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How do I tell if the receive PE4302 attenuator is working.? I can't tell any difference in received signals at whatever settings or when I jumper it out.? I have two RF boards built up and they behave the same.? Before I swap the chips out, I wanted to get some inputs. I haven't gotten to testing the transmitter circuits yet.
dave, n3ds
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Here's one way to test it.
Load the latest code onto the Teensy. It has an option under the RF set menu to change the input attenuation.
Then, put a 10 MHz (or whatever) signal into the RF_in SMA connector and hook an oscilloscope or spectrum analyzer to the output side of the attenuator bypass jumper.
You should see the signal amplitude change when you adjust the RF input attention setting in the RF menu.
-------- Original Message -------- On 1/31/25 9:46 AM, D Solt via groups.io wrote: How do I tell if the receive PE4302 attenuator is working.? I can't tell any difference in received signals at whatever settings or when I jumper it out.? I have two RF boards built up and they behave the same.? Before I swap the chips out, I wanted to get some inputs. I haven't gotten to testing the transmitter circuits yet.
dave, n3ds
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Thanks Oliver. I¡¯ll try this dave
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On Jan 31, 2025, at 6:14?PM, Oliver KI3P via groups.io <oliver@...> wrote:
? Here's one way to test it.
Load the latest code onto the Teensy. It has an option under the RF set menu to change the input attenuation.
Then, put a 10 MHz (or whatever) signal into the RF_in SMA connector and hook an oscilloscope or spectrum analyzer to the output side of the attenuator bypass jumper.
You should see the signal amplitude change when you adjust the RF input attention setting in the RF menu.
-------- Original Message -------- On 1/31/25 9:46 AM, D Solt via groups.io wrote: How do I tell if the receive PE4302 attenuator is working.? I can't tell any difference in received signals at whatever settings or when I jumper it out.? I have two RF boards built up and they behave the same.? Before I swap the chips out, I wanted to get some inputs. I haven't gotten to testing the transmitter circuits yet.
dave, n3ds
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When I change the attenuator, I can see it clearly across the entire
spectrum display. Everything just moves down.
- Jerry, KF6VB
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On 2025-01-31 17:15, D Solt via groups.io wrote: Thanks Oliver. I¡¯ll try this
dave
On Jan 31, 2025, at 6:14?PM, Oliver KI3P via groups.io
<oliver@...> wrote: ?
Here's one way to test it.
Load the latest code onto the Teensy. It has an option under the RF
set menu to change the input attenuation.
Then, put a 10 MHz (or whatever) signal into the RF_in SMA connector
and hook an oscilloscope or spectrum analyzer to the output side of
the attenuator bypass jumper.
You should see the signal amplitude change when you adjust the RF
input attention setting in the RF menu.
-------- Original Message --------
On 1/31/25 9:46 AM, D Solt via groups.io wrote:
How do I tell if the receive PE4302 attenuator is working. I
can't tell any difference in received signals at whatever settings
or when I jumper it out. I have two RF boards built up and they
behave the same. Before I swap the chips out, I wanted to get
some inputs. I haven't gotten to testing the transmitter circuits
yet.
dave, n3ds Links:
------
[1] /g/SoftwareControlledHamRadio/message/32529
[2] /mt/110916510/243852
[3] /g/SoftwareControlledHamRadio/post
[4] /g/SoftwareControlledHamRadio/editsub/243852
[5]
/g/SoftwareControlledHamRadio/leave/10484476/243852/1943518115/xyzzy
|
Thanks Jerry.? I now have 3 boards built with the attenuator and the spectrum doesn't move up and down on any of them.? I'll try monitoring right at the attenuator with a sig gen input.? It is a difficult chip to install and I'm guessing I don't have it soldered on all pins.
dave, n3ds
When I change the attenuator, I can see it clearly across the entire
spectrum display.? Everything just moves down.
? ? ? ? ? ? ?- Jerry, KF6VB
On 2025-01-31 17:15, D Solt via wrote:
> Thanks Oliver. I¡¯ll try this
> dave
>
>> On Jan 31, 2025, at 6:14?PM, Oliver KI3P via
>> <oliver=[email protected]> wrote:
>
>> ?
