Full Duplex Satellite Station - Multiple Transverters with DIPS how to?

Fred, AB1OC

I am putting together a full duplex satellite system for my Flex 6700 using the DEMI 2MLPDA, DIPS, and DEMI/Q-Signal Transverters for 70 cm and higher. I want to be able to support a total of 4 transverters along with the 6700's 2M output. I'd like to support the following operating configurations:

1. Weak signal simplex Tx/Rx on 2M, 70cm, 23 cm, 5 cm (5 GHz), or 3 cm (10 GHz)
2. Full duplex satellite V/U or U/V
3. Full duplex satellite L/V
4. Full duplex satellite 5G/10G
5. Full duplex satellite 5G/U or 5G/V

I am planning to use this setup to operate my station remotely and the 2MLPDA and all four transverters will need to be turned on at the same time.

I have come up with a design that I think might work and I'd like to get some feedback from the Flex support folks and others here in the forums. Here's the design -



I have the following questions:

1. Will all of the above listed modes (especially the duplex listen while in Tx on another band) work correctly?
2. Is it OK to use simple BNC T connectors to fan out the 28MHz XVERT Tx IF to four transverters? Are they any issues with signal levels or loading on the Flex 6700 output if I do this?
3. Since all for transverters are on at the same time, I am assuming I must switch the RX IF so that only one transverter is connected to RX A on the 6700 at a time. I am planing to use BNC relays with good isolation characteristics and control them with a BITS cable. Are there any issues with this approach?
4. Does my configuration support simultaneous uplink Tx on one transverter while simultaneously listening on a different transverter's downlink? For example, can I Tx on a 5 GHz uplink and list on a 10 GHz downlink at the same time with this setup?
5. I would expect to locate the 5 GHz and 10 GHz transverters remotely at the antennas. Are there any issues with transporting the 28 MHz TX IF and RX IF through longer runs of coax cable? Is there a good way to isolate/buffer these connections to protect the rest of the gear that is indoors?
   
6. Are there any other issues or concerns that I should be aware of with this design?

Thanks in advance for the help!

Fred, AB1OC

K6HN

Fred, AB1OC

Via a pair of BITS cables.

K6HN

Fred, AB1OC

Thanks for the suggestion on the splitter. I will go that way. Does anyone know if the Flex 6700 28 MHz XVERT out path is a 50 or a 75-ohm design?

Mack

Fred, AB1OC

TU Mack! Want to be sure I understand what you are doing. You are using the relay board to switch PTT and to switch the Rx outputs from your transverters, one at a time, to be connected to the RX input on the Flex correct? I have ordered a Mini-Circuits 4-way splitter for the input side of the transverters as well.

Mack

KF4HR

Fred, AB1OC