GE MDS DS2710D User Manual 33839

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Document ID	33839
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Date Submitted	1999-04-22 00:00:00
Date Available	1999-06-21 00:00:00
Creation Date	2001-06-28 12:58:41
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Document Lastmod	2001-06-28 12:58:44
Document Title	33839.pdf
Document Author:	jsoscia

MDS 271OA/D
Data Transceiver
MDS 05-3447A01, REV. A.1
MARCH 1999
PRELIMINM
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M I CH DWAVE
CALIFORNIA
DATA
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QUICK START GUIDE
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Below are the basic steps for installing the transceiver. Detailed instructions are given in “Installatlon
Steps” on page 9 of this guide.
1. Install and connect the antenna system to the radio
- Use good quality. low loss coaxial cable. Keep the feedline as short as possible.
- Preset directional antennas in the direction of desired transmission.
2. Connect the data equlpment to the radio's lNTEFlFACE connector
- Connection to the radio must be made with a 03-25 Male connector. Connections for typical sys-
tems are shown below.
- Connect only the required pins. Do not use a straight-through Fla-232 cable with all pins wired.
- Verify the data equipment is configured as DTE. (By default, the radio is configured as DOE.)
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TRANSCEIVER
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3. Apply DC power to the radio (10.5—15Vdc @ 2.5 A minlmum)
- Observe proper polarity. The red wire is the positive lead; the black is negative.
4. Set the radio’s basic configuration with a Hand-Held Terminal (HHT)
- Set the transmit frequency (TX xxx.xxxxx).
- Set the receive frequency (Rx xxxxxxxx),
- It the transceiver will be listening to a switched carrier master station, set switched carrier mode
operation with the SWC command.
- If the modem is 9600 bps, set the data interface parameters as follows. Use the BNJD 9600 abc com-
mand, where 9600 is the data rate and abc are the communication parameters as follows:
a = Data bits (7 or 8)
b = Parity (N for None. O for Odd, E tor Even
c = Stop bits (1 or 2)
(Example: BAUD 9600 um)
NOTE: 7N1. BE2 and 802 are invalid parameters and are not supported by the transceiver.
5. Verify proper operation by observing the LED display
- Refer to Table A on page 16 for a description of the status LEDs.
- Refine directional antenna headings for maximum receive signal strength using the HSSI command.
uunflmm W“
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» TABLE OF CONTENTS
10 GENERAL...
‘ 1 1 Introduction . 1
1. 2 Differences Between Models. 1
1.3 Applications . 2
u Point- -to-Mu|t|pomt, Multiple Address Systems (MAS) 2
Point- to- Point System ........... 3
Continuously Keyed versus Switched Carrier Operation 4
Single Frequency (Simplex) Operation 4
1.4 Model Number Codes .. 4
1.5 Accessories 5
’ 2.0 GLOSSARY OF TERMS ......................................................................... 5
3.0 INSTALLATION ......................................................... 8
A 3.1 Installation Steps ................................................ 9
3.2 Transceiver Mounting .11
3.3 Antennas and Feedlines . .11
T Feedlines . 12
3.4 Power Connection . .13
3.5 Data Interface Connections . .13
7 3.6 Using the Radio's Sleep Mode .13
Sleep Mode Example ........ .13
_ 4.0 OPERATION ......................................................................................... 15
4.1 LED Indicators ................................................................................ 16
4.2 HSSI Measurement ........................................................................ 18
5,0 TRANSCEIVER PROGRAMMING ........................................................ 17
5.1 Hand-Held Terminal Connection & Startup . .17
5.2 Hand-Held Terminal Setup ....................... .18
5.3 Keyboard Commands .19
Entering Commands .19
"* Error Messages .20
5.4 Detailed Commend Descriptions .22
AMASK [0000 OOOO—FFFF FFFH 23
ASENSE [HI/L0].. 24
BAUD [xxxxx abc]. 24
BUFF [0N, OFF]... 24
.-- CKEY [ON—OFF] 25
CTS [0—255] .. 25
DATAKEY [0N. OFF] 25
E DEVICE [DOE CTS KEY]. 26
DKEY............ 26
MDS 05-3447A01, Rev. A Installation and Operation Guide i
“um“. mm
run
m,“
DLINK [ONIOFF/xxxx]
DMGAP [xx] ...........
DTYPE [NODFJHOOT].
DUMP
HREV.
INIT [2720]
KEY
MODEL.
MODEM [xxxx, NONE] .
OWM [xxx...]
OWN [XXX
PTT [0—255].
PWR [20—37]
RSSI ........
RTU [ON/OFFIO-BO
FlX [>o N: m MOUNTING BRACKETS
. 1: Non-intrusvs A: Standard
| 5: None
‘—] i
27 1 ON D
I_|
BANDWIDTH
MODEM
move A. “on are i: 12.5 kHz
N: Non~tedundartt _ 2: as kHz SAFETY
D‘ 32°" “F5 5: 5 kHz N: NIA
Figure 4. 2710A/D Model Number Codes
Installation and Operation Guide MDS 0573447A01, Rev. A.1
numlNlA "I'm
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1.5 Accessories
The transceiver can be used with one or more of the accessories listed in
Table 1. Contact Microwave Data Systems for ordering information.
Table 1. MDS 271 oA/D Optional Accessories
Accessory Descrlption MDS PIN
Hand-Held Terminal Terminal that plugs into the radio for 02»1501A01
Kii (HHT) programming, diagnostics a control.
includes carrying case and cable set.
RTU Simulator Test unit that simulates data from a 03-2512A01
remote terminal unit. Comes with
polling software that runs on a PC.
Useful for testing radio operation.
Order Wire Module External device that allows temporary 02-1297A01
voice communication. Useful during
setup 3 testing 01 the radio system.
Order Wire Handset Used with Order Wire Module (above). 12—1307Am
RJ-11 to 05-9 adapter Used to connect a PC to the radio's 03-3246A01
DIAG. port
Elli—232 to ElA~422 External adapter plug that convertsthe 03-2358A01
Convener Assembly radio's DATA INTERFACE connector
to EIA—422 compatible signaling.
TrL Converter External adapter plug that converts the 03-2223A01
Assembly radio's DATA INTERFACE connector
to TI'L oompatible signallng.
Radio Configuration Provides diagnostics of the transceiver 03—3156A01
Software (Windows-based PC required.)
2.0 GLOSSARY OF TERMS
If you are new to digital radio systems, some of the terms used in this
guide may be unfamiliar. The following glossary explains many of these
terms and will prove helpful in understanding the operation of the trans-
ceiver.
Active Messaging—This is a mode of diagnostic gathering that may
interrupt SCADA system polling communications (contrast with pasv
sive messaging). Active (or intrusive) messaging is much faster than
passive messaging because it is not dependent upon the RTU polling
cycle.
Antenna System Gain—A figure, normally expressed in dB, repre»
senting the power increase resulting fmm the use of a gain—type antenna.
System losses (from the feedline and coaxial connectors, for example)
are subtracted from this figure to calculate the total antenna system gain.
Bit—The smallest unit of digital data, often represented by a one or a
zero. Eight bits (plus stan, stop, and parity bits) usually comprise a byte.
Bits-per-second—See BPS.
MDS 05»3447A01, Rev. Al
in
Installation and Operation Guide
“um-mu ”mm
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mum m”!
BPS—Bits-per-second. A measure of the information transfer rate of
digital data across a communication channel.
Byte—A string of digital data usually made up of eight data bits and
start, stop and parity bits.
Decibel (dB)—A measure computed from the ratio between two signal
levels. Frequently used to express the gain (or loss) of a system.
Data Circuit-terminating Equipmenthee DCE.
Data Communications Equipment—See DCE,
Data Terminal Equipment—See DT E.
dBFDecibels referenced to an “ideal" isotropic radiator in free space.
Frequently used to express antenna gain.
dBm—Decibels referenced to one milliwatt. An absolute unit used to
measure signal power, as in transmitter power output, or received signal
strength.
DCE—Data Circuit-terminating Equipment (or Data Communications
Equipment). In data communications terminology, this is the “modem"
side of a oomputer-lo-modem connection. The MDS 2710A/D is a DCE
device.
Digital Signal Processing—See DSP.
DSP—Digital Signal Processing. In the MDS 2710A/D transceiver, the
DSP circuitry is responsible for the most critical real—time tasks; prima-
rily modulation, demodulation, and servicing of the data port.
DTLData Terminal Equipment. A device that provides data in the
form of digital signals at its output. Connects to the DCE device.
Equalization—The process of reducing the effects of amplitude, fre~
quency or phase distortion with compensating networks.
