Two-Wire Connection to an Eclipse or Eclipse-HX System Frame

To connect your HelixNet Partyline system to an Eclipse or Eclipse-HX System, using a two-wire connection:

1. On the HMS-4X Main Station, configure the Module Settings for the Two-wire interface module. For the procedure, see Configuring a Two-wire interface module.

Note: Check that the two-wire module is configured for Clear-Com systems (the default) and run Auto-null. Auto-nulling helps to reduce echo while talking on a two-wire audio system. You must run auto-null every time you change the cabling.

2. Physically connect the HMS-4X Main Station (HLI-2W2) to the CCI-22 dual-Channel party-line interface module.

The CCI-22 may be fitted:

• Directly to an Eclipse or Eclipse-HX System.

• An interface frame (such as the IMF-3 or IMF-102), connected to the Eclipse matrix.

Tip: For more information about installing and using the CCI-22, see the CCI-22 Manual, or go to: http://www.clearcom.com/product/digital-matrix/interface-modules/cci-22

Powering the connection:

You must power the connection between the HMS-4X Main Station (HLI-2W2) and the CCI-22 using either a dedicated power supply (such as the PK-7, PS-702, or PS-704), or a powered Encore Main Station (such as the MS-702 or MS-704).

Tip: For more information about the PK-7 or PS-70x power supply devices from Clear-Com, see http://www.clearcom.com/product/Partyline/power-supplies

Connecting the systems:

There are two parallel DB-9M Interface I/O connectors on the CCI-22. The two-wire module on the HMS-4X Main Station features two 3-pin XLR connectors. For more information about wiring the connection, see:

• Quick Reference: Two-Wire Connection to Eclipse

• The CCI-22 Manual.

3. Apply nulling to the connected Channel on the CCI-22. To null the Channel:

   1. Insert the accessory earphone into the front-panel Test jack. A test tone, for all frequencies, is produced every 0.5s.

   2. While listening to the test tone, adjust the R (Resistance) control until the tone is at a minimum.

   3. Repeat Step b. for the L (Inductance) and C (Capacitance) controls. These controls compensate for each component of the line’s impedance, providing the best possible null.

Because the R, L and C controls interact, you may have to adjust these controls several times to minimize the test tone / achieve a deep null.

Note: The null circuit on the CCI-22 is effective on line lengths between 0 - 4000 feet (1200m) with impedances in the range of 120 to 350 ohms. Nulling can reduce local audio in the received signal by < 30 dB over the 200 Hz - 8 kHz frequency range.

Tip: For more information on the CCI-22 nulling circuit, see the CCI-22 Manual.

4. If necessary, adjust the In/Out level controls on the CCI-22 (Send and Recv, located on the front panel next to the R, L and C nulling controls).

Note: The Send level control affects the level of the audio signals from the

Eclipse Matrix to the external party-line, and the Recv control affects the level of the audio from the party-line into the matrix. The Send and Receive controls have a range of ± 13 dB.

Tip: For more information about managing the HelixNet to Eclipse connection in EHX, see your EHX documentation (including Help).