Inverto Unifiber™ dSCR Optical Receiver

Product Description

The Inverto optical receiver 6114, part of the Unifiber™ series, is designed to convert optical signals into electrical RF signals. It is intended for operation with Inverto optical transmitters (models 6111/6112) and DTT processing units (models 6118/6119). The receiver features an Automatic Gain Control (AGC) system based on optical input level (OLC) for consistent RF output. This product is designed for indoor usage only.

Safety Instructions

• Installation must comply with IEC60728-11 and relevant national safety standards.
• The receiver operates on 13 - 20 V DC power, which is not hazardous to life.
• All repairs should be performed by qualified personnel.
• To ensure safe operation:
  • Connect all cables before plugging the receiver into the power supply.
  • Do not expose the receiver to dripping or splashing water.
  • Avoid placing the receiver near central heating components or in areas of high humidity.
  • If the receiver has been in cold conditions, allow it to warm up in a room for at least 2 hours before powering on.
  • Ensure adequate ventilation; do not cover the receiver with items like newspapers, tablecloths, or curtains.
  • Avoid looking directly into the optical beam, as laser light can cause severe eye injuries, potentially leading to permanent vision loss.

This product complies with European Directive 2012/19/EC regarding recycling and disposal. It is intended for indoor use only and requires functional grounding connected to the main potential equalization.

Compliance with EU norms: EMC EN50083-2, Safety EN62368-1, and RoHS EN50581.

Compliance with Custom Union Technical Regulations: "Electromagnetic compatibility of technical equipment" CU TR 020/2011, "On safety of low-voltage equipment" CU TR 004/2011. [CE marking] [EAC marking]

External View of the Receiver

Figure 1 illustrates the external view of the receiver with its various ports and indicators:

• 1. OPTICAL IN: Optical input port, uses an FC/UPC connector.
• 2. DTT 2: Output for DTT, DAB, and FM signals, uses an F socket.
• 3. dSCR2, DC IN: dSCR2 output port and DC input, F-type female connector.
• 4. dSCR1, DC IN: dSCR1 output port and DC input, F-type female connector.
• 5. DTT 1: Output for DTT, DAB, and FM signals, uses an F socket.
• 6. Functional grounding clamp: For connecting to the main potential equalization.
• 7. LED indicator of optical input power:
  • Red: Optical input signal is too high.
  • Green: Optical input signal is within the correct range (OLC range).
  • Yellow: Optical input signal is too low.
• 8. dSCR part powering mode switch: Selects the power source for the dSCR outputs. Options are:
  • Through dSCR outputs (ports 3, 4).
  • Through DC IN (port 9).
• 9. DC IN: +20 V DC powering input, uses a 3.5/1.3 mm DC jack.

The receiver also features a "dSCR power source" indicator and a "20V/7W max." label near the DC input.

Optical Connections

Ensure all optical connectors and adapters are clean before connecting. If optical reception power decreases, clean the fiber connection. Reel cleaners or lint-free wipes with alcohol are recommended. Fiber connectors should always be covered when not in use.

1. Align the FC/UPC connector key-way (type R) with the corresponding key-way on the mating connector.
2. Push firmly to engage the key-ways, then rotate the coupling ring clockwise to secure the connection.
3. Maintain a minimum bending radius of 30 mm for the fiber optic cable when connecting it to the system.

Installation Instructions

• Read the safety instructions first.
• All unused F-type connectors must be terminated with 75 Ω loads.
• Mount the receiver in a vertical position with the optical connector facing downwards.
• Ensure at least 10 cm of free space around the top, left, and right sides of the receiver for ventilation.
• Fasten the receiver using screws (screws are not included).

Powering

The receiver can be powered in two ways:

• Via an AC/DC adapter connected to the 3.5/1.3 mm DC input jack (port 9, Figure 1).
• Via the RF outputs (ports 3 and 4, Figure 1), which can supply power to connected devices.

Use the switch (port 8, Figure 1) to select the correct powering mode. Figure 2 illustrates the DC path diagram, showing the power distribution from the DC IN or dSCR outputs to the receiver's internal components (dSCR part, Rx). The DC-DC converters have maximum ratings of 4 W and 3 W.

Optical Input Level to the Receiver

The operational optical input level for the receiver is between -15 and -5 dBm. Within this range, the OLC system functions to provide fixed RF output levels. It is crucial to ensure the optical input level falls within this specified range. A direct optical connection between the transmitter and receiver is not recommended; use an appropriate optical attenuator if necessary.

Configuration

The available User Bands (UBs) and their frequencies for the dSCR outputs are detailed below, corresponding to Sky UK and EN50494/EN50607 standards. The user band bandwidth is 46 MHz.

Note: The table also indicates EN50494 and EN50607 bands with corresponding frequencies.

Requirements for External Power Supply Unit (PSU)

When using an external power supply unit (PSU), ensure it meets the following specifications:

• Output voltage: +20 V ± 1 V
• Output current: Recommended to use a PSU with 50% extra power reserve.
• Ripple at single and/or double mains frequency: < 10 mV p-p
• Ripple & noise: < 200 mV p-p
• Output connector type: 3.5/1.3 mm (+) plug
• Short circuit protection: Required.
• Double insulated (marked): Required. [double insulated symbol]
• The PSU should meet EN 55022 class B conducted emissions requirements, measured with a grounded load.

Technical Specifications

* The system performance depends on optical level.