Warwick Network Router X7220 User Manual

WARWICK WIRELESS  
LIMITED  
X7220 DUAL REDUNDANT BASE STATION  
WARWICK WIRELESS LIMITED  
THE MANOR, ASTON FLAMVILLE, LEICESTERSHIRE, LE10 3AQ ENGLAND  
 
1.0 FEATURES  
Operates on international licensed and licence free radio bands.  
RF Bands:  
147MHz to 174MHz VHF  
400MHz to 500MHz UHF  
868MHz to 920MHz UHF  
Conforms to ETSI 300-220, ETSI 300-113, ETSI 300-683, MPT1329.  
Two Independently X7200HP Radio Modems in hot standby.  
17 selectable radio channels.  
RF Power 1W and 5W  
RS232/RS485 serial Interface with baud rates of 1,200 to 38,400.  
Service and monitoring RS232/RS485 serial port.  
Remote monitoring and configuration of outstation modems.  
Addressable individually and globally.  
On-line AT commands for network control.  
Variable Data Packets and error checking mode.  
1U, 19 inch rack mounted enclosure.  
The X7220-2 Dual Redundant Base Station consists of two X7200 Radio Modems, two power supplies and an  
independent monitoring system. Only one Radio Modem is operational at any time with the other in hot standby. If  
any of the monitored parameters such as bit error rate, RF Power, RF sensitivity, Power Supply should exceed  
there pre-set limits then the second X7200 will be brought into service and the fault reported via the monitoring  
serial port and a relay contact closing. The in service radio modem will be changed automatically after a pre-set  
duty time.  
A 4K buffer memory is provided on each radio modem so that data can be passed asynchronously between the  
host and modem without the need for handshaking. The CTS output signal on the communication port can be used  
for flow control in duplex applications. The over air data speed can be configured at either 5K bits/sec or 10K  
bits/sec. This is independent of the baud rate and should be set to a lower value where possible for the best radio  
propagation.  
The set up menu of the X7220-2 can be accessed either by a PC running any terminal emulation program like  
Hyperterminal in the Accessories Section or remotely over the radio link. The set up menu is selected from the  
serial serves and monitoring port. The menu configuration is permanently stored on EEPROM.  
On-line “AT” commands can be sent to the modem to change the address configuration or RF frequency during  
normal operation so that any modem can “dial up” any other modem on the network. The repeater path can also be  
altered.  
The X7220-2 Dual Redundant Base Station is housed in a 19 inch rack and can be powered from 240V power  
source.  
 
2.0 SPECIFICATION  
ABSOLUTE MAXIMUM RATINGS  
Storage Temperature ......................................... -30 to +85 Celsius  
Operating Temperature ...................................... -10 to +55 Celsius  
DIMENSIONS X7220HP UHF 1- 5W ................ 1U 19 Inch rack  
ELECTRICAL CHARACTERISTICS  
Frequency Range  
MIN  
TYPICAL  
MAX  
DIMENSION  
MHz  
NOTE  
UK  
World  
Si  
458.500  
400.000  
147.000  
458.950  
480.000  
174.000  
MHz  
MHz  
Channels  
17  
25.0  
10.0  
Channel Separation  
Start up Time  
Modulation  
12.5  
5.0  
25.0  
30.0  
KHz  
mSecs  
With $ Selected  
110V, 240Vac  
F3D, F1D  
24  
Power Supply  
12  
30  
Vdc  
TRANSMITTER  
RF Power X7220HP  
Data Input RS232  
Data Input RS485  
Frequency Deviation  
Modulation Rate  
1
-10  
0
5
10  
5
W
V
V
KHz  
Kbps  
+/- 3.0  
3.1  
25KHz Channel  
Amps  
DC  
0.89  
10.0  
3.2  
Supply Current  
RECEIVER  
IF Frequencies  
Sensitivity  
45/455  
0.9  
MHz  
µV  
Bandwidth  
+/- 7.5  
-10  
0
-10  
KHz  
Data Output RS232  
Data Output RS485  
Carrier Detect  
10  
5
10  
V
V
V
Supply Current  
Supply Current Standby  
80  
0.005  
90  
0.007  
105  
0.01  
mA  
mA  
 
