meter reading ? Forgot to add, sorry. Now the pics are attached.
----- Fim da mensagem de Andrew Lenton <a@...> -----
----- Fim da mensagem de Andrew Lenton <a@...> -----
|
The issue is low signal on the s meter as shown on the previous pics. The last pic is only to show that all the numbers of the s meter are ok.
----- Mensagem de Andrew Lenton < a@...> --------- Data: Sat, 2 Sep 2023 15:56:59 +0100
De: Andrew Lenton < a@...> Assunto: Re: [YaesuFT847] No S meter reading
Ok let’s start from the beginning:
?
What is the issue, The AF is the audio to the speaker, do you mean RF as your AF in down
?
?
With the AF at maximum I have all the readings. So the display is ok.
----- Mensagem de Andrew Lenton <a@...> ---------
Data: Sat, 2 Sep 2023 14:37:21 +0100
De: Andrew Lenton <a@...>
Assunto: Re: [YaesuFT847] No S meter reading
Hi Check the contrast level on your radio it needs turning up, the whole display is opaque
?
KR
?
Andrew
?
From: [email protected] [mailto:[email protected]] On Behalf Of Jaime Eloy
Sent: 02 September 2023 14:18
To: [email protected]
Subject: Re: [YaesuFT847] No S meter reading
?
Forgot to add, sorry. Now the pics are attached.
----- Fim da mensagem de Andrew Lenton <a@...> -----
----- Fim da mensagem de Andrew Lenton < a@...> -----
|
Ok let’s start from the beginning: ? What is the issue, The AF is the audio to the speaker, do you mean RF as your AF in down ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Jaime Eloy
Sent: 02 September 2023 15:46
To: [email protected]
Subject: Re: [YaesuFT847] No S meter reading? With the AF at maximum I have all the readings. So the display is ok. ----- Mensagem de Andrew Lenton <a@...> --------- Data: Sat, 2 Sep 2023 14:37:21 +0100 De: Andrew Lenton <a@...> Assunto: Re: [YaesuFT847] No S meter reading Hi Check the contrast level on your radio it needs turning up, the whole display is opaque ? KR ? Andrew ? From: [email protected] [mailto:[email protected]] On Behalf Of Jaime Eloy
Sent: 02 September 2023 14:18
To: [email protected]
Subject: Re: [YaesuFT847] No S meter reading ? Forgot to add, sorry. Now the pics are attached.
----- Fim da mensagem de Andrew Lenton <a@...> -----
|
OK there are two display settings, dimmer is the back light, but there is also a contrast setting, it may be in the setup menu ? KR ? Andrew ?
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Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Jaime Eloy
Sent: 02 September 2023 15:11
To: [email protected]
Subject: Re: [YaesuFT847] No S meter reading? Using the DIMMER on the highest at "0" I have the same. ----- Mensagem de Andrew Lenton <a@...> --------- Data: Sat, 2 Sep 2023 14:37:21 +0100 De: Andrew Lenton <a@...> Assunto: Re: [YaesuFT847] No S meter reading Hi Check the contrast level on your radio it needs turning up, the whole display is opaque ? KR ? Andrew ? From: [email protected] [mailto:[email protected]] On Behalf Of Jaime Eloy
Sent: 02 September 2023 14:18
To: [email protected]
Subject: Re: [YaesuFT847] No S meter reading ? Forgot to add, sorry. Now the pics are attached.
----- Fim da mensagem de Andrew Lenton <a@...> -----
|
With the AF at maximum I have all the readings. So the display is ok.
----- Mensagem de Andrew Lenton < a@...> --------- Data: Sat, 2 Sep 2023 14:37:21 +0100
De: Andrew Lenton < a@...> Assunto: Re: [YaesuFT847] No S meter reading
Hi Check the contrast level on your radio it needs turning up, the whole display is opaque
?
KR
?
Andrew
?
From: [email protected] [mailto:[email protected]] On Behalf Of Jaime Eloy
Sent: 02 September 2023 14:18
To: [email protected]
Subject: Re: [YaesuFT847] No S meter reading
?
Forgot to add, sorry. Now the pics are attached.
----- Fim da mensagem de Andrew Lenton < a@...> -----
|
Using the DIMMER on the highest at "0" I have the same.
----- Mensagem de Andrew Lenton < a@...> --------- Data: Sat, 2 Sep 2023 14:37:21 +0100
De: Andrew Lenton < a@...> Assunto: Re: [YaesuFT847] No S meter reading
Hi Check the contrast level on your radio it needs turning up, the whole display is opaque
?
KR
?
Andrew
?
From: [email protected] [mailto:[email protected]] On Behalf Of Jaime Eloy
Sent: 02 September 2023 14:18
To: [email protected]
Subject: Re: [YaesuFT847] No S meter reading
?
Forgot to add, sorry. Now the pics are attached.
----- Fim da mensagem de Andrew Lenton < a@...> -----
|
|
|
Forgot to add, sorry. Now the pics are attached.
|
Re: DISC (Discriminator Centre Meter)
Hi you can I did this, I will look up and see what I can find ?
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Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Mark Bowersox
Sent: 02 September 2023 00:41
To: [email protected]
Subject: [YaesuFT847] DISC (Discriminator Center Meter) ? My DISC is way off center and has been since buying. How do you adjust this to get the display to read in the center? My transmissions are find and I used a frequency counter to check to see if I am off frequency. I was told a whole ago that you can access a special menu to make adjustments to bring the display back to center.?
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Spence G5STO
Jeff M0UHF
Andrew Lenton
