Aeroflex / Weinschel 8314 X WLAN Simulator Operation & Installation Manual
Below you will find brief information for WLAN Simulator 8314 X. The WLAN Simulator Subsystem is available in two frequency ranges and is used to simulate the connectivity between a mobile running along a line of 3 base stations. Each of the three base stations have an individually controlled attenuator, which are then combined, and passed thru a fourth attenuator used to set the offset level. The attenuators are digitally controlled pin-diode absorptive attenuators, with a range of 0-63.75 dB in 0.25 dB steps. The system supports a “raw data mode”, in which the data tables are filled via external file download. This allows the unit to support any arbitrary attenuation profile.
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Model 8314-X
Operation & Installation Manual
Model 8314-X
WLAN Simulator Subsystem
(P/N 193-8132-X)
Firmware V2.0
This documentation may not be reproduced in any form, for any purpose unless authorized in writing by Aeroflex / Weinschel, Inc.
© Aeroflex / Weinschel, Inc.
Frederick, Maryland
2008
1
SAFETY SUMMARY
SAFETY SUMMARY
DEFINITIONS.
The following definitions apply to WARNINGS,
CAUTIONS, and NOTES found throughout this manual.
WARNING
An operating or maintenance procedure, practice, statement, condition, etc., which, if not strictly observed, could result in injury and/or death of personnel. Do not proceed beyond a WARNING symbol until all the indicated conditions have been fully understood and/or met.
CAUTION
An operating or maintenance procedure, practice, statement, condition, etc., which, if not strictly observed, could result in damage or destruction of the equipment or long-term health hazards to personnel.
Do not proceed beyond a CAUTION symbol until all the indicated conditions have been fully understood and/or met.
NOTE
An essential operating or maintenance procedure, condition, or statement that must be highlighted.
GENERAL PRECAUTIONS.
The following are general precautions that are not related to any specific procedure and, therefore, do not appear elsewhere in this publication. These are precautions that personnel must understand and apply during various phases of instrument operation or service.
WARNING
• Potentially lethal voltages are present in this instrument. Serious shock hazards from voltages above 70 volts may exist in any connector, chassis, or circuit board. Observe the following precautions:
• To minimize shock hazard, the instrument chassis must be connected to an electrical ground. Using the supplied three-conductor power cable ensures that the instrument can be firmly connected to the ac power source and electrical ground at a grounded power outlet. If using a 3-2 wire adapter be sure to connect the ground lead to earth ground.
• Use the buddy system any time work involving active high voltage components is required. Turn
OFF the power before making/breaking any electrical connection. Regard any exposed connector, terminal board, or circuit board as a possible shock hazard. DO NOT replace any component or module with power applied.
• If test conditions to live equipment are required, ground the test equipment before probing the voltage or signal to be tested.
• Personnel working with or near high voltage should be familiar with modern methods of resuscitation.
• DO NOT wear jewelry (rings, bracelets, metal watches, and/or neck chains) while working on exposed equipment. Be very cautious about using hand tools near exposed backplanes, bus bars, and/or power supply terminals. Use properly insulated tools. When making test connections to the power supply terminals and bus bars, use only insulated probe tips.
• Verify that the instrument is set to match the available line voltage and the correct fuse is installed.
• DO NOT install substitute parts or perform any unauthorized modification to this instrument.
Contact Weinschel Corporation to acquire any information on replacement parts or returning the instrument for repair. Unauthorized modification can cause injury to personnel and/or destruction of the instrument.
• Operating personnel must not remove instrument covers. Component replacement or adjustments
MUST BE performed by qualified service personnel.
• DO NOT operate the instrument near or in the presence of flammable gases or fumes.
DETAILED PRECAUTIONS.
The following WARNINGS, CAUTIONS and NOTES appear throughout the text of this manual and are repeated here for emphasis.
i
ii
SAFETY SUMMARY
CAUTION
• All procedures and/or steps identified as must be followed exactly as written and according to industry accepted ESDS device handling procedures. Failure to comply WILL
RESULT in ESDS damage.
• DO NOT use a nylon bristle brush in the solvent as the bristles may dissolve and cause damage to the circuit card or component.
• DO NOT use ultrasonic cleaning on parts or assemblies containing electrical or electronic components.
• DO NOT bend pins of electrical connectors when using fiber-bristle brush.
• Compressed air used for cleaning and/or drying can create airborne particles that may enter the eye. Goggles/faceshields should be worn. DO
NOT direct air stream towards self or other personnel. Pressure should be restricted to a maximum of 15 psi to avoid personal injury.
• Under no circumstances should a wire brush, steel wool, or abrasive compound be used on any surface. Using these items will cause extensive damage to the instruments surface.
NOTE
DO NOT return any instrument or component to
Weinschel Corporation without receiving prior factory authorization.
SAFETY SYMBOLS.
The following symbols are used to identify safety hazards found throughout this publication and/or located on the instrument.
