PVM 2030 db25 to BNC adapter box, sync resistor purpose? *

[deezdrama]

Seen this adapter in a pic of a pvm 2030 for sale.
Asked the seller about it, He said it was made by a previous owner inside a little hobby box.

Im wanting to build some for me and a buddys pvm 2030s and 2530s but wondered what the purpose of the resistored sync switch is for? Does it just add more device compatibility? Makes it safe for ttl level devices?
We only plan to connect consoles or mister fpga so I assume its safe to leave this sync resistored switch out?

[Syntax]

Flick that switch one way, you send sync directly to the PVM, the other way its attenuated.

Bit odd as I expected a PVM to accept TTL sync all day. If anything you'll be removing resistors from cables.

[Dochartaigh]

Flick that switch one way, you send sync directly to the PVM, the other way its attenuated.

Bit odd as I expected a PVM to accept TTL sync all day. If anything you'll be removing resistors from cables.

So I wouldn't be surprised if it needs way lower sync voltage... there's not a 2030 service manual online (only the EU PVM-2130 with SCART connector), but the PVM-2030 and 2530 share the regular 'operations manual', and in the service manual for the 2530 it only takes 1vpp for sync over the CMPTR 25-pin connector (TTL level is only for digital RGB when pin 9 of the connector is grounded - which doesn't apply for non-old-PC users like us who use this for video game consoles).

I actually have a DB25 connector to BNC box for my PVM-2530, and have it on my list to add a 470Ω resistor it, just to be safe (especially since my Crosspoint switcher always outputs sync as 5vpp).

[deezdrama]

I just got some female db25 connectors in, not sure if im going to build an adapter box or just a simple db25 to bnc cable.
I have a 25ft 5bnc cable ill probably just cut in half and make 2 of these cables since im also picking up a pvm 2530 next week.

Im using a mister fpga with RGBs so i guess ill just cut the bnc cable in half and solder in the db25 connector.
Ill never be feeding ttl level signals so shouldnt need to add any resistors right?