3.0 INTERFACES  
3.1 Communication Port 9 Way D Type Connector RS232/RS485  
1
2
3
4
5
ALARM CONTACT  
ALARM CONTACT  
RS232 RD RECEIVE DATA  
-VE RS485  
RS232 TD TRANSMIT DATA  
CTSI  
NU  
+VE RS485  
0V  
OUTPUT  
OUTPUT  
INPUT  
INPUT/OUTPUT  
OUTPUT  
OUTPUT  
6
7
8
9
INPUT/OUTPUT  
INPUT  
PIN 1 AL1  
PIN 2 RD  
PIN 3 TD  
PIN 4 NU  
PIN 5 OV  
PIN 6 AL2  
PIN 7 –VE  
PIN 8 CTS  
Voltage free, normally open contact  
RS232 Receive serial data from host  
RS232 Transmit serial data to host.  
Not Used  
0V common for host.  
Voltage free, normally open contact  
RS485 Bi-directional data.  
Brought low by the modem when a RF carrier is detected or the receiver buffer memory is full.  
This can be connected to RTS on the host to inhibit data from the host in duplex operations.  
RS485 Bi-directional data.  
PIN 9 +VE  
3.2 Service Port 9 Way D Type Connector RS232/RS485  
1
2
3
4
5
NOT USED  
6
7
8
9
CONFIGURATION MODE  
RS232 RD RECEIVE DATA  
-VE RS485  
RS232 TD TRANSMIT DATA  
NOT USED  
NU  
+VE RS485  
0V  
INPUT  
INPUT  
INPUT/OUTPUT  
OUTPUT  
INPUT/OUTPUT  
INPUT  
PIN 1 NU  
PIN 2 RD  
PIN 3 TD  
PIN 4 NU  
PIN 5 OV  
Not Used  
RS232 Receive serial data from host  
RS232 Transmit serial data to host.  
Not Used  
0V common for host.  
PIN 6 CON  
Configuration input. Connecting 0V to this input will send the configuration menu to the host  
when the power is applied. It is left open circuit for normal operation.  
PIN 7 –VE  
PIN 8 NU  
PIN 9 +VE  
RS485 Bi-directional data.  
Not Used.  
RS485 Bi-directional data.  
 
3.3 LED Indicators  
Eight LED’s on the front of the modem indicate the following states:  
Transmit Data 1 Green  
On when modem 1 is transmitting data.  
Receive Data1  
PSU 1  
Fail 1  
Green  
Red  
Red  
On when a RF carrier of greater than 0.9uV is detected  
On when Modem 1 power supply is good.  
On when a fault is detected in Modem 1  
Data 2  
Receive Data 2  
PSU 2  
Green  
Green  
Red  
On when modem 2 is transmitting data.  
On when a RF carrier of greater than 0.9uV is detected  
On when Modem 2 power supply is good.  
On when a fault is detected in Modem 2  
Fail 2  
Red  
3.4 Fuses  
Fuse 1  
Fuse 2  
1 Amp Fuse for modem 1 PSU  
1 Amp Fuse for modem 1 PSU  
3.5 Program Switch  
Three way switch for changing the parameters of both modem 1 and modem 2.  
Central  
Right  
Left  
Run  
Program modem 1  
Program modem 2  
3.6 Alarm Reset  
Resets alarm states  
3.7 Antenna Connections  
Two 50 ohm, N-Type Sockets.  
Antenna 1  
Antenna 2  
Socket for Antenna 1  
Socket for Antenna 2  
3.8 Power Supply  
Three pin plug for 240V mains power supply is  
4.0 OPERATION  
When power is applied to the Dual Redundant Base Station all the monitored parameters are checked along  
with the LED’s. If no faults are found modem 1 is enabled. The Duty Cycle Timer is enabled and this then cycles  
the two modems according to the time set in the service menu. ( 1 to 48 Hours)  
If a fault is detected in the operational modem then the Fault LED will light, the Fault Relay will energise, an  
error code will be set in the service menu and the alternative modem will be selected.  
A transmission is started by sending data to RD (pin 2) on the serial communication port. The operational radio  
modem places this data in the transmitter buffer memory while it checks to see if the RF. channel is free. If it is  
 