>>
>> Here's one way to test it.
>>
>> Load the latest code onto the Teensy. It has an option under the RF
>> set menu to change the input attenuation.
>>
>> Then, put a 10 MHz (or whatever) signal into the RF_in SMA connector
>> and hook an oscilloscope or spectrum analyzer to the output side of
>> the attenuator bypass jumper.
>>
>> You should see the signal amplitude change when you adjust the RF
>> input attention setting in the RF menu.
>>
>> -------- Original Message --------
>> On 1/31/25 9:46 AM, D Solt via wrote:
>>
>>> How do I tell if the receive PE4302 attenuator is working.? I
>>> can't tell any difference in received signals at whatever settings
>>> or when I jumper it out.? I have two RF boards built up and they
>>> behave the same.? Before I swap the chips out, I wanted to get
>>> some inputs. I haven't gotten to testing the transmitter circuits
>>> yet.
>>> dave, n3ds
>
>
>
> Links:
> ------
> [1] /g/SoftwareControlledHamRadio/message/32529
> [2] /mt/110916510/243852
> [3] /g/SoftwareControlledHamRadio/post
> [4] /g/SoftwareControlledHamRadio/editsub/243852
> [5]
> /g/SoftwareControlledHamRadio/leave/10484476/243852/1943518115/xyzzy
|
On 2025-02-01 06:53, D Solt via groups.io wrote: Thanks Jerry. I now have 3 boards built with the attenuator and the
spectrum doesn't move up and down on any of them. I'll try monitoring
right at the attenuator with a sig gen input. It is a difficult chip
to install and I'm guessing I don't have it soldered on all pins. *** Yeah, I think I had to install two or three before it finally worked. Those chips - and the si5351a - really beg for pick-n-place. I think it worked after... ...I got some low temperature solder paste and diluted it with liquid flux. Put a tiny drop on each land under a microscope with a brand new Xacto knife tip. Soldered it on a little computerized hot plate. - Jerry, KF6VB
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The latest RF boards have holes in the back, behind the PE4302 chips for easier soldering the back pad. ?That said, ill look into having RF boards made with the PE4302¡¯s and the si5351 pre placed. ?I don't think that would cost much. ?
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com
email:??bill@... ?
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On Feb 1, 2025, at 9:35?AM, jerry-KF6VB <jerry@...> wrote:
? On 2025-02-01 06:53, D Solt via groups.io wrote:Thanks Jerry. ?I now have 3 boards built with the attenuator and the
spectrum doesn't move up and down on any of them. ?I'll try monitoring
right at the attenuator with a sig gen input. ?It is a difficult chip
to install and I'm guessing I don't have it soldered on all pins.
*** Yeah, I think I had to install two or three before it finally worked.Those chips - and the si5351a - really beg for pick-n-place.I think it worked after... ?...I got some low temperature solder paste and diluted it with liquid flux.Put a tiny drop on each land under a microscope with a brand new Xacto knife tip.Soldered it on a little computerized hot plate. ???????????????????- Jerry, KF6VB
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That would be awesome.? I have not built yet and that is those were my biggest worries!
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I wonder if my problem with the attenuator is related to software.? All 3 of my boards behave the same. They receive well, but the levels never change when I adjust the receive attenuator.? Maybe I have an earlier version of the software or the I2C addresses are not right.? My Bit Report shows: 0x21 Front Panel 0x24 BPF 0x27 FR MC23017 NOT FOUND 0x6F RF 0x25 LPF 0x29 LPT Does this look correct?? I'll download the latest version of the SW tomorrow.
dave
Here's one way to test it.
Load the latest code onto the Teensy. It has an option under the RF set menu to change the input attenuation.
Then, put a 10 MHz (or whatever) signal into the RF_in SMA connector and hook an oscilloscope or spectrum analyzer to the output side of the attenuator bypass jumper.
You should see the signal amplitude change when you adjust the RF input attention setting in the RF menu.
