Arcam DT91 manual Installation, Supply voltage, RS232 interface, Digital outputs

Installation

Positioning the unit

nPlace the DT91 on a level, firm, surface, avoiding direct sunlight and sources of heat or damp.

nAvoid placing the DT91 on top of a power amplifier or other source of heat.

nThe DT91 may run warm during normal operation, so avoid placing the DT91 in an enclosed space such as a bookcase or closed cabinet unless there is good ventilation.

nMake sure the remote-control receiver in the centre of the front panel display is unobstructed, otherwise remote-control will be unreliable. If line-of-sight is impractical, a remote-control repeater can be used with the rear panel connector. (see below).

nAvoid placing a record deck on top of this unit. Record decks are very sensitive to the noise generated by mains power supplies which will be heard as ‘hum’ if the record deck is too close.

Connecting up

Supply voltage

Move the slider to 115V or 230V, depending on the mains supply voltage in your area.

RS232 interface

The serial interface is available for controlling the DT91 from a computer or other controller. The remote control protocol is described

in the Appendix to this handbook.

Digital outputs

The DT91 is fitted with both optical and co-axial digital audio outputs; the two carry the same information at all times. If you wish, these can be connected to an external DAC or your AV receiver, which may enhance the final audio quality. Alternatively, they can also be used to connect this tuner to a digital recording device (such as a CD-R or Minidisc recorder) for direct recording.

When listening to a DAB radio station, these outputs carry audio with a sample rate of 48kHz; when an FM station is being received, the sample rate is 32kHz.

SUPPLY

VOLTAGE

115V 230V

POWER INLET

115/230V

				AUDIO OUTPUTS
			DIGITAL OUT	L
			AERIAL
			INPUT
PROGRAM	RS232	REMOTE	OPTICAL COAX	R
		IN		1	2

Mains lead Remote control in Aerial input socket Analogue audio outputs

The appliance is normally supplied with a moulded mains plug already fitted to the lead. If for any reason the plug needs to be removed, it must be disposed of immediately and securely, as it is a potential shock hazard when inserted into the mains socket.

Check that the plug supplied with the unit fits your supply and that your mains supply voltage agrees with the voltage setting (115V or 230V) indicated on the rear panel of the unit.

If your mains supply voltage or mains plug is different, or you require a new lead, please consult your Arcam dealer.

PLUGGING-IN

Push the plug (IEC line socket) of the power cable supplied with the unit into the socket (POWER INLET) in the back of the unit. Make sure it is pushed in firmly.

DT91

E-4

If you are using this tuner with an amplifier that also features a remote bus (such as the Arcam DiVA AVR300) you can connect

the REMOTE OUT of the amplifier to the REMOTE IN of the tuner using a 3.5mm jack lead.

This allows the tuner to be positioned out of sight while still offering remote control, since commands are passed through the amplifier. It can also be used to route control signals for multi- room use.

The remote control input requires a mono 3.5mm jack, with the tip active and the sleeve grounded.

The remote control signals must be in modulated RC5 format, with a voltage level of between 5V and 12V.

The coaxial cable from the aerial should be fitted with a 50Ω F-type (screw) connector. Connect this to the aerial socket on the back of this tuner, pushing the pin into the centre of the socket, then screwing on the cover to lock in place.

Take care not to over- tighten the F-connector (finger tighten only – do not use tools as this may damage the circuit board behind the connector).

See ‘Setting up the aerial’ for further information on the aerial type to use.

Two pairs of stereo analogue outputs are provided by the DT91, both of which provide the same signals. Connect one pair of these outputs to your amplifier using a suitable stereo phono cable. The second output pair may be connected to some other audio device, as desired, such as a cassette deck.

Note that interconnecting cables are not supplied with this tuner. We recommend the use of high-quality screened cables, since inferior-quality cables will degrade the overall quality of your system. Use only cables that are designed for an audio application as other cables will have different impedance characteristics that will degrade the performance of your system (for example, do not use cabling intended for video use to carry audio signals).

All cables should be kept as short as is practically possible.

It is good practice when connecting your equipment to make sure that the mains power-supply cabling is kept as far away as possible from your audio cables. This avoids unwanted noise in the audio signals.