User Manual

Overview
Chapter 2
Overview
The HM500 WHDI Video Source Unit (VSU) is designed to modulate and transmit downstream video and
audio content over the wireless medium and receive a control channel over the wireless upstream. The
modulation uses 18MHz bandwidth and is carried over the 5GHz unlicensed band. Figure 1 displays a
block diagram of the HM500. The inputs to the VSU are digital uncompressed video, digital audio and control,
all via the WHDI connector. I`t has a MIMO design of four wireless output channels and a slow rate data
input wireless channel. The MiniMAC uC is responsible for the control and the management.
Analog
MUX
(RSSI/
PADET)
VIDEO
MAX2828
PA
5Ghz Tx
Audio
GPIO
RESET
AMN2110
WHDI
TM
Baseband Transmitter
MAX2828
PA
5Ghz Tx
MAX2828
PA
5Ghz Tx
Interrupt
Clock
SPI
20MHz
Int uC Reset
PA
MAX2828
5Ghz Tx&
Uplink
Control
Two-Wire
uC
MiniMAC
EEPROM
Clock 40M
40M
CLOCK
GEN.
Figure 1: HM500 Block Diagram
Version 1.0
3