CAUTION
HIGH VOLTAGE
WARNING
HIGH
VOLTAGE
Model 8314-X
TABLE OF CONTENTS
IM-477
1. GENERAL INFORMATION ................................................................................................................................................. 4-7
1-1. PURPOSE ........................................................................................................................................................................................... 4
1-2. SCOPE ............................................................................................................................................................................................... 4
1-3. EQUIPMENT DESCRIPTION .......................................................................................................................................................... 4
1-4. UNPACKING AND INSPECTION ................................................................................................................................................... 4
1-5. RESHIPMENT INSTRUCTIONS ..................................................................................................................................................... 5
1-6. STORAGE INSTRUCTIONS ............................................................................................................................................................ 5
1-7. RELATED MANUALS ..................................................................................................................................................................... 6
1-8. ELECTROSTATIC DISCHARGE SENSITIVE ................................................................................................................................ 6
1-9. SAFETY CONSIDERATIONS .......................................................................................................................................................... 6
1-10. POWER REQUIREMENTS ............................................................................................................................................................ 6
2. FRONT & REAR PANEL CONNECTORS & INDICATORS .......................................................................................... 7-11
2-1. POWER ENTRY MODULE ASSEMBLY ..................................................................................................................................... 7-8
2-2. MOBILE & BASE STATION PORT CONNECTORS ..................................................................................................................... 8
2-3. FRONT PANEL LEDS ...................................................................................................................................................................... 8
2-4. EXTERNAL CONTROLS (REAR-PANEL BNC) ........................................................................................................................... 8
2-5. ETHERNET CONTROLLER LEDS & HARDWARE SETTINGS ............................................................................................ 8-11
2-5.2. HARDWARE CONFIGURATION SWITCH SETTINGS ............................................................................................ 9-10
2-5.3. CONNECTOR PINOUTS ................................................................................................................................................. 11
3. COMMUNICATIONS ........................................................................................................................................................... 12
4. SIMULATION PARAMETERS & OVERVIEW .............................................................................................................. 13-14
5. PROGRAMMING .............................................................................................................................................................. 15-23
5.1. SIMULATION PARAMETERS ............................................................................................................................................. 15-17
5-2. SIMULATION CONTROL ..................................................................................................................................................... 18-19
5-3. SIMULATION DATA/DIRECT IO ........................................................................................................................................ 20-24
5-4. NETWORK CONTROL .......................................................................................................................................................... 24-25
5-5. HARDWARE CONTROL ............................................................................................................................................................ 25
6. MAINTENCE ..................................................................................................................................................................... 28-30
6-1. INSPECTION ................................................................................................................................................................................... 28
6.2. PREVENTIVE MAINTENANCE .................................................................................................................................................... 28
6.3. SPECIAL CLEANING INSTRUCTIONS ....................................................................................................................................... 28
6-3.1. MICROWAVE COAXIAL CABLE ASSEMBLIES ............................................................................................................ 28
6-3.2. CIRCUIT CARDS AND MODULES ................................................................................................................................... 28
6-3.3. MACHINED SURFACES AND HARDWARE ................................................................................................................... 29
6-3.4. CHASIS CLEANING ............................................................................................................................................................ 29
6-3.5. CONNECTOR CLEANING .................................................................................................................................................. 29
6.4. LINE VOLTAGE FUSE REPLACEMENT ..................................................................................................................................... 30
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Model 8314-X IM-477
7. REPLACABLE PARTS LIST ................................................................................................................................................. 31
7-1. UNDERSTANDING REFERENCE DESIGNATORS .................................................................................................................... 31
7-2. ORDERING INFORMATION ......................................................................................................................................................... 31
7-3. DRAWING NUMBER ..................................................................................................................................................................... 31
7-4. REPLACABLE PARTS LIST .......................................................................................................................................................... 31
7-4.1. REFERENCE DESIGNATOR .......................................................................................................................................... 31
7-4.2. DESCRIPTION ................................................................................................................................................................. 31
7-4.3. PART NUMBER ............................................................................................................................................................... 31
7-4.4. VENDOR PART NUMBER ............................................................................................................................................. 31
7-5.5. CAGE CODE .................................................................................................................................................................... 31
7-4.6. ASSEMBLY AND COMPPONET LOCATION .............................................................................................................. 31
8314-1 WLAN SIMULATOR SUBSYSTEM REPLACEABLE PARTS LIST (P/N 93-8132-1) ...................................................... 32-33
8314-2 WLAN SIMULATOR SUBSYSTEM REPLACEABLE PARTS LIST (P/N 93-8132-2) ...................................................... 34-35
8. CONTACTING AEROFLEX / WEINSCHEL. ..................................................................................................................... 36
9. AEROFLEX / WEINSCHEL WARRANTY ........................................................................................................................ 36
10. ASSEMBLY/WIRING DIAGRAMS
MODEL 8314-1 ASSEMBLY DRAWING ............................................................................................................................... 193-8132-1
MODEL 8314-2 ASSEMBLY DRAWING ............................................................................................................................... 193-8132-2
MODEL 8314-1 WIRING DIAGRAM ........................................................................................................................................ 193-8133
MODEL 8314-2 WIRING DIAGRAM ........................................................................................................................................ 193-8134
MODEL 8314-1 INTERFACE CONTROL DRAWING (SPECFICATIONS) ............................................................................ 089-4037
MODEL 8314-2 INTERFACE CONTROL DRAWING (SPECIFICATIONS) ......................................................................... 089-4038
Aeroflex / Weinschel 3
Model 8314-X
1. GENERAL INFORMATION:
IM-477
1-1 PURPOSE: This manual contains setup and operation information for the Aeroflex / Weinschel’s 8314 WLAN
Simulator Subsystem (P/N 193-8132-X). The manual also provides component location, reference designators, part numbers, and nomenclature to identify all the assemblies and sub-assemblies of the WLAN Simulator Subsystem.
1-2 SCOPE: This manual is to be used in conjunction with the operation and maintenance of a 8314 WLAN Simulator
Subsystem. The manual also provides a description of each assembly; assembly parts list; block diagrams: and general maintenance procedures to maintain the instrument.
1-3 EQUIPMENT DESCRIPTION: The WLAN Simulator Subsystem (8314) is available in two frequency ranges and is used to simulate the connectivity between a mobile running along a line of 3 base stations. Each of the three base stations have an individually controlled attenuator, which are then combined, and passed thru a fourth attenuator used to set the offset level. The attenuators are digitally controlled pin-diode absorptive attenuators, with a range of 0-63.75 dB in 0.25 dB steps. Refer to the RF Block Diagram below:
BS1
ATTN 1
(0-63dB)
BS2
BS3
ATTN 2
(0-63dB)
ATTN 3
(0-63dB)
3:1
ATTN 4
(0-63dB)
M O BILE
1-4. UNPACKING AND INSPECTION: Upon unpacking the equipment, retain the shipping container and packing material for future shipment for recalibration. Perform the following initial inspection: a. Carefully look at the outside of the shipping container for discoloration, stains, charring, or other signs of exposure to excessive heat, moisture, or liquid chemicals. Check for any physical damage to the shipping container such as dents, snags, rips, crushed sections or areas, or similar signs of excessive shock or careless handling. b. With the equipment and any accessory package removed from the shipping container, check each item against the packing list or Items Supplied List. If any items are missing, contact the Aeroflex / Weinschel
Corporation Customer Service Department. c. Carefully inspect the equipment looking for dents, deep scratches, damaged or loose connector, or any other d. signs of physical abuse or careless handling. If damage is found, forward an immediate request to the delivering carrier to perform an inspection and prepare a concealed-damage report. DO NOT destroy any packing material until it has been examined by an agent of the carrier. Concurrently, report the nature and extent of damage to Weinschel Corporation, giving equipment model and serial numbers, so that necessary action can be taken. Under U.S. shipping regulations, damage claims must be collected by the consignee;
DO NOT return the equipment to Aeroflex / Weinschel, Inc. until a claim for damages has been established.
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Model 8314-X IM-477
1-5. RESHIPMENT: Use the best packaging materials available to protect the unit during storage or reshipment.
When possible, use the original packing container and cushioning material. If the original packing materials are not available, use the following procedure: a. Wrap the storage cases in sturdy paper or plastic; b. Place the wrapped storage cases in a strong shipping container and place a layer of shock-absorbing material
(3/4 inch minimum thickness) around all sides of the unit to provide a firm cushion and to prevent movement inside the container. c. If shipping the unit for service, attach a tag to indicate:
1. model and serial numbers
3. description of malfunction
5. authorization to conduct repairs
6. return authorization number d. Thoroughly seal the shipping container and mark it FRAGILE. Ship to:
Aeroflex / Weinschel, Inc.
Attn: Customer Service Department
5305 Spectrum Drive
Frederick, MD 21703-7362 or to an authorized sales representative.