-------- Original Message -------- On 1/31/25 9:46 AM, D Solt via wrote: How do I tell if the receive PE4302 attenuator is working.? I can't tell any difference in received signals at whatever settings or when I jumper it out.? I have two RF boards built up and they behave the same.? Before I swap the chips out, I wanted to get some inputs. I haven't gotten to testing the transmitter circuits yet.
dave, n3ds
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On 2025-02-03 13:32, D Solt via groups.io wrote: I wonder if my problem with the attenuator is related to software. You can scope the control wires going to the attenuators. They're just DC levels. For the receive attenuator, the signals are U21 pin 21 ( .5dB ) through U21 pin 26. High = near 3.3V, Low = near 0V. - Jerry, KF6VB All 3 of my boards behave the same. They receive well, but the levels
never change when I adjust the receive attenuator. Maybe I have an
earlier version of the software or the I2C addresses are not right.
My Bit Report shows:
0x21 Front Panel
0x24 BPF
0x27 FR MC23017 NOT FOUND
0x6F RF
0x25 LPF
0x29 LPT
Does this look correct? I'll download the latest version of the SW
tomorrow.
dave
On Fri, Jan 31, 2025 at 6:14?PM Oliver KI3P via groups.io [1]
<oliver@...> wrote:
Here's one way to test it.
Load the latest code onto the Teensy. It has an option under the RF
set menu to change the input attenuation.
Then, put a 10 MHz (or whatever) signal into the RF_in SMA connector
and hook an oscilloscope or spectrum analyzer to the output side of
the attenuator bypass jumper.
You should see the signal amplitude change when you adjust the RF
input attention setting in the RF menu.
-------- Original Message --------
On 1/31/25 9:46 AM, D Solt via groups.io [1] wrote:
How do I tell if the receive PE4302 attenuator is working. I
can't tell any difference in received signals at whatever settings
or when I jumper it out. I have two RF boards built up and they
behave the same. Before I swap the chips out, I wanted to get
some inputs. I haven't gotten to testing the transmitter circuits
yet.
dave, n3ds Links:
------
[1]
[2] /g/SoftwareControlledHamRadio/message/32563
[3] /mt/110916510/243852
[4] /g/SoftwareControlledHamRadio/post
[5] /g/SoftwareControlledHamRadio/editsub/243852
[6]
/g/SoftwareControlledHamRadio/leave/10484476/243852/1943518115/xyzzy
|
No¡ looks like the control is not talking on the RF board.? ? Here is a list of the reserved addresses (NOTE DON¡¯T get hung up on 1st receiver or Second receiver¡ they could be either by changing some definitions in the software) : ? ??? <- open the I2C address assignments spreadsheet. ??Column ¡°G¡± ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ?
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From: [email protected] <[email protected]> On Behalf Of D Solt via groups.io
Sent: Monday, February 3, 2025 3:32 PM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] T41 receive attenuator working?? I wonder if my problem with the attenuator is related to software.? All 3 of my boards behave the same. They receive well, but the levels never change when I adjust the receive attenuator.? Maybe I have an earlier version of the software or the I2C addresses are not right.? My Bit Report shows: 0x27 FR MC23017 NOT FOUND Does this look correct?? I'll download the latest version of the SW tomorrow. ? Here's one way to test it. Load the latest code onto the Teensy. It has an option under the RF set menu to change the input attenuation. Then, put a 10 MHz (or whatever) signal into the RF_in SMA connector and hook an oscilloscope or spectrum analyzer to the output side of the attenuator bypass jumper. You should see the signal amplitude change when you adjust the RF input attention setting in the RF menu.
-------- Original Message --------
On 1/31/25 9:46 AM, D Solt via wrote:
How do I tell if the receive PE4302 attenuator is working.? I can't tell any difference in received signals at whatever settings or when I jumper it out.? I have two RF boards built up and they behave the same.? Before I swap the chips out, I wanted to get some inputs. I haven't gotten to testing the transmitter circuits yet.
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The control MC23017 is not recognized on the board so its not gonna work no matter what. ALSO MAKE SURE THAT THE .CPP and .H FILES FOR RF CONTROL ARE PRESENT IN THE FILE YOU ARE COMPILING. If they are not, there is no RF control software.
Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ
Owner - Operator
Big Signal Ranch ¨C K9ZC
Staunton, Illinois
Owner ¨C Operator
Villa Grand Piton ¨C J68HZ
Soufriere, St. Lucia W.I.
