My RTD 155 is installed in my motorhome. The FM reception is not good. I want to install a 75ohm cable from the unit to my Winegard RV antenna, but the plug on the back of the unit does not fit the F plug. I bought a PAL adapter from Radio Shack but it is too small to fit over the plug (protuberance?) on the back of the unit. Is there a larger PAL adapter? If not, how do I hook up a 75ohm cable to it?
You need a simple Male RF adapter to a 300 ohm connection. Go here to see the picture http://www.showmecables.com/productDetailsPopUp.asp?idproduct=1889 and print it out and take it to radio shack and show the salesman there. they will have this part for you for sure. Good Luck
Posted on Jul 15, 2007
Get the adapter and it will work.
Ok, tell me what the connection your trying to connect to on the back of the RTD155 looks like and what type of cable are you trying to connect to it. I must be missing something here?
I cannot find a picture of this thing, can you post what it looks like please?
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INSTALLATION
Channel Master by PCT indoor antennas are designed to provide optimum reception of
UHF / VHF and FM signals. These antennas have 75 ohm outputs, which allow simple,
hassle-free connections to today's newer TV sets that have 75 ohm F type connector
inputs.
Simply attach one end of the supplied 6' cable with F connectors to the output of the
antenna (Fig.1). Attach the other end of the cable to the input of the TV set or VCR
(Fig. 2). Some adjustment of the antenna might be necessary for optimum viewing.
Model CM-4030 includes a built-in amplifier and separate power supply.
1. Follow the same steps as above for antenna to TV / VCR hookup. Note : Model
CM-4030 also allows for two set / VCR hookups with its unique dual output feature.
2. Insert the power injector into the back of the antenna (Fig. 3). Plug in the power
transformer to the closest electrical outlet (Fig. 4).
Google 4030 Channel Master Instruction Sheet for the PDF File with the diagram.
Fig 2a
Fig 3 Fig 4
prohibido por ley.
TV
Fig 1 VCR
Fig 2
Fig 2a
Fig 3 Fig 4
The connection standard requires that the pins are utilised in the following manner:
Hope this is useful.
PIN
USE
LEVEL / IMPEDANCE
1
Audio Output (R)
0.5V / 1K-ohm
2
Audio Input (R)
0.5V / 10K-ohm
3
Audio Output (L)
0.5V / 1K-ohm
4
Audio Ground
--------------------
5
Blue Ground
--------------------
6
Audio Input (L)
0.5V / 10K-ohm
7
Blue
0.7Vp-p / 75ohm
8
Status (CVBS)
L:0-2V H:10 - 12V / 10K-ohm
9
Green Ground
--------------------
10
Data D2B (Inverted)
--------------------
11
Green
0.7Vp-p / 75 ohm
12
Data D2B
--------------------
13
Red Ground
--------------------
14
D2B Ground
--------------------
15
Red
0.7Vp-p / 75 ohm
16
RGB Status/Fast Blanking
L:0-0.4V H:1-3V / 75 ohm
17
CVBS Video Ground
--------------------
18
RGB Status Ground
--------------------
19
Composite Video Output
1V / 75 ohm
20
Composite Video Input
1V / 75 ohm
21
Case Shield
---------------------
A 21 pin SCART cable with all pins connected is wired as per the following diagram:
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Techman: Thanks for your help; however, the plug, protuberance, whatever it is called on the back of the unit to which the coaxial cable must connect is too large for an F connector or for the "F to Pal" adapter that I purchased from Radio Shack. In fact, the plug seems to be exactly the same diameter as the F plug. Likewise, the RF part of the adapter that you suggest is too small to fit over the plug in back. Furthermore, I can see no way to attach the prongs of the 300 ohm might attach to. The owner's manual has a photo of the plug on the back of the unit, and it appears to be a PAL connection, but the plug adapter is too small to fit over the plug. Any ideas? Bud.
Techman: I owe you an apology. The RF to 300 adapter works after all. My problem was that there is so little space behind the unit in my motorhome that I couldn't get my far enough behind it to push the adapter on squarely. I finally removed the unit (a real task), and the unit fit perfectly. I hooked up the 300 ohm leads with a 75 ohm adapter, hooked that up to my motorhome antenna, and the FM is greatly improved. Thanks very much for your help. Bud.
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