WISI FLEXSWITCH DRC 17xx Multiswitch
Operating Manual and Technical Specifications
Product Overview
The WISI FLEXSWITCH DRC 17xx series represents a range of cascadable multiswitches designed for the distribution of satellite and terrestrial signals.
Key Features:
- Cascadable multiswitch for the distribution of 16 satellite polarisations and terrestrial signals.
- Passive terrestrial path.
- Integrated SAT amplifier for low insertion loss.
- Pre-emphasis to compensate for cable loss at high frequencies.
- Terrestrial signals are available at the receiver without any power supply to the multiswitch.
- High screening efficiency of Class A.
- Compact dimensions with installation-friendly spacing between F-connectors.
- Colour-coded inputs and outputs.
- Made in Germany.
Important Notes and Installation Guidelines
Pre-Installation Checks:
- Please check all coaxial cables for short circuits before starting installation.
- Ensure the mounting surface is flame retardant, dust-free, protected against humidity, not exposed to direct sunlight, and not adjacent to heating sources.
- Verify that the input levels of the SAT-lines are nearly equal.
- All installations and fixings should only be executed by skilled personnel when the unit is disconnected from the power source to avoid short-circuits.
Regulatory Compliance and Safety:
The installation must comply with relevant European and national standards and regulations for electrical security and broadcast receiving systems. A ground connection must be installed at the device (Ground connector) and the satellite dish using at least 4 mm² cables.
Grounding and Potential Equalization: Pursuant to EN 50 083-1, the satellite antenna system must comply with safety requirements, including grounding and potential equalization.
Application and Usage
This multiswitch is used for distributing 16 SAT-IF-Polarizations (e.g., ASTRA, EUELSAT, Türksat, and Hotbird) from four QUATTRO LNBs, along with terrestrial signals via a passive path.
Depending on the model, a single unit can connect a maximum of 8, 12, 16, 24, or 32 subscribers/receivers via TV/SAT wall outlets.
Signal Selection:
- The selection of IF-polarization is controlled by the receiver's signal: 14/18 V (Vertical/Horizontal) and 0/22 kHz (Low/High-Band).
- Satellite position selection is managed by DiSEqC signals from the SAT receiver.
Powering Cascade Types:
Cascade-type multiswitches can be powered by the external power supply unit DRP 1533 or through SAT trunk lines from connected multiswitches or amplifiers. It is crucial to consider the total current consumption and implement DC-blocks where necessary to avoid power conflicts.
Terminations:
- Unused cascade outputs must be equipped with DC-blocked terminating 75 Ohm resistors.
- To improve signal flatness, open subscriber outputs can be terminated with a 75 Ohm resistor.
Application Example
The diagram illustrates a typical installation setup. It shows satellite dishes (WISI ORBIT), terrestrial input, a cascade of multiswitch units (DRC 1708, DRA 1717), the DRP 1533 power supply, and subscriber outputs.
Colour Coding:
- VL (Vertical Low): Black
- HL (Horizontal Low): Green
- VH (Vertical High): Red
- HH (Horizontal High): Yellow
Power Supply DRP 1533:
Features a DC connector (5.5/2.1 mm) and can supply power to any multiswitch in the cascade.
DC-blocked terminating resistors (DV 25) are used for unused outputs.
Technical Specifications
The following table details the technical specifications for the WISI FLEXSWITCH DRC 17xx series, including models DRC 1708, DRC 1712/1716, and DRC 1724/1732.
| Parameter | DRC 1708 | DRC 1712/1716 | DRC 1724/1732 |
|---|---|---|---|
| Inputs SAT | 16 pcs. | 16 pcs. | 16 pcs. |
| Outputs SAT | 8 pcs. | 12/16 pcs. | 24/32 pcs. |
| Frequency Range SAT | 950...2400 MHz | 950...2400 MHz | 950...2400 MHz |
| Through Loss SAT | 1...2 dB | 1...3 dB | 2...5 dB |
| Decoupling SAT - SAT | 2...3 dB | 2...5 dB | 3...5 dB |
| Return Loss SAT | 30 dB typ. | 30 dB typ. | 30 dB typ. |
| Parameter | DRC 1708 | DRC 1712/1716 | DRC 1724/1732 |
|---|---|---|---|
| Inputs TERR | 1 pcs. | 1 pcs. | 1 pcs. |
| Outputs TERR | 1 pcs. | 1 pcs. | 1 pcs. |
| Frequency Range TERR | 5...862 MHz | 5...862 MHz | 5...862 MHz |
| Through Loss TERR | 2...3 dB | 2...5 dB | 3...5 dB |
| Isolation TERR - SAT | 30 dB typ. | 30 dB typ. | 30 dB typ. |
| Return Loss TERR | >10 dB | >10 dB | >10 dB |
| Parameter | DRC 1708 | DRC 1712/1716 | DRC 1724/1732 |
|---|---|---|---|
| Number of Outputs | 8 pcs. | 12/16 pcs. | 24/32 pcs. |
| Frequency Range | 5...2400 MHz | 5...2400 MHz | 5...2400 MHz |
| TERR Type | passive | passive | passive |
| Insertion Loss SAT | 2...0 dB | 3...0 dB | 2...0 dB |
| Insertion Loss TERR | 24 dB (±2 dB) | 28 dB (±3 dB) | 33 dB (±3dB) |
| Max. Output Level Subscriber SAT | 102 dBμV | 102 dBμV | 102 dBμV |
| Max. Output Level Subscriber TERR | 50...110 dBμV (passive) | 50...110 dBμV (passive) | 50...110 dBμV (passive) |
| Return Loss Subscriber SAT & TERR | >10 dB | >10 dB | >10 dB |
| Control Signal | 14/18 V, 0/22 kHz, DiSEqC 1.0 | ||
| Current Consumption from Receiver | 55 mA | ||
| Parameter | Value |
|---|---|
| Power Indicator | LED |
| Operating Voltage | 15 V DC |
| Max. Power Consumption | <0.2 W |
| Screening Factor | Class A, according to EN 50083-2 |
| Impedance | 75 Ω |
| Operating Temperature Range | -20...70 °C |
| Weight | 0.76...1.54 kg |
| Dimensions (W x H x D) | DRC 1708: 130x290x63 mm DRC 1712/1716: 189x291x63 mm DRC 1724/1732: 310x293x63 mm |
