User's Manual Part 3

ManualsBrandsGE MDS ManualsElectronics2.4 GHz TransNet

18 TransNET OEM 2.4 Integration Guide MDS 05-xxxxA01, Rev. 01

4.0 EVALUATION BOARD DOCUMENTATION

This section contains an assembly drawing and parts list for the OEM

Evaluation Board. In addition, a separate foldout schematic of the Board is

included at the back of this manual. Board documentation is provided to assist

integrators who need to create compatible interface circuitry between the

OEM transceiver and host equipment.

NOTE: The foldout schematic may also be accessed from the TransNET Support

Package CD, or from our website at: www.microwavedata.com.

4.1 Assembly Drawing

Invisible place holder

Figure 14. Evaluation Board Assembly Diagram

4.2 Parts List

Table 6 lists the electronic components used on the Evaluation Board.

Table 6. OEM Evaluation Board Parts List

Ref. Desig. Part Description

CR1 DIODE, SOT23 SMALL SIG 914 5D

CR4 CR5 CR6 RECTIFIER, 30V B13

CR2 CR3 DIODE, SCHOTTKY POWER, SMT, SNGL, UPS840

Q1 Q2 TRANSISTOR, SOT23 NPN 6429 M1LR

R10

C26

C20

C18

C19

TXD

GND

R11

CR1

C23

C24

C10

C30

CTS

REG_PWR

C13

ALARM

C29

C11

C31

CR2

C16

R12

RTS

CR4

CR5

R15

C21

C17

R13

C14

C12

DIAG_RXD

DIAG_TXD

GND

SLEEP

CR3

FH1

R14

C15

C22

C25

RXD

UNREG_PWR

SHUTDN

DCD

LED

CR6

Summary of content (15 pages)