1-6. STORAGE: Storage of the Model 8314 WLAN Simulator Subsystem is possible for extended periods without incurring damage to internal circuitry if the 8314 Series is packaged according to the instructions above. The safe limits for storage environment are as follows:
Manual
H4-1 and H4-2
Temperature: 67° to +167 °F (-55° to +75 °C)
Humidity: less than 95% without condensation
Altitude: Up to 40,000 feet
1-7. RELATED MANUALS: The following manuals contain information that may be used in conjunction with this manual to operate, service, or calibrate this instrument.
Title
Federal Supply Code for Manufacturers Cataloging Handbook
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Model 8314-X IM-477
1-8. ELECTROSTATIC DISCHARGE SENSITIVE: The equipment documented in this manual contains certain
Electrostatic Discharge Sensitive (ESDS) components or parts. Therefore, certain procedures/steps are identified by the use of the symbol . . This symbol is used in two ways:
CAUTION
All procedures and/or steps identified as must be followed exactly as written and according to accepted ESDS device handling procedures. Failure to comply WILL RESULT in ESDS damage. a. When the ESDS symbol is placed between a paragraph number and title , all of that paragraph, including all subparagraphs, is considered ESDS device handling procedure. b. When the ESDS symbol is placed between a procedure/step number and the text , all of that procedure is considered an ESDS device handling procedure.
1-9. SAFETY CONSIDERATIONS: The WLAN Simulator Subsystem and all related documentation must be reviewed for familiarization with safety markings and procedures before any operation and/or service. Refer to the SAFETY
SUMMARY located at the beginning of this manual for a summary of safety information and procedures. Following these simple safety precautions will ensure safe operation and service of the WLAN Simulator Subsystem.
1-10. POWER REQUIREMENTS: Aeroflex / Weinschel supplies a detachable power cable (P/N 068-21) to connect an 100 to 240 Vac power source with a frequency between 50 to 60 H Z to the WLAN Simulator Subsystem. To minimize shock hazard, the instrument chassis must be connected to an electrical ground. Using the supplied threeconductor power cable ensures that the instrument can be firmly connected to the ac power source and electrical ground (safety ground) at a grounded power outlet. Refer to paragraph 4-2 (Initial Setup) before applying any power to the instrument.
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Model 8314-X IM-477
2. FRONT & REAR PANEL CONTROLS & INDICATORS:
The following paragraphs provide a description of the connections that can be made to the 8314 WLAN Simulator
Subsystem. Figure 1 shows the location of these connectors.
WARNING
Sufficient power levels are present at the Power Input Assembly to cause personal injury.
Ensure that the instrument power cord is DISCONNECTED before attempting to change fuses.
Figure 1. Front & Rear Panel Connectors & Indicators
2-1 POWER ENTRY MODULE ASSEMBLY: The Power Entry Module Assembly located on the rear panel contains a three-prong ac power input connector and a fuse drawer assembly (Figure 1). The Fuse Drawer Assembly contains the line voltage fuse (Aeroflex / Weinschel P/N 052-1-1.5). The Model 8314 uses a T 1.5A, 250 Vac fuse which is 5 x
20 mm in size. Refer to paragraph 8-XXX for replacement of the fuse.
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Model 8314-X IM-477
The AC Power Connector, located on the left side of XF1 (Figure 1), is a plug-type, prong insert connector with three conductors for connection of the power cord (P/N 068-21) to the Power Supply Assembly located within the WLAN
Simulator Subsystem. This connector also grounds the chassis of the WLAN Simulator Subsystem when the the ac power cord is connected to a grounded wall outlet. If necessary, use a three prong to two prong adapter and connect the adapter’s ground lead to the outlet plate retaining screw.
The Power ON/OFF Switch is located on the rear panel and in part of the Power Entry Module Assembly. Placing the
POWER ON/OFF switch in the ON position applies power to the instrument.
CAUTION
When applying an RF signal to the RF INPUT connector, DO NOT exceed the maximum allowable power level specifications of the Model 8314.
2-2. MOBILE & BASE STATION PORT CONNECTORS: There are three BASE STATION Ports location on the rear panel and a Mobile Port on the front panel. These Type N female connectors provide a input and output ports where RF signals can be applied to the devices internally mounted in the Model 8314.
2-3. FRONT PANEL LEDS: There are four leds plus a PWR indicator which are shown on the front panel:
FP LED FUNCTION
EXT TRIG When on, the trig mode is set to external. When off, trig mode is internal.
ARM
RUN
When on, the system is awaiting a trigger event. Goes off when trig received.
System has been triggered and is running. Goes out when sweep ends.
ERROR One or more of the setup parameters is invalid, and unable to run.
PWR Indicates that external power is applied to the unit.
2-4. EXTERNAL CONTROL CONECTORS: These BNC female connectors are located on the rear panel. The table below outlines each connector’s parameters:
CONTROL CONNECTOR PARAMETERS
EXT TRIG INPUT
STATUS OUTPUT
(simulation RUN state)
TTL/CMOS compatible schmitt-trigger
Max input voltage range: -0.5V to +5.5V
High-level input voltage VIH: +2.1V minimum
Low-level input voltage VIL: +0.5V maximum
Internal 10 K
Ω
resistive pullup to +5V
ESD and current limit protected
Programmable polarity
High-level output voltage VOH +4.8V @ IOH=-50µA (RUNNING)
+3.2V @ IOH=-5mA
Low-level output voltage VOL +0.2V @ IOL=50µA (STOPPED)
+1.4V @ IOL=5mA
ESD and current limit protected
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Model 8314-X IM-477
2-5. ETHERNET CONTROLLER LED’s & HARDWARE SETTINGS: The following paragraphs provide a description for each of the rear panel Ethernet LEDs, hardware settings for the internal Ethernet controller card and signal – pin locations for the 10BaseT and RS232 connectors. Figure 1 shows the location of these connectors.
2-5.1 STATUS LEDs:
LED FUNCTION
SYS
ERR
Indicates that the Ethernet controller is enabled for operation in the system.
This LED flashes during boot and remains on during normal operation of the switch.
Indicates that a serious error has occurred during system boot.
ACT
LINK
Indicates that activity is occurring over the 10BaseT Ethernet RJ-45 interface.
This LED flashes as transmit/receive activity occurs.
Indicates that the Ethernet port has established a valid link with the network.
TX This LED flashes as the Ethernet Controller transmits data via the RS232
Console port.
RX This LED flashes as the Ethernet Controller receives data via the RS232
Console port
2-5.2. Hardware Configuration Switch Settings: Figure 2 is provided for component location for the switches,
LEDs, connectors on the Ethernet controller card.