Fade Margin—The greatest tolerable reduction in average received
signal strength that will be anticipated under most conditions. Provides
an allowance for reduced signal strength due to multipath, slight antenna
movement or changing atmospheric losses. A fade margin of 20 to 30
dB is usually sufficient in most systems.
Frame—A segment of data that adheres to a specific data protocol and
contains definite start and end points It provides a method of synchro-
nizing transmissions.
Installation and Operation Guide MDS 05-3447A01, Flev. A.1
nuns-MA ”film/E"
Cm“ ms
Hardware Flow Control—A transceiver feature used to prevent data
buffer overruns when handling high-speed data from the RTU or PLC.
When the buffer approaches overflow, the radio drops the clear-to-send
(CTS) line, which instructs the RTU or PLC to delay further transmis-
sion until Cl‘S again returns to the high state.
Host Computer—The computer installed at the master station site,
which controls the collection of data from one or more remote sites.
Intrusive Diagnostics‘A mode of remote diagnostics that queries and
commands radios in a network with an impact on the delivery of the
system “payload” data. See Active messaging
Latency—The delay (usually expressed in milliseconds) between when
data is applied to TXD (Pin 2) at one radio, until it appears at RXD
(Pin 3) at the other radio.
MAS—Multiple Address System A radio system where a central
master station communicates with several remote stations for the pur-
pose of gathering telemetry data.
Master (Station)—Radio which is connected to the host computer. It is
the point at which polling enters the network.
MCU—Microoontroller Unit. This is the processor responsible for con<
trolling system start-up, synthesizer loading, and key-up control.
Microcontroller Unit—See MCU.
Multiple Address System—See MASA
Network-Wide Diagnostics—An advanced method of controlling and
interrogating MDS radios in a radio network.
Non-intrusive diagnostics—See Passive messaging.
Passive messaging—This is a mode of diagnostic gathering that does
not interrupt SCADA system polling communications. Diagnostic data
is collected non-intrusively over a period of time; polling messages are
carried with SCADA system data (contrast with active messaging).
Payload data—This is the application’s user communication data
which is sent over the radio network. It is the transfer of payload data
that is the primary purpose of the radio communications network.
Point-Multipoint System—A radio communications network or
system designed with a central control station that exchanges data with
a number of remote locations equipped with terminal equipment.
Poll—A request for data issued from the host computer (or master PLC)
to a remote radio.
MDS 05~3447A01, Rev. A.1
Installation and Operation Guide 7
mes-awn:
um
svsrms
PLC—Programmable Logic Controller. A dedicated microprocessor
configured for a specific application with discrete inputs and outputs. It
can serve as a host or as an RTU.
Programmable Logic Controller—See PLC.
Remote (Station)—A radio in a network that communicates with an
associated master station.
Remote Terminal Unit—See RTU.
Redundant Operation—A station arrangement where two transceivers
and two power supplies are available for operation, with automatic
switchover in case of a failure
RTU—Remote Terminal Unit. A data collection device installed at a
remote radio site. An internal RTU simulator is provided with
4710/9710 radios to isolate faults to either the external RTU or the radio.
SCADA~Supervisory Control And Data Acquisition. An overall term
for the functions commonly provided through an MAS radio system.
Standing Wave Ratio—See SWR.
Supervisory Control And Data Acquisition—See SCADA.
SWR—Standing Wave Ratio. A parameter related to the ratio between
forward transmitter power and the reflected power from the antenna
system. As a general rule, reflected power should not exceed 10% of the
forward power (~ 2:1 SWR).
3.0 INSTALLATION
There are three main requirements for installing the transceiver—ade~
quote and stable primary power, a good antenna system, and the correct
data connections between the transceiver and the data device. Figure 5
shows a typical remote station arrangement.
Installation and Operation Guide MDS 05-3447A01, Rev. A.1
MDS 05—3447A01, Rev. A.1
CALIFWIA "mm
m.
mus
H REMOTE TERMINAL
UNIT
ANTENNA SYSTEM
RADIO
TRANSCEIVER
CABLE Low-LOSS FEEDLINE
2.5 A (Minimum)
POWER SUPPLY
Figure 5. Typical Remote Station Arrangement
3.1 Installation Steps
Below are the basic steps for installing the transceiver. In most cases,
these steps alone are sufficient to complete the installation. More
detailed explanations appear at the end of these steps.
1. Mount the transceiver to a stable surface using the brackets supplied
with the radio
2. Install the antenna and antenna feedline for the station. Preset direc-
tional antennas in the desired direction.
3. Connect the data equipment to the transceiver’s DATA INTERFACE
connector. Use only the required pins for the application—Do not
use a fully pinned (25 conductor) cable. Basic applications may
require only the use of Pin 2 (transmit data—TXD), Pin 3 (Received
Data—RXD) and Pin 7 (signal ground). The radio can be keyed
with the use of the DATAKEV command.
Additional connections may be required for some installations.
Refer to the complete list of pin functions provided in Table 3 on
page 14.
Installation and Operation Guide 9
nun-w.
unnum-
10
mic-m
um
4. Measure and install the primary power for the radio. The red wire on
the power cable is the positive lead; the black is negative.
NOTE: Use the radio in negative ground systems only.
5. Set the radio configuration. The transceiver is designed for quick
installation with a minimum of software configuration required in
most cases. The selections that must be made or verified for new
installations are:
' Transmit frequency
' Receive frequency
The operating frequencies are not set at the factory unless they were
specified at the time of order. Determine the transmit and receive
frequencies to be used, and follow the steps below to program them.
. Connect a hand-held terminal (HHT) to the DIAG. connector. When
the HHT beeps, press ENTER to receive the ready “>” prompt.
a. Set the operating frequencies using theTx xxx.xxxx (transmit) and
RX xxx.xxxx (receive) commands.
Press after each command. After programming, the HHT
reads PROGRAMMED 0K to indicate successful entry.
Installation and Operation Guide
MDS 05~3447A01. Rev, A.1
numu “UM
mu
3.2 Transceiver Mounting
Figure 6 shows the mounting dimensions of the transceiver.
ALTERNATE
POSmON
2 75
70 mm
725
154 mm
Figure 6. Transceiver Mountlng Dimenslons
3.3 Antennas and Feedlines
Antennas
The transceiver can be used with a number of antennas The exact style
depends on the physical size and layout of the radio system. A direc—
tional Yagi (Figure 7) or corner reflector antenna is generally recom-
mended at remote sites to minimize interference to and from other users.
Antennas of this type are available from several manufacturers,
MDS 05—3447A01. Flev. A.1 Installation and Operation Guide 11
nuns-Nu W
mm m,-
12
Figure 7. Typical Yagi Antenna (mounted to mast)
Feedlines
The selection of antenna feedline is very important. Poor quality cables
should be avoided as they will result in power losses that may reduce the
range and reliability of the radio system.
Table 2 shows the losses that will occur when using various lengths and
types of cable at 200 MHZ. Regardless of the type of cable used, it
should be kept as short as possible to minimize signal loss
Table 2. Length vs. Loss in Coaxial Cables at 200 MHz
3 Meters 15 Meters 30 Meters 150 Meters
Cable Type no Fm) (4s Fm) (91 mg (525 Feet]
RG-BNU 0.32 dB 1.6 113 3.2 dB 16 GB
112 inch HELIAX 0.10 (15 0.49 dB 0.98 dB 4.9 GB
718mm HELIAX 0.05 (15 0.27 03 0.54 dB 2.7 (15
1-1/4 inch HELIAX 0.04 115 0.20 dB 0.40 dB 2.0 dB
IVS/B inch HELIAX 0.03 dB 0.17 GB 033 dB 1,65 dB
Installation and Operation Guide
MDS 05-3447A01, Rev. Al
CAUTION
USE
“i ONLY REQUIRED
PINS
3.4 Power Connection
The transceiver can be operated from any well-filtered 10.5 to 16 Vdc
power source. The power supply should be capable of providing at least
2.5 amperes of continuous current.
The red wire on the power cable is the positive lead; the black is nega-
tive.
NOTE: The radio is designed for use only in negative ground systems.
3.5 Data Interface Connections
The transceiver‘s DATA INTERFACE connector is used to connect the
transceiver to an external DTE data terminal that supports the BIA-232
(formally RS—232) format. The transceiver supports asynchronous data
rates of up to 38400 bps. The data rate at the DATA INTERFACE connector
may differ from the data rate used over the air.
Table 3 lists each pin on the DATA lNTERFACE connector and describes
its function.
Do not use a 25 wire (fully pinned) cable for connection to the DATA
INTERFACE connector. Use only the required pins for the application.
Damage may result if improper connections are made. Typical applica-
tions require the use of only Pins 1 through 8 for EIA-232 signaling.
