Sennheiser ASP 2 Antenna Splitter 1:4

Instructions for use

Brief Description

The Sennheiser ASP 2 is a passive RF antenna splitter designed for routing antenna signals to multiple receivers in a multi-channel system. It allows up to four diversity receivers to be supplied with signals from only two antennas. The unit incorporates DC distribution for powering up to four receivers and two antenna boosters using a single mains unit. Linking two ASP 2 units enables an 8-channel system to operate with just two antennas. The optional GA 2 rack adapter allows two ASP 2 units or one ASP 2 and a rack-mount receiver (e.g., EM 100 G2, EM 300 G2, or EM 500 G2) to be mounted in a 19" rack.

Areas of Application:

Small to medium RF installations (fixed or mobile)
Permanent installations in small theaters, conference centers, and similar venues

Delivery Includes:

1 ASP 2 antenna splitter
1 set of plastic feet
Instructions for use

Safety Instructions

Caution! Never open the unit. Opening the unit voids the warranty.

Attention! Ensure air vents are not covered or blocked. Keep the unit away from central heating radiators and electric heaters. ⚠️

Caution! Set up the unit on an even surface or mount it into a rack. Lay cables to prevent tripping hazards. ⚠️

Attention! Keep liquids and small, conductive parts away from the unit. Clean with a slightly damp cloth only. Do not use solvents or cleansing agents. ⚡

Operating Controls

The Sennheiser ASP 2 features the following controls and connections:

1: DC input (DC IN) for mains unit
2: Cable grip for power supply DC cable
3: Four DC outputs (DC OUT) for powering up to four receivers
4: Antenna input B (IN B, DC-FEED 12 V), BNC socket
5: Four antenna outputs (OUT B), B leg
6: Four antenna outputs (OUT A), A leg
7: RF output A (link to antenna input B 4 to make a 1-to-8 splitter), BNC socket
8: Antenna input A (IN A, DC-FEED 12 V), BNC socket

Diagram Description: A line drawing shows the rear panel of the ASP 2 unit with labeled BNC connectors for antenna inputs and outputs, DC input, and DC outputs. Cables are shown connected to the outputs.

Putting the Unit into Operation

The following connection diagram illustrates the setup for a 4-channel diversity system.

Diagram Description: A block diagram shows two antennas (ANT A, ANT B) connected to the ASP 2 unit. The ASP 2 unit splits the signals to four receivers via DC OUT and OUT A/OUT B connections. DC IN is shown for power.

Setting up the Unit

The unit can be used as a table-top device or mounted into a rack.

For 19" rack mounting, use the GA 2 rack adapter (optional accessory).
For table-top use, attach the included plastic feet to the base of the unit.

Note: Some furniture surfaces may be treated with finishes that could cause staining upon contact with the unit's synthetics. Despite thorough testing, Sennheiser cannot rule out the possibility of staining.

Connecting the Antennas

You can connect the following antenna types to the antenna inputs 4 and 8:

Two A 1031-U or A 2003-U passive antennas
Two A 12 active antennas
A combination of a passive antenna (A 1031-U or A 2003-U) and an antenna booster (AB 2)

Diagram Description: A diagram shows the ASP 2 unit with cables connecting to antennas labeled ANT A and ANT B.

Connecting the Receivers

Up to four rack-mount receivers (e.g., EM 100 G2, EM 300 G2, or EM 500 G2) can be connected to the ASP 2. The splitter provides DC distribution for powering the receivers.

Pass the cables from the antenna splitter's DC outputs through the cable grips on the rear of the receivers.
Insert the hollow jack plugs into the receiver sockets.
Connect the BNC cables from the antenna splitter's outputs to the receivers:
- Antenna outputs (OUT A) 6 to antenna inputs (ANT I) 12
- Antenna outputs (OUT B) 5 to antenna inputs (ANT II) 11

Note: It is recommended to protect unused RF outputs with a 50 Ω terminator to maintain specified distribution attenuation.

Diagram Description: A diagram shows the ASP 2 unit connected to an EM 500 G2 receiver. Cables are shown connecting antenna outputs to receiver antenna inputs, and DC power is supplied.

Connecting the Mains Unit

The NT 1 mains unit can power up to four receivers and provide DC power to two optional antenna boosters via the antenna inputs.

Pass the power supply cable through the cable grip 2.
Insert the DC connector of the power supply cable into the DC input 1.

Note: The antenna splitter does not have a power switch.

Diagram Description: A diagram shows the ASP 2 unit with the power supply cable connected to the DC input.