Aeroflex / Weinschel
Figure 2. Ethernet Controller Card Switch/LED/Connector locations
9
Model 8314-X
SW4 – Option Select
Default off off off 3 BR1 Baud Rate Select
(see below)
BR0 Baud Rate Select
Baud Rate Select
BR0 BR1 Rate
0 0 9600
1 0 19200
0 1 38400
1 1 57600
SW3 – System Configuration
Name Description
3
4 off
LS2 Load Sequence Override (see below)
LS1 Load Sequence Override
Memory Select
Default off off off off
1
0
1
0
1
1
External ROM card
Emulation mode (reserved)
Emulation mode (reserved)
Load Sequence Override
Aeroflex / Weinschel
1
1
0
1 run RomMon w/WDOG disabled
Normal sequence w/WDOG disabled
SW2 – Serial Port Hardware Control
Name Description
1 CTST RS422 Mode CTS Termination
Off – no termination
On – 120 ohm termination
2 RXDT RS422 Mode RXD Termination
Off – no termination
On – 120 ohm termination
3 RTSS RS422 Mode RTS line
Off – RTS+ not connected
On – RTS+ connected
4 MODE Serial Port Mode
Off – RS232
On – RS422
Default off off off off
IM-477
10
Model 8314-X IM-477
2-5.3 Connector Pinouts: The Ethernet controller card contains a 10BaseT (RJ-45) and a RS232 (DB9M) Console connector that are mounted to the rear panel. There is also a table included for Internal Bus Connector, J8 located on the Ethernet Controller card (DIN-96). Pin-outs for these connectors are as follows:
Serial Port Connector (DB9M)
RS232
9-pin DB9
Pinout
DSR
RTS
CTS
RI
6
7
8
9
3
4
1
2
5
DCD
RxD
TxD
DTR
GND
PIN NO RS232 RS422
Aeroflex / Weinschel
10Base-T Ethernet Port (RJ-45)
PIN NO 10Base-T
1 TD+
2 TD-
3 RD+
4 Unused**
5 Unused**
6 RD-
7 Unused**
8 Unused**
** Unused pins on the RJ-45 have 75
Ω
/0.01µF to chassis to reduce noise.
11
Model 8314-X
3. COMMUNICATIONS:
IM-477
The system provides both RS-232 serial port and 10BaseT Ethernet operation.
The RS-232 port can operate at 9600, 19200, 38400, or 57600 baud rates, selectable via internal DIP switch.
Default format is 9600N81. The serial port uses a standard DB9 DTE connector pinout. Connection to a standard
PC’s serial port requires the use of a “null-modem” type cable to swap the transmit and receive data pair (pins 2 and
3). A command-line interface (CLI) will be provided for interactive use w/ a terminal emulator. The CLI can be disabled to facilitate use of the serial port as a programming interface. The CLI provides user prompts and supports simple line editing (via the BS key) , last command recall (Ctrl-P), and a simple help facility. Help can be accessed from the main command prompt using either the HELP or simply ‘?’. Additional help for many commands is available by specifying the main command followed by a ‘?’. For example, “SET ?” provides a list of the SET commands, and “SET FREQ ?” provides detailed info on the set frequency command.
Many commands and keywords allow abbreviated forms. Command abbreviations can be displayed using the
‘CMD ?’ help command. Also, there are some system level configuration/diagnostic commands, such as PING, that can be listed using ‘SYS ?’ help command. Many of these require system-level password access.
10BaseT Ethernet will provide TELNET access (port 23) to the CLI for operation over a network. In addition,
TFTP client will also be supported for performing code updates to the flash memory. Network parameters (IP address, subnet mask, TFTP host address, etc) can be set and stored/recalled from non-volatile memory. TFTP transfer is also used to support the download/upload of the raw data tables, due to the potential volume of information to be transferred. By default, the unit is configured for an IP address of 10.0.0.1, with a subnet mask of 255.255.255.0.
A NOTE ON PASSWORDS
Passwords are/can be used to prevent inadvertent configuration/switch changes. Password protection is, generally, weak, in that a user can see the current password using the ‘SHOW CONFIG’ command. In addition, there is a fixed password (the word SYSTEM) that can be used that will grant system-level access to many commands normally reserved for system testing/configuration.
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Model 8314-X
4. SIMULATION PARAMETERS AND OVERVIEW:
IM-477
(origin) startpos
BS1 gain ypos xpos xpos
M O BILE v elocity freq gain
BS2 gain ypos
BS3 gain ypos xpos distance stoppos
The above diagram shows the user-entered parameters. When a simulation is initiated, the parameters are validated, and the system builds its tables of attenuation setting vs time using the following relationship (Friis Transmission
Equation)
LinkLoss
=
⎛
⎜⎜
4
π
λ
R
⎞
⎟⎟
2
GtGr
where
R
=
ypos
2 +
xpos
2
and
λ
= wavelength
The system allocates a maximum of 10,000 data points for each attenuator for use over the entire simulation time, for a total of 30,000 data points. The data tables are pre-built prior to the start of the simulation run, and typically takes 3-4 seconds to complete.
When computing the data tables, the system notes the maximum signal level computed over the course of the simulation, which will occur when the mobile position is at Xpos1, Xpos2, or Xpos3, depending on the basestation gain and Ypos settings. This level, along with the nominal insertion loss of the unit, is used to set the Offset Attenuator
(ATTN4), whose value will not be changed over the course of the simulation. This offset will be subtracted from the loss calculations of the three base station attenuators ATTN1-ATTN3, allowing the full range of these attenuators to be used for the simulation in most cases. For basestation positions that are located far from the track, the Offset
Attenuator alone may not provide the reqd amount of attenuation, and this must be taken into account. For example, for f=2000MHz, ypos=100m, the loss is 78dB. Since there’s only 63dB range in ATTN4, the remaining 78-63=15dB will have to provided by the BS attenuator.
Simulation time is controlled via a 16-bit hardware timer/counter with 100nsec resolution , which provides a max count time of 6.5536ms, with no pre/post-scaling.The actual required update rate is a function of the simulation
distance, mobile velocity, and the maximum number of allocated data points. The distance and velocity determine the total simulation time:
Time
=
distance
(
m
)
velocity
(
m
/
s
)
The system enforces a maximum update rate of 1msec. If Time is less than 10 secs (10,000pts * 1ms/pt), then the update rate is fixed at 1msec, and the array size is reduced to cover the required time. If Time is greater than
10 secs, the entire 10,000 points are used, and the update rate is adjusted to cover the total simulation time.
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Model 8314-X IM-477
The system also supports a “raw data mode”, in which the data tables are filled via external file download. This allows the unit to support any arbitrary attenuation profile.
