Quick Test--No Power Amplify Adjustable Gain Preamplifier (CM-7777HD)

Quick Test for No Power or Lights Cannot Test Voltage

1. Remove the CM7777HD from your system.

2. Connect the USB power cable to the power adapter to the side of the CM-7777HD labeled USB PWR IN(you must remove the rubber weather plug).

3. Does the Green and/or Red light come on?

4. Pressing the gain select button, on the side of the Amplify will allow you to switch through the gain settings and light turns from green to red, or from red to green.

5. If yes to #4, then you know the Amplify is getting power.

Now test it with the power inserter.

1. Connect the USB power cable to the power adapter to the POWER IN port on the Power Inserter.

2. Connect a short coax cable to the power inserter TO AMP port.

3. Connect the other end of that short cable to the OUT TO TV port on the CM-7777HD.

4. Does the Green and/or Red light come on?

5. Pressing the gain select button, on the side of the Amplify will allow you to switch through the gain settings and light turns from green to red, or from red to green.

6. If yes to #5, then you know the Amplify is getting power.


Quick Test for No Power Can Measure Voltage

If you've installed the CM-7777HD and it does not appear to function--If you know how to measure voltage, please follow these instructions:

1. Remove the CM-7777HD from the system.

2. Connect the USB power cable to the power adapter to the POWER IN port on the power inserter.

3. Connect a short coax cable to the TO AMP port on the power inserter .

4. The other end of that short coax cable should read about 5VDC from the center conductor to the connector nut.

5. If you do get voltage at the end of the that short coax cable, connect that to the Amplify OUT TO TV port

6. Does the Green and/or Red light come on?

7. Disconnect the USB power cable from the power inserter POWER IN port.

8. Connect the USB power cable to the Amplify USB PWR IN port(must remove the rubber weather plug on the side of the Amplify).

9. Does the Green and/or Red light come on?

10. Pressing the gain select button, on the side of the Amplify will allow you to switch through the gain settings and light turns from green to red, or from red to green.

11. If yes to #10, then you know the Amplify is getting power.

 

CM-7777HD Loss of power will attenuate signals by ~40dB

The CM7778 Will allow Medium and High signal strength to pass. Do not have the dB figure

The CM7777 Will only allow very strong signals to pass.

Have more questions? Submit a request