not then the data is stored in the buffer until the channel becomes free. If it is free then a preamble message will  
be transmitted so that the receiving modems can align to the incoming data.  
The modem will then transmit a repeater command byte, if set, and a transmitter address byte followed by the  
data that has been placed in the buffer memory. The transmission is terminated when a gap of two data bytes is  
detected in the incoming data stream.  
If more data is sent after a gap of two data bytes then the above sequence will be repeated.  
When the receiving modem detects the presence of incoming data it takes CTS (pin 8) low. The repeater  
command byte is decoded and the transmitter address compared to the receiver address. If they are the same  
or if the global address of 00 is decoded or if the address mode is switched off then the data will be presented at  
the serial output port TD (pin 3). At the end of the message CTS is taken high.  
If the repeater command is decoded or the repeater mode set in the configuration menu then the data will be  
stored and then re-transmitted.  
The best results are obtained from the radio modem by setting the transmission speed to the slow setting and  
the baud rate to either 4800 or 9600.  
5.0  
GETTING STARTED  
5.1  
Basic Connection on the communication and service ports  
TRANSMIT  
RECEIVE  
GROUND  
(TD)  
(RD) ON HOST TO TRANSMIT (TD) ON MODEM PIN 3  
(0V) ON HOST TO 0V ON MODEM PIN 5  
ON HOST TO RECEIVE (RD) ON MODEM PIN 2  
5.2  
5.4  
Power Connection  
240V ac  
Plug and Play  
Connect three wires to the RS232 serial port of the host terminal (0V, TD and RD) as described above.  
Connect a 240V power supply to the radio modem.  
Configure a PC in Microsoft Windows Hyper Terminal, Procom or any other terminal package with the  
following settings:  
9600 Baud  
No Parity  
1 Stop Bit  
Local Echo to OFF  
XON/XOFF to OFF  
RTS/CTS to OFF (no handshaking)  
Connect up a second modem in the same way.  
Pressing a key on one PC will transmit the character to the other. Refer to the Section 8.0 Trouble Shooting if  
this does not happen.  
 
If a second PC is not available simply power up the second modem. Configure the modem connected to the  
PC in the repeater mode with the address mode switched off. This will command the distant modem to repeat  
back the characters sent to it.  
6.0  
CONFIGURATION  
6.1  
Communication Port Menu  
The Communication Port Menu is displayed by connecting a PC configured at the Baud Rate set previously  
(Factory set at 9600).  
Use the three position Program Switch to select either Modem 1 or Modem 2  
Press the Alarm Accept button then type $ and then press the Esc key. The following menu should then  
appear.  
Repeat the above procedure with the Program Switch set to the alternative position.  
After exiting the menu return the Program Switch to the vertical position and press the Alarm Accept button.  
Warwick Wireless Ltd  
X7200-2 Radio Modem V1.0  
Warwick Wireless Ltd  
Advanced Menu  
Local  
N
N
N
N
Remote  
Local  
Remote  
Return to Main Menu  
Enable AT Instructions  
TX Priority  
Display Journal  
Packetise Data  
N
N
N
N
Advanced Menu  
Modem ID  
Baud Rate  
N
00  
9600  
N
N
01  
9600  
N
Parity  
N
N
Odd/Even  
RF Power  
RF Channel  
Key Transmitter  
RSSI  
E
5
17  
N
N
E
5
17  
N
N
Number of Retries  
Packet Size  
Logger Mode  
Enable Remote Access  
Access Remote  
05  
256  
N
N
N
05  
256  
N
N
N
Txmitter Speed  
Address Mode  
TX Address  
RX Address  
RF Sensitivity  
Restore Defaults  
S
N
00  
00  
50  
N
S
N
00  
00  
50  
N
Enable Repeater Path  
Set Repeater Path  
N
00  
N
00  
Local  
M01 M02 M03 M04 M05 M06 M07 M08  
M09 M10 M11 M12 M13 M14 M15 M16  
Exit without Save N  
Save & Exit  
N
N
Remote M01 M02 M03 M04 M05 M06 M07 M08  
M09 M10 M11 M12 M13 M14 M15 M16  
N
The menu parameters are change by pressing any of the four Arrow Keys  
Main Menu  
Advanced Menu: Pressing the right Arrow Key will display Advanced Menu  
.
Modem ID  
Baud  
A user defined ID number can be set. This is used in to set up a Repeater Chain, in the  
Remote Access Mode and with the ATA instruction.  
Baud Rate 1.2K to 38.4K can be set. Factor set at 9600 Baud  
 