Operational Notes:
set trigger mode triggering can be set for INTernal or EXTernal. Ext trig is indicated on front-panel led.
set trig polarity external trig polarity can be set for active high (1) or active low (0) logic levels. Triggering is levelsensitive. Note that the EXT TRIG input is pulled high via a resistive pullup.
set sweep mode the simulation sweep can be set for SINgle or CONtinuous operation. In SINGLE mode, the simulation will be run one time when a trigger event occurs, and will then stop. In CONT mode, when the end of a simulation is reached, the simulation will be automatically restarted from the beginning, depending on the current trigger mode. If the system is set for external triggering, then the triggering subsystem is re-armed, and will wait for a new trigger event before continuing.
set/show
All parameters will have commands to set and query their current setting, as well as to be able to restore the default settings. Summary commands will also be available to view multiple related settings.
- run/stop simulation control
The RUN command initiates a simulation sweep. It performs the following:
1). All parameters are reviewed for validity. Note that while all the values are range-checked when they are entered, some parameter values are coupled, and cannot be validated until all parameters are entered. An example of this is the mobile position vs mobile distance. If the parameter values result in an invalid simulation, the run is aborted and the front-panel ERROR led is illuminated.
2). Assuming the parameters are valid, the attenuation vs time profile data is computed, and stored in internal tables. The triggering subsystem goes from the IDLE to the ARMED state, in which it waits for a trigger event to occur. The front-panel ARM led is illuminated.
3). If the trig mode is set to INTernal, the triggering subsystem automatically transitions from the
ARMED to the RUNNING state. For external triggering, the ARMED to RUNNING state transition occurs when the system detects the external trigger event. The front-panel RUN led is illuminated, and the external STATUS output is asserted high.
4). Simulation runs, with the basestation attenuators (1-3) being updated periodically over the course of the simulation.
5). When the end of the simulation is reached, if the sweep mode is SINGLE, then the simulation ends, the RUN led goes off, and the external STATUS output is low. Otherwise the triggering is rearmed, and the simulation goes to step 3. In the CONTinuous sweep mode, the simulation will be re-run until the STOP command is given.
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5. PROGRAMMING:
IM-477
5-1. Simulation Parameters:
In general, parameter ranges have been set to cover most real-world (and some not so real) conditions. The simulation can be run over a 20km total distance (12.4 miles), at speeds up to 320km/hr
(approx 200mph). The system will not attempt to limit the selection of parameters, with the exception that the mobile and basestation positions must be within the MOBILE DISTANCE (total simulation distance) setting. This allows the maximum flexibility, but note that it also allows the user to set up scenarios that are not very realistic, or that could result in extremely long simulation runs.
SET BASESTATION POSITION
Syntax
SET BASESTATION POSITION <select> <xpos> <ypos>
SET? BASESTATION POSITION <select>
Parameters
<select> basestation select (1-3)
<xpos> x-axis distance from the origin, in meters (0-20000)
<ypos> y-axis distance from the track, in meters (1-100)
Description
Sets the position of the selected basestation. The position along the X axis should be <= the MOBILE
DISTANCE setting. There are no restrictions on the order or positioning between the three base stations.
Example
SET BASESTATION POSITION 1 2500 50 sets the position of basestation 1 to 2500 meters from the start, at an offset of 50 meters
SET BASESTATION GAIN
Syntax
SET BASESTATION GAIN <select> <gain>
SET? BASESTATION GAIN <select>
Parameters
<select> basestation select (1-3)
<gain> gain factor, in dB (-10.0 to +10.0)
Description
Sets the antenna gain factor, in dB, for the specified basestation.
Example
SET BASESTATION GAIN 1 -1.5 sets the gain of basestation 1 to -1.5dB, providing loss
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SET MOBILE DISTANCE
Syntax
SET MOBILE DISTANCE <dist>
SET? MOBILE DISTANCE
Parameters
<dist> simulation distance, in meters (1-20000)
Description
Sets the total distance travelled for the simulation. Setting this parameter will automatically reset the
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MOBILE POSITION to cover the distance specified
Example
SET MOBILE DISTANCE 10000 sets the distance to 10000 meters
SET MOBILE VELOCITY
Syntax
SET MOBILE VELOCITY <vel>
SET? MOBILE VELOCITY
Parameters
<vel> velocity, in km/hr (1-320)
Description
Sets the speed of the mobile, in kilometers/hr
SET MOBILE GAIN
Syntax
SET MOBILE GAIN <gain>
SET? MOBILE GAIN
Parameters
<gain> gain factor, in dB (-10.0 to +10.0)
Description
Sets the antenna gain factor, in dB, for the mobile.
Example
SET MOBILE GAIN -1.5 sets the gain of mobile to -1.5dB, providing loss
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SET MOBILE POSITION
Syntax
SET MOBILE POSITION <startpos> <stoppos>
SET? MOBILE POSITION
Parameters
<startpos> x-axis starting distance from the origin, in meters (0-20000)
<stoppos> x-axis stopping distance, in meters
Description
Sets the mobile start and stop position, relative to the origin. Normally, these values would be set to cover the MOBILE DISTANCE setting. This command allows the user to travel over a portion of the total simulation distance. Note that changing this setting has no effect on the actual simulation data or update rate, as the data is based on the entire distance.
SET FREQ
Syntax
SET FREQ <mhz>
SET? FREQ
Parameters
<mhz> frequency, in MHz (2000-6000)
Description
Sets the current operating frequency for use by the loss calculations.
SHOW PARAM
Syntax
SHOW PARAM
Description
Displays the current setting of all the user-entered simulation parameters.
SAVE PARAM
Syntax
SAVE PARAM
Description
Saves the current setting of all the user-entered simulation parameters into non-volatile memory.
These settings will be recalled during next system bootup.
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5-2. Simulation Control
SET TRIGGER MODE
Syntax
SET TRIGGER MODE <mode>
SET? TRIGGER MODE
Parameters
<mode> trigger mode, INT or EXT
Description
Selects internal or external triggering for the simulation. With internal triggering, the simulation runs automatically after a RUN command is received. When external triggering is selected, the simulation will wait for an external trigger event before the simulation starts.
SET TRIGGER POLARITY
Syntax
SET TRIGGER POLARITY <pol>
SET? TRIGGER POLARITY
Parameters
<pol> active level, 0 or 1
Description
Sets the external trigger polarity level. Setting <pol>=0 sets an active-low external trigger, while a
<pol> of 1 sets an active-high trigger level. The external trigger input has a resistive pull-up, so that if trigger input is left unconnected it will default to a high level.
SET SWEEP MODE
Syntax
SET SWEEP MODE <mode>
SET? SWEEP MODE
Parameters
<mode> sweep mode, CONT or SINgle
Description
Sets the simulation sweep mode. In SINGLE mode, once a simulation is triggered the simulation will run once and then stop. If the sweep is set for CONTinuous operation, when the simulation reaches the end it will return to the armed state and await another trigger event.
RUN
Syntax
RUN [CALC]
Description
Initiates/computes a simulation run. In its basic form, the RUN command computes the attenuator data tables based on the entered parameters, and places the triggering subsystem in the armed state, awaiting a trigger event. If the optional CALC switch is specified, the command will only perform the calculations, and will not arm the trigger. This is useful if the user desires to view the simulation results prior to actually running the simulation.
