User's Manual

SK202 User manual 1 of 7
User Manual
SK202 – Contactless GbE
1. Overview
This document guides users how to use the SK202A/B modules. The pair of
modules transmits Gigabit Ethernet signals at a distance of several centimeters in a
contactless way. SK202 opens a new scene for network connection applications. This
module integrates a network PHY chip and ST60 A2, a millimeter wave wireless
transceiver chip, which can be simply connected to the existing Ethernet replacing a
network cable. Please note is that both SK202 modules must at the same speed mode
as described in section 3 of this document.
2. Connection method
Figure 1. Schematic diagram of using SK202 to connect IP camera
SK202 only needs to be connected to the network and power supply, but it should
be noted that the network negotiation rate of the PC side and the router side are the
same. If the PC side is a gigabit network, the rate automatically negotiated with the
SK202A will be 1G. Then the rate on the router side must be 1Gbps, and the router
will automatically negotiate the rate with the SK202B to be 1Gbps. The network will
be connected, working on Gigabit Ethernet.
Assuming that the router has a rate of 100M, SK202B will negotiate a rate of 100M
with the router. At this time, the rate of SK202A is 1Gbps, and the rates of SK202A/B
are inconsistent, and the network will not work. Please refer to section ‘Controlled
Auto-negotiation’ below.
The category of the cables used to connect the modules to the rest of the network
must be compatible with the rate that will be negotiated. 10/100 or 1000Mbps.Please
note that SK202A and SK202B must be used in pairs, and the golden antenna part
needs to be aligned with a distance of about 3cm.