3.6 Uslng the Radio's Sleep Mode
In some installations, such as at solar-powered sites, it may be necessary
to keep the transceiver’s power consumption to an absolute minimum.
This can be accomplished using the Sleep Mode. In this mode, power
consumption is reduced to less than 16 milliamperes (nominal).
Sleep mode can be enabled under RTU control by asserting a ground (or
BIA-232 low) on Pin 12 of the radio‘s DATA INTERFACE connector.
When Pin 12 is opened (or an EIA-232 high is asserted), the radio will
be ready to receive data within 75 milliseconds.
All normal functions are suspended while the radio is in sleep mode. The
PWR LED will be off, except for a quick flash every 5 seconds.
Sleep Mode Example
The following example describes Sleep Mode implementation in a typ-
ical system. Using this information, you should be able to configure a
system that will meet your own particular needs.
“MM
MDS 05-3447A01, Rev. A.1
Installation and Operation Guide 13
Example:
Suppose you need communications to each remote site only
once per hour. Program the RTU to raise an BIA-232 line once
each hour (DTR for example) and wait for a poll and response
before lowering it again. Connect this line to Pin 12 of the
radio’s DATA INTERFACE connector. This will allow each RTU to
be polled once per hour with a significant savings in power con
sumption.
Table 3‘ DATA INTERFACE Connector Plnouts
E—
Pll’l
Inputl
Number Output Pln Description
-- Protective Ground. Connects to ground (negative supply
potential) on the radio‘s PC board and chassis.
IN TxD—Transmltted Data. Accepts TX data from the
connected device.
OUT HxD—Hecolved Data. Outputs received data to the
connected device.
IN RTS—flequelt-to-Sand Input. Keys the transmitter when
RTS is at logic high.
OUT CTs—Clear-to-Send Output. Goes "high" alter the
programmed CTS delay time has elapsed (DCE) or keys
an attached radio when RF data arrives (CT S KEY).
OUT DSFt—Data Set Ready. Provides a +6 Vdc DSR signal
through a 2.5 kg reslstor.
-- Signal Ground. Connects to ground (negative supply
potential) at radio's PC board.
OUT DOD—Data Carrier Detect. Goes "high“ when the modern
detects a data carrier lrom the master station.
IN Transmlt Audlo Input. Connects to the audio output of an
external (AFSK) modem. The input impedance is 600 (2.
Use Pin 7 tor the modern's return lead.
10
OUT HUS—Receiver Unsquelched Sensor. Not used in most
installationsI but is available as a oonvenlenoe. Provides
to Vdc through a 1 kn resistor whenever the receiver
squelch is open. and drops to less than 1 Vdc when the
squelch is closed.
11
OUT Receive Audlo Output Connects to the audio input at an
external (AFSK) modem. The output impedance is 600 Q.
and the level is lactory set to suit most installations. Use
Pin 7 for the modem‘s return lead.
12
IN Radlo Inhiblt (sleep). A ground on this pin places the
radio into the “sleep" mode. It turns oft most circuits in the
radio, including transmit. receive, modem and dlagnostic
functions. This allows for greatly reduced power
consumption, yet preserves the radio's ability to be quickly
brought online.
13
— Do not oonnect—Reserved tor luture use.
14
IN PTr—Push to Talk. This line is used to key the radio with
an activehigh signal at +5 Vdc.
14 Installation and Operation Guide MDS 05-3447A01. Ftev. A.1
mum
m m
m...
Table 3. DATA INTERFACE Connector Pinouts (Continued)
Fin lnput/
Number Output Pln Descriptlon
15 OUT Remote HTU Reset. Do notconnect—Fieserved toriuture
use.
16 IN Pi l—Push to Talk. This line is used to key the radio with
an active—low signal of 0 Vdc.
17 -- Do not connect—Reserved lor luturs use.
18 lN/OUT Accessory Power. Unregulated Input/Output. Provides a
source of input power tor low current accessories.
Excessive drain on this connection will trip self»resetling
fuse F1 on the transceiver PC board. The voltage at this
pin will match the input voltage to the transceiver.
19 OUT 9.9 Vdc Regulated Output Provides a source of
regulated voltage at 100 mA for low power accessories.
20 -- Do not connectheserved for iuture use.
21 OUT RSSl—Recelved Slgnal Strength Indication. A DC
voltmeter may be connected to this pin to read the relative
strength oi the incoming signal. Figure B is a chart showing
HSSI vs. DC voltage.
22 - Do not connect—Reserved for future use.
23 IN Dlagnostlc Channel Enable. A ground on this pin causes
the radio's microcontroller to open the DIS-25 DATA
INTERFACE tor diagnostics and control instead of the
normal RJ-11 DIAG. connection.
24 u Do not connect—Reserved tor tuture use.
25 OUT Alarm. A logic low (less than 0.5 volts) on this pin indicates
normal operation. A logic high (greater than 4 volts)
indicates that some alarm condition is present This pin
can be used as an alarm output. provided the internal
series resistance of 1 kg is considered.
4.0 OPERATION
ln-servioe operation of the transceiver is completely automatic. Once
the unit has been properly installed and configured, operator actions are
limited to observing the front panel LED status indicators for proper
operation.
If all parameters are correctly set, operation of the radio can be started
by following these steps:
1. Apply DC power to the transceiver.
2. Observe the LED status panel for the proper indications (Table 4).
3. If not done earlier, refine the antenna heading of the station to maxi-
mize the received signal strength (RSSI) from the master station.
MDS 05~3447A01. Rev. A.1
Installation and Operation Guide 15
mm...“ urn-mum:
mm
Use the RSSI command from an HHT connected to the radio‘s DIAG.
connector.—See Section 5.0, TRANSCEIVER PROGRAMMING
This can also be done with a DC voltmeter as described in
Section 4.2, RSSI Measurement.
4.1 LED Indicators
Table 4 describes the function of each status LED.
PWR DCD TXD FIXD
DISCI-
Table 4. LED Status indicators
LED Name Description
PWR - Continuous—Power is applied to the radio, no problems detected.
- Rapid llasn (five |Imes~per~second)—Faun indication.
- Flashing once every 5 secondsffladio is in Sleep mode.
DCD - Hashing—Indicates the radio is receiving intermittent data frames.
- Conlinuous—Radio is receiving a data signal from a continuously
keyed radio.
TXD An EMA-232 mark signal is being received a! the DATA iNTERFACE
connector.
RXD An ElA-232 mark signal is being sent out from the DATA INTERFACE
connector.
4.2 RSSI Measurement
As an alternative to using an HHT, the radio’s received signal strength
(RSSI) may be read with a DC voltmeter connected to Pin 21 of the DATA
INTERFACE connector. Figure 8 shows the relationship between
received signal level and the DC voltage on Pin 21 of the DATA INTER-
FACE connector. (Note: Readings are not accurate for incoming signal
strengths above —50 dBm.)
ii
16 Installation and Operation Guide MDS 05-3447A01, Rev. A.1
uummm mm
-., mm , 1 mm.
ms
9“
e DCVOLTS (FIN 21)
p m a
or m or A m
re
>~° 9° f fie
slGNAL LEVEL (d 5m)
Figure 8. HSSI vs. Vdc (Typical)
5.0 TRANSCEIVER PROGRAMMING
Programming and control of the transceiver is performed through the
radio’s RJ-ll DIAG. (Diagnostics) connector with an MDS Hand-Held
Terminal (MDS P/N 02-1501A01). This section contains a reference
chart (Table 6) followed by detailed descriptions for each user com-
mand.
NOTE: In addition to HHT control, Windows-based software is avail-
able (MDS P/N 03-3156A01) to allow diagnostics and
programming using a personal computer. An installation
booklet and on—line instructions are included with the soft-
ware Contact MDS for ordering information.
5.1 Hand-Held Terminal Connection & Startup
This section gives basic information for connecting and using the MDS
Hand-Held Terminal. For more information about the terminal, refer
also to the instructions included with each HHT kit‘
The steps below assume that the HHT has been configured for use with
the transceiver (80 character screen display). if the HHT was previously
used with a different model transceiver, or if its default settings have
been changed, refer to Section 52, Hand-Held Terminal Setup for setup
details.
Follow these steps to connect the HHT:
14 Connect the HHT’s coiled cord to the DIAG.(RJ-11)jack on the radio
as shown in Figure 9. This automatically places the radio into the
control and programming mode.
As an altemalive, the DATA INTERFACE (DB-25) connector may be
MDS 05-3447A01, Rev. Al
Installation and Operation Guide 17
“um“, mum
5. turn
"" ”W" ml
used for programming instead of the DIAG. jackt With this arrange—
ment, Pin 23 of the HHT cable must be grounded to enable the diag—
nostic channel. (See Table 3.)