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STOP
Syntax
STOP
Description
Stops a running simulation.
SHOW CALC
Syntax
SHOW CALC
Description
Displays various results of the simulation calculations, including total time, max levels, update rate, etc
SHOW STATUS
Syntax
SHOW STATUS
Description
Displays the current state of a simulation.
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Sets the simulation sweep mode. In SINGLE mode, once a simulation is triggered the simulation will run once and then stop. If the sweep is set for CONTinuous operation, when the simulation reaches the end it will return to the armed state and await another trigger event.
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5-3.
Simulation Data/Direct IO
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These commands provide access to the raw simulation data and control, and can be used to override or view the internal calculation data.
SET DATA CALC
Syntax
SET DATA CALC <mode>
Parameters
<mode> calc mode 0 or OFF, 1 or ON
Description
This command can be used to enable/disable the loss calculations. With calc off, the system allows the data tables to be filled with arbitrary data using the SET DATA, SET DATA TIMER, and SET
DATA POINTS commands.
NOTE: this is not a new command, but it now allows use of the parameters ON and OFF instead of just 0/1
SET DATA POINTS
Syntax
SET DATA POINTS <numofpts>
Parameters
<numofpts> number of data points (1-10000)
Description
Sets the number of data points to use for a simulation run in table mode. Each point must be filled using the SET DATA command
SET DATA
Syntax
SET DATA <pt> <attn1> <attn2> <attn3>
Parameters
<pt> data point number (0-10000)
<attn1> attenuator 1 setting, in dB
<attn2> attenuator 2 setting, in dB
<attn3> attenuator 3 setting, in dB
Description
Sets a data point for use in table mode (DATA CALC 0). Data point 0 is the initial setting at time
0. The range of the attn setting is dependant on the attenuator configuration, but is typically 0 to
63.75 in 0.25dB steps. Note: Control of the Offset Attn (Attn4) setting may be done using the
ATTN command
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SET DATA TIMER
Syntax
SET DATA TIMER <secs>
Parameters
<secs> simulation update rate, in secs (0.001-60.000)
Description
Sets the attenuator update rate in table mode. The total simulation time is determined from DATA TIMER * DATA POINTS
SHOW DATA
Syntax
SHOW DATA <startidx> <endidx> [FMT]
Parameters
<startidx> starting data array index (0-10000)
<endidx> ending data array index (0-10000)
[FMT] optional formatting flag
Description
Displays the simulation data array. The response shows the point number, and the data for each of the three attenuators at that point. The default format for the attenuation data is the integer programming word (0-255), which can be changed to display attenuation by using the optional FMT specifier
ATTN
Syntax
ATTN <select> <setting>
ATTN? <select>
Parameters
<select> attenuator select (1-4)
<setting> attenuation value, in dB (0-63.75)
Description
Directly sets an attenuator setting. This command is useful for testing and diagnostics.
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SET OFFSET ATTN
Syntax
SET OFFSET ATTN <setting>
SET? OFFSET ATTN
Parameters
<setting> attenuation value, in dB (0-63.75)
Description
Sets the Offset Attenuator value. The dB value specified in <setting> will be rounded to the resolution of the attenuator. This command is useful for setting an offset while using Data Table mode, and is equivalent to the
'ATTN 4 xx' command.
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FILL DATA
Syntax
FILL DATA <setting>
Parameters
<setting> attenuation value, in dB (0-63.75)
Description
Fills the data tables with the specified db value.
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SHOW TIME
Description
Shows current system time in hrs:min:secs.msec and elapsed time since last invocation. Useful for timing script execution.
SHOW ERROR COUNT
Description
Shows count of total errors since last invocation. Useful for script debugging.
Syntax
SHOW FILE [DATAFLASH:]
Description
This command can be used to display the status and contents of the dataflash: storage area
(including the name and size) if the optional 'DATAFLASH:' or 'DF:' parameter is specified.
Otherwise, it displays the status of both the flash: and dataflash: file storage areas, including header information, crc's, version, date, size, etc.
The first line of each section contains status information for each copy in the form 'Status (backup copy, working copy)'. A status of 0 indicates the file is valid, while <0 indicates an error was detected in the copy.
The remaining info is from the copy that is/will be in use. For example, flash: Status(-252, 0) indicates that there is a CRC error in the backup copy, while the working copy is ok.
EXECUTE SCRIPT
Syntax
EXECUTE SCRIPT [ECHO]
Description
This command executes the command script file stored in the dataflash: (df:) device. If the optional 'ECHO' keyword is provided, then the command will display the script on the current console device as it is executed.
The command script file may contain any executable command supported by the CLI. Lines are limited to
128 chars in length, and should end with an ascii CR (0x0d), LF (0x0a), or any combination of the two.
Comment lines are optional, and if usedmust begin with either an ascii single-quote character (0x27), or an ascii '/' char (0x2f).
Script files are stored into the dataflash: using the COPY TFTP command, and are limited to a maximum total length of 512K bytes. The current contents of the dataflash: can be viewed using the SHOW FILE DF: command.
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COPY source destination
Syntax
COPY TFTP:<url-filename> {FLASH: | DATAFLASH:}
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COPY {FLASH: | DATAFLASH:} TFTP:<url-filename>
Access-level : password
Description
Copies remote file identified by <url-filename> via TFTP to/from application flash: or dataflash: memory. The first argument is the source, the second is the destination. It allows the user to download an image from the network and save in flash, or upload an image from flash to the network server. By default, the transfer uses the host IP address specified by SET TFTPHOST. However, if the <url-filename> contains an IP address, the transfer will use this address instead.
For example, 'copy tftp://10.0.0.10/file.bin flash:' would attempt to download the file from the specified address of 10.0.0.10, ignoring the current TFTPHOST setting, if any.
Each of the data storage devices only reserve space for a single file, so any downloads will overwrite the current contents. As such, any filename parameters for the fl: and df: destinations are used strictly as placeholders.
The command accepts the abbreviations of 'FL:' and 'DF:' for the flash: and dataflash: devices, respectively.
ENABLE
DISABLE
Syntax
ENABLE
ENABLE <plain-text>
ENABLE PASSWORD <plain-text>
NO ENABLE PASSWORD
DISABLE
RECOVER PASSWORD
SHOW PASSWORD\0
see also: SET ACCESS SYSTEM
Access-level : all
Description
The mrs software provides two levels of access to commands: user and privileged. The unprivileged user mode is called 'user exec' mode. The privileged mode is called 'privileged exec' mode and normally requires entry via a password. The commands available in 'user exec' mode are a subset of the commands available in 'privileged exec' mode.
