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Radio Design Labs (RDL)

57-2422

RDL TX-TPS3A FORMAT-A SENDER Active, three pair, 3x phono, 3x balanced line input 

Radio Design Labs (RDL) TX-TPS3A

RDL TX-TPS3A FORMAT-A SENDER Active, three pair, 3x phono, 3x balanced line input

RDL TX SERIES INTERFACES - Format-A

These modules provide interfaces between audio circuits and components wired with conventional audio cables and connectors and the RDL Format-A system.

The RDL TX series modules are encapsulated 'black boxes' which may be mounted on a flat surface using doube-sided sticky tape. For hardware to mount TX Series modules on surfaces, to panels, to DIN-rails and a rack-mounting panel, see RDL TX Mounting Accessories. All models are supplied with a data sheet with installation details.

The RDL Format-A system is a proprietary scheme which links modular components together using cable types commonly used for communications and IT infrastructure, such as the Category 5 UTP cable used for Ethernet. Such a cable will have four pairs of wires, twisted together. The RDL scheme uses one pair to distribute power and three pairs, designated A, B and C, for up to three balanced, audio connections.

The audio connections over Format-A systems are analogue; for absolute clarity, please note that the fact that the type of cable used might otherwise be used for Ethernet does not imply in any way that the Format-A system uses any form of digital transmission between Format-A nodes, not Ethernet, not audio over IP, not DANTE or similar.

Note: Some RDL DANTE modules are available which have analogue inputs and outputs wired to the Format-A standard. The signals connected to those inputs and outputs must be analogue connections from other Format-A modules. The network connections to these modules will then convert the analogue Format-A signals to digital DANTE signals for transfer over the network.

For further information see:'RDL Format-A System'.

Senders - TX-TPS1A, TX-TPS3A, TX-TPS6A

These modules provide an interface between balanced or unbalanced audio circuits and the three audio pairs in a Format-A chain. Passive types require no power, using a transformer to provide balanced connections and galvanic isolation. Active types use electronic balancing and also provide a connection to one Format-A chain to provide power for other sender and receiver modules either at an end-point of a chain or at a location between end-points.

The active modules themselves require a source of power at 24V DC, with a capability to provide sufficient current for all the modules connected to the chain. The power is connected to the module via a coaxial inlet or a detachable terminal block. Some modules may have both. The output power is protected by an automatically resetting fuse; and LED indicator is provided to show that the power is available. Power can also be provided by another module on the Format-A chain, through the RJ45 connector(s).

An LED on the front panel indicates when power is supplied to the module. All have connections for audio inputs, using detachable terminal blocks for balanced line connections operating at a nominal +4dBu, RCA (phono) sockets for connections using a nominal level of -10dBV, or both, depending on model.

All have at least one RJ45 connector to connect to the Format-A chain. Where there are also loop-in connectors to position the module at a point at a location between end-points, all 8 pins of the two connectors are wired in parallel, allowing A, B and C signals to pass through, as well as power from another module.

Feature matrix:
Model Type RCA (phono) input Balanced line input RJ45 Loop-in socket Power inlets Pair select switch
TX-TPS1A Active, single pair, 1 1 Yes Terminals and co-axial input Yes
TX-TPS3A Active, three pair, 3 3 No Terminals and co-axial input No
TX-TPS6A Passive, single pair, 1 1 Yes None Yes

Optional accessories, active types: Power source supplies, see RDL Power Supplies, or power inserters, see below, or any other Format-A module which supplies power on the chain in use.
Optional accessories, all sender types: RDL Format-A receiver module(s), see RDL Format-A modules.

TX-TPS1A - Active, single pair, sender

This has two RJ45 connectors, for Format-A loop-in and output. A switch is used to select which of the Format-A signal pairs will be fed with the output of the module, A, B or C. Whichever pair is chosen should not have another sender connected elsewhere. Both RCA phono and terminal block connections are provided, one only should be used. Both a coaxial inlet and a detachable terminal block are provided for powering.

