All this discussion on cable lengths and delays... Let's keep it real simple for simple minded folks like me
H field... up to 10M shielded CAT 5e/6 is best. Cat6 can be longer... (some reference say either can be 25m... but experience recommends shortest possible shielded CAT5e/6. Period. Amp mounts right at antennas, minimum lead.
E field... Coax integral part of filtering. Length is infinite, so to speak, preamp to amp. Suggest 1' to 1500'. But since it's part of the filter, suggest about 25' minimum.... Virtually no delay or power loss. All taken into design. CAT cable of absolutely minimum length, up to 25M... again, shortest possible. Other major factor in E probe is height above earth... mine's 7M... try to get at least 4-6M. Significant delays are from CAT not coax. After some operational time, the server more or less knows what your delays are! As long as they're within some predetermined maximum tolerance, they're cool.
E field amp is virtually immune to Controller or other noise, and can be right next to controller. In design testing, there were two very rare and unusual situations, in combination, that needed correcting, but you will not face them as a combination! Well,... maybe, but extremely unlikely, and neither will exist if you've followed the cookbook!
All the figuring and thinking has been done. You're welcome to do as you need and feel, but if you vary too much from the cookbook, down the road your signals may be rejected...
These guys know what they're doing.
Quality signal, everybody similar, and the server knows what it's about...
IMPORTANT: Make sure your E FIELD is in the "Amp 2" controller connection! Whether your have H field or not! If you have NOT entered your antenna types, dimensions on your User Data Page, you should do so. If you do not up date that info, again you might wind up being rejected a bit further down the road! Tell the server what antennas you're running! And you CANNOT do it with 'notes or comments' field... ( Which I have a suggestion for, a bit later, probably over in the 'signals test tool' thread.