DSR905 PDF Connection Document

Picture of DSR-922 Back

Picture of DSR-920 Back

1. Coaxial Wire

2. Skew

3. Actuator (motor arm)

4. Tips












1. To connect your big dish to your receiver you first need coaxial wire. Two are recommended as a minimum one for C-Band and one for Ku-Band. If you don't currently have ku-band it's a good idea to install an extra coaxial wire now then try to install one afterwards, is often a lot of work.

About coaxial wire for big dish setups you can buy an all in one type ribbon cable that includes all the necessary wire with 2 coaxial wires to hook up your big dish. Comm/Scope makes satellite cable 8530 which is UL (Underwriters Laboratories) listed and the difference between it and the standard 8136 is not that the 8530 is plenum, but it is the coaxial cables have a 60% braid(8530) instead of a 40% braid (8136). Another difference is that it has one extra drain wire (for draining off static electricity that can result in a surge that can damage equipment). The most noticeable difference between the two ribbon cables is, the actuator motor wires are larger. On the 8136 satellite ribbon cable, the wires are 16 gauge, as compared to 14 gauge on the 8530 cables. Actuator motor wires are larger on the 8530, customers who have a long cable run (more than 200 feet in total length) will benefit by the actuator speed not slowing down as compared to the 8136 wire. There is more voltage drop in smaller gauge wire, so if you use a larger gauge wire you should not see this type of a problem if you have a longer cable run. It has also been noted if you want the best coaxial wire install RG11 as its signal loss per foot is less than RG6 wire. If you are running your coaxial wires over or along high voltage wires it would be wise to install quad-shielded coaxial cable. It is also noted that installing conduit (plastic pipe) buried under the ground is the best way to run coaxial wires and keep them from being damaged when you do lawn or garden work. Make sure you install a ground block usually at the outside location of your entrance into the building, and leave a small drop loop of coaxial wire if you ever need to put new coaxial ends on you will have a little extra wire. At your big dish you might decide to also install a small mini-dish system or even in the future a two way satellite (send & receive system) for internet purposes. You might consider running a few extra strands of coaxial wire to the dish's location outside when installing your big dish coaxial wire depending on your budget.

The actuator wire size is especially important on a 4DTV setup, since the receiver's power supply will only put out 24VDC, instead of 36VDC like most of the other C-Band satellite receivers put out. There are drawbacks to both voltages, but I would prefer the 36VDC output. This is because it can drive a larger dish with lots of snow on it in the winter time and it doesn't take as long to steer the dish across the satellite arc. Drawbacks to the 36VDC system is it decreases accuracy (not by much, but there is some) and the higher temperatures radiated from the power supply.

2. Next you need to have polarizer control (red, white & black wires). This is only needed if you have a skew motor on a skew able feed horn. The only time you wouldn't use these wires is if you were to install a LNBF. Note: LNB with the letter F means, the feed horn is built with the LNB as one unit and the feed horn here is controlled by the coaxial wire.

3. Then you need actuator motor wires usually Red & White for motor power. Connect both Red to Red on actuator motor wires then the other to M1 or M2. Next connect the White wire to the white motor wire at the actuator (usually this actuator motor wire is Black) then connect the other end to either M1 or M2. How do you know if the red or white go to M1 or M2? Connect up your actuator red to M1 and White to M2 if you live on the East coast. Another good way to tell if it's wired correctly is go into the setup screen of your receiver and try moving your actuator to the east and see if your antenna moves to the east. If it does your M1 & M2 wires are correct. If not then reverse the wires, and your dish should move in the correct direction. Note: these connections have high power, so take caution and always unplug the receiver if working with these wires or if you have to take them off and on.

Then you need another set of wires orange, brown, green & a bare wire usually are included on a satellite ribbon cable. Usually only three color wires are used to connect to reed switch actuators.

4. Tips

Actuators - ball screw types have a life of 7-10 years if looked after. Adding lithium grease or some type of lubricant to the screw once a year should be done. If no maintenance is done the life of an actuator will be about 2 years. If you have a sealed type actuator its life is usually 5 years.

Solder your wires -it will be easier to insert into the back of your receiver and its less likely you will ever have a loose strand that could cause a short.