Parity  
Enable Parity  
Odd/Even  
RF Channel  
Key Transmitter  
Odd, Even or No Parity can be selected .  
On of 17 RF Frequency can be selected.  
The transmitter carrier can be switched on. A distant modem can them use the RSSI bar  
graph to check the signal strength.  
RSSI  
Displays a Bar Graph of Relative Signal Strength.  
Txmitter Speed  
Address Mode  
Sets the transmission speed:  
S = 5Kbps, F= 10Kbps  
Enables Modem Address. This can be used in with the ATT Instruction to pass data to specific  
modems.  
TX Address  
RX Address  
RF Sensitivity  
Set Transmitter Address.  
Set Receiver Address.  
Sets the Receiver Sensitivity  
Restore Defaults Set Factory Defaults.  
Exit without Save Return to Modem  
Advanced Menu  
Return to Main Menu  
Enable AT Instructions  
Display Main Menu by pressing the left Arrow Key  
AT instruction are enabled. The modem will act on AT instruction present as the first  
set of characters in a data string.  
TX Priority  
Data will be transmitted when RF noise is present at the receiver.  
Used for test diagnostics.  
Display Journal  
Packetise Data  
Data is formed into packets with error detections and Acknowledgments. When the  
modem has received a full packet of data or at the end of a data string CTS is taken  
low to suspend data from the host.  
Number of Retries  
Packet Size  
Sets number of retries  
Sets the number of bytes in the packet size.  
Data will be stored in the modems memory until interrogated by a Distant Modem  
Allows distant Modem to change settings.  
Logger Mode  
Enable Remote Access  
Access Remote Modem  
Engage Rpt Path  
Set Repeater Path  
Displays settings of remote  
Enables the data repeater path entered below.  
Sets the Modem ID numbers of the required repeater path.  
 
6.2 Service Port Menue  
The Service Port Menu is displayed by connecting a PC configured at the Baud Rate set previously (Factory  
set at 9600) and pressing the $ Key followed by the Esc Key.  
Note that the monitor and control unit will not operate when the menu is displayed.  
Warwick Wireless Ltd  
X7200-2 Radio Modem V1.0  
Warwick Wireless Ltd  
Advanced Menu  
Return to Main Menu  
N
Advanced Menu  
Status  
Baud Rate  
Parity  
N
Enable AT Instructions Not Used  
DRBS OK  
9600  
N
TX Priority  
Modem of Operation  
Duty Cycle  
Not Used  
1+2  
1
Odd/Even  
RF Power (mW)  
RF Channel  
Key Transmitter Not Used  
RSSI  
E
N
Packetise Data  
Number of Retries  
Packet Size  
Enable Remote Access  
Alarm Code  
Not Used  
Not Used  
Not Used  
N
Not Used  
N
00  
Txmitter Speed  
Address Mode  
TX Address  
RX Address  
Restore Defaults  
S
Enable Repeater Path  
Set Repeater Path  
Not Used  
Not Used  
Not Used  
Not Used  
Not Used  
N
Exit without Save N  
Save & Exit  
N
The menu parameters are change by pressing any of the four Arrow Keys  
Main Menu  
Advanced Menu: Pressing the right Arrow Key will display Advanced Menu  
.
Modem ID  
A user defined ID number can be set. This is used in the Repeater Chain and also in the  
Remote Access Mode.  
Baud  
Baud Rate 1.2K to 38.4K can be set. Factory set at 9600 Baud  
Enable Parity  
Parity  
Odd/Even  
RF Power  
Key Transmitter  
RSSI  
Odd, Even or No Parity can be selected .  
Displays a Bar Graph of transmitter RF Power.  
Not used  
Displays a Bar Graph of Relative Signal Strength.  
Not used  
Txmitter Speed  
 
Address Mode  
TX Address  
RX Address  
Not used  
Not used  
Not used  
Restore Defaults Set Factory Defaults.  
Exit without Save Return to Modem  
Advanced Menu  
Return to Main Menu  
Enable AT Instructions  
TX Priority  
Display Main Menu by pressing the left Arrow Key  
Not used  
Not used  
Mode of Operation  
Selects one of the following:  
Modem 1 in continuous use,  
Modem 2 in continuous use  
Modem 1 and Modem 2 cycling on the set Duty Cycle  
Duty Cycle  
Selects the time in hours for each modem to be operational. (1 to 48 Hr)  
Packetise Data  
Number of Retries  
Enable Remote Access  
Alarm code  
Not used  
Not used  
Not used  
One of the following alarm codes are displayed:  
No fault  
Bit error rate high 1  
PSU fail 1  
RF power fail 1  
Bit error rate high 2  
PSU fail 2  
RF power fail 2  
Dual RF power fail  
Dual PSU  
00  
11  
12  
14  
21  
26  
24  
75  
73  
Engage Rpt Path  
Set Repeater Path  
Not used.  
Not used  
 
7.0 RADIO TRANSMISSION  
7.1 Radio Frequency  
Hex  
RF  
Tx RF  
RxRF  
Channel Channel  
Frequency  
Frequency  
SW5 SW4 SW3 SW2 SW1  
02H  
04H  
06H  
08H  
0AH  
0CH  
0EH  
10H  
12H  
14H  
16H  
18H  
1AH  
1CH  
1EH  
20H  
22H  
1
2
3
4
5
6
7
8
440.825 MHZ 445.825MHz  
440.850 MHZ 445.850MHz  
440.875 MHZ 445.875MHz  
440.900 MHZ 445.900MHz  
440.925 MHZ 445.925MHz  
440.950 MHZ 445.950MHz  
440.975 MHZ 445.975MHz  
440.000 MHZ 446.000MHz  
440.025 MHZ 446.025MHz  
440.050 MHZ 446.050MHz  
440.075 MHZ 446.075MHz  
440.100 MHZ 446.100MHz  
440.125 MHZ 446.125MHz  
440.150 MHZ 446.150MHz  
440.175 MHZ 446.175MHz  
440.200 MHZ 446.200MHz  
440.225 MHZ 446.225MHz  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
OFF  
OFF  
OFF  
OFF  
OFF  
ON  
ON  
ON  
OFF  
OFF  
OFF  
OFF  
ON  
ON  
ON  
ON  
OFF  
ON  
OFF  
ON  
OFF  
ON  
OFF  
ON  
OFF  
ON  
OFF  
ON  
OFF  
ON  
OFF  
OFF  
ON  
ON  
OFF  
OFF  
ON  
9
ON  
10  
11  
12  
13  
14  
15  
16  
17  
OFF  
OFF  
ON  
NOT USED FOR TELEMETRY  
ON  
ON  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
ON  
OFF  
NOT USED FOR TELEMETRY  
OFF  
ON  
ON  
ON  
OFF  
7.2. Serial Port Channel Change  
The RF channel can be changed by sending an ATX instruction to the serial port when the Address Mode has  
been selected  
ATXn  
where n is the Hex Channel Number shown in the table above.  
If the menu letter is set to A, then the RF frequency would be set to 458.525MHz when the modem is switched  
on. This can be modified to say 458.650MHz by sending the following four hexadecimal characters to the serial  
port:  
A
41  
T
54  
X
58  
0C  
0C  
No more data must be sent to the port for 20mSec while the radio sets the new frequency. CTS will be brought  
low and then high to indicate the modem is busy.  
 
7.3 Radio Propagation  
When installing a X7220 Radio Modem there are a number of factors that should be considered as they will  
affect the performance of the radio link. These are:  
Transmitter power output.  
Sensitivity of the receiver.  
Height of transmitter and receiver antenna.  
Length and type of the coaxial feeder cables to the antenna. These should be low loss RU67 type and  
kept as short as possible. As a rule of thumb the RF power is halved every 10m of antenna feeder. It is  
better to keep the signal wire long and the antenna feeder short.  
Type of Antenna used.  
Surrounding Topography.  
Interference for other networks operating on the same frequency.  
The Weather.  
7.4 Antennas  
Two antenna sockets are provided. For the best results each antenna should be mounted half a wavelength  
apart.  
8.0 TROUBLE SHOOTING  
8.1 No Data Transmission  
Check that TD and RD are connected to the 9 way D Connector correctly. This can be checked by using a  
voltmeter:  
a)  
b)  
Connect the Host to the Modem.  
With no signal present, measure the voltage between:  
0V (Pin 5) and TD (Pin 3)  
0V (Pin 5) and RD (Pin 2)  
c)  
Both should be between -5V to -15V.  
If only one is at a negative voltage then the RD and TD connections are reversed.  
8.2 No Data Reception  
If the RX LED on the receiver is not lighting at the same time as the TX LED on the transmitter then check the  
RF frequency on both modems to see if they are set to the same RF frequency.  
If the RX LED is lit when no data is being transmitted then there might be another user on the channel. Select an  
RF channel the RX LED is not lit.  
If RX LED is flickering on all RF channels then look for a source of local interference such as a switch mode  
power supply or a computer in close proximity.  
If there are other radio modems or radio telemetry systems operating on adjacent frequencies on the same site  
then the antenna on your system must be mounted at least 3m away from the antenna of the other systems.  
This will prevent the transmitter of one system interfering with the receiver of the other.  
 
8.4 Radio Path  
The radio path can be tested by configuring the transmitting modem to the Repeater Mode.  
Exit the configuration menu and transmit a character from the dumb terminal  
This will be echoed back from the distant modem if there is a good transmission path.  
8.5 HELP LINE NUMBER + 44 (0) 1455 233616  
9.0 WARNING  
Warwick Wireless Limited reserve the right to change the design or specification of the X7220 Radio Modem  
without notification. In addition Warwick Wireless Limited take no responsibility for the installation and operation  
of the radio modem.  
All documentation and software are copyright.  
Doc:  
DS163 Version 1.2  
 

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