HelixNet | User Guide
There are four Channels (A, B, C and D), comprising two 3-pin XLR connectors, on
the MS-704.
Connect to the selected Channel using standard microphone cabling.
Note: The Two-wire module will not function without an attached power supply on the
analog side of the interface.
Ensure that the connection is terminated (using the termination switch beside the
connectors). The default position for the switch is on.
To adjust nulling on a Channel on the Encore Main Station (MS-704):
1. Turn the screwdriver-adjustable Sidetone Adjust control (just below the headset connector)
to the appropriate level.
2. Turn the screwdriver-adjustable Listen level control (the null control, located just below the
Channel Talk button and Call LED) for the Channel to the appropriate level.
Tip: If the headset microphone is being used, hum or gently scratch the mic for a
continuous signal source to null on. If a good null is not attainable, switch the Long /
Short DIP switch for the Channel to its opposite setting. Use the setting that
produces the best audio quality.
To optimize audio quality, you may also want to adjust the Audio Settings on the
HMS-4X Main Station. For more information, see Configuring the Audio Settings.
Tip: The amount of null that is required changes when you add or remove devices, or
alter the length of the cabling. For optimum performance, Clear-Com recommends
that you adjust the nulling every time you make a change to the system configuration.
Note: Ensure that all Talk keys/routes are disabled before auto-nulling commences.
19.3.4 Connecting to Encore Remote Stations
Connecting to an Encore Remote Station (for example, the RM-704) is similar to connecting to an
Encore Main Station (see Quick reference: Connecting to Encore)
You will require a separate power supply, for example, the PS-702 (two Channel) or PS-704
(four Channel) power supply, to power the Remote Station which is unpowered and any
connected wired beltpacks.
19.4 Connecting HelixNet Partyline to RTS (Telex) two-wire systems
19.4.1 About RTS two-wire systems
HelixNet Partyline is also designed for interoperability with RTS (Telex) TW (two-wire) analog
Partyline systems from Telex.
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