If Problems Occur...

Error Checklist

Problem	Possible Cause	Possible Solution
Receivers cannot be switched on	Receivers are not powered	Check the connections of the mains unit or the DC connections.
Disturbed reception or no reception	Transmitting antennas are not within the range of the receiving antennas	Reduce the distance between transmitter and receiving antennas.
	Transmitters or receivers are not switched on	Switch the transmitters or receivers on.
	Antennas are not connected correctly	Check the antenna connections.
	Connecting cables are defective	Replace the connecting cables.
	Too high cable attenuation due to too long antenna cables or wrong type of antenna cable	Only use the recommended antenna cables (see "Accessories" on page 21) or use shorter antenna cables.
	Transmitters and receivers are not on the same frequency	See operating manual of the transmitter or receiver.

If problems occur that are not listed above or cannot be solved with the proposed solutions, contact your local Sennheiser agent for assistance.

Specifications

Antenna splitter: 2 x 1:4 or 1 x 1:8, passive
Frequency range: 500 to 870 MHz
Distribution attenuation: approx. 10 dB IN B/OUT B (4x), approx. 14 dB IN A/OUT A (4 x), approx. 6 dB IN A/OUT A
Dimensions: approx. 212 x 145 x 38 mm
Weight: approx. 700 g
Voltage range: 12 V DC nominal, max. 16 V DC

Accessories

NT 1: Mains unit for powering up to four receivers and two antenna boosters, European version
NT 1-120: Mains unit for powering up to four receivers and two antenna boosters, 120 V version
NT 1-UK: Mains unit for powering up to four receivers and two antenna boosters, UK version
GZL 1019-A1: BNC-BNC coaxial cable, length 1 m
GZL 1019-A5: BNC-BNC coaxial cable, length 5 m
GZL 1019-A10: BNC-BNC coaxial cable, length 10 m
A 1031-U: Passive UHF antenna
AB 2: Antenna booster
GA 2: 19" rack adapter
AM 2: Antenna mount for mounting antennas to the front of the GA 2
A 2003-UHF: UHF directional antenna
A 12: Active UHF directional antenna
BNC terminator (50 Ω)
Voltage isolation adapter

Application Example

Two ASP 2 antenna splitters can be linked to create a 1-to-8 diversity splitter.

Diagram Description: A diagram shows two ASP 2 units linked together to form an 8-channel system, with inputs from ANT A and ANT B, and outputs to multiple receivers.

Diagram Description: A diagram shows two 4-channel systems linked together.

Guarantee Information

The guarantee period for this Sennheiser product is 24 months from the date of purchase. Excluded are accessory items, rechargeable or disposable batteries. The guarantee period starts from the date of original purchase; retaining the sales receipt is recommended as proof. Guarantee service may include repair or replacement of parts or the entire device. Inappropriate usage, mechanical damages, incorrect operating voltage, wear and tear, force majeure, and pre-existing defects are excluded from guarantee claims. The guarantee is void if the product is manipulated by unauthorized persons or repair stations. For claims, send the device, accessories, and sales receipt to the responsible service partner, preferably in original packaging. Legal rights against the seller are unaffected. Guarantee claims can be made in all countries outside the U.S., provided national law does not limit these terms.

Compliance and Contact Information

Konformitätserklärung: Sennheiser electronic GmbH & Co. KG declares that this device complies with applicable CE standards and regulations.

Approval: Sennheiser electronic GmbH & Co. KG declares that this device is in compliance with the applicable CE standards and regulations.

Certification: Sennheiser electronic GmbH & Co. KG déclare que cet appareil est en conformité avec les normes CE.

Certificazione: Sennheiser electronic GmbH & Co. KG dichiara che questo apparecchio risponde alle normative e alle prescrizioni CE applicabili.

Autorizacion: Sennheiser electronic GmbH & Co. KG declara que este aparato cumple las normas y directrices de la CE aplicables.

Vergunning: Sennheiser electronic GmbH & Co. KG verklaren, dat dit toestel voldoet aan de toepasselijke CE-normen en voorschriften.

Service Number (Germany only): K.I.S.S. Kunden-Informations-System-Sennheiser, 0180/5221539 (0,12 € per minute, Mon-Fri: 8:00 AM - 6:00 PM).

Sennheiser electronic GmbH & Co. KG
30900 Wedemark, Germany
Phone: +49 (5130) 600 0
Fax: +49 (5130) 600 300
Website: www.sennheiser.com

Printed in Germany. Publ. 12/03. Document Number: 90686/A01

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