2. When the HHT is connecled, it runs through a brief self-check,
ending with a beep. After the beep, press ENTER to obtain the ready
“>“ prompt.
Figure 9. Hand-Held Terminal Connected to the Tr-nsceiver
5.2 Hand-Held Terminal Setup
The following is a set of instmctions for rte-initializing an HHT for use
with the transceiver. These steps may be required if the HHT was previ-
ously used with a different radio, or if the HHT default settings have
been inadvertently altered.
1. Plug the HHT into the DIAG. connector. Enable the setup mode by
pressing the SHIFTI, 0le and ISPACE keys in sequence. The display
shown in Figure 10 appears.
H—
18 Installation and Operation Guide MDS 0573447A01. Rev. Al
MDS 05—3447A01. Rev. A.1
- “mam
BEES fl
Fie~lnit HT no
MILL EMT NEXT
Figure 10. HHT Setup Display
2. The first of 15 menu items is displayed. Settings are reviewed by
pressing the NEXT function controlled by the [5 key. Parameter set-
tings are changed by pressing the ROLL function controlled by the
A key.
3. Set up the HHT as listed in Table 5.
Table 5. HHT Operational Settings
Parameter Setting Parameter Setting
Re-init HT N0 Scroll On 33rd
Baud Rate 9609 Cursor ON
Comm bits 8,1,n CRLF for CH OFF
Parity Error OFF Sell Test FAST
Key Repeat OFF Key Beep ON
Echo OFF Screen Size 80
Shift Keys YES Menu Mode LONG
Ctl Chars PROCS
5.3 Keyboard Commands
Table 6 is a reference chart of software commands for the transceiver.
Programmable information is shown in brackets [ ] following the com-
mand name. See Section 5.4, Detailed Command Descriptions for
detailed command descriptions.
Entering Commands
To enter a command, type the command, followed by an ENTER key-
stroke For programming commands, the command is followed by
SPACE and the appropriate information or values, then ENTER .
Installation and Operation Guide 19
—mm
mm. ........
20
Here are some additional points to remember when using the HHT:
- Use the key to access numbers; press again to return to letter
mode.
- Use the mans key to edit information or commands entries.
' The flashing square cursor (.) indicates that letter mode is
selected.
' The flashing superscript rectangular cursor (a) indicates that
number mode is selected.
Error Messages
Listed below are some possible error messages that may be encountered
when using the HHT:
UNKNOWN COMMAND—The command was not recognized. Refer to the
command description for command usage information.
INCORRECT ENTRv—The command format or its associated values were
not valid. Refer to the command description for command usage infor—
mation.
COMMAND FAILED—The command was unable to successfully complete.
This may indicate an internal software problem.
NOT PHOGHAMMED—Software was unable to program the internal radio
memory or the requested item was not programmed.This is a serious
internal radio error. Contacl MDS for assistance.
TEXTTUO LONG—Response to OWN or OWM command when too many
characters have been entered. Refer to the command description for
command usage information.
NOT AVAILABLE—The entered command or parameter was valid, but it
referred to a currently unavailable choice. Refer to the command
description for command usage information.
ACCESS DENIED—The command is unavailable to the user. Refer to the
command descriptions for command information.
EEPROM FAILURE—v The INrr command was unable to write to EEPROM.
This is a serious internal radio error. Contact MDS for assistance.
Installation and Operation Guide MDS 05~3447A01. Rev. A.1
z, mam
m...
m.
Table 6. Command summary
Command name Function
AMASK [0000 Set of display hex code identifying which events
MOO-FFFF FFFF] trigger an alarm.
Details page 23
ASENSE [HI/LO] Set or display the state at the alarm output signal
Details page 24 to ACTIVE HI or ACT lVE L0.
BAUD [xxxxx abc] Set or display the DATA INTERFACE data rate
Details page 24 and oontrol bits.
BUFF [ON, OFF] Enables or disables the internal radio data butler.
Details page 24
crs [0—255] Set or display the Clear~to—Send delay in
Details page 25 seconds.
CKEV [ON—OFl-j Enables or disables the continuously keyed
Details page 25 mode. Note: Remotes cannot receive when
keyed.
DATAKEV (ON. OFF]
Toggles between keyron»data and key-on-RTS.
Dela/Is page 25
DKEV Dekely the radio (transmitter OFF). This is
Details page 26 generally a radio test command.
DLINK [ON/OFF/xxxx] Configures local diagnostic link protocol.
Details page 26
DMGAP [xx] (Diagnostics) Sets the amount of time to wait after
Details page 26 the receipt of a character belore interpreting the
next received character as the start of a new
message.
DTYPE [MODE/ROOT] (Diagnostics) Sets up a radio as a root or node
Details page 26 radio.
DUMP Display all programmable settings.
Details page 27
HREV Display me Hardware Revision level.
Details page 27
INIT Set radio parameters to lactory defaults.
Details page 27
INIT [271 D] Restores certain transceiver defaults before using
Details page 27 the INIT lorzo command.
INIT [2710] Configure radio tor use with an M05 model F-20
Details page 27 chassis.
KEY Key the radio (transmitter ON). This is generally
Details page 28 used for radio testing.
MODEL Display the model number of the radio.
Details page 28
MODEM [xxxx, NONE] Set the modem characteristics of the radio.
Details page 28
OWM [XXX...] Set or display the owner's message.
Delails page 28
MDS 05-3447A01. Rev. A.1
Installation and Operation Guide 21
nun-nut W
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Table 6. Command summary (Continued)
Command name Function
OWN [xxxm] Set or display the owner's name.
Details page 28
PTT [0-255] Sel or display lhe Push-to-Talk delay in
Details page 28 milliseconds.
PWR [20—37] Sel or display the transmit power setting.
Details page 28
RSSI Display the Received Signal Strength Indication.
Details page 29
FITU [ON/OFF/O-EOI Enables or disables the radio‘s internal RTU
Details page 29 slmulator and sets the RTU address.
Rx [xxx.xxxx] Set or display receiver lrequency.
Details page 29
RXTOT [NONE, 1-255] Set or display the value of the receive timeout
Details page 29 timer,
SCD [0-255] Set or display the Soft-carrier Dekey delay in
Details page 29 milliseconds,
SER Display the radio serial number,
Details page 29
SHOW roe. PORT, PWR] Display the DC voltages diagnostics port, and
Details page 30 transmit power level.
SREV Dlsplay the Soflware Revision Level.
Details page 30
STAT Display radio status and alarms.
Details page 30
TEMP Display the Internal temperature at the radio in
Details page 30 degrees Celsius,
TOT [1 -255, ON. OFF] Set or display the Time-out Timer delay in
Details page 31 milliseconds.
TX [mower] Set or display the transmit frequency.
Details page 31
UNIT ||0000...65000| Set of display lhe transoelver's unit address. __I
Details page 31
5.4 Detailed Command Descriptions
The only critical commands for most applications are transmit and
receive frequencies (RXm.x>orx,TX xxxmx). However, proper use of the
additional commands allows you to tailor the transceiver for a specific
use, or conduct basic diagnostics on the radio. This section gives more
detailed information for the user commands previously listed in Table 6.
Installation and Operation Guide
MDS 05-3447A01, Rev. A.1
“mm. mm
“a“ E WA
_ i: ms
In many cases, the commands shown here can be used in two ways.
_ First, you can type only the command name to view the currently pro»
grammed data. Secondly, you can set or change the existing data by
typing the command, followed by a space, and then the desired entry. In
the list below, allowable programming variables, if any, are shown in
brackets following the command name.
AMASK [oooo OOOO—FFFF FFFF]
The AMASK (alarm mask) command displays or sets which events cause
the alarm output signal to be active. Normally, the mask is FFFF FFFF,
7 meaning that any ofthe 32 possible events will activate the alarm output
signal.
Entering the AMASK command alone displays the current setting of
alarm events in hexadecimal format.
Entering the AMASK command followed by an eight-digit hexadecimal
number reprograms the specified events to trigger an alarm.
.. The eight-digit hexadecimal number used as the command parameter is
used to classify up to 32 events as alarm triggers, or disable alarm noti-
fication for an event. (See Table 7 below for a list of events.) The hex
value for the mask corresponds to the hex value for the STAT command
(see the STAT Command description).
Each bit that is a ‘ l ’ identifies the associated alarm condition as a major
alarm, Each bit that is a ‘0’ disables major alarm notification for that
condition. If both the major and minor alarm bits are set to ‘0’ for that
condition, alarm notification is entirely disabled. For more information
on configuring the alarm response, contact Microwave Data Systems
and request Application Bulletin 98-002.
