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Signal quality The signal quality meter is a simple bargraph that gives a quick visual guide to reception quality. For DAB transmissions, it is an inverse measure of the Viterbi error rate, with zero errors at full scale (all segments are lit) and 500 errors/second (with all segments off). For FM transmissions, the bar graph shows a simple analogue measurement of signal strength. Secondary services (DAB only) Primary services can have one or more secondary services attached to them. These tend to be temporary; sporting events such as football matches, for example, may be broadcast as secondary services. Services that have secondary services attached to them are indicated by a ‘>’ symbol. Turning the rotary selector clockwise will then reveal these services. The secondary services themselves are indicated by a ‘<’ symbol. You need to select a main service in order to see if there are secondary services attached. Note that only primary services can be attached to a preset. Technical specifications Digital audio output Format SPDIF co-axial to gold-plated phono sockets SPDIF optical to TOSLINK Sample rate 48kHz (DAB mode) 32kHz (FM mode) Output impedance (co-axial) 75. unbalanced Analogue audio output Connectors Two pairs of stereo outputs to gold-plated phono sockets Output level 2.4Vrms at 0dB FS (DAB mode) 0.9Vrms at full modulation (FM mode) Output impedance <100. Minimum load 600. Frequency response (±0.5dB) 20Hz–20kHz RF performance (DAB mode) Tuning range 174–240MHz (Band III) 1452–1492MHz (L band) Sensitivity (VHF measurement to EN50248) better than –91dBm, typically –97dBm Audio data rate (maximum) 224kbits/s at MPEG protection level 3 RF performance (FM mode) Tuning range 87–108MHz Sensitivity (IHF) 3.V typical Signal to noise ratio 65dB at full modulation, 1kHz THD+n 0.1% at full modulation, 1kHz Aerial Connector F type Impedance 50. Remote control interface Remote bus input 36kHz modulated RC5 on 3.5mm mono jack socket Serial port RS232 to 9-way male D connector, DTE pin out. Remote control codes given in table on following page. General Supply voltage 115 or 230Vac, set by rear panel voltage selector switch Power consumption <20W Size W435 x D320 x H83mm Weight 3.6kg (net), 6kg (packed) Supplied accessories CR-389D remote controltwo x AAA batteriesMains leadIndoor ribbon aerial E&OE Note: All specification values are typical unless otherwise stated. Continual improvement policy Arcam has a policy of continual improvement for its products. This means that designs and specifications are subject to change without notice. Remote-control codes The following table gives the IR commands accepted by the DT91. The system code for the DT91 is 17 (in common with other Arcam tuners). Power commands Command Decimal Code Power on 123 Power off 124 Tuner control commands Command Decimal Code Select DAB 126 Select FM 127 MENU 61 or 125 DISP 18 or 71 1–9 1 or 91 2–10 2 or 92 3–11 3 or 93 4–12 4 or 94 5–13 5 or 95 6–14 6 or 96 7–15 7 or 97 8–16 8 or 98 MODE 37 or 121 < 33 or 78 > 32 or 77 BAND 50 or 87 Guarantee Worldwide Guarantee This entitles you to have the unit repaired free of charge, during the first two years after purchase, at any authorised Arcam distributor provided that it was originally purchased from an authorised Arcam dealer or distributor. The manufacturer can take no responsibility for defects arising from accident, misuse, abuse, wear and tear, neglect or through unauthorised adjustment and/or repair, neither can they accept responsibility for damage or loss occurring during transit to or from the person claiming under the guarantee. The warranty covers: Parts and labour costs for two years from the purchase date. After two years you must pay for both parts and labour costs. The warranty does not cover transportation costs at any time. Claims under guarantee This equipment should be packed in the original packing and returned to the dealer from whom it was purchased, or failing this, directly to the Arcam distributor in the country of residence. It should be sent carriage prepaid by a reputable carrier – not by post. No responsibility can be accepted for the unit whilst in transit to the dealer or distributor and customers are therefore advised to insure the unit against loss or damage whilst in transit. For further details contact Arcam at: Arcam Customer Support Department, Pembroke Avenue, Waterbeach, CAMBRIDGE, CB5 9QR, England. Problems? If your Arcam dealer is unable to answer any query regarding this or any other Arcam product please contact Arcam Customer Support at the above address and we will do our best to help you. On line registration You can register your Arcam product on line at: Appendix: Serial programming interface Introduction This section of the document describes the remote control protocol for controlling the DT91 via the RS232 interface. Conventions n The remote controller is referred to as the ‘RC’. n All values in this section are hexadecimal values, unle...