PAGE 1
4.0 EVALUATION BOARD DOCUMENTATION This section contains an assembly drawing and parts list for the OEM Evaluation Board. In addition, a separate foldout schematic of the Board is included at the back of this manual. Board documentation is provided to assist integrators who need to create compatible interface circuitry between the OEM transceiver and host equipment. NOTE: The foldout schematic may also be accessed from the TransNET Support Package CD, or from our website at: www.microwavedata.com. 4.
PAGE 2
Table 6. OEM Evaluation Board Parts List (Continued) U4 U5 IC, LINEAR SC70-5 COMPARATOR SNGLE LMV33 U1 IC, IN'FACE SSOP28 RS-232 TXVR SP3238E U3 IC, IN'FCE 20PIN TSSOP DRIVER SP3222 U2 IC, SWITCHING REG'R ADJ.4.5A LT1374HVIR K1 K2 K3 RELAY, DPDT R10 RESISTOR, CHIP 0603 1/16W 5% 2.2K R4 R5 R13 R14 RESISTOR, CHIP 0603 1/10W 1% 10K R12 RESISTOR, CHIP O603 1/10W 1% 100K R7 R9 RESISTOR, CHIP 0603 1/10W 1% 1.5K R11 RESISTOR, CHIP O603 1/10W 1% 1.82K R3 RESISTOR, CHIP 0603 1/10W 1% 22.
PAGE 3
Table 6. OEM Evaluation Board Parts List (Continued) 4.3 J2 CONN, HEADER, PC MOUNT .078, DUAL, 16 PIN Samtec TW Series, Part No: ASP 103812-01 (Mates with J3 on the OEM radio transceiver) J3 CONN, TERM STRIP, 5MM PCB J4 CONN, TELE JACK 6POS 6CON RT A SMT W/F J5 CONN, D-SUB, PCB RCPT 90 DEGREE, 9 PIN Evaluation Board Fuse Replacement The Evaluation Board is protected by a 2 ampere fuse. The fuse can be blown by an over-current condition caused by an internal failure or over-voltage.
PAGE 4
5.0 TRANSCEIVER MOUNTING This section provides information for mounting the OEM transceiver in a host device. The module need only be protected from direct exposure to the weather. No additional RF shielding is required. 5.1 Mounting Dimensions Figure 15 shows the dimensions of the transceiver board and its mounting holes. If possible, choose a mounting location that provides an unobstructed view of the radio’s LED status indicators when viewing the board from outside the host device.
PAGE 5
At remote sites and in many point-to-point systems, a directional Yagi antenna (Figure 17) is generally recommended to minimize interference to and from other users and to maximize range. For systems operating in a very short range environment, small, flexible whip antennas may also be supplied. Such antennas are available for direct connection to the transceiver module, or for exterior mounting with various lengths of feedline. Figure 16.
PAGE 6
.0 EIRP Compliance Check IMPORTANT: To comply with FCC and Industry Canada rules, the effective isotropic radiated power (EIRP) of an OEM transceiver installation must not exceed 36 dBm. Transceiver modules are shipped from the factory with an RF output setting of +27 dBm. This setting is password-controlled and may not be changed by unauthorized persons.
PAGE 7
.1 Antenna Aiming For optimum performance of directional antennas (yagis), they must be accurately aimed in the direction of desired transmission. The easiest way to do this is to point the antenna in the approximate direction, then use the remote radio’s RSSI command (Received Signal Strength Indicator) to further refine the heading for maximum received signal strength. In an MAS system, RSSI readings are only meaningful when initiated from a remote station.
PAGE 8
7.6 Baud Rate Setting The default baud rate setting is 19200 bps to accommodate most systems. If your system will use a different data rate, you should change the radio’s data interface speed using the BAUD xxxxx abc command (Page 42). It should be set to the highest speed that can be sent by the data equipment in the system. (The transceiver supports 1200 to 115200 bps.) 7.7 Radio Interference Checks The radio operates in eight frequency zones.
PAGE 9
8.2 Establishing a Tail-End Link DCE DB-25 DCE 16-pin header (J3) RXD 3 10 TXD TXD 2 14 RXD GND 7 5 GND RTS 4 If required. 16 CTS TransNET OEM Remote Transceiver (DEVICE CTS KEY) MDS x710 Series Remote Transceiver (or device requiring keyline) A tail-end link can be used to bring an outlying remote site into the rest of an MAS network. Figure 5 on Page 5 shows a diagram of this type of system.
PAGE 10
Simple Extended SAF Network Figure 19 depicts a two-level network utilizing a single Master (M) and an Extension (X) radio. In this network, messages directed to Remotes in the “K” sub-network, will be relayed through Extension radio Xj,k to the K-Remotes. Any response from a Remote in sub-network “K” will pass back through Extension radio Xj,k to the Master Mj. Radios in sub-network “J” operate on the same set of frequencies and sub-network “K” but with a different radio-frequency hopping pattern.
PAGE 11
Invisibleplaceholder MJ Sub-Network J RJ RJ X J,K RJ Sub-Network K X K,L RK RK Sub-Network L RL RL RL Figure 20. Extended SAF Network Networks: J, K, L Retransmission and ARQ operation Functionally, the sub-network side of an Extension behaves like a corresponding connection between a master and a remote. When an Extension is using its “master personality” it sends acknowledgments and performs unconditional retransmissions based on its REPEAT count.
PAGE 12
The Extensions are single radios which serve as bridges between adjacent sub-network levels. Extensions will undertake a “remote” personality in one timeslot, and a “master” personality in the alternate timeslot and provide communications with associated Remotes downstream.
PAGE 13
Table 8. Configuration Parameters for SAF Services Network Master Radio (Continued) Parameter Command Description Extended Address XADDR A number between 0 and 31 that will serve as a common address for radios that synchronize directly to this master. Typically, the Master is set to zero (0). Details page 51 Store and Forward Mode SAF ON Enables store and forward capability in the network. Details page 49 Table 9.
PAGE 14
Table 10. Configuration Parameters for SAF Services Remote Radio(s) Parameter Command Description Operating Mode MODE R Set the radio to serve as a Remote station Details page 45 Network Address ADDR Details page 40 Primary Extended Address XPRI Extension Map XMAP Details page 51 Details page 51 Extension Received Signal Strength Indicator 8.4 XRSSI Details page 51 A number between 1 and 65,000 that will serve as a common network address or name.
PAGE 15
It is important to note that power consumption will increase somewhat as communication from the master station degrades. This is because the radio will spend a greater period of time “awake” looking for synchronization messages from the master radio. In order for the radio to be controlled by the Sleep Mode pin, the radio must be set to SLEEP ON. See “SLEEP [ON, OFF]” on Page 50 for more information. Sleep Mode Example The following example describes Sleep Mode implementation in a typical system.