~ — Table 7. Text messages of alarm event codes
h“
Event Number Text Message
.. 01 Hardware mismatch
02 Model number not programmed
03 Authorization lault
04 Synthesizer is out-ot-lock
07 Voltage regulator fault detected
08 Radio is not calibrated
09 DSP download laull
10 EEPROM write failure
11 Checksum lault
12 Receiver time-out
ts Unit address is not programmed
I7 Data parity error
1“—
MDS 05-3447A01, Rev. A.1 Installation and Operation Guide 23
mm mm
nu
tam
Table 7. Text messages of alarm event codes (Continued)
Event Number Text Message
18 Data framing error
20 Configuration error
25 av regulator output is not in valid range
26 DC input power is not in valid range
31 Internal Temperature is not in valid range
ASENSE [HI/L0]
The ASENSE command sets or displays the sense of the alarm output at
Pin 25 of the DATA INTERFACE connector
Entering the ASENSE command alone shows whether the alarm output is
active high or low. Entering the ASENSE command followed by HI or L0
resets the alarm output to active high or low.
BAUD [xxxxx abc]
This command sets (or displays) the communication attributes for the
DATA INTERFACE port. It has no effect on the RH 1 DIAG. port.
The first parameter (moor) is baud rate Baud rate is specified in
bits-per-second (bps) and must be one of the following speeds: 110, 300,
1200, 2400, 4800, 9600, 19200, or 38400.
The second parameter of the BAUD command (also) is a three-character
block indicating how the data is encoded:
a = Data bits (7 or 8)
b = Parity (N for None, 0 for Odd, E for Even)
e = Stop bits (1 or 2)
The factory default setting is 19200 baud, 8 data bits, no parity, 1 stop
bit (Example: 19200 am).
NOTE: 7N1, 802, and 8E2 are invalid communication settings and are
not supported by the transceiver.
BUFF ton, OFF]
This command sets or displays the received data handling mode of the
radio. The command parameter is either ON or OFF. The default is ON.
The setting of this parameter affects the timing of how received RF data
is sent out the INTERFACE connector. Outgoing (transmitted) data is not
affected by this setting.
Installation and Operation Guide MDS 05-3447A01, Rev. A.1
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If data buffering is OFF, the radio operates with the lowest possible
average latency. Data bytes are thus sent out the tNTEFiFACE port as soon
as an incoming RF data frame is disassembled. Average and typical
latency will both be below 10 ms, but idle character gaps may be intro-
duced into the outgoing data flow.
If data buffering is ON, the radio operates in seamless mode. Data bytes
will be sent over the air as quickly as possible, but the receiver buffers
(stores) the data until enough bytes have arrived to cover worst-case
gaps in transmission. This mode of operation is required for protocols
such as MODBUST" that do not allow gaps in their data transmission.
Note that seamless mode (BUFF ON) is intended only for applications
where the transmitter’s baud rate is greater than or equal to the
receiver‘s baud rate. Adherence to this rule is left up to the user.
CKEY [ON—OFF]
The CKEY command enables or disables the continuously-keyed func-
tion of the radio. When CKEY is set to ON, the radio is continuously
keyed.
crs [0-255]
The CTS (clear-to-send) command selects or displays the timer value
associated with the CTS line response. The command parameter ranges
from 0 to 255 milliseconds.
For DCE operation, the timer specifies how long to wait after the RTS
line goes high, before the radio asserts CT S and the DTE can transmit
the data. A CTS value of zero keys the radio and asserts the CT S line
immediately after the RTS line goes high.
For CTS Key operation (see DEVICE command), the timer specifies how
long to wait after asserting“ the CTS, before sending data out the DATA
INTERFACE port. A timer value of zero means that data will be sent out
the data port without imposing a key—up delay. (Other delays may be
present based on selected radio operating parameters.)
DATAKEY [ON, OFF]
The DATAKEY command sets or displays the ability of the radio to key the
transmitter as data is received at the DATA INTERFACE connector.
Asserting RTS keys the radio regardless of this command setting.
If DATAKEY is set to on, the radio will key when a full data—character is
received at the transceiver’s DATA INTERFACE connector. If DATAKEY is
set to OFF, the radio needs to be keyed by asserting either the RTS or
P’T'I' signal or with the CKEY or KEV command.
MDS 0543447A01. Rev. A.1
Installation and Operation Guide 25
-=-e-=m
m...“ m
26
DEVICE (DOE, CTS KEY]
The DEVICE command sets or displays the device behavior of the radio.
The command parameter is either DOE or c‘rs KEV.
The default selection is DCE. In this mode, CT S will go high following
RTS, subject to the CTS programmable delay time. If the DATAKEY com-
mand is set to ON, keying can be stimulated by the input of characters at
the data port. Hardware flow control is implemented by signaling the
CTS line if data arrives faster than it can be buffered and transmitted.
If crs KEY is selected, the radio is assumed to be controlling another
radio. The RTS line is ignored and the CTS line is used as a keyline con-
trol for the other radio. CTS is asserted immediately following the
receipt of RF data, but data will not be sent out the DATA INTERFACE port
until after the Cl" S programmable delay time has expired. (This gives
the other radio time to key.)
DKEY
This command deactivates the transmitter after it has been keyed with
the KEV command.
DLINK [ON/OFF/xxxx]
This command is used to configure the local diagnostic link protocol
used in network-wide diagnostics.
Entering DUNK ON enables the diagnostic link. Entering DLINK OFF dis»
ables the diagnostic link.
To change the diagnostic link, enter DUNK followed by one of the fol-
lowing baud rates: 1200, 2400, 4800, 9600, 19200 (default).
DMGAP [xx]
The DMGAP command sets the amount of time in milliseconds to wait
after the receipt of a character before interpreting the next received char-
acter as the start of a new message. When data port baud rates are slow,
the gap between characters within a poll may be so long that the radio
interprets the next character as the start of a new poll. When diagnostics
is being performed using passive messaging (see Performing Net-
work— Wide Remote Diagnostics on page 35), this command may be used
to change this behavior.
orva [MODE/ROOT]
This command establishes the local radio as a root radio or node radio
for network—wide diagnostics. Entering oTvPE NODE configures the
radio as a node radio. Entering DTYPE Root configures the radio as a root
radio. Entering the DTVPE command alone displays the current setting.
See “Performing Network-Wide Remote Diagnostics” on page 35.
Installation and Operation Guide MDS 05~3447A01, Rev. A.1
Mm
numnm
“m" a
DUMP
This command displays all the programmed settings of the radio. The
HHT display is too small to list all the command settings at one time.
Therefore, this command is most useful if the command is issued from
a computer or full-screen terminal.
HREV
This command displays the transceiver’s hardware revision level.
INIT
The INIT command is used to re-initialize the radio’s operating parame-
ters to the factory defaults. This may be helpful when trying to resolve
configuration problems that may have resulted from the entry of one or
more improper command settings. If you are unsure of which command
setting may have caused the problem, this command allows you to get
back to a known working state. The following changes to the radio are
made when INIT is entered:
- crs is set to 0
- DATAKEV is set to ON
' DEVICE is set to DOE
- MT is set to 0
' son is set to O
- TOT is set to 30 seconds and set to ON
- PWR is set to +37 dBm (5 watts)
All other commands stay at their previously established settings.
our [2710]
This command sets the transceiver for operation outside the MDS model
P-20 chassis by setting the following parameters as shown.
ASENSE AC11VE HI
AMASK FFFF FFFF (assert alarm output on all alarms)
RXTOT NONE (receive time-out timer disabled)
This command can be used prior to using the INIT 2720 command to
restore the standard transceiver defaults.
MT [27201
This command sets the transceiver for operation inside the model P-ZO
chassis by setting the following parameters as shown.
ASENSE AC'I'NE Lo
AMASK FFFF oooo (trigger on major alarms)
RXTOT 20 (20 minute time-out timer)
MDS 05~3447A01, Rev. A.1
Installation and Operation Guide 27
28
mum
mu
KEY
This command activates the transmitter. See also the DKEv command.
MODEL
This command displays the radio’s model number code.
MODEM [xxxx, NONE]
This command selects the radio’s modem characteristics. Enter 9600 for
digital operation, or enter NONE to select analog operation.
OWM [)O(X...]
This is a command to display or program an owner’s message. To pro-
gram the owner's message, type OWM then the message, followed by
ENTER .
To display the owner’s message, type OWM then ENTER . The owner’s
message appears on the display.
OWN [X)O(...]
This is a command to display or program an owner’s name. To program
the owner’s name, type owN then the name, followed by ENTER .