TX-TPS3A - Active, three pair, sender

This has three sets of both terminal block and RCA (phono) connections to feed three separate audio signals to the module. Either the terminal block or the RCA(phono) connector should be chosen for each signal. The signals are then buffered and sent out through a single RJ45 connector on pairs A, B and C of the Format-A chain. No other sending modules may be connected on the same cable as this module. Both a coaxial inlet and a detachable terminal block are provided for powering.

TX-TPS6A - Passive, single pair, sender

This has a single terminal block to connect a single signal to one pair of the Format-A chain. A transformer 'provides isolation' between the audio source and the RJ45 connectors connecting to the chain. There is a 'loop-in' connector and an output connector to connect to the Format-A chain. A switch is used to select to which signal pair, A, B or C, the module will feed. Whichever pair is chosen should not have another sender connected elsewhere. This is a passive module that does not require power to operate. If power is present on a cable connected to the loop-in RJ45 connector, that power is passed through to the modules connected to the output RJ45 connector.

Receivers TX-TPR1A, TX-TPR3A, TX-TPR6A

These modules provide an interface between balanced or unbalanced audio circuits and the three audio pairs in a Format-A chain. Passive types require no power, using a transformer to provide balanced connections and galvanic isolation. Active types use electronic balancing and also provide a connection to one Format-A chain to provide power for other sender and receiver modules either at an end-point of a chain or at a location between end-points.

The active modules themselves require a source of power at 24V DC, with a capability to provide sufficient current for all the modules connected to the chain. The power is connected to the module via a coaxial inlet or a detachable terminal block. Some modules may have both. The output power is protected by an automatically resetting fuse; and LED indicator is provided to show that the power is available. Power can also be provided by another module on the Format-A chain, through the RJ45 connector(s).

An LED on the front panel indicates when power is supplied to the module. All have connections for audio outputs, using detachable terminal blocks for balanced line connections operating at a nominal +4dBu, RCA (phono) sockets for connections using a nominal level of -10dBV, or both, depending on model.

All have at least one RJ45 connector to connect to the Format-A chain. Where there are also loop-out connectors to position the module at a point at a location between end-points, all 8 pins of the two connectors are wired in parallel, allowing A, B and C signals to pass through, as well as power from another module.

Since the connections made to the Format-A signal pairs A, B and C are bridging (high impedance), up to ten receivers can be connected to each pair on the output of the module, so the signals can be distributed to different areas.

Feature matrix:
Model Type RCA (phono) output Balanced line output RJ45 Loop-out socket Power inlets Pair select switch
TX-TPR1A Active, single pair 1 1 Yes Terminals and co-axial input Yes
TX-TPR3A Active, three pair 3 3 No Terminals and co-axial input No
TX-TPR6A Passive, single pair 1 1 Yes None Yes

Optional accessories, active types: Power supplies, see RDL Power Supplies, or power inserters, see below, or any other Format-A module which supplies power on the chain in use.
Optional accessories, all receiver types: RDL Format-A sender module(s), see RDL Format-A modules.

TX-TPR1A - Active single-pair receiver

This has two RJ45 connectors, for Format-A input and loop-out. A switch is used to select which of the Format-A signal pairs will be used as the input to the module, A, B or C. Both RCA phono and terminal block output connections are provided. Both a coaxial inlet and a detachable terminal block are provided for powering.

TX-TPR3A - Active three-pair receiver

This has a single RJ45 connector for the input from the Format-A chain. Three sets of both terminal block and RCA (phono) buffered output connections are provided, corresponding to Format-A signal pairs A, B and C. Both a coaxial inlet and a detachable terminal block are provided for powering.

TX-TPR6A - Passive single-pair receiver

This has both an input and a 'loop-out' connector to connect to the Format-A chain. A switch is used to select to which signal pair, A, B or C, will feed the module. A single terminal block to and an RCA (phono) connector provide the output from the chosen pair. A transformer 'provides isolation' between the audio outputs and the RJ45 connectors connecting to the chain. This is a passive module that does not require power to operate. If power is present on a cable connected to the loop-in RJ45 connector, that power is passed through to the modules connected to the output RJ45 connector.

