Summation Research STR1820 LAND MOBILE RADIO FOR DATA COMMUNICATIONS User Manual 70 STR1800 Operation and Maintenance Manual Rev A

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Document Title	70-STR1800 Operation and Maintenance Manual, Rev A
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Document Author:	Summation Research, Inc.

SRI
Summation Research Inc
STR-1800 L^nd Mobile D^t^ R^dio
Operations and Maintenance Manual
Research
Development
Meeting 21st Century Challenges
- with –
Technically Appropriate Solutions
Prepared by: Summation Research Inc – Melbourne, FL
SRI Document Number: 70-STR1800-00 O&M
Revision: A
This document contains information proprietary and confidential to SRI. Transmittal, receipt, or possession of this document does not express,
license, or imply any rights to use, design, or manufacture from this information. No reproduction, publication, or disclosure of this information,
in whole or in part, shall be made without prior written authorization from an officer of SRI.
SRI • 3950 DOW ROAD • MELBOURNE, FLORIDA 32934
(321) 254-2580 • FAX (321) 254-2492 • Internet : http://www.summationresearch.com
Email : info@summationresearch.com
© Copyright 2010, SRI Printed in U.S.A.
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SUMMATION RESEARCH, INC.
LIMITED WARRANTY
Summation Research, Inc. (herein called SRI) warrants that the equipment’s of its manufacture as
identified and described within this manual shall, at the time of shipment to the original purchaser, be free
from defects in material and workmanship. This warranty applies only to equipment installed, operated,
and maintained in accordance with SRI recommendations. This warranty does not apply where SRI
determines that installation, repair, alteration, or accidents have caused any claimed defect, or that
excessive deterioration due to environmental contamination has occurred.
SRI’s obligation under this warranty is limited to repairing, or replacing, exclusive of cost of installation
and labor charges, any part that SRI determines to be defective, provided that such part is received at SRI’s
principal office, freight prepaid. All equipment's must receive prior approval for return to SRI for warranty
repair, and must be sent prepaid. If they are returned collect, they will not be accepted.
This warranty is subject to any existing conditions of supply that may directly affect SRI’s ability to obtain
materials or manufacture replacement parts.
SRI makes no warranty that the equipment shall be merchantable or fit for any particular purpose; nor does
SRI make other warranties, express or implied, by operation of law or otherwise, except such as are
expressly set forth herein. SRI shall not be liable to buyer, or to any third persons for any incidental,
consequential, special or contingent damages for breach of any warranty.
All specifications within this document are subject to change without prior written notice.
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RF Exposure Statement
The radio generates RF electromagnetic energy during transmit mode. This radio is designed for and
classified as “Occupational Use Only”, meaning it must be used only during the course of employment by
individuals aware of the hazards, and the ways to minimize such hazards. This radio is NOT intended for
use by the “General Population” in an uncontrolled environment.
For compliance with FCC and Industry Canada RF Exposure Requirements, the transmitter antenna
installation shall comply with the following two conditions:
1.
2.
The transmitter antenna gain shall not exceed a limit necessary for the application.
The transmitter antenna is required to be located outside of a vehicle and kept at a separation
distance of 45 centimeters or more between the transmitter antenna of this device and persons
during operation.
To ensure that your exposure to RF electromagnetic energy is within the FCC allowable limits for
occupational use, always adhere to the following guidelines:
•
DO NOT operate the radio without a proper antenna attached, as this may damage the radio and
may also cause you to exceed FCC RF exposure limits. A proper antenna is the antenna supplied
with this radio by the manufacturer or an antenna specifically required to meet application
requirements.
•
DO NOT transmit for more than 50% of total radio use time (“50% duty cycle”). Transmitting
more than 50% of the time can cause FCC RF exposure compliance requirements to be exceeded.