To display the owner’s name, type own then ENTER i The owner’s
name appears on the display.
P'IT [0—255]
This command sets or displays the key-up delay in milliseconds.
This timer specifies how long to wait after the radio receives a key signal
from either the PTI‘ or RTS lines (on the DATA INTERFACE), before actu»
ally keying the radio.
PWR [20—37]
NOTE: This function may not be available, depending on certification
requirements in a panicular country.
This command displays or sets the desired RF forward output power set-
ting of the radio. The PWR command parameter is specified in dBm and
can range from 20 through 37. The default setting is 37 dBm (5 watts).
To read the actual (measured) power output of the radio, use the SHOW
PWH command. A dBm-to-watts conversion chart is provided in
Section 75.
|nstallalion and Operation Guide MDS 05-3447A01, Rev. A.1
“urn-mu "mm
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RSSI
This command continuously displays the radio’s Received Signal
Strength Indication (RSSI) in dBm units, until you press the Enter key,
Incoming signal strengths from —50 dBm to —120 dBm can be read.
FITU [ON/OFF/O—BO]
This command re-enables or disables the radio’s internal RTU simu-
lator, which runs with MDS’ proprietary polling programs (poll.exe and
rsim.exe). The internal RTU simulator is available whenever a radio has
diagnostics enabled. This command also sets the RTU address that the
radio will respond to.
The internal RTU can be used for testing system payload data or pseudo
bit error rate testing. It can also be helpful in isolating a problem to either
the external RTU or the radio.
RX [xxx.xxxx]
This command selects or displays the radio’s receive frequency in MHz.
The frequency step size is 6.25 kHz.
If the customer frequency has not been programmed at the factory, a
default frequency will be programmed in the radio near the center of the
frequency band.
RXTOT [NON E, 1-255]
The RxTOT command selects or displays the receive time—out timer value
in minutes. This timer triggers an alarm (event 12) if data is not detected
within the specified time.
Entering the RXTOT command Without a parameter displays the timer
value in minutes. Entering the HXTDT command with a parameter
ranging from 0 to 255 resets the timer in minutes. Entering the RXTOT
command with the parameter NONE disables the timer.
SCD [0-255]
This command displays or changes the soft—carrier dekey delay in milli-
seconds.
This timer specifies how long to wait after the removal of the keying
signal before actually releasing the transmitter. A value of 0 millisec»
onds will unkey the transmitter immediately after the removal of the
keying signal.
SER
This command displays the radio’s serial number as recorded at the fac-
tory.
MDS 05-3447A01, Rev. A.1
Installation and Operation Guide 29
uumnum mom'-
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SHOW [DC, PORT, PWR]
The SHOW command displays different types of information based on
the command variables. The different parameters are:
- Dc—Display DC input/output voltages
- Pom—Display the connector port (RJ-ll or DB—25) that is active
for diagnostics and control
- Pwn—Display RF power output
SNR
This command continuously displays the signal-to-noise ratio of the
received signal expressed in dB, until you press the Enter key. As used
in this guide, the signal-to-noise measurement is based upon the signal
level following equalization, for received frames.
The SNR is an indication of the received signal quality. The SNR indi-
cation ranges from 10 dB to 33 dB. A value of 10 dB represents a very
poor signal. A value of 24 dB represents a very good signal.
When the SNR command is used, it causes the DIAG. port to enter an
update mode, and the signal-to-noise ratio is updated and redisplayed
every 2 seconds. The SNR continuously updates until the ENTER key is
pressed.
SREV
This command displays the software revision level of the transceiver
firmware.
STAT
This command displays the current alarm status of the transceiver.
If no alarms exist, the message no ALARMS PRESENT appears at the top
of the HHT display.
If an alarm does exist, a two—digit code (00—31) is displayed and the
alarm is identified as “Major” or “Minor." A brief description of the
alarm code is also given.
if more than one alarm exists, the word MORE appears at the bottom of
the screen and additional alarms are viewed by pressing the m]
key. Detailed descriptions of event codes are provided in Table 8 on
page 33.
TEMP
This command displays the internal temperature of the transceiver in
degrees Celsius.
30
Installation and Operation Guide MDS 05-3447A01‘ Rev. A.1
uurulmu mm
mum m
TOT [1 -255, ON, OFF]
This command sets or displays the transmitter Timeout Timer value
(1-255 seconds), as well as the timer status (ON or OFF). If the timer is
on, and the radio remains keyed for a longer duration than the TOT value,
the transmitter is automatically unkeyed.
When this happens, the radio must be commanded back to an unkeyed
state before a new keying command is accepted The default timer value
is 30 seconds.
* TX [xxx.xxxx]
This command selects or displays the radio’s transmit frequency in
MHz. The frequency step size is 625 kHz.
If the customer frequency has not been programmed at the factory, a
default frequency will be programmed in the radio near the center of the
frequency band.
UNIT [10000...65000]
This command selects or displays the radio's unit address. The factory
default setting is the last five digits of the transceiver’s serial number
The unit address is used in network diagnostics See MDS’ Net-
work-Wide Diagnostics System Handbook (MDS P/N 05-3467A01) for
more informatiion.
6.0 TROUBLESHOOTING
Successful troubleshooting of the radio system is not difficult, but it
requires a logical approach. It is best to begin troubleshooting at the
master station, as the rest of the system depends on the master for
polling commands. If the master station has problems, the operation of
the entire network can be compromised.
It is good practice to start by checking the simple things. For proper
operation, all radios in the network must meet these basic requirements:
- Adequate and stable primary power. The radio contains an inter-
nal self-resetting fuse (4A). Remove and re-apply primary power
to reset.
' Secure connections (RF, data and power)
' An efficient and properly aligned antenna system with a good
received signal strength (at least —90 dBm). It is possible for a
system to operate with weaker signals, but reliability will be
degraded.
,, - Proper programming of the transceiver’s operating parameters
(see Section 5.0, TRANSCEIVER PROGRAMMING).
MDS 05-3447A01, Rev. A.1 Installation and Operation Guide 31
um
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- The correct interface between the transceiver and the connected
data equipment (correct cable wiring, proper data format, timing,
etc.)
6.1 LED Indicators
The LED status indicators are an important troubleshooting tool and
should be checked whenever a problem is suspected. Table 4 on page 16
describes the function of each status LED.
6.2 Event Codes
When an alarm condition exists, the transceiver creates a code that can
be read on an HHT connected to the DIAG. port. These codes can be very
helpful in resolving many system difficulties. Refer to Table 8 for a def-
inition of the event codes.
Checking for Alarms—STAT command
To check for alarms, enter STAT on the HHT. If no alarms exist, the mes—
sage N0 ALARMS PRESENT appears at the top of the display (Figure 11).
IID mums PRESENT
Figure 11. HHT Dlsplay In Response to STAT command
If an alarm does exist, a two-digit alarm code (00—31) is displayed and
the event is identified as a Major or Minor Alarm. A brief description of
the alarm is also given.
If more than one alarm exists, the word MORE appears at the bottom of
the screen. To view additional alarms, press ENTER.
Maior Alarms vs. Minor Alarms
MajorAlarms—repon serious conditions that generally indicate a hard—
ware failure, or other abnormal condition that will prevent (or seriously
degrade) further operation of the transceiver. Major alarms generally
indicate the need for factory repair. Contact MDS for further assistance.
32 Installation and Operation Guide MDS 05-3447A01, Rev. A.1
murmur ”WWW!
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MinarAlarms—report conditions that, under most circumstances will
not prevent transceiver operation. This includes out~of~tolerance condi-
tions, baud rate mismatches, etc. The cause of these alarms should be
investigated and corrected to prevent eventual system failure.
Event Code Definitions
Table 8 contains a listing of all event codes that may be reported by the
transceiver.
Table 8. Event Codes
7 K
Event Event
Code Class Descrlptlon
Q“
01 Major Improper software detected for this radio model.
7 02 Major The model number of the transceiver is unprogrammed.
04 Major One or both at the internal programmable synthesizer loops is
reporting an out-of-Iock condition.
H 06 Major An unrecoverable fault was detected on the auto-D chip. The
radio will not receive data.
07 Major One or more otthe radio's internal voltage regulators is
* reporting a failure. The radio will not operate.
08 Major The system is reporting that it has not been calibrated. Factory
calibration is required Ior proper radio operation.
’ 09 -- Not used.
10 Major The inlemal microcomroller was unable to properly program
the system to the appropriate EEFROM defaults. A hardware
,.. problem may exist.
11 -— Not used.
12 Major Receiver time-out. No data received within the specified
7 receiver time-out time.
13~1 5 -~ Not used.
