Instruction/ maintenance manual of the product RAT 1 Logic 3
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1 Speakers & Volume Controls RA T1 REMOTE AUTO TRANSFORMER The RAT1 is an infrared remote controlled stereo speaker volume control with impedance matching capability. It allows individual volume control of from one to 16 pair of stereo speakers from one stereo power amplifier, using one RAT1 for each stereo speaker pair.
2 2 A B C ADJ-OFF 1234 5678 GLOBAL Z-ADJ TREBLE VOL MUTE ON OFF E-FLAT LAST MAX-V TRIM OFF C-BAL BASS INPUT A RC68+ PROGRAMMER 80 48 10 90 01 00 C0 50 D0 41 40 A0 30 B0 21 20 E0 70 F0 61 60 88 18 .
3 Speakers & Volume Controls WHEN USING 8 OHM SPEAKERS Number of Speaker Pairs Used S1 S1 1 2 3 4 5 6 7 8 9 10 1 1 12 13 14 15 16 S2 S2 S4 S4 S4 S4 S8 S8 S8 S8 S8 S8 S8 S8 S1 S2 S4 S4 S8 S8 S8 S8 Min. Amp. Impedance 4 Ohms 8 Ohms WHEN USING 4 OHM SPEAKERS Number of Speaker Pairs Used Min.
4 Procedure for Speakers Other Than 4 or 8 Ohms In this case, treat all speakers that are rated between 4 and 7 Ohms as 4 Ohm speakers, and use the charts accordingly. Similiarly, all speakers that are rated 8 Ohms or higher, treat as 8 Ohms speakers.
5 Speakers & Volume Controls 6. Multiply 1.14 by 8 (for the S8 setting) = 9.12 Ohms. 7. Next, calculate the overall paralleled impedance Z O . Since three paralleled groups are used in this example, the calculation is as follows: Z O = 1 ÷ [(1 ÷ 16) + (1 ÷ 16) + (1 ÷ 9.
6 If you wish to carry remotes that have the same codes from room-to-room, use a Dedicated IR Bus System as shown in Fig. 4 . 5. A 490-30 "Micro Link" IR Receiver plugs into the 789-44 for local control of the source equipment (i.e. equipment behind closed doors, etc.
7 Speakers & Volume Controls Fig. 3 A RAT1 System Using a Common IR Bus RAT1 12VDC +12 VDC GND STA TUS IR IN EMITTERS IR RCVR 789-44 CONNECTING BLOCK ® S8 S4 S2 S1 L+ L– R– R+ L+ L– R.
8 INSTALLATION – DEDICATED IR BUS SYSTEM Fig. 4 illustrates an installation where each remote room has a Dedicated IR Bus going to the RAT1 that controls it. The IR bus is not connected in common as it is in Fig. 3 . This eliminates the need for dedicated remotes, allowing you to carry the same remote(s) from room-to-room.
9 Speakers & Volume Controls Fig. 4 A RAT1 Dedicated IR Bus System RAT1 S8 S4 S2 S1 L+ L– R– R+ L+ L– R– R+ AMPLIFIER INPUT SPEAKER OUTPUT STA TUS POWER IR IN STA TUS GND +12 VDC 12VDC.
10 In some cases you may need to drive more than one set of speakers from a single RAT1, such as in large rooms or adjoining areas where common volume operation is acceptable. A typical system is shown in Fig. 6 . 1. Use the same charts and rules for setting the impedance jumpers.
An important point after buying a device Logic 3 RAT 1 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Logic 3 RAT 1 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Logic 3 RAT 1 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Logic 3 RAT 1 you will learn all the available features of the product, as well as information on its operation. The information that you get Logic 3 RAT 1 will certainly help you make a decision on the purchase.
If you already are a holder of Logic 3 RAT 1, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Logic 3 RAT 1.
However, one of the most important roles played by the user manual is to help in solving problems with Logic 3 RAT 1. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Logic 3 RAT 1 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