The ENABLE and DISABLE commands are used to enter and leave privileged exec mode, respectively. If a password has been set, the user will be prompted to enter in the password. Once entered, the prompt changes to 'mrs#' to show the current mode. You may bypass the 'password:' prompt by including the password along with the ENABLE keyword on the command line.
To set an access-level password, use the 'ENABLE PASSWORD <plain-text>' command, where <plain-text> specifies the desired password, and may be up to 11 chars in length. The password is stored in nvram. The command 'NO ENABLE PASSWORD' deletes the password and removes it from nvram storage, as long as you are in privileged mode.
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There is a password recovery feature that allows the user to view/erase the current password without being in privileged mode. This can be accessed only via a local serial port connection to the console, and will not work over a telnet connection.
To erase the password, you must first send an RS232 BREAK signal. You should see the console respond with the message '**BREAK** detected. Password recovery enabled'. Once password recovery is enabled, you can use the 'SHOW PASSWORD' command to display the current password, or you can send
'RECOVER PASSWORD', which will erase the current password setting. If successful, you will get the message 'Password reset'. Password recovery mode is automatically terminated after receipt of any two CLI commands, after which you will get an 'Access denied' error, and have to repeat the steps.
5-4. Network Configuration
SHOW NETWORK CONFIG
Syntax
SHOW NETWORK CONFIG
Description
Displays the current setting of the configuration parameters, including MAC and IP addresses, tftp host, password, etc.
SET IP ADDRESS
Syntax
SET IP ADDRESS <ip-addr> [<subnet-mask>]
Access-level : password
Description
Sets the IP address of the ethernet interface to <ip-addr> with a network mask <subnet-mask>, if supplied. Both <ip-addr> and <subnet-mask> are in the form of A.B.C.D.
By default, the IP address is 10.0.0.1, with a subnet mask of 255.255.255.0
SET IP GATEWAY
Syntax
SET IP GATEWAY <ip-addr>
Access-level : password
Description
Sets the IP address of the default gateway used to access addresses outside the local subnet.
The <ip-addr> parameter is in the form of A.B.C.D.
Changes made to this parameter will not take effect until the system is rebooted (see RELOAD).
SET TELNET TIMEOUT
Syntax
SET TELNET TIMEOUT <secs>
Description
Sets the inactivity timeout for TELNET sessions, in secs. <secs> can be in the range of 30 to
1800 (30 mins). The default timeout is 600 secs (10 mins).
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SET TFTPHOST
Syntax
SET TFTPHOST <ip-addr>
Description
Sets the IP address for a remote TFTP server, which is used by the COPY cmd.
PING
Syntax
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PING <ip-addr>
Description
Sends ICMP ECHO packets to <ip-addr>, and reports the results. The packets are 32 bytes in length.
COPY source destination
Syntax
COPY TFTP:<url-filename> {FLASH: | BOOTFLASH:}
COPY {FLASH: | BOOTFLASH:} TFTP:<url-filename>
Description
Copies remote file identified by <url-filename> via TFTP to/from application flash: or sysloader bootflash: memory. The first argument is the source, the second is the destination. It allows the user to download an image from the network and save in flash, or upload an image from flash to the network server. By default, the transfer uses the host IP address specified by SET TFTPHOST.
However, if the <url-filename> contains an address, the transfer will use this address instead. For example, 'copy tftp://10.0.0.10/file.bin flash:' would attempt to download the file from the specified address of 10.0.0.10, ignoring the current TFTPHOST setting, if any.
RELOAD
Syntax
RELOAD
Description
Reboots the system, performing the boot-up sequence as if from power-up.
5-5. Hardware Configuration
CONFIG commands are typically used during system mfg and set up, and should not normally be changed by the user, unless instructed to do so. These commands require system-level access.
CONFIG ATTN <maxdb> <stepdb>
Sets the attenuator max setting and stepsize, in dB
CONFIG FREQ <minf> <maxf>
Sets the min and max freq range, in MHz
CONFIG LOSS <minl> <maxl>
Sets the insertion loss min and max (at min/max freq), in dB
SAVE CONFIG
SHOW CONFIG
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5-6. Data Storage
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The MRS has a new logical storage device referred to as the dataflash: ( or DF: ). While the dataflash: cannot be used to directly store the simulation data tables, the dataflash: can be loaded with a text script file that can be used for a variety of purposes. The script file can contain any sequence of commands that are recognized from the CLI, and can be executed on command much like a batch file. The dataflash: script file is loaded via downloading the file from a network TFTP server connection. Once copied, the file is stored in non-volatile memory on the controller and is automatically saved for future execution. The script file can then be executed via a CLI command. While the script file can contain any sequence, it is particularly useful for setting up the simulation data tables.
While the data tables can be loaded via cli commands, it can take a long time to send the sequence via the serial port or even a network telnet connection, especially for a large number of data points. Also, without the dataflash:, the data points are lost upon power-down. The dataflash: fixes these issues.
To use the dataflash:, you must create an ASCII text file that has the desired sequence of commands. The lines of the file should be limited to 128 characters in length, and terminated with an ASCII CR (0x0D) , LF (0x0A) or both. The file can contain empty (blank) lines for readability, and can also contain comments lines. Comment lines are those lines that begin with either a single slash character (0x2F) , a double slash, or a single quote (0x27) character.
Examples are shown below:
/ THI S I S A COMMENT set data 1 12.45 13.45 13.45
/ / also a comment set data 2 1.2 2.2 3.2
' YET ANOTHER COMMENT
There are no formal limits on the number of lines contained in a script file, but the file size must be limited to a maximum of 512K bytes to fit into the dataflash: storage area ( a typical 10,000 point data script file is roughly 324K in size). An example 10-point data file might look like:
/ / setup general simulation params
/ / turn off calculations (sets table mode) set data calc off
/ / number of points set data points 10
/ / update rate of 1ms per point set data timer 0.001
/ / init the offset attn (# 4)
set offset attn 10.5
/ / fill table with 0dB fill data 0
/ / data points set data 0 0.25 0.5 0.75 set data 1 1.25 2.25 3.25 set data 2 2.5 4.5 6.5 set data 3 3.75 6.75 9.75 set data 4 5 9 13 set data 5 6.25 11.25 16.25 set data 6 7.5 13.5 19.5 set data 7 8.75 15.75 22.75 set data 8 10 18 26 set data 9 11.25 20.25 29.25 set data 10 12.5 22.5 32.5
/ / comment end of file
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Once the file has been created, the next step is to transfer it to the MRS. This is done via the network using the TFTP file transfer protocol. Place the file on a PC running a TFTP server that the MRS can communicate with. If you do not have a TFTP server, there are several freeware/open source packages available on the internet, such as tftpd32 (available at http://tftpd32.jounin.net/ ). The MRS contains a TFTP client that can be used to initiate the transfer from the CLI. Use the COPY command to perform the download to the MRS’s dataflash: device. For example, if the tftp server is at address 10.100.103.100, and the file is named “example.txt” you could use the command: mrs> copy tftp:/ / 10.100.103.100/ example.txt df:
This should initiate the transfer, download, and store the file into the dataflash: device. Note: as shown above, the target name for the file in the dataflash: is optional. Since the dataflash: can only hold a single file, the name is used for information purposes only. The name, if provided, will be displayed via the
Once succesfully transferred, the script file can be executed from the command line via the EXECUTE
SCRIPT command, which will parse and execute the series of commands from the file, after which a short summary is displayed. If you would like to see the script as it executes, you can use EXECUTE SCRIPT ECHO, which is useful for finding errors in the script. You can display the contents of the dataflash: to the console using the command SHOW
FILE DF: Once executed, the data table will contain the desired attenuation profile, and the simulation can be controlled via the normal RUN, STOP, etc commands.
