Click to enlarge
3G CDMA 1xevdo 450MHz Rev.A Mini PCI Express Embedded Module
1.1 Introduction:
KHD-KM450 EVDO PC Embedded Module (hereinafter referred to as the KM450) is a Wireless Wide Area Network (WWAN) PC module based on the CDMA2000 1x, the CDMA2000 1xEV-DO Rev. 0, and the CDMA2000 1xEV-DO Rev. A protocols. It is a multi-mode wireless terminal for business professionals. In addition to messaging services, the KM450 provides high-rate packet data services, supporting wireless downloading at a speed as high as 3.1 Mbps and uploading at speed as high as 1.8 Mbps.
The KM450 supports the following standards:
CDMA2000 1x
CDMA2000 EV-DO Rev 0(EV-DOr0)
CDMA2000 EV-DO Rev A(EV-DOrA)
The KM450 provides the following services:
CDMA2000 1x packet data service
EV-DOr0 packet data service
EV-DorA packet data service
CDMA2000 1x short message service (SMS)
CDMA2000 1x PC voice(Optional)
The KM450 can be connected to a PC via the Mini PCI Express interface. In the service area of the CDMA2000 1x, EV-DOr0 or EV-DorA network, you can surf the Internet, send messages and emails, telephone, and receive messages/emails
cordlessly. The KM450 is fast, reliable, and easy to operate. Thus, mobile users can experience many new features and services with the KM450. These features and services will enable a large number of users to use the KM450 and the average
revenue per user (ARPU) of operators will increase substantially.
1.2 Key Features
The functional features of the KM450 are as follows:
l Supporting 450 MHz frequency band
l Supporting the CDMA2000 1x standard
l Supporting the CDMA2000 1xEV-DO Rev. 0 standard
l Supporting the CDMA2000 1xEV-DO Rev. A standard
l Supporting receiving diversity
l Supporting R-UIM/ROM-UIM outside
l Supporting messaging
l Supporting high-rate packet data services
l Supporting PC Voice(Optional)
Table 1-1 lists the key features of the KM450.
Table 1-1 Key features of the KM450
Item | Description | |
Standard | CDMA2000 1x RTT CDMA2000 1xEV-DO Rel. 0 CDMA2000 1xEV-DO Rev. A | |
Data speed | Uplink: up to 1.8 Mbit/s Downlink: up to 3.1 Mbit/s | |
Frequency Scope | Block A | Tx: 452.500Mhz - 457.475Mhz Rx: 462.500Mhz - 467.475Mhz |
Block B | Tx: 452.000Mhz - 456.475Mhz Rx: 462.000Mhz - 466.475Mhz | |
Block C | Tx: 450.000Mhz - 454.800Mhz Rx: 460.000Mhz - 464.800Mhz | |
Block L | Tx: 410.000Mhz - 414.475Mhz Rx: 420.000Mhz - 424.475Mhz | |
Receiving Sensitivity | CDMA2000 1x RTT | compliant with 3GPP2 CS0011-C: excelled - 104 dBm |
CDMA2000 1x EV-DO | compliant with 3GPP2 CS0033-A: excelled - 105.5 dBm | |
Interfaces | Mini PCI Express 1.2 interface (USB 2.0 Full Speed) | |
Support OS | Windows 2000/XP/Vista/7 Linux 2.6.18 or later versions | |
Maximum power consumption | <3.3 W | |
Working voltage | 3.0~3.6V | |
Dimensions | 51.0mm×30.0mm×5.0mm | |
Weight | About 8 g | |
Operating Temperature | -20°C to +55°C | |
Storage Temperature | -40°C to +85°C | |
Relative humidity | 5%–95% | |
1.3 Hardware Overview
The hardware of the KM450 consists of three sections: baseband section, power
management (PM) section, and radio frequency (RF) section. External interfaces
include the antenna interface and the Mini PCI Express interface.
1.3.1 Hardware Logic Block Diagram
The KM450 is completed on a single-board. Figure 1-2 shows the hardware
functional block diagram.
Figure 1-2 Hardware functional block diagram
The circuitry of the KM450 consists of three sections: baseband section, RF section,
and PM section.
l The baseband section includes the baseband processor and DDR SDRAM/flash MCP. It implements baseband signals processing, wireless protocols, and management of various peripheral devices.
l The RF section includes the RF transceiver, PA, antenna switches, duplexer, and antenna interfaces, and it supports receive diversity.
l The PMU section includes PM Part and DC-DC circuits, providing the power supply and power management for the whole module.
1.3.2 External Hardware Interfaces
1. Antenna interface
The KM450 has a main antenna connector and an auxiliary antenna connector.
2. Mini PCI Express interface
The interface of the KM450 is a standard Mini PCI Express interface. The KM450 consists of several major signals, as shown in the following figure.
Figure 1-3 Mini PCI Express identification
l RUIM interface: The RUIM interface provides the interface for a RUIM card. The RUIM card can be inserted into the PC.
l USB interface: This module can operate at USB low-speed (1.5 Mbits/sec) and USB full-speed (12 Mbits/sec). It is compliant with USB 2.0 Specification, and available from www.usb.org.
l Because there is not a separate USB-controlled voltage bus, USB functions implemented on KM450 which are expected to report as self-powered devices.
l Auxiliary signals: The auxiliary signals provide some other functions.
l Power sources and grounds: The PCI Express Mini Card provides two power sources, including the one at +3.3 Vaux (3.3Vaux) and the one at 1.5 V(+1.5V). The KM450 uses the +3.3 voltage as the power supply.