16 Minor Not used.
* 17 Minor A data parity lault has been detected on the DATA
INTERFACE connector. This usually indicates a parity setting
mismatch between the radio and the FITU.
‘A 18 Minor A data Iraming error has been detected on the DATA
INTERFACE connector. This may indicate a baud rate
mismatch between the radio and the FITU.
,, 1&24 —— Not used.
25 Minor The 5.6 volt power regulator is out-of—toleranoe. It the error is
excessive, operation may tail
7 26 Minor The DC input voltage is out-ot-toleranoe. It the voltage is too
far out of tolerance. operation may lail.
27. 25 » Not used
' 31 Minor The transceiver‘s internal temperature is approaching an
out-of-toleranoe condition. It the temperature drifts outside of
the recommended operating range. system operation may fall.
MDS 05—3447A01. Rev. A.1 Installation and Operation Guide 33
MDS 05-3447A01, Rev. A.1
34
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7.0 TECHNICAL REFERENCE
7.1 M05 271 OAID Transceiver Specifications
TRANSMITTER SYSTEM SPECIFICATION
Operating Frequency:
Frequency Stabitily:
Adjacent Channel Power:
Carrier Power Accuracy:
See Transmitter Specifications
31.5 ppm
-65 (150
32 dB
RECEIVER SYSTEM SPECIFICATION
Operating Frequency:
Maximum Usable Sensitivt‘ty:
See Receiver Specificalrons
-111a|5mror1><1o*i BER
Co-Channel Rejection: —12 dB
DATA CHARACTERISTICS
Signaling Standard: EIA-232
Connector: 08-25 Female
Data lnterlaoe Rates: 1300 bps to 38.4 kbpsi 200. 2400, 4500. 9600 bps—
asynchronous
Data Latency: 7 ms maximum
Byte Length: 10 or 11 bits
TRANSMITTER
Frequency Range: 220-240 MHz (MDS 271010
220—222 MHZ (MDS 2710D)
Modulation Type: Binary CPFSK
Carrier Power: 0.1 Watts lo 5 Watts
Duty Cyde: Continuous
Output impedance: 50 ohms
Frequency Stability: 21.5 ppm
Channel Spacing: 6.25 kHz steps
Transmitter Spurious
Radiated Emisslons:
Harmonics:
2nd harmonic:
3rd harmonic & higher:
Tlme-oul Timer:
Transmitter Keying:
—57 (IBM. 30 MHz to 1 GHz
47 dBm. 1 GHzlo12.5 GHz
57 disc
57 mo
13 seconds. default (selectable with TOT)
Data activated of HTS
RECEIVER
Frequency Range: 220—240 MHz
Type: Double conversion superheterodyne
Frequency Stability:
Maximum Usable Sensitivity:
Inslallation and Operation Guide
31.5 ppm
7111 dBmfor1 x106 BER
Spurious
Response Rejection:
Intermoctulation
Response Relection:
Receiver Spurious
Conducted Emissions:
Receiver Spurious
Rediated Emissions:
nun-m. mm
mm
eve-mus
70 dB
65 dB
—57 dBm. 9 kHz to 1 GHz
47 (18m, 1 GHz to 12.5 GHZ
—57 dBm, 30 MHzlo 1 GHZ
47 dBm, 1 GHzt012t5 GHz
Bandwidth: 12.5 kHz (MDS 2710A)
5 kHz (MDS 271 OD)
PRIMARY POWER
Voltage: 13.8 Vdc Nominal (10.5 to 16 Vdc)
TX Supply Current: 2.5 amps max
RX Supply Current: Operational—150 mA (nominal)
Standby (sleepFw mA
Power Connector: Integral part oI Power/Intertaoe connector
Fuse: 4 Amp Polyluse. Sell-Resetting. Internal
Reverse Polarity Protection:
(Remove Primary Power to Reset)
Diode across primary input
ENVIRONMENTAL
Humidity: 9596 at 40 degrees C
Temperature Range: —30 to 60 degrees C (full performance)
—40 lo 70 degrees C (operational)
Weight: 1.6 kilograms
Case: Die-cast Aluminum
DIAGNOSTICS INTERFACE
Signaling Standard;
Connector:
IIO Devices:
EIA—232
RJ-11 (may use 03-25 instead it Pin 23 is grounded
to enable diagnostics channel)
MDS Hand Held Terminal or PC with MDS software
7.2 Performing Network-Wide Remote Diagnostics
Diagnostics data from a remote radio can be obtained by connecting a
laptop or personal computer mnning MDS [nSite diagnostics software
to any radio in the network. Figure 12 shows an example of a setup for
performing network-wide remote diagnostics.
MDS 05-3447AO1, Rev. A1
Installation and Operation Guide 35
“um-mu W
Nun-m m,
aware nous
owsnmon _ _ _
ACTIVE Msssmmo ONLY
[NOT-PREFERIED)
mommies
mat/ran
RUNNING "find
_____.;4I
ro
moNosncs
soar
near «one OPEMW
ACTIVE messmms on
PASSIVE Messmmo
PAVLQAD can
(re sum wmumm
/’
mewsrm mu
(To MSW!)
nosreoumrsn
Figure 12. Network-Wide Remote Dlagnostics Setup
If a PC is connected to any radio in the network, intrusive polling
(polling which briefly interrupts payload data transmission) can be per-
formed. To perform diagnostics without interrupting payload data trans-
mission, connect the PC to a radio defined as the “root” radio. A radio
is defined as a root radio using the DTYPE HOO'r command locally, at the
radio.
A complete explanation of remote diagnostics can be found in MDS‘
Network-Wide Diagnostics System Handbook (MDS P/N
05-3467A01). See the Handbook for more information about the basic
diagnostic procedures outlined below.
1. Program one radio in the network as the root radio by entering the
DTYPE ROOT command at the radio.
2. At the root radio, use the DLINK on and DLINK [baud rate] commands
to configure the diagnostic link protocol on the RJ-ll port.
36 Installation and Operation Guide MDS 0543447A01, Rev. A.1
mm
3. Program all other radios in the network as nodes by entering the
DTVPE NODE command at each radio.
4. Use the DUNK on and DLINK [baud rate] commands to configure the
diagnostic link protocol on the RJ-ll port of each node radio.
5. Connect same—site radios using a null-modem cable at the radios'
diagnostic ports.
6 Connect a PC on which MDS InSite software is installed to the root
radio, or to one of the nodes, at the radio’s diagnostic port. (This PC
may be the PC being used to collect payload data, as shown in
Figure 12.)
To connect a PC to the radio‘s DlAG. port, an RJ-ll to DB—9 adapter
(MDS P/N 03.3246A01) is required. If desired, an adapter cable
may be constructed from scratch using the information shown in
Figure 13.
R141 PLUG DB-9 FEMALE
(TO RADIO) (TO COMPUTER)
4 Txo mo 2
7 5 RXD TXD 3
am pm LAYOUT 5 GND GND 5
Figure 13. RJ-11 to DB-s Adapter Cable
7. Launch the MDS InSite application at the PC. (See the MDS InSite
User’s Guide for instructions)
7.3 Bench Testing Setup
Figure 14 shows a sample test setup that can be used to verify the basic
operation of transceivers in a shop setting. The test can be performed
with any number of remote radios by using a power divider with the
required number of output connections.
The RTU simulator shown in the test setup (MDS Part No. 03-2512A01)
is a microcontroller that emulates a remote terminal unit operating at
1200, 2400, 4800, or 9600 bps. Custom software is supplied with the
RTU simulator that allows continuous polling of remote radios using an
lBM~compatible personal computer, The software reports the number of
polls sent, polls received, and the number of errors detected.
As an alternative to using an external RTU simulator, the transceiver’s
internal RTU simulator may be used (see RTU command in Table 6 on
W, page 21). (This will not provide as conclusive a test as an external sim—
ulator because it does not utilize the transceiver’s data connectori)
MDS 05-3447A01, Rev. A.1 Installation and Operation Guide 37
mam
mm
mm.
NOTE: It is very important to use attenuation between all units in the
test setup. The amount of attenuation required will depend on
the number of units being tested and the desired signal strength
(RSSI) at each transceiver during the test. In no case should a
signal greater than —50 dBm be applied to any transceiver in
the test setup.
mu SIMULATORS
Mos PIN m-zstaAm-
/EMOTE
ccwurEa HUNNtNG MDS
'PDLL EXE“ naoenm
REMOTE
MASTER STATION
It
POWER AflENuATDRS/ NON-RADIA'HNG ATTENUATOR
- men of ammu- \ ~ Install an my nausea was pure
- 5w mmmum Rating ~sw Mm'anum Rating
"(unsceivu‘s internal nru Summer may In new 31
external simulator ls unavailable. soc m
Flgure 14. Typical setup for bench testlng of radios
7.4 Helical Filter Adjustment
If the operating frequency of the radio is changed significantly, the
helical filters should be adjusted for maximum received signal strength
(RSSI). To adjust the filters, proceed as follows:
1. Remove the top cover from the transceiver by loosening the four
screws and lifting straight up.
