Stereo Tool

If it supports 192 kHz, then usually yes. I can't tell if this always works, but we have never had an issue connecting Spdif to AES/EBU, which your transmitter probably expects. Note that the transmitter also needs to support 192 kHz digital MPX input, left/right won't work.

None, the recommended length for mpx signals with rg58 is 1.80 m , for rg59 less than 3m , beyond these lengths you will have a strong loss of separation.

Orban 8100 manual

Composite ( Baseband) Output
Source Impedance: 470 ohms, independent of OUTPUT ATTEN setting, unbalanced.
Level: variable 0 to greater than 4V p- p by means of 15- turn OUTPUT ATTEN
control.
Connector: Type BNC held floating over chassis ground to permit interface to
various exciters without need for wideband transformer for ground loop suppression.
RF suppressed.
Recommended Maximum Cable Length: 6ft ( 1.8m) RG-58A/U.


pag.L4

https://worldradiohistory.com/Archive-C ... l-1986.pdf

Nope, graph in 8500 manual tells different story.
RG58 capacity per meter is 100pf/m.
According to graph degradation starts at about 4nf (about 55dB separation). That's more than any commercial receiver can separate @15KHz.
So, 30 meters is fine.
I have one installation with 17m RG58 and the separation is above 45dB (this is maximum ability of the Studer tuner to separate the channels).

Koenzk what kind of transmitter are you using? Why do you need 30 meters of composite audio line? Consider spending the money on lower loss, larger diameter RF coax on the antenna side.

I'm using a RVR PTX 30-LCD (https://www.rvr.it/en/products/compact- ... -tbq7c5ux/) transmitter now.
I ended up using the balanced TRS jacks of the ESI Juli@ soundcard as the RVR PTX 30-LCD has a balanced MPX input (XLR) with a cable of 25 meters/80 feet.