User Manual

JN5148 High-Power USB Dongle (DR1131)
Reference Manual
6 © NXP Laboratories UK 2012 JN-RM-2064 v1.0
2.5 High-Power Front-End
The front-end is a Skyworks SE2431L. This means that the dongle can achieve
22dBm output power and Rx sensitivity of -100dBm. The output of the front-end
is connected to a printed antenna.
2.6 LNA Bypass
If the dongle is used in the presence of very strong signals, such as Wi-Fi, then
there will be a performance improvement by switching off the Low-Noise
Amplifier (LNA) in the front-end to stop the input stage of the JN5148 device from
being overloaded with other signals. The LNA can be bypassed using DIO1 -
driving DIO1 low will bypass the LNA.
2.7 LEDs
The two LEDs are connected back-to-back between DIOs 16 and 17.