2. Locate the helical filters on the PC board. See Figure 15.
3. Apply a steady signal to the radio at the programmed receive fre-
quency (-80 dBm level recommended; no stronger than —60 dBm)
This can be done with a signal generator or an over-the-air signal.
4. Measure the radio’s RSSI using one of the following methods:
- With an HHT (See Section 5.0, TRANSCEIVER PROGRAM-
MING on page 17).
- With MDS Radio Configuration Software (See Section 7.5,
Upgrading the Radio’s Software on page 39).
- With a voltmeter connected to Pin 21 of the DATA INTERFACE
connector (See Section 4.2, RSSI Measurement on page 16).
__——__.__..—.——-——
38
Installation and Operation Guide
MDS 05-3447A01, Rev. A,1
cut-Imam magnum
mum mm",
5. With a non-metallic adjustment tool, adjust each section oftie
helical filter for maximum RSSl. Re-install the cover to the trans-
ceivert
1 Us} Q
l um
1 mm
Fnom Plait
or we . uam
Flgure 15. Helical Filter Location
7.5 Upgrading the Radio’s Software
Windows-based Radio Configuration software is available (MDS P/N
03-3156A01) for upgrading the internal radio software when new fea-
tures become available from Microwave Data Systems. Contact MDS
for ordering information
To connect a PC to the radio's DIAG. port, an RJ-ll to DB-9 adapter
(MDS P/N 03—3246A01) is required. if desired, an adapter cable may be
constructed from scratch using the information shown in Figure 13.
Using the Radio Configuration software, select RADIO SOFTWARE
UPGRADE under the SYSTEM menu. Follow the prompts and online
instructions to determine how to proceed.
Software upgrades are distributed as ASCII files with a “528” exten-
sion. These files use the Motorola S-record format. When the download
is activated, the radio’s PWR LED will flash rapidly, confirming that a
download is in process. The download takes about two minutes.
NOTE: If a download fails, the radio is left unprogrammed and inop-
erative. This is indicated by the PWR LED flashing slowly (1
second on, 1 second off), This condition is only likely if a
power failure occurred to the computer or radio during the
downloading process. The dowuload can be attempted again
when the fault has been corrected
MDS O5—3447A01. Rev. A.1 Installation and Operation Guide 39
7.6 dBm-Watts-Volts Conversion Chart
Table 9 1s prowded as a convemence for determmmg he equivalent
wanage or voltage of an RF power expressed 10 dBm.
Table 9. dBm-Wafls-Volts Conversmn—for 50 Ohm Systems
dBm v Po dam v Po dBm mv Po 55111 W Fe
153 100.0 200W 0 225 1.0mw 749 0.50 -95 2.9
150 707 100W 4 200 .50mw -50 0.71 .010w 795 2.51
545 54.0 50W -2 .150 .s4mw -51 0.54 400 225 um
145 55.0 64W 5 450 .50mw -52 0.57 401 20
447 50.0 5014 4 .141 .4omw 755 0.50 402 1.5
445 445 411W —5 425 ,32mw -54 0.45 40:1 1.5
as 40.0 azw 0 .115 .25mw 755 0.40 404 1.41
m 52.5 25W ,7 400 .20mw -5s 0.351 405 1.27
442 32.0 21m -5 090 .1smw 57 0 52 406 1.15
+42 250 15w 75 550 125mm -55 0 236
441 252 125W 40 .071 401va 755 5.251 flBm nV Po
«0 22.5 WW 41 064 430 0.225 mww 407 1000
435 20.0 aw 42 .055 751 0.200 405 500
435 15.0 e.4w 45 050 02 0.150 409 500
157 15.0 5w ~1A 545 m 0150 4“, 710 mpw
+36 141 M 45 040 54 0.141 41. 5“,
as 125 3.2w 46 0555 412 550
4:14 11 5 2.5w dam uV Fe 413 500
453 15.0 zw 55111 mV P0 55 125 414 450
132 WW 47 31.5 455 115 415 400
031 ”SW 45 25.5 a 100 415 355
40 ‘W 45 251 00 90 417 225
129 (140 WWW -20 22.5 ,01mw 59 50 -1 15 255
125 5 50 “MW 721 20.0 »10 71 "M 415 251
127 500 “WW -2 17.9 ~71 55 420 225 .001pw
225 “5 “NW 42 15 5 -72 50 421 200
125 410“ 320mW »24 14.1 773 50 422 150
124 3 55 250mW 725 12 5 -74 45 42:1 100
023 320 ”MW -20 11,5 »75 40 424 141
122 2 50 ‘WW -27 15.0 as 55 425 125
12‘ 2 52 "MW 20 5.9 277 52 425 117
4-3) 2.25 IWmW .2g 5.0 -75 29 427 1m
119 100 “NW -30 7.1 .001mw 45 25 425 90
118 “30 “NM 41 025 so 22 5 mm 425 50 .1;w
“7 ' 50 “111W 752 5.5 01 25 0 4:10 71
0'5 H‘ “MW 43 5.0 52 150 431 51
0' 5 125 32mW 44 4.5 -55 15.0 4 52 55
1" ‘4‘5 25mW as 4.0 754 11.1 430 50
“3 ‘-°° 20mW 45 0.5 -55 12.9 454 45
1‘2 3° ‘GmW 41 a 2 as 11.5 435 40
511 15“ ‘245mW as 2.55 -57 100 436 35
0‘0 -7‘ “MW 45 2 5 50 5.0 4:17 3:1
19 M 3'“W 40 2.25 .1uw as 5.0 455 25
18 59 “NW 41 2.0 50 7,1 .501nw 4:19 25
07 50° 5mW 42 1.5 -51 5.1 440 23 .01 {W
16 “5 WW 4: 1.5 -52 5.75
15 ADD 3.2mW 44 1.4 .93 5g
1“ 355 2 5mW 45 1.25 414 4 s
25 220 2.0mw 45 1.15 45 . 0
72 .250 mm 47 1.00 m a 5.
A 252 LESMW 48 11W _97 3 2
—_—__—______—_———-—
40 Installation and Operation Guide MDS 05-3447A01, Rev. A.1
IN CASE OF DIFFICULTY...
MDS products are designed for long life and trouble-free operation. However, this equipment, as
with all electronic equipment may have an occasional component failure. The following informa-
tion will assist you in the event that servicing becomes necessary.
FACTORY TECHNlCAL ASSISTANCE
Technical assistance for MDS products is available from our Customer Support Team during
business hours (8:00 A.M.—5:30 P‘Ml Eastern Time) When calling, please give the complete
model number of the radio, along with a description of the trouble symptom(s) that you are expe-
riencing. In many cases, problems can be resolved over the telephone, without the need for
returning the unit to the factory.
Please use the following telephone numbers for product assistance:
716-24279600 (Phone)
7162429620 (FAX)
FACTORY REPAIRS
Component—level repair of radio equipment is not recommended in the field. Many components
are installed using surface mount technology, which requires specialized training and equipment
for proper servicing. For this reason, the equipment should be returned to the factory for any PC
board repairs. The factory is best equipped to diagnose, repair and align your radio to its proper
operating specifications
If return of the equipment is necessary, you will be issued a Returned Material Authorization
(RMA) number. The RMA number will help expedite the repair so that the equipment can be
repaired and returned to you as quickly as possible. Please be sure to include the RMA number on
the outside of the shipping box, and on any correspondence relating to the repair. No equipment
will be accepted for repair without an RMA number.
A statement should accompany the radio describing, in detail, the trouble symptom(s), and a
description of any associated equipment normally connected to the radio. It is also important to
include the name and telephone number of a person in your organization who can be contacted if
additional information is required.
The radio must be properly packed for retUrn to the factory. The original shipping container and
packaging materials should be used whenever possible. All factory returns should be addressed to:
Microwave Data Systems
Customer Service Department
(RMA No. xxxx)
175 Science Parkway
Rochester, NY 14620 USA
When repairs have been completed, the equipment will be returned to you by the same shipping
method used to send it to the factory. Please specify if you wish to make different shipping
arrangements.
175 Science Parkway. Rochesner. New York 14520
General Business: +1 (716) 242-9600
FAX. 01 (715) 242-9620
Warld Wld! Web: hwzllwwwmdsroawn

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