To setup you Amped extender with spectrum router you need to Follow these steps :
At first you need the password of spectrum router that help you in setting up your extender.
Plugged in your extender nearby your router and then wait for 3 to 5 minutes .
Press the WPS button on your Amped Extender for 5 seconds and within 1 minute press the WPS button on your spectrum router for 5 seconds and wait for 5 minutes .When you see all solid light on your extender then go to your computer or mobile phone and then go to the wifi over there. Where you see spectrum _RE network or Amped extender in the list.
Please connect your you devices with this network and put you spectrum router password ( If it ask for the password) . once you connected with that network then check internet is working fine, if it is then your extender is configured properly. Now if you want you will able to move your extender where ever you wanted.
You can setup your TP-link extender using the WPS button.
Press and hold the WPS button on the TP-link Extender for 5 seconds. The WPS LED on the front should blink.
Within 2 minutes, press the WPS button on your wireless router.And wait for at least 2 minutes while the extender connects to your existing wireless network.If successful, the WPS LED on your Extender turns solid green