If I  have two DX210s connected together over 2wire- does hitting ISO mean:· 

• Wireless isolation only on the base the belt pack is registered to?

• Or Wireless isolation across both bases?

Answer: The wireless isolation will only occur on the base the belt pack is registered to. Which means no audio is passed to the other basestation or any other wired comms that is attached to the basestation and audio is only sent to the other wireless beltpacks and the Aux output connector  

However  you can have some exceptions  

The DX210 system operation Normal mode :

►    Pressing the IC button talks to all Beltpacks and out of the 2 or 4 wired connection

►    You can enable 4wire mode only or 2&4 wire mode.

►    Note audio is not passed from the 2wire circuit to the 4wire circuit.

►    Pressing the ISO button talks to all beltpacks and not out of the 2w or 4w connector

 Select ISO+ button on the basestation

►    Pressing the ISO button talks to all beltpacks and out of the AUX connector 

Selecting ISO+ “Restricted broadcast” on the basestation via internal dip-switch

►    Pressing the ISO button talks out of the AUX connector and not to any beltpacks 

More detail SelectISO+ button on the basestation

►    Pressing the ISO button talks to all beltpacks and out of the AUX connector

►    ISO+ is commonly used for Stage Announce/Page functions, i.e. stage manager making back stage announcements.

The Aux Out (ISO+ on DX210) could also be connected to a matrix input and that audio could be a floor director’s IFB interrupt.

Lastly the Aux In and Out (with ISO+ on) could be used as a 3rd channel on the DX210 by connecting it through a 2/4wire adaptor to an external PL system  

Selecting ISO+ “Restricted broadcast” on the basestation via internal dip-switch

►    Pressing the ISO button talks out of the AUX connector and not to any beltpacks

►    This function is normally used to restrict access to the Aux Out channel and is used in conjunction with setting the ISO-disable function on the BPs

►    There are a few other uses for ISO+, such as using Aux In and Out to connect to a phone hybrid. In these case the choice to use the Aux I/O was made mostly because of the ease of using XLR connections versus the RJ45 on the four-wire I/O

►    The ISO Off ability (restricting ISO access on theBP210) allows the operator to keep unwanted traffic off the Aux (ISO+) Output.Example all the stage hands BPs can be ISO-disabled , so only the stage manager’s cues are heard backstage. With ISO restricted (off) both buttons on the BP210 are IC, so there is no chance of the stage hands mistakenly hitting the wrong button.