Electromagnetic Interference/Compatibility
During transmissions, the radio generates RF energy that can possibly cause interference with other devices
or systems. To avoid such interference, turn off the radio in areas where signs are posted to do so. DO NOT
operate the transmitter in areas that are sensitive to electromagnetic radiation such as hospitals, aircraft, and
blasting sites.
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Record of Changes
Dates of issue for original and each revision of this document are:
REVISION
DATE
TITLE OR BRIEF DESCRIPTION
June 2010
Phase I Production Release
ISSUED BY
Tom Drago
LIST OF EFFECTIVE PAGES
This document is arranged in the following four (4) parts:
Document Cover
Warranty Statement
RF Exposure Statement
Record of Changes
Table of Contents
Document Main Text
NOTE: On document revisions, a vertical line in the outer margin of the page indicates the portion of the
text affected by the revision. A vertical line in the outer margin of the Figure or Table name indicates
changes to illustrations or tables.
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Table of Contents
SECTION 1
1.1
1.2
1.3
1.4
SECTION 2
2.1
2.2
2.3
2.4
2.4.1
2.4.2
2.4.3
2.4.4
SECTION 3
3.1
3.2
3.3
3.4
3.4.1
3.4.2.
3.4.3.
3.4
3.5.1
3.5.2
3.5.3
3.6
SECTION 4
4.1
4.2
4.2.1
5.2.2
APPENDIX A
INTRODUCTION ........................................................................................................... 1
Scope.................................................................................................................................. 1
Product Description ........................................................................................................... 1
Technical Specifications .................................................................................................... 2
Reference Documentation ................................................................................... 4
RECEIVING, INSPECTION AND INSTALLATION................................................. 5
Unloading and Unpacking ................................................................................................. 5
Receiving Documentation .................................................................................................. 5
Installation and Connection Requirements ........................................................................ 5
Connector Descriptions and Signal Definitions ................................................................. 6
Primary Power ..................................................................................................... 6
Antenna ............................................................................................................... 6
Audio/Control ...................................................................................................... 7
Diagnostic/Programming ..................................................................................... 8
OPERATION ................................................................................................................. 11
Minimum System Requirements ...................................................................................... 11
Software Installation ........................................................................................................ 11
Conventions ..................................................................................................................... 11
Getting Started ................................................................................................................. 11
Radio Interconnect ............................................................................................. 11
Power-on Sequence ........................................................................................... 12
Reading the Radio Configuration ...................................................................... 12
Altering the Radio Configuration .................................................................................... 13
Changing Individual Channel Settings .............................................................. 13
Saving/Restoring Channel Parameters............................................................... 14
Power Output Control ........................................................................................ 14
Radio Operation ............................................................................................................... 14
MAINTENANCE ........................................................................................................... 15
Maintenance Concept....................................................................................................... 15
Preventive Maintenance Requirements ............................................................................ 15
Inspection .......................................................................................................... 15
Cleaning............................................................................................................. 15
SCHEMATICS FPC, MDC .......................................................................................... 17
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List of Figures
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
STR-1800 Multi-Mode Land Mobile Data Radio ..................................................................... 1
System Overview ....................................................................................................................... 2
Field Radio to PC Interconnect Configuration ........................................................................ 11
Factory Radio to PC Interconnect Configuration .................................................................... 12
Control Software Initial Screen ............................................................................................... 13
List of Tables
Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Table 7
Specifications ............................................................................................................................. 2
Primary Power Connector Characteristics .................................................................................. 6
Antenna Port Connector Characteristics .................................................................................... 6
Audio/Control Connector Characteristics .................................................................................. 7
Audio/Control Connector Pin Assignments............................................................................... 7
Channel Selection Control Settings ........................................................................................... 8
Reference Input Connectors ...................................................................................................... 8
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SECTION 1
INTRODUCTION
The STR-1800 series of UHF radio product represents a state-of-the-art communications line providing
multi-mode, half-duplex audio to radio frequency (RF) transmit and receive functions. Consisting of
multiple models, the series provides analog FM transceiver functions in the 400 to 470 MHz frequency
bands. The design has been tailored towards narrowband data telemetry applications requiring fast
transmit/receive response times with compact size and high reliability.