Using the dataflash: to store the script is most useful for large data sets. After all, since the script file consists puely of executable commands, you could just send the contents of the script file via telnet for direct execution by the
MRS, and this works fine for small data sets. It can be, in fact, faster to do this than to use COPY TFTP: and
EXECUTE SCRIPT. Once the data set becomes larger, it’s more efficient to transfer the file to the dataflash:. Some typical times vs file sizes are shown below
Data points
100
500
1000
5000
Telnet transfer
2.2 sec
9.1 sec
17.8 sec
88.2 sec
Tftp transfer/execute
4 sec / 0.4 sec = 4.4 sec
4.9 sec / 1.7 sec = 6.6 sec
5.9 sec / 3.3 sec = 9.2 sec
14.5 sec / 16.3 sec = 30.8 sec
10000 176.3 sec 26.4 sec / 32.5 sec = 58.9 sec
Also, once the file has been stored in the dataflash:, it can be used again the next time the unit is powered up simply by using the EXECUTE SCRIPT command, saving the time required to re-download the file.
You can also retreive the contents of the dataflash: storage. The following command would create a file named “example.txt” on the TFTP server, and copy the contents of the dataflash: to it. mrs> copy df: tftp:/ / 10.100.103.100/ example.txt
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6. MAINTENANCE:
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The following paragraphs provide general inspection and maintenance guide lines for the Model 8314 WLAN
Simulator Subsystem.
6-1. INSPECTION: Perform a visual inspection in conjunction with the maintenance activities schedule when a malfunction is suspected, or whenever an assembly is removed or replaced.
6-2. PREVENTIVE MAINTENANCE: While the 8314 requires very little preventive maintenance, it should not be subjected to physical abuse, severe mechanical shock, high humidity, or operating temperatures outside the specification range. The instrument should be kept free of excessive dirt and dust, since these can interfere with connector functions and with normal heat dissipation. For cleaning instructions refer to paragraph 6-3 (special cleaning instructions). The following paragraphs provide the preventive maintenance that is to be performed on the
Unit.
Care should be taken to prevent strain on the interconnecting cables, since damage here may not always be apparent. Occasionally check the external cables and connectors for signs of cracked insulation and/or bent or worn pins. Tests show that connectors must be clean for accuracy and stability. This requires an inspection and cleaning of each connector immediately before use. For connector cleaning instructions, refer to paragraph 6-3. When cleaning precautions are observed regularly, connectors can maintain their stability for over several thousand connection cycles. Refer to Appendix A for more information about cables and connectors.
6-3. SPECIAL CLEANING INSTRUCTIONS: The cleaning procedures for 8314 are divided into five general groups: microwave coaxial cable assemblies, circuit card and modules; machined surfaces and hardware, chassis cleaning, and connector cleaning.
6-3.1. MICROWAVE COAXIAL CABLE ASSEMBLIES: Appendix A (located at the end of this manual) provides all the necessary procedures for care, cleaning, and handling of microwave coaxial cable assemblies.
6-3.2 CIRCUIT CARDS AND MODULES: A protective coating is applied to circuit cards for protection from moisture, arcing, short-circuiting, and abrasion. To remove light dirt from circuit cards and modules proceed as follows:
CAUTION
•
DO NOT use a nylon bristle brush in the solvent as the bristles may dissolve and cause damage to the circuit card or component.
•
DO NOT use ultrasonic cleaning on parts or assemblies containing electrical or electronic components.
•
DO NOT bend pins of electrical connectors when using fiber-bristle brush. a. Briskly brush isopropyl alcohol onto area to be cleaned with fiber-bristle brush. b. Carefully remove residue with a clean lint-free cloth and repeat step "a" as a rinse.
WARNING
Compressed air used for cleaning and/or drying can create airborne particles that may enter the eye. Goggles/ faceshields should be worn. DO NOT direct air stream towards self or other personnel. Pressure should be restricted to a maximum 15 psi to avoid personal injury. c. When parts are thoroughly clean, dry parts using 5 psi of clean moisture free compressed air or preferably dry nitrogen (pressurized spray will work well).
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6-3.3 MACHINED SURFACES AND HARDWARE: To remove light dirt and dust from mechanical parts such as castings, covers and other hardware proceed as follows:
WARNING
Compressed air used for cleaning and/or drying can create airborne particles that may enter the eye. Goggles/ faceshields should be worn. DO NOT direct air stream towards self or other personnel. Pressure should be restricted to a maximum 15 psi to avoid personal injury.
CAUTION
•
Under no circumstances use a wire brush, steel wool, or abrasive compound. Using these items will cause extensive damage to the instrument's surface.
•
DO NOT use a nylon bristle brush in solvent as the bristles may dissolve and cause damage to the circuit card or component. a. Use 5 psi of clean, moisture-free compressed air or preferably dry nitrogen to blow loose dirt and dust from surface of item. b. Briskly brush isopropyl alcohol onto area to be cleaned with a fiber-bristle brush. c. Remove residue with lint-free cloth and repeat step "b" as a rinse. d. When parts are thoroughly clean, dry parts using 5 psi of clean, moisture-free compressed air or preferably dry nitrogen. e. Clean smaller mechanical parts or hardware by dipping into a container of isopropyl alcohol. Remove dirt by brushing with fiber-bristle brush after parts have been immersed for several hours. f. Remove parts from isopropyl alcohol and rinse by immersing into a different container of isopropyl alcohol. g. When parts are thoroughly cleaned, dry parts using 5 psi of clean, moisture-free compressed air or preferably dry nitrogen.
6-3.4 CHASSIS CLEANING: Clean chassis using a lint-free cloth moistened with water and mild detergent. For harder to clean areas, such as inside corners of chassis, use a vacuum cleaner.
6-3.5 CONNECTOR CLEANING: Where small amounts of rust, corrosion, and/or oxide deposits are present on connectors, clean externally with a soft-bristle brush, aluminum wool, or internally with an acid brush; then wash with a non-corrosive solvent. MIL-C-83112 is recommended. Exercise care to ensure no metal filing or residue remains inside the connector and the connector is thoroughly dