Page 1
RM96xx
Radio Modem Series
User Manual
R
D
T
Page 2
1
Table of Contents
Main features and brief description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Additional Information on Power Supplies/Antennas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Modes of Operation
Primary Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Repeater Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Hayes Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Serial Control Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
User Control & Configuration
User Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table of User Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Explanation of Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Timing Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Serial Port Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Softward Release Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
RDT does not assume any responsibility for the use of the products described. No product patents are implied
and RDT reserves the right to change the said products without notice at any time.
Page 3
Brief Description
2
Features
● UHF FM Synthesised Radio Transceiver
● Transparent serial data transmission
● RS-232 & RS-485 Serial Data Interfaces
● 6 modes of operation including
Asynchronous, Modem and Repeater
The RM96xx Series of Radio Modems are a range of UHF multi-channel transceivers, incorporating a GMSK
baseband modem and RS232/RS485 serial data interfaces.
As with all RDT Radio Modem products, the RM96xx provides fully transparent operation regardless of the
serial data protocol. Over-air speeds up to 16Kbps are achieveable and serial data can be input at various baud
rates up to 19,200bps.
Access to all user configurable parameters is possible using the on-board switches and operational status is
easily monitored using the standard LED indicators.
Models currently available include the RM96xx Modem Card for OEM customers, the RM96xxB Aluminium
housed model and the RM96xxE & EX, IP67 housed units with integral power supplies.
A brief summary of features includes addressing capability, user selectable RF power level and frequency of
operation, built-in repeater facility, Forward Error Correction (FEC), Automatic Repeat Request (ARQ),
MODBUS compatibility (ASCII & RTU) and Hayes Compatible mode.
The RM96xx utilises RDT’s unique multi-channel UHF transceiver which is available as a separate module to
OEM customers wishing to take advantage of the superior design, built quality and performance for which our
products have a world-wide reputation.
Applications include Alarm Systems, Data Acquisition, Remote Metering, Remote Control Systems,
Warehousing and Despatch, SCADA, Security Systems, Video Surveillance Systems, Telemetry, Traffic
Information and Control Systems etc.
The RM96xx products carry the CE mark and meet various UK, European and world-wide radio approval
specifications including ETS 300 113, ETS 300 220 AND MPT1329. Details are available upon request.
● User selectable RF channel, Address
and Tx power level
● LED indicators for radio functions, signal
strength and serial line status
● Forward Error Correction (FEC)
● Automatic Repeat Request (ARQ)
RM96xx
Radio Modem Series
User Manual
Page 4
3
Additional Information
Power Supply
The RM96xx board requires a 12V d.c. power supply
which should be well filtered and regulated. Onboard voltage regulator circuits will maintain a
constant supply of voltage to the radio and logic
circuits, however, excessive noise, fluctuations and
interference on the d.c. supply may cause loss of
data.
Antenna Selection
The antenna should be designed for use at the
operating frequency in the 406-470MHz UHF
frequency band. The radio range achieved will be
dictated by the land topography between the nodes.
Ranges quoted below are for guidance only,
distances vary according to terrain and obstructions.
In many situations increasing atenna height can
greatly improve signal strength, and the RSSI test
mode can be used for signal strength indicated.
Yellow LEDs indicate minimum acceptable signal,
green LEDs indicate excellent signal strengh.
Coaxial feeder cable is available in many forms, 50
ohm impedance cable with low loss should always
be used, note that 3dB of feeder loss will reduce
radiated power by half. In some applications where
maximum range is required, directional antennae
with gain can compensate for feeder loss provided
that the maximum radiated power limit is not
exceeded.
When low loss RG213/U or UR67 coaxial cables are
employed N-type RF connectors should be fitted in
conjunction with one of the Antenna Bulkhead Cable
Kits to convert from the SMA of BNC socket on the
radio module to N-type RF connectors on the
coaxial cable.
Antenna Type Range Coverage Gain Mounting Applications
1
/2-Wave Whip 1 km Omnidirectional -3dB Enclosure Mounted Short range general use
End-fed Dipole 10 km Omnidirectional 0dB Pole Mounted Medium range general use
8 Element Yagi 20 km Directional (40°) 10dB Pole Mounted Long range, directional
Antenna Types
Page 5
4
Primary Modes of Operation
Asynchronous Mode
In Asynchronous Mode data arrives through either the RS-232 or RS-485 serial port and is placed in the data
buffer. As soon as data is detected in the buffer, the transceiver is switched to transmit mode. Once switched
to transmit there will be a short delay (10mS), while the synthesiser locks and the transmitter reaches operating
power. The data buffer is then inspected to determine the number of bytes available for transmission in this
data packet. A small amount of header information (used internally by the receiving RM96xx) and the data
bytes are then transmitted along with a 16 bit CRC. After this packet has completed transmission the data buffer
is inspected to see if more data has arrived. If more data is available then the transmission process is
repeated. When no more data is available the transceiver is switched to receive mode.
When an RM96xx header block containing the appropriate modem address, size of data packet and valid
CRC is received then the number of bytes specified in the header block will be read into the data buffer and
then output to the RS-232 or RS-485 serial port.
Point to point, multidrop and repeater configurations are feasible in this mode.
Synchronous Mode
In Synchronous Mode timing constraints are imposed on the serial data. This mode is designed to be used
in systems such as RTU MODBUS where the end of a message is determined by a gap in the serial data
stream of 3.5 characters or more.
Data arrives through either the RS-232 or RS-485 serial port and is placed in the data buffer until a gap of
3
1
/2characters is detected in the serial byte stream. At this point, no more serial data can be accepted until
the stored data has been transmitted. The transceiver is then switched to transmit and the contents of the
data buffer with a header block are sent as a single data packet. The transceiver is then switched to receive
mode.
Following reception of a valid header block for synchronous mode, the data packet received is placed into
the data buffer. When all the data is in the buffer it is output synchronously to the serial port to ensure no gaps
appear in the serial data stream.
Point to point and multidrop configurations are feasible
in Synchronous Mode.
Modem Mode
In Modem Mode the transceiver is controlled with the CTS/RTS control line. To transmit, the CTS input must
be taken high. When the synthesiser has locked
and the transmitter reached operating power the modem
will
set RTS output high. This signals the user that the RM96xx is now available to accept serial data. Once
RTS is raised, the RM96xx will operate in accordance with Asynchronous mode with the exception that the
transceiver will stay in transmit until the user lowers CTS.
Note: The diagrams of pages 16 & 17 provide timing information on each of the above modes.
Page 6
5
Repeater Modes
From time to time it is necessary to include a repeater in a system for the following reasons:-
• To extend range
• To circumvent obstacles
• Achieving a radio link where circumstances dicate the use of less efficient antennas
A system using a repeater is inherently more complex than one without and it is recommended that first time
users may wish to discuss the details of system operation with their modem supplier.
Repeater Modes
The RM96xx series modems have three repeater modes, Standard, Repeat All and Automatic Repeat.
These are selected by the normal programming method with the rotary switch in position 3 and using DIL
switches 4, 5, 6 and 7.
Standard Repeater
In the Standard Repeater mode all RM96xx
units within the system must be set to the same address. The base
unit is configured as a standard unit, the repeater is set to 'Standard Repeater' and the remote units must be
set to 'Repeater Remote' (see page 14 for switch settings).
The base unit transmits data with a standard header block. To avoid unneccesary interference and the
possibility of the remote units interpreting the base station transmissions, the remote units will not accept
messages with the standard header block.
When the repeater receives data from the base unit, the header block is changed prior to
re-transmission so that the remote units will recognise the transmission.
In the same manner, a remote unit can only transmit data back to the base station via the repeater which
changes the header block to the standard acceptable by the base unit.
Standard Repeater
PC
User
Equipment
User
Equipment
User
Equipment
User
Equipment
Serial
I/O
Serial
I/O
RM96xx
Address 0
RM96xx
Standard Repeater
Address 0
RM96xx
Repeater Remote
Address 0
Serial
I/O
RM96xx
Repeater Remote
Address 0
Serial
I/O
RM96xx
Repeater Remote
Address 0
Serial
I/O
RM96xx
Repeater Remote
Address 0
Notes
An RM96xx in Standard Repeater Mode will receive data from normal RM96xx units
or from Repeater Remote Units providing they are set to the same address.
A normal RM96xx unit will not receive messages directly from a Repeater Remote.
A Repeater Remote unit will not receive messages directly from a normal RM96xx.
Page 7
6
... repeater modes continued
Repeat All Mode
PC
User
Equipment
User
Equipment
User
Equipment
User
Equipment
Serial
I/O
Serial
I/O
RM96xx
Serial Control Mode
(Variable Address)
RM96xx
Repeat All
RM96xx
Repeater Remote
Address 1
Serial
I/O
RM96xx
Repeater Remote
Address 2
Serial
I/O
RM96xx
Repeater Remote
Address 3
Serial
I/O
RM96xx
Repeater Remote
Address 4
Notes
An RM96xx in Repeat All Mode will receive data from normal RM96xx
units or from Repeater Remote Units regardless of their address.
A normal RM96xx unit will not receive messages directly from a
Repeater Remote.
A Repeater Remote unit will not receive messages directly from a
normal RM96xx.
Date sent from the Serial Control RM96xx will only be output at the
Repeater Remote which is set to the same address.
Notes
An RM96xx in Automatic Repeater Mode will Transmit on its own address and receive on an address 1
higher or 1 lower. i.e. Unit B (above) will transmit with address of ‘1’. Messages from other Automatic
Repeaters will be accepted if their address is ‘0’ or ‘2’. All units must be on the same RF channel.
After transmitting, an Automatic Repeater will be ‘deaf’ for a pre-defined time period:- (16k RF
rate=50mS, 8k RF rate=100mS, 4k RF rate=150mS).
This is to prevent unit A hearing the onward tranamission from unit B etc.
Repeat All
Repeat All mode is similar to the Standard Repeater mode with the exception that all valid RM96xx
messages are repeated regardless of their address. This permits the use of a base station operating under
Serial Control and enables the master to communicate with a specific remote modem rather than
broadcasting to all.
Automatic Repeat
Automatic Repeat mode allows a message to be automatically transmitted along a ‘chain’ of up to 255
repeaters. Each repeater has its address set 1 above its predecessor in the chain. Each unit ‘listens’ for
messages from units with addresses 1 below or 1 above their own. (For example unit 6 will listen for
messages from 5 and 7). When it receives a message from the higher of lower address it will re-transmit it
on its own address. Having transmitted it will disable its receiver for approximately 50mS to prevent reception
of the onward transmission.
A received message is repeated and output to the selected serial port at the same time. A message input at
the serial port of any modem in the chain will travel along the chain in both directions.
Customers wishing to use this mode of operation should contact their distributor or RDT technical support
for system planning assistance
.
User
Equipment
Automatic Repeater
PC
Serial
I/O
RM96xx
Auto-Repeater
Address 0
RM96xx
Auto-Repeater
Address 1
RM96xx
Auto-Repeater
Address 2
Serial
I/O
RM96xx
Auto-Repeater
Address 3
A
B
C
D
Page 8
Introduction
Selecting Serial Control mode permits various Radio Modem parameters to be interrogated and modified
via the serial port instead of using the on-board DIL switches.
In some applications the user equipment takes care of addressing in which case an RM96xx operating in
one of the standard modes can be utilised to provide a straight forward transparent serial data link.
In applications where the user equipment is not addressable, the address of the base station RM96xx will
need to be changed to enable communications with remote units that are set to unique addresses. In
applications such as this, Serial Control provides the solution.
Operational Overview
A typical configuration is detailed in Fig.1 above. Basically, in a polled system with one master
unit and several remote units the system operates as follows;
Each remote unit is a standard RM96xx with a unique address and/or RF channel set via the
on-board DIL switches.
The master unit is set to operate in Serial Control Mode. It receives ASCII text strings from the host in a
simple format which specify or interrogate it's address or RF channel number.
The master unit responds to the host with a reply string confirming the action or containing the value of the
address/RF channel number currently set.
Serial data is transferred until a command is received to change to another address or RF channel.
In this configuration the master station can only listen to one remote station at a time. This is not a problem
when using a polling system because the radio modems communicate with each other in pairs.
Global Addressing
Global addressing may be selected from software versions 2.4 (RM9600) and 2.5 (RM9634) onwards. This
function allows a broadcast message to all stations in systems operating under serial control where
messages are normally directed to a specific selected station. It is activated by sending the serial control
command to select address 255 to the master station or any station that must broadcast to all others on the
system.
10
Serial Control Mode
FIG. 1 Example System Configuration
Page 9
Configuring the RM96xx
Setting Serial Control Mode
Select Serial Control mode by turning the rotary switch (SW2) to position 3 and switching DIL switch SW1
position '3' to the 'ON' position.
Ensure that all the remaining DIL switches are set to the required positions before pressing the STORE
button (SW3) to activate the settings.
Return the rotary switch to the '0' position when all options are configured.
Operation
Upon power-up the RM96xx will use the current DIL switch settings for Address and RF Channel. If the DIL
switches are changed during operation then this change will overide the last serial command.
The serial commands will only work in RUN mode, with either of the following operational modes selected:-
Asynchronous Mode with or without ARQ
Synchronous Mode with or without ARQ
Set or Interrogate commands will only be accepted if the RM96xx has no data to transmit and no data to
output on the serial port, otherwise they will be ignored and no response returned on the serial port. If there
is no response to a command, programming has not been successful.
Note that an RM96xx can only be successfully reprogrammed when it has completed it's present data
transfer.
The maximum time taken to program an Address is 2mS.
The maximum time taken to program a new RF channel is 15mS.
The responses to Address and Channel commands will occur within the times indicated above (assuming
the commands were successful).
If the requested RF channel exceeds the maximum allowed (as defined by the radio), then the RM96xx
defaults to the highest permissable RF channel.
Any input string that does not meet the command string format or specifies an address that is out of range
will be treated as normal ASCII text and transmitted.
Guard Time
In some instances, the user's data may be the same as a valid command string which will cause problems
with the system operation.
With a <GUARD TIME> selected, any command string must be preceded by a period of inactivity on the
serial interface which is the same as or longer than the <GUARD TIME> selected. Each command is
preceded by a <GUARD TIME>, the length of which is user selectable.
Users not wishing to use the <GUARD TIME> facility must select 'No Guard Time' from the options
available.
1
2
3
SPARE
SPARE
SPARE
8
SPARE
7
6
5
4
ROTARY SWITCH = 7
Serial Control
Guard Time
ARQ
Retries
Global
Address
SWITCH SW1
Description
ON ON = 1 Second
Options
Bold items denote factory defaults.
OFF OFF = No Guard Time
OFF ON = 200 mS
ON OFF = 500 mS
OFF = 20
ON = Infinite
OFF
ON
11
... serial control mode continued
Page 10
Command Format
Serial Control mode allows the user to set or enquire about the value of an Address or RF Channel number.
The command format for each of the functions is as follows:
Set Address
Send Text String RM9600 Reply String Function
<GUARD TIME>"A000 "A:000<CR> Sets Address 0
<GUARD TIME>"A001 "A:001<CR> Sets Address 1
<GUARD TIME>"A002 "A:002<CR> Sets Address 2
<GUARD TIME>"A003 "A:003<CR> Sets Address 3
"" " "
<GUARD TIME>"A255 "A:255<CR> Sets Address 255
Note <CR> signifies a carriage return code
Interrogate Address
Send Text String RM9600 Reply String Function
<GUARD TIME>"A??? "A:xxx<CR> Returns current address in xxx
Notes
1. The command format is case sensitive - all commands must be in UPPER CASE.
2. Any character string not compliant with the above formats will not be recognised and will be
transmitted as normal data.
3. Detection of the " character will cause the modem to re-sync it's 4 byte capture to the first
byte of the string. This enables the modem to respond correctly following a character loss.
4. Each command is preceeded by a <GUARD TIME>, the length of which is selectable with the
rotary and DIL switches.
12
Set RF Channel No.
Send Text String RM9600 Reply String Function
<GUARD TIME>"C000 "C:000<CR> Sets Channel 0
<GUARD TIME>"C001 "C:001<CR> Sets Channel 1
<GUARD TIME>"C002 "C:002<CR> Sets Channel 2
<GUARD TIME>"C003 "C:003<CR> Sets Channel 3
"""
Up to maximum number of channels as specified in the EEROM
Interrogate Channel No.
Send Text String RM9600 Reply String Function
<GUARD TIME>"C??? "C:xxx<CR> Returns current channel no - xxx
... serial control mode continued
Page 11
13
User Controls
Factory Settings
The RM96xx is shipped from the factory pre-programmed to operate with the following settings:-
Serial Port
Mode Async, FEC On
Listen Before Tx ON
Serial Port RS232
Baud Rate 9600
Parity None
Data Bits 8
Stop Bits 1
RF Parameters
RF Channel 1
Power Level 500mW
Address 0
RF Data Rate 16K
User Configuration
Settings are altered by following 3 simple steps:-
1. Adjust Rotary switch (SW2) for desired
function (see table 1)
2. Select required parameters using DIL
switch (SW1)
3. Press 'STORE' button (SW3)
The above steps may be repeated for each Rotary
Switch function indicated in the table on page 14.
(refer to notes for exceptions to this rule)
To ease configuration, LED indicators D10-D17
display the current stored DIL switch settings for
each rotary switch function, excluding functions '0'
and '1'.
FIG. 2 RM96xx Radio Modem Board Layout
C
1 2 3 4 5 6 7 8
ON
UHF Synthesised
FM Transceiver
Type IRDN031/0
Frequency Range
ERP
406 to 470 MHz
500 mW max.
Made in England
Radio Data Technology Ltd
Radi o Data Tech nol ogy LTD 1996 RM 9600/ 1
109 mm
99 mm
120mm
130mm
4 x Mounting holes are M3 (3mm)
SW1
SW2
SW3
D17
RS232
RS485 Supply
D10
D1 D8
123
+12V
GND
DC
LED FUNCTIONS (Run Mode)
D10 Carrier Detect
D11 Buffer Full
D12 Receive Serial Data
D13 Transmit Serial Data
D14 RF Receive
D15 RF Transmit
D16 Supply Voltage
D17 Supply Voltage
LED FUNCTIONS (All Modes)
Red=LOW (< -5v)
Green=HIGH (> +5v)
D1 CTS (input to RM9600)
D2 DSR (input to RM9600)
D3 DCD (output from RM9600)
D4 RxD (input to RM9600)
D5 TxD (output from RM9600)
D6 DTR (output from RM9600)
D7 Spare (reserved)
D8 RTS (output from RM9600)
Page 12
14
RM96xx User Configurable Settings
ROTARY SWITCH = 6 UPDATE EEROM (See notes page 15)
ROTARY SWITCH = 7 SERIAL CONTROL (See pages 10-12)
ROTARY SWITCH = 8 HAYES MODE (See pages 7-9)
ROTARY SWITCH = F FACTORY SETTINGS (See notes page 15)
ROTARY SWITCH POSITIONS '9' TO 'E' ARE NOT USED BOLD ITEMS DENOTE FACTORY DEFAULTS
1 2 SWITCH SW1 345678
RF POWER RF CHANNEL
OFF OFF 50mW OFF OFF OFF OFF OFF OFF
LOWEST FREQ
OFF ON 100mW OFF OFF OFF OFF OFF ON
ON OFF 250mW etc. etc. etc. etc. etc. etc.