1.1
Scope
This manual describes the Summation Research, Incorporated STR-1800 series of Land Mobile Radios.
The manual includes specifications, design description, installation, and operation instructions along with
routine maintenance requirements for the STR-1800.
1.2
Product Description
The STR-1800 is a modified version of a standard Model IC-F6061 UHF radio product produced by
ICOM. Future versions of this product may support VHF and extended UHF frequency bands. In order to
make the product more applicable for data communications functions, the STR-1800 product line
incorporates a custom front panel as depicted in the following picture.
Figure 1
STR-1800 Multi-Mode Land Mobile Data Radio
The custom front panel replaces the normal operator oriented local status/control interface and audio
interface connector with a DB-25 connector targeted for computer control. The DB-25 provides both the
audio interface and a selection capability for frequency select. A secondary connector provides for
diagnostic and programming functions. These features are incorporated via a custom printed circuit board
(PCB) located within the STR-1800 front panel known as a Front Panel Card (FPC). This card in-turn
interfaces with an internal daughter card known as the Modem Card (MDC).
Figure 2 depicts a top level overview of the STR-1800 Radio.
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Front Panel Bezel
Main Radio Chassis
PTT
PCB
to
PCB
Chan
Sel (4)
Tx/Rx
Audio
Conn
Front
Panel
Card
(FPC)
Flex
Modem Card
(MDC)
Main Radio Card
Flex
Diag/Prog
I/O
Figure 2
1.3
RF
Antenna
13.6
VDC
System Overview
Technical Specifications
The technical capabilities of the STR-1800 radios are summarized in the following table.
Table 1 Specifications
PARAMETER
SPECIFICATION
Frequency Range
STR-1820: 400-470 MHz
Consult factory for future versions
Number of Channels
16 preset channels selected from 510 factory configured frequencies
Frequency Stability
±0.0005% of assigned center frequency from -30°C to +60°C (+25°C
reference)
Compliance
FCC type certified (FCC 47 CFR 90) as well as Industry Canada.
Operating Power
13.6 VDC ± 15% (current @ 13.6 V: transmit 9 A, receive 0.7 A)
Operator Adjustments
None
Reliability
25,000 hr MBTF
Antenna Connector
UHF PL-259 type female located on rear panel
Audio Interface and
Control Connector
DB-25 socket on front panel including 4 channel select lines, audio
in/out, push-to-talk. Separate DB-9 socket for diagnostic and
programming interface.
Power Connector
Tyco/AMP Electronics P/N 172129-1 (female housing with male contact
pins)
Channel Spacing
Selectable to either 25 KHz or 12.5 KHz channel spacing. Hardware
capable for future 6.25 KHz channel spacing.
RF Output Power
Selectable as 3 factory set discrete power levels from 0 and 30 watts
(±2%) into a VSWR of 2:1 or better.
Output Impedance
50 ohms, nominal
Output Protection
Operating into a 10:1 VSWR of any phase angle without damage
Modulation
FM with a rated deviation of +/- 5 KHz for 25 KHz channel spacing and
+/- 2.5 KHz for 12.5 KHz channel spacing.
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Modulation Sensitivity
Radio achieves 80% (+/- 5%) of rated system deviation is for a 1 KHz
input tone between 40mV RMS and 1V RMS.
Turn-On Time
Within 20 msec (of application of the keying signal, the transceiver
reaches 90% of programmed output power and is capable of
transmitting an on frequency signal with a SINAD of 30 dB or greater.
Spurious and
Harmonic Output
-70 dB below rated power
Audio Input
Impedance
1200 Ohm ±20%
Transmit Audio
Frequency Response
Flat response over the 300-3000 Hz range with no pre-emphasis.
Minimum Duty Cycle
25% transmit duty cycle continuous. Capable of 15 s continuous keying
Output S/N Ratio
30 dB minimum fully modulated
Spurious Leakage
-57 dBm maximum
Selectivity
70 dB min @ 25 KHz channel spacing, 60 dB min. @ 12.5 KHz spacing
Intermodulation
65 dB minimum
Dynamic Range
With input signals ranging from -100 dBm to 0 dBm, the SINAD at the
receiver is 23 dB minimum when receiving a signal modulated with a 1
KHz tone at 60% rated deviation
Sensitivity
12 dB SINAD minimum for input signal level of -116 dBm
Spurious and Image
Rejection
70 dB minimum
Transmit to Receive
Recovery Time
30 msec maximum measured from removal of keying signal to the
transmitter
Audio Output
A 1 KHz signal at 80% rated deviation produces a 1 V p-p audio output
into a 600 ohm resistive load.
Receive Frequency
Response
Flat response over the 300-3000 Hz range with no de-emphasis.
Receiver Overload
A +28 dBm signal continuously for 30 minutes applied to the antenna
input will not cause any permanent damage.
Dimensions
Approximately 1.8" high x 6.35" wide x 7" deep
Weight
4.5 pounds
Vibration
Per EN 50155 Railway Applications - Electronic Equipment Used on
Rolling Stock
Shock
Per EN 50155 Railway Applications - Electronic Equipment Used on
Rolling Stock
Temperature
-30°C to +60°C (operating and storage)
Humidity
Per EN 50155 Railway Applications - Electronic Equipment Used on
Rolling Stock
Altitude
Sea level to 12,000 feet operating and 50,00 feet non-operating
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1.4
STR-1800 O&M Manual
Reference Documentation
The following documents, or the latest revision of these documents, serve as an addendum to this
document. Users are referred to these documents for maintenance and design information pertaining to the
standard ICOM radio circuitry.
Service Manual – UHF Transceivers – IC-F6061/6062/6063 © 2007 Icom Inc.)
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SECTION 2
2.1
RECEIVING, INSPECTION AND
INSTALLATION
Unloading and Unpacking
NOTE
If shipping carton is damaged upon receipt, request carriers
agent be present during unpacking and inspection of the
system.
Upon receipt of the equipment, inspect the shipping container for damage. If the container or the
cushioning material is found damaged, they should be kept until the contents of the shipment have been
verified for completeness and the equipment has been inspected for mechanical and electrical defects. If the
contents are incomplete or if there is a mechanical or electrical defect, please notify:
SUMMATION RESEARCH, INCORPORATED
3950 Dow Road
Melbourne, Florida 32934
2.2
Receiving Documentation
Each STR-1800 radio is shipped with a packing slip. The packing slip should be carefully checked against
the contents of the shipping container.
2.3
Installation and Connection Requirements
The STR-1800 has Six (6) connectors. These are:
1)
2)
3)
4)
5)
6)
Primary Power
Antenna
Audio/control
Programming/diagnostic
Unused Rear DB25
Unused Rear Phono Jack
After carefully reviewing the connector and signal descriptions below, the user should establish all
connections, making sure that the primary power input is turned off at the source. Once all interconnections
are in place, primary power may be applied.
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2.4
STR-1800 O&M Manual
Connector Descriptions and Signal Definitions
This section describes the types of connectors used on the STR-1800 and provides the definition of the
signals associated with each.
2.4.1 Primary Power
The Primary Power connector is located on the rear of the STR-1800 and is attached to the unit itself via
approximately 6 inches of 14 gage wire. Characteristics of this connector are as indicated in the following
table.
Table 2 Primary Power Connector Characteristics
PARAMETER
VALUES
Part number
Tyco/AMP Electronics P/N 172129-1
Female housing with male contact pins
Pin Assignments
When viewing contacts as a T, top horizontal pin is
+13.6 VDC while vertical descending pin is Ground
Input Voltage Range
13.6 VDC +/- 15%
Current Drain
9 Amps maximum
Connector to Radio Color Coding
13.6 VDC Contact – Red
Ground Contact - Black
2.4.2 Antenna
The Antenna connector is located on the rear of the STR-1800 and is mounted directly to the main housing
of the radio. Characteristics of this connector are as indicated in the following table.
Table 3
Antenna Port Connector Characteristics
PARAMETER
VALUES
Connector Type
UHF PL-259 Type Female
Antenna Impedance
50 Ohms
Maximum Output Power
45 Watts
Output Frequency Range
STR-1820: 400-470 MHz
Consult factory for future versions
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2.4.3 Audio/Control
The Audio/Control connector is located on the front of the STR-1800 and is mounted directly to the front
panel mold of the radio. Characteristics of this connector are as indicated in the following table.
Table 4
Audio/Control Connector Characteristics
PINS (+/-)
SIGNAL
Connector Part Number
DB-25 Female
Mating (User Supplied) Connector Part Number
DB-25 Male
The following table defines the signal contents of all assigned pins on this connector
Table 5
PIN
SIGNAL
Audio/Control Connector Pin Assignments
DESCRIPTION AND CHARACTERISTICS
Audio Isolated Ground
Ground for the audio inputs/outputs of the radio
Receive Audio
Recovered audio signal output from the radio.
Channel Select 3
Control signal which when combined with Channel Select
0/1/2 forms a 4-bit binary channel selection control.
RXD+
Future RS485 digital interface
Push-to-Talk (PTT)
Places the radio into transmit mode when low (i.e.,
grounded) or receive mode when high or floating.
RXD-
Future RS485 digital interface
11
Audio Isolated Ground
Ground for the audio inputs/outputs of the radio
14
Channel Select 2
See pin 5 description above
17
Transmit Audio
Audio signal input to the radio when transmit operation is
active.
18
Channel Select Lines Ground
Ground for the Channel Select 0/1/2/3 lines
19
Channel Select 0
See pin 5 description above
21
PTT Isolated Ground
Ground for the PTT signal
23
Channel Select 1
See pin 5 description above
24
TXD+
Future RS485 digital interface
25
TXD-
Future RS485 digital interface
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Pins not listed within this table are all defined as no connects.
For the channel select lines described above, the following table defines the control functions of these
inputs.
Table 6
Channel Selection Control Settings
FRONT PANEL 25 PIN D SIGNAL STATES
DEFINITION
CHANNEL
SELECT 3
CHANNEL
SELECT 2
CHANNEL
SELECT 1
CHANNEL
SELECT 0
High
High
High
High
Select Chan 1
High
High
High
Low
Select Chan 2
High
High
Low
High
Select Chan 3
High
High
Low
Low
Select Chan 4
High
Low
High
High
Select Chan 5
High
Low
High
Low
Select Chan 6
High
Low
Low
High
Select Chan 7
High
Low
Low
Low
Select Chan 8
Low
High
High
High
Select Chan 9
Low
High
High
Low
Select Chan 10
Low
High
Low
High
Select Chan 11
Low
High
Low
Low
Select Chan 12
Low
Low
High
High
Select Chan 13
Low
Low
High
Low
Select Chan 14
Low
Low
Low
High
Select Chan 15
Low
Low
Low
Low
Select Chan 16
2.4.4 Diagnostic/Programming
The diagnostic/programming interface provides 3 different interfaces into the radio as follows:
1) RS-232 serial port interface for status/control and reprogramming of the modem processor
contained on the MDC of the design.
2) USB universal serial bus interface for the same purpose to the MDC modem processor.
3) A full duplex interface with power to a remote front panel for the unit.
The pinouts associated with this connector are as follows:
Table 7
Reference Input Connectors
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STR-1800 O&M Manual
Signal
DESCRIPTION AND CHARACTERISTICS
RD (Input)
Data input to radio. RS-232 electrical levels.
Conn Key
A stubbed (i.e.; filled) pin location which prevents users from
connecting a standard UART DB-9 cable into the radio.
TD (Output)
Data output from radio. RS-232 electrical levels.
RFPDO
Remote front panel data output. TTL electrical levels.
GND
Ground
USBD+
Universal serial data bus positive. USB electrical levels.
USBD-
Universal serial data bus negative. USB electrical levels.
RFPDI
Remote front panel data input. TTL electrical levels.
RFP+8 V
Remote front panel +8 Volt output. DC output power.
As identified in the section that follows this, these interfaces should only be used with cable assemblies
provided by SRI.
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SECTION 3
OPERATION
Operation of the STR-1800 is accomplished by utilizing a special software program to configure the radio
for the proper configuration and then connecting the system into the target platform for audio data
transmission and reception.
The following sections describe the STR-1800 operations from the perspective of configuring the unit for
the proper radio channel characteristics prior to final system installation.
3.1
Minimum System Requirements
This package requires a PC executing under the Windows XP or Windows 7 operating system.
3.2
Software Installation
The control software for the STR-1800 is provided as a standard installation program from the factory.
Executing this program activates a standard windows software installation process with full instructions as
to required user actions. The installation will create the program “STR1800.exe” in the specified install
directory.
3.3
Conventions
The STR-1800 control software supports standard Windows type operation, including menu based selection
processes. The STR-1800 control program utilizes Labview, a software package from National Instruments.
The install directory also contains other support files associated with the run-time version capability
required of Labview for the control program.
3.4
Getting Started
3.4.1 Radio Interconnect
Before taking any actions from the control program with an STR-1800 radio, the radio must be connected
to a primary power source and to the PC via a special programming interface cable and adapter. The exact
configuration and cable assembly number used varies based on the type of user.
Field users are limited to controlling channel specific information including frequency, transmit power
level (Hi, Med, Lo), operational mode (V.23 analog or future), and channel bandwidth (currently 12.5 or 25
KHz). The configuration for these users is as shown below.
Figure 3
Field Radio to PC Interconnect Configuration
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Factory users are allowed to control radio settings pertaining to
output power level calibration. The following figure depicts this
expanded configuration.
Figure 4
Factory Radio to PC Interconnect Configuration
For either mode, the 13.6 VDC power supply need only support the radio operation in a quiescent mode
(i.e., < 0.7 A).
3.4.2. Power-on Sequence
Once the above configuration has been established, the primary power supply and PC should be powered
on and initialized. The power up sequence of the radio versus the PC is not critical. However for the factory
configuration the 30-STR-1800-01 cable assembly must be connected to the radio prior to powering on the
radio. In this configuration the primary power will cause the remote front panel unit display to activate and
display configuration information. No such indication is available on the field configuration
3.4.3. Reading the Radio Configuration
Assuming the above process is successful, the user can proceed to activate the STR1800.exe program. This
will result in the following sample screen on the PC’s monitor.
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Figure 5
Control Software Initial Screen
If this is the first time the program is being utilized or if the operator has changed the PC’s serial
communications port being utilized, the first action taken by the user should be to establish the correct port
selection. This can be accomplished by doing a menu selection from the “Radio Comm Port” selection.
After this action, the user may select “Get All”. This will cause the software to interrogate the
interconnected STR-1800 and then update the displayed fields. The Serial Number field should reflect the
five (5) digit serial number from the product label on the STR-1800. The model number will indicate the
specific model of the radio and the various version numbers will reflect the hardware and software versions
of the radio.
The main part of the screen indicates the current settings for the sixteen (16) preset channel selections of
the radio. This includes the channel frequency, bandwidth (i.e., wideband at 25 KHz or narrowband at 12.5
KHz) and output power level (i.e., “High” of 30 Watts, “Medium” (Undefined) or “Low” of 5 watts.).
3.4
Altering the Radio Configuration
3.5.1 Changing Individual Channel Settings
Once a radio has been read as described above, the channel configuration fields may be edited. The
frequency field may be changed by selecting appropriate field and holding it to show a menu list of all
available frequencies. Radios may be factory programmed for up to 512 frequencies. The frequencies of all
defined items will be displayed when the field is selected. The bandwidth and power selections are toggle
controls operate in a similar manner.
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After establishing the changes to all channel settings, the user should select “Send All”. The system will
again interrogate the radio as to its current settings, modify the channel configurations according to the
edited fields, and then write the new configuration back to the radio.
By interrogating the radio again prior to modifying its settings, the software insures the correct
configuration update even if a new radio has been connected to the PC since the last read radio action. As
such, a user may establish a channel configuration and then write the data to multiple radios simply by
connecting a new radio to the PC and invoking “Send All”. The fields on the screen will be updated each
time this action is taken.
3.5.2 Saving/Restoring Channel Parameters
This capability of the control program will be added on a future release.
3.5.3 Power Output Control
This capability of the control program will be added on a future release.
3.6
Radio Operation
Having established the proper channel configuration for the radio, the STR-1800 is now ready for target
platform installation. The following operational considerations should be noted:
1)
Radios take up to 5 seconds to boot up.
2)
Radios which are powered up with an active push-to-talk condition will not operate until the pushto-talk is removed and stay’s in a non-active condition for a period of 2 seconds.
3)
On initial power up or on any change of the frequency select lines into the radio, the target
frequency setting may take up to 100 msec to obtain.
4)
If push-to-talk is active at any time during the tuning period outlined in note 2 above, the tuning
action will not complete until push-to-talk is removed and stay’s in a non-active condition for a
period of 2 seconds.
5)
Radios which have a push-to-talk condition activated for more than 15 seconds will automatically
shut down transmit operation and stay inactive until push-to-talk returns to a non-active condition
for a period of 2 seconds.
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SECTION 4
MAINTENANCE
In order to ensure that the STR-1800 system is always ready for operation, it should be checked
periodically so that potential defects may be discovered and corrected before they develop into any serious
damage or system failure. A minimal preventive maintenance program will significantly increase the
systems life span.
This section describes the necessary preventive maintenance checks and tests the user can perform to easily
identify most defects and problems. Any other defects or problems discovered during the normal operation
of the system should be noted for future corrective measures.
CAUTION
Stop the operation of the system immediately if a problem is noted during
normal operation which can otherwise damage the system.
This section also describes the corrective maintenance checks that can be performed on the STR-1800
system.
4.1
Maintenance Concept
The maintenance concept for the STR-1800 system is limited to the removal and replacement of the entire
unit.
4.2
Preventive Maintenance Requirements
The following is a recommended timetable for performing preventive maintenance checks on the STR1800.
CAUTION
Primary power to the radio must be turned OFF when
performing preventive maintenance on the equipment
4.2.1 Inspection
The STR-1800 system should be inspected periodically for defects or physical damage developed during
operation. Inspect all the interface cables to and from the system for cracks, breaks and proper seating with
their mating connectors on the card. Inspect all cables for frayed, broken or damaged wires. In addition,
inspect all STR-1800 connections for accumulation of dirt, grease, or any foreign material that can cause a
non-connection. If a cable is found damaged or non-repairable, it should be replaced before operating the
system again.
Inspection should be performed at least once every month. The frequency of inspection should be increased
for units exposed to dusty or heavy particulate environments.
5.2.2 Cleaning
Clean the outside surfaces and areas around the connectors periodically. Clean the surfaces with a clean,
soft, lint-free cloth. Clean the areas around the connectors with a soft bristle brush. To remove grease,
fungus, or corrosion, use a cloth dampened with an appropriate electronics cleaning fluid. Cleaning should
be done at least once every month. The frequency of cleaning should be increased for units exposed to
dusty or heavy particulate environments.
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70-STR1800-00 Rev A
STR-1800 O&M Manual
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SRI
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