Hello all
Advice please.
I'm not a fan of the interconnections diagram for Portsdown. My colleagues at work who are electrical and electronic engineers haven't seen the convention before and this is a project aimed at ATV beginners like me and others. Mostly I can cope by logic except for 2 connections.
Terminal block J05 which connects to 3 boards has a pin 3 TX LED which doesn't appear anywhere else. What is supposed to happen here?
The ADF4351 board is labelled with +5V on the diagram. 4 connections leave the breakout and become 5 at the 4351. On the actual 4351 I see a pin for 3.3V and a socket for 9V i.e. nowt for +5V. Where does this board get its +ve power?
May I have a suggested fuse rating please per the fine G4KLB example seen on the Wiki?
all the best
David M0YDH
Interconnections
Re: Interconnections
Hi David
The Interconnect diagram uses a convention that is common on complex circuit diagrams with multiple parallel signal highways; for example http://www.seeedstudio.com/document/pdf ... ematic.pdf. The Portsdown diagram would look too complex if every wire was represented. However, you have spotted one very minor omission:
Pin 1 of J1C on the 4-band decoder should be labelled TX LED, not TX.
The power connections vary between the available eBay ADF4351 modules, so are left indistinct on the interconnect diagram. In your case, I would suggest connecting the power supply for the ADF4351 to the 9v socket. Do not connect to the 3.3V pin, this is a low voltage output from the module. My ADF4351 was quite happy with 5v input on the 9v pin. Yours may or may not work like this.
Hope that helps
Dave
The Interconnect diagram uses a convention that is common on complex circuit diagrams with multiple parallel signal highways; for example http://www.seeedstudio.com/document/pdf ... ematic.pdf. The Portsdown diagram would look too complex if every wire was represented. However, you have spotted one very minor omission:
Pin 1 of J1C on the 4-band decoder should be labelled TX LED, not TX.
The power connections vary between the available eBay ADF4351 modules, so are left indistinct on the interconnect diagram. In your case, I would suggest connecting the power supply for the ADF4351 to the 9v socket. Do not connect to the 3.3V pin, this is a low voltage output from the module. My ADF4351 was quite happy with 5v input on the 9v pin. Yours may or may not work like this.
Hope that helps
Dave