ON ON 500mW ON ON ON ON ON ON
HIGHEST FREQ
ROTARY SWITCH = 0
RUN MODE
ROTARY SWITCH = 4
RF PARAMETERS
RF BAUD
RATE
OFF OFF
OFF ON
ON OFF
ON ON
4K
8K
16K
N/U
FEC
ON/OFF
3
ARQ
ON/OFF
RTS/CTS
HANDSHAKE
45 67
LISTEN
BEFORE Tx
8
12
ON
OFF
OFF
ON
OFF
ON
ON
OFF
OFF
ON
ARQ
TIMEOUT
OFF=
Std
ON=
Extended
DSR/DTR
H'SHAKE
ROTARY SWITCH = 3
OPERATING MODE
PRIMARY MODE
OF OPERATION
OFF OFF
OFF ON
ON OFF
ON ON
ASYNC
SYNC
MODEM
N/U
REPEATER
ON/OFF
3
REPEAT ALL
ON/OFF
AUTO REPEAT
ON/OFF
45 6
REPEATER
REMOTE
7
SERIAL
CONTROL
RS232/
RS485
8
12
OFF-X-X = REPEATER OFF
ON-OFF-OFF = STANDARD REPEATER
ON-OFF-ON = AUTOMATIC REPEATER
ON-ON-OFF = REPEAT ALL
OFF
ON
OFF
ON
OFF =
RS232
ON =
RS485
OFF OFF NONE
ON OFF EVEN
ON ON ODD
PARITY
OFF OFF 7 BITS
OFF ON 8 BITS
ON ON 9 BITS
CHARACTER
LENGTH
8
STOP
BITS
SERIAL PORT
BAUD RATE
123
67
45
ROTARY SWITCH = 5
SERIAL INTERFACE
CONFIGURATION
OFF 1
ON 2
OFF OFF OFF 150
OFF OFF ON 300
OFF ON OFF 600
OFF ON ON 1200
ON OFF OFF 2400
ON OFF ON 4800
ON ON OFF 9600
ON ON ON 19200
1 2 SWITCH SW1 345678
TEST MODE RF CHANNEL
OFF - Receive OFF OFF OFF OFF OFF OFF LOWEST FREQ
ON - Transmit OFF OFF OFF OFF OFF ON
etc. etc. etc. etc. etc. etc.
ON ON ON ON ON ON HIGHEST FREQ
ROTARY SWITCH = 1
TEST
12345678
UNIT ADDRESS
OFF OFF OFF OFF OFF OFF OFF OFF
ADDRESS '0'
OFF OFF OFF OFF OFF OFF OFF ON
etc. etc. etc. etc. etc. etc. etc. etc.
ON ON ON ON ON ON ON ON ADDRESS '255'
ROTARY SWITCH = 2
ADDRESS
Note: Address 255 is reserved for
broadcasting a message in Serial Control
mode. Please refer to ‘Global Addressing’
section of Serial Control on page 10.
Page 13
16
Fig. 5 Synchronous Mode Transmit/Receive Timing Diagram
Transmitter
Receiver
Fig. 6 Synchronous ARQ Mode Transmit/Receive Timing Diagram
Transmitter
Receiver
Fig. 3 Asynchronous Mode Transmit/Receive Timing Diagram
Fig. 4 Asynchronous ARQ Mode Transmit/Receive Timing Diagram
Timing Diagrams
Transmitter
Receiver
Transmitter
Receiver
Page 14
17
.... timing diagrams continued
TXD
Data
TX
RX
Radio
RTS
CTS
RXD
TX
RX
Radio
Data
Header
Block
Data 3
1 = Transceiver lock time &
Transmitter power up
= 10 mS max.
2 = Time varies with quantity of
data st ill to Tr an smi t.
3 = Transceiver lock time TX to RX
= 10 mS max.
