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Contact Us		Stacker/Destacker Note: We are no longer selling these systems. This page is left here for information only. PLEASE DO NOT ASK US QUESTIONS ABOUT IT. All the information is here. Johansson Stacker-Destacker type 9633KITUK "How can I operate two satellite receivers independently using only one coax cable?" Thus far the answer has always been "You can't". Johannson has taken care of this problem with their Stacker-Destacker. Even though a Twin- or Quad-output LNB is still needed, the additional coax cable for the second receiver or tuner can be omitted. However the cable MUST be high quality double-shielded satellite coax - you can't use ordinary TV aerial cable. The entire kit consists of a Stacker upstairs, a Destacker downstairs, the necessary short coax cables, mounting hardware and an installation manual. The small Stacker box is mounted directly behind the LNB and has two inputs (5-2,150 MHz and 950-2,150 MHz) and one output (5-3,550 MHz). Just by looking at the frequency ranges you can see that the Stacker module places the individual Intermediate Frequency blocks one above the other. When used with a multi-switch, the signals from a terrestrial antenna can also be fed into the first input. The Destacker is intended for home use. So, you connect two of your LNB outputs to the Stacker unit. Connect the stacker output via single cable (with no joints or wall plates interposed) to the Destacker input. Two short coax cables link the 2 Destacker outputs to a pair of satellite TV receivers or to a PVR with two tuners. (You may use wall plates for the output cables.) The Destacker takes the incoming 5-3,350 MHz Range and converts it back to 950-2,150 MHz for satellite receivers and 5-2,150 MHz so that 5 - 950 MHz terrestrial signals can also be routed to a TV by using a decombiner (diplexer). The entire installation is completed in only a few minutes and the result is extraordinary. With just a minor loss in the IF range (4dB with double-shielded cable) it is possible to operate two satellite receivers entirely independent of each other. It doesn't matter if the first receiver is in the upper band or the lower band nor does it matter what polarization is in use; the other receiver can do whatever it wants to. When used on a PVR with two tuners (like the SKY+ Digibox), one program transmitted in vertical polarization in the upper band can be recorded while at the same time a second program in (eg.) horizontal polarization in the lower band can be watched from the same satellite independent of the first program.   Conclusion Whenever it is impossible to run a second cable so that two receivers can be operated independently of each other on one dish, you can use the Stacker-Destacker from Johansson. The installation is made easy with the included accessories and the user manual. The signal loss in the IF range is a mere -4dB resulting in very little reduction in signal quality. The cable between the stacker and the destacker should be WF100 or better. It should be one continuous length, without kinks or sharp bends and without connectors or wall plates. It should be at least 7 metres long but not more than 40 metres. If you can't guarantee this, then we recommend that you do not use this equipment. The communal version should be installed by a professional (approved by the communal management company). Panasonic Sky Digiboxes have an "allergic reaction" to certain LNBs and can be problematic with the Stacker system. We recommend Pace Digiboxes. A 9637 amplifier is required only where the cable is too long. If the system works OK then there's no point in ordering an amplifier. Just one amplifier is required for the Stacker. You don't need one for the Destacker. There's only one cable connecting them together. An amplifier is not a substitute for good quality cable. We've sold a lot of these systems and we got about 20% returned as "faulty". In all cases the equipment was NOT faulty so we can only assume that people are trying to use inferior or damaged (kinked) cable, or cable of the wrong length, or using cable-joints or wall plates. Specifications Model: Johansson Stacker-Destacker 9633KITUK Function: 2 Receivers on 1 LNB (twin)with one cable Stacker Inputs: 1 x 5-2150 MHz1 x 950-2150 MHz Stacker Output: 5-3350 MHz Insertion Loss/Gain: Terrestrial -1 dB, Satellite -4 dB,Converted Sat +10 dB Destacker Input: 5-3350 MHz Destacker Outputs: 1 x 5-2150 MHz 1 x 950-2150 MHz Insertion Loss: Terrestrial -1 dB, Satellite -4 dB, Converted Sat -5 dB Analogue or Digital receivers (or mixed). Takes power from receiver LNB supply Stacker 80mA, Destacker 50mA max. Current limiter switch for receiver protection Terminals: "F" connectors Dimensions: 146x73x24 (201x87x42 including flanges) Recommended cable: WF100, H109 or CT100 Cable length: 7m to 70m max. Global Approval Recommended by BskyB for SKY+ Minimum cable length 7 metres. (Do not use with shorter cables). NOT recommended for communal distribution systems. Use only with an LNB For communal systems use 9639KIT (with a 9637 amplifier at head end if required). Note: We are no longer selling these systems. This page is left here for information only. PLEASE DO NOT ASK US QUESTIONS ABOUT IT. All the information is here. The stacker unit moves the LNB2 signals to a higher frequency block so they don't interfere with those from LNB1. A UHF aerial signal can be added by using a suitable diplexer to combine it with the LNB1 signal. The Destacker peforms the reverse operation by shifting the LNB2 signal back to its normal frequency block. If a UHF signal has been added to LNB1, it must be separated by connecting a suitable diplexer. Johansson 9637 wideband amplifier for use with Stacker/destacker where cable length exceeds 40 metres. 1 required per stacker. Download PDF information sheet (No longer available from SatCure).   Send this page address - CLICK HERE - to a friend !   Return to SatCure index page Copyright ©1997-2011 Martin Pickering Version 1.4 updated on July9, 2011 This file may be downloaded for private and personal use but NO part of it may be published in any form without the prior permission of the author.