Three-Pair Combiner to Single-Pair Sender - TX-TPSA1A

This module has one Format-A input on the front panel: the RJ45 connector accepts a three-pair Format-A twisted-pair cable with signals sent by from one or multiple Format-A senders. The module sums the signals received on the three pairs A, B and C. The summed output is fed to one of the pairs A, B or C on the output connector, as selected during installation using the switch on the front-panel.

The two remaining pairs are available for signals to pass through from other Format-A senders connected to the Loop-In RJ45 socket. The RJ45 Loop-In jack can accept two signals and power from other Format-A modules providing microphone or line inputs. Two single-pair senders can be connected to the Loop-In socket, or one sender that uses two pairs.

The TX-TPSA1A may be powered from any of the RJ45 connectors, which provides power to the two remaining RJ45 jacks. The module may also be powered from an external 24V DC power supply connected to the DC input socket, which provides power to all three RJ45 jacks. The power output is protected by an automatically resetting fuse. An LED on the front panel indicates the presence of valid power.

Power Inserters - TX-TP1PW, TX-TP4PW

These modules provide a connection to one Format-A chain to provide power for sender and receiver modules from a convenient location, either at an end-point of a chain or at a location between end-points. The modules themselves require a source of power at 24V DC, with a capability to provide sufficient current for all the modules connected to the inserters. The power is connected to the module via a coaxial inlet or a detachable terminal block. Some modules may have both. The output power is protected by an automatically resetting fuse; and LED indicator is provided to show that the power is available. An LED on the front panel indicates when power is supplied to the module.

TX-TP1PW

This has two RJ45 connectors to provide power for one Format-A chain. The two connectors are connected in parallel, allowing signals on the A, B and C signal pairs of the two connectors to pass through the modules. The power supply is connected by either the coaxial power inlet or the detachable terminal block

TX-TP4PW

This has four RJ45 connectors to provide power for one Format-A chain. The four connectors are connected in parallel, allowing signals on the A, B and C signal pairs of the four connectors to pass through the modules. The module is powered via a coaxial inlet.

Example configurations:

One RJ45 connector receives signals from Format-A twisted pair senders. The remaining three RJ45 jacks each connect to a separate twisted pair receiver. Three jacks are provided so that three runs of cable to twisted pair receivers are possible. This is 'particularly useful for powering three high current receivers that cannot be daisy chained, such as D-PSP1A Powered Speakers'. In this configuration the TX-TP4PW might be thought of as a 'splitter'.

The reverse of the above, where three separate cables from separate Format-A senders converge at the TX-TP4PW. The fourth RJ45 becomes an output with signals on all pairs A, B and C. The TX-TP4PW in this configuration might be described as a 'combiner'. Apparently 'this is useful in installations where daisy chaining senders is not practical'.

RDL tell us that using a TX-TP4PW to 'send signals in both directions over a single Format-A cable' is a 'non- typical use. Advanced users only.'

  Description Price (£) Add to basket
RDL TX-TPS1A FORMAT-A SENDER Active, single pair, 1x phono, 1x balanced line input   Stock code:
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£118.90
RDL TX-TPS3A FORMAT-A SENDER Active, three pair, 3x phono, 3x balanced line input   RDL TX-TPS3A FORMAT-A SENDER Active, three pair, 3x phono, 3x balanced line input Stock code: 57-2422
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£136.70
RDL TX-TPS6A FORMAT-A SENDER Passive, single pair, 1x balanced line input   Stock code:
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£79.58
RDL TX-TPR1A FORMAT-A RECEIVER Active, single pair, 1x phono, 1x balanced line output   Stock code:
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£120.00
RDL TX-TPR3A FORMAT-A RECEIVER Active, three pair, 3x phono, 3x balanced line output   Stock code:
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£136.80
RDL TX-TPR6A FORMAT-A RECEIVER Passive, single pair, 1x phono, 1x balanced line output   Stock code:
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£79.52
RDL TX-TPSA1A FORMAT-A COMBINER Active, three pair input to single pair output   Stock code:
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£101.70
RDL TX-TP1PW FORMAT-A POWER INSERTER 2x RJ45 output connectors   Stock code:
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£73.73
RDL TX-TP4PW FORMAT-A POWER INSERTER 4x RJ45 output connectors   Stock code:
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£72.13

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