1
CTS
RTS
2
Transmitter
Receiver
Fig. 7 Modem Mode Transmit/Receive Timing Diagram
RM9600
General
Frequency Range
10MHz band in the range
406 - 470 MHz
Channel Spacing 10, 12.5, 20 or 25kHz
Transmitter
RF Power Output 50 - 500mW (in 4 steps)
Adj. Channel Power -37dBm
Freq. Tolerance ± 3ppm
FM Deviation ± 3.5kHz
Receiver
RF Sensitivity - 110dBm for 10
-4
BER
Intermodulation -70dB
Adj. Channel Rejection -70dB
RM9634
General
Frequency Range 10MHz band in the range
406 - 470 MHz
Channel Spacing 12.5, 20 or 25kHz
Transmitter
RF Power Output 50 - 500mW (in 4 steps)
Adj. Channel Power -37dBm
Freq. Tolerance ± 1kHz
FM Deviation ± 2kHz
Intermod Attenuation >40dB
Spurious Emissions <-36dBm 0-1 GHz
<-30dBm 1-4 GHz
Receiver
RF Sensitivity - 110dBm for 10
-4
BER
Co-channel Rejection >-12dB
Adj. Channel Selectivity >60dB
Spurious Response Rejection >70dB
Intermod Response Rejection >70dB
Blocking >84dB for any signal >50kHz from
the tune frequency
Spurious Emissions <-57 dBm 0-1 GHz
<-47dBm 1-4 GHz
Specifications – Specific Models
Specifications – All Models
RSSI Threshold Level -105dBm at 16K
-110dBm at 8K/4K
Max. Bit Rate 16kbps (25KHz)
8kbps (10/12.5/20KHz)
Modulation GMSK
Interface Baud Rate 150-19.2 Kbaud, adjustable
Parity Odd, Even or None
Data Buffer 4 Kbytes Tx, 2 Kbytes Rx
Stop Bits 1 or 2
Data Bits 7, 8 or 9
Page 15
Mechanical & Environmental
Size
RM96xx 130 x 109 x 32mm
RM96xxB 142 x 150 x 47mm
RM96xxE/EX 280 x 190 x 130mm
Weight
RM96xx 400 g
RM96xxB 900 g
RM96xxE/EX 3.6 kg
Operating temperature -25 to +60°C
Operating humidity 20% to 75% RH
Power Supply
RM96xx/B
Power Supply 10.5 - 15.5V d.c.
Supply Current Tx 550mA (500mW)
Rx 260mA
RM96xxE/EX
Power Supply 220-260V a.c. 50Hz
Supply Current 250mA max a.c.
18
.... specifications continued
RM9600 - STANDARD SOFTWARE (RM9600-1)
Date Ver. No Comments
11/11/96 V1.0 First Issue
26/11/96 V1.1 Data Integrity upgrade
26/03/97 V1.2 C23/C24 channel upgrade
02/04/97 V1.3 ARQ Sync. Mode upgrade
03/06/97 V1.4 20kHz Option
10/06/97 V1.5 Repeater functionality
15/09/97 V1.6 Rx interrupt upgrade
22/09/97 V1.7 Serial Control Mode
ARQ Synch. Mode upgrade
04/11/97 V2.0 FEC OFF option
ARQ - 20 retries or infinite
Auto RF baud rate selection
Serial Control 7 bit data
20/11/97 V2.1 Modem Mode operation
19/06/98 V2.2 485 Sync. Mode Upgrade
10/04/99 V2.3 Hayes Mode
29/07/99 V2.4 Global Addressing
RF Data RX Indication
Serial Control Parity upgrade
05/10/99 V2.5 Ring Indicator for Hayes Mode
DCD Indication added
RM9634 - STANDARD SOFTWARE (RM9634-1)
Date Ver. No Comments
20/11/97 V2.1 First Issue
03/06/98 V2.2 Optimise data handling
19/06/98 V2.3 485 Sync. Mode upgrade
10/03/99 V2.4 Hayes Mode
29/07/99 V2.5 Global Addressing
RF Data RX Indication
Serial Control Parity upgrade
05/10/99 V2.6 Ring Indicator for Hayes Mode
DCD Indication added
Software Revisions
RS232/RS485 Serial Port Connections
RS232 9-Way 'D' Description
Pin 1 DCD Data Carrier Detect
Pin 2 RxD Receive Data
Pin 3 TxD Transmit Data
Pin 4 DTR Data Terminal Ready
Pin 5 GND Ground
Pin 6 DSR Data Set Ready
Pin 7 RTS Request To Send
Pin 8 CTS Clear To Send
Pin 9 Rx Buffer Indicator
RS485 2-Part Description
Pin 1 'B'
Pin 2 'A'
Pin 3 'GND'
RS232/485
The RM96xx has two serial ports, a 9-Way 'D' Type
connector (RS232) and a two part Phoenix
connector (RS485). Connections are as follows:-
RM9600 V2.3 onwards requires RM9600-2 control board
Pin 9 is the Ring Indicator (RI) when used in Hayes
Mode, see page 9.
RM9634 V2.4 onwards requires RM9600-2 control
board
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