Rent it: www.VillaGrandPiton.com
Moderator: North American QRO Group at Groups.IO.
Moderator: Amateur Radio Builders Group at Groups.IO.
email: bill@...
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-----Original Message----- From: [email protected] < [email protected]> On Behalf Of jerry-KF6VB Sent: Monday, February 3, 2025 3:46 PM To: [email protected]Cc: D Solt via groups.io <davesolt@...> Subject: Re: [SoftwareControlledHamRadio] T41 receive attenuator working? On 2025-02-03 13:32, D Solt via groups.io wrote: I wonder if my problem with the attenuator is related to software. You can scope the control wires going to the attenuators. They're just DC levels. For the receive attenuator, the signals are U21 pin 21 ( .5dB ) through U21 pin 26. High = near 3.3V, Low = near 0V. - Jerry, KF6VB All 3 of my boards behave the same. They receive well, but the levels
never change when I adjust the receive attenuator. Maybe I have an
earlier version of the software or the I2C addresses are not right.
My Bit Report shows:
0x21 Front Panel
0x24 BPF
0x27 FR MC23017 NOT FOUND
0x6F RF
0x25 LPF
0x29 LPT
Does this look correct? I'll download the latest version of the SW
tomorrow.
dave
On Fri, Jan 31, 2025 at 6:14?PM Oliver KI3P via groups.io [1]
<oliver@...> wrote:
Here's one way to test it.
Load the latest code onto the Teensy. It has an option under the RF
set menu to change the input attenuation.
Then, put a 10 MHz (or whatever) signal into the RF_in SMA connector
and hook an oscilloscope or spectrum analyzer to the output side of
the attenuator bypass jumper.
You should see the signal amplitude change when you adjust the RF
input attention setting in the RF menu.
-------- Original Message --------
On 1/31/25 9:46 AM, D Solt via groups.io [1] wrote:
How do I tell if the receive PE4302 attenuator is working. I can't
tell any difference in received signals at whatever settings or when
I jumper it out. I have two RF boards built up and they behave the
same. Before I swap the chips out, I wanted to get some inputs. I
haven't gotten to testing the transmitter circuits yet.
dave, n3ds
Links:
------
[1]
[2] /g/SoftwareControlledHamRadio/message/32563
[3] /mt/110916510/243852
[4] /g/SoftwareControlledHamRadio/post
[5] /g/SoftwareControlledHamRadio/editsub/243852
[6]
/g/SoftwareControlledHamRadio/leave/10484476/243852/1
943518115/xyzzy
|
Bill's right: you do not have the correct address for the MCP23017 chip. The I2C address is set by JP15, JP16 and JP17.
?
?
The command "#define RF_MCP23017_ADDR" sets the address that the code looks for -- make sure the address in software matches the address you set using the solder jumpers.
|
The primary RF board (that is the Primary RX and TX) should be set to 0x27 which means that the three address lines A0, A1, and A2 should be set to ¡°111¡± or no shorted jumpers (J15, J16, J17). ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ?
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From: [email protected] <[email protected]> On Behalf Of Oliver KI3P via groups.io
Sent: Monday, February 3, 2025 4:49 PM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] T41 receive attenuator working?? Bill's right: you do not have the correct address for the MCP23017 chip. The I2C address is set by JP15, JP16 and JP17. The command "#define RF_MCP23017_ADDR" sets the address that the code looks for -- make sure the address in software matches the address you set using the solder jumpers.
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That was it!!!! Wrong address. Now all three boards work with varying receiver attenuation.? Now I'm on to calibration.? Thank you all for your help. dave, n3ds
The primary RF board (that is the Primary RX and TX) should be set to 0x27 which means that the three address lines A0, A1, and A2 should be set to ¡°111¡± or no shorted jumpers (J15, J16, J17). ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? ? Bill's right: you do not have the correct address for the MCP23017 chip. The I2C address is set by JP15, JP16 and JP17. The command "#define RF_MCP23017_ADDR" sets the address that the code looks for -- make sure the address in software matches the address you set using the solder jumpers.
|
You are quite welcome Dave¡ For feedback, which documentation is lacking to help avoid a problem here? ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ?
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From: [email protected] <[email protected]> On Behalf Of D Solt via groups.io
Sent: Tuesday, February 4, 2025 8:33 AM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] T41 receive attenuator working?? That was it!!!! Wrong address. Now all three boards work with varying receiver attenuation.? Now I'm on to calibration.? Thank you all for your help. ? The primary RF board (that is the Primary RX and TX) should be set to 0x27 which means that the three address lines A0, A1, and A2 should be set to ¡°111¡± or no shorted jumpers (J15, J16, J17). ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? ? Bill's right: you do not have the correct address for the MCP23017 chip. The I2C address is set by JP15, JP16 and JP17. The command "#define RF_MCP23017_ADDR" sets the address that the code looks for -- make sure the address in software matches the address you set using the solder jumpers.
|
The assembly manual T41_RF_Board_Assembly_Manual_V12_042324.docx was confusing in the following paragraph which I understood to say, use address "100":? Thanks for all you do on this project.? I am loving it!
"2. I2C addressing and switching.
The RF board is controlled via I2C communications from the V12 Main board.? An MCP23017 16 bit I/O expander is used to communicate with a central processor via SCL and ?SDA serial lines brought in through pins 7 and 5 of J3, the ¡°RF CONTROL¡± connector.? The I/O expander has hex address 0x24, and the user can select any of eight chip addresses from ¡°000¡± to ¡°111¡± shorting the solder switches provided (nb. the address of the expander for the T41 V12 primary receiver BPF address is ¡°100¡±¡ so the solder switch on the board for A2 at JP4 should be filled and the rest left blank).? See the following for more information: ?"
You are quite welcome Dave¡ For feedback, which documentation is lacking to help avoid a problem here? ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? ? That was it!!!! Wrong address. Now all three boards work with varying receiver attenuation.? Now I'm on to calibration.? Thank you all for your help. ? The primary RF board (that is the Primary RX and TX) should be set to 0x27 which means that the three address lines A0, A1, and A2 should be set to ¡°111¡± or no shorted jumpers (J15, J16, J17). ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? ? Bill's right: you do not have the correct address for the MCP23017 chip. The I2C address is set by JP15, JP16 and JP17. The command "#define RF_MCP23017_ADDR" sets the address that the code looks for -- make sure the address in software matches the address you set using the solder jumpers.
|
Ok thanks.? I see what went wrong¡ that section was copied straight out of the BPF manual and unfortunately not updated.? I can fix that. ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ?
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From: [email protected] <[email protected]> On Behalf Of D Solt via groups.io
Sent: Tuesday, February 4, 2025 10:49 AM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] T41 receive attenuator working?? The assembly manual T41_RF_Board_Assembly_Manual_V12_042324.docx was confusing in the following paragraph which I understood to say, use address "100":? Thanks for all you do on this project.? I am loving it! "2. I2C addressing and switching.
The RF board is controlled via I2C communications from the V12 Main board.? An MCP23017 16 bit I/O expander is used to communicate with a central processor via SCL and ?SDA serial lines brought in through pins 7 and 5 of J3, the ¡°RF CONTROL¡± connector.? The I/O expander has hex address 0x24, and the user can select any of eight chip addresses from ¡°000¡± to ¡°111¡± shorting the solder switches provided (nb. the address of the expander for the T41 V12 primary receiver BPF address is ¡°100¡±¡ so the solder switch on the board for A2 at JP4 should be filled and the rest left blank).? See the following for more information: ?"
? You are quite welcome Dave¡ For feedback, which documentation is lacking to help avoid a problem here? ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? ? That was it!!!! Wrong address. Now all three boards work with varying receiver attenuation.? Now I'm on to calibration.? Thank you all for your help. ? The primary RF board (that is the Primary RX and TX) should be set to 0x27 which means that the three address lines A0, A1, and A2 should be set to ¡°111¡± or no shorted jumpers (J15, J16, J17). ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? ? Bill's right: you do not have the correct address for the MCP23017 chip. The I2C address is set by JP15, JP16 and JP17. The command "#define RF_MCP23017_ADDR" sets the address that the code looks for -- make sure the address in software matches the address you set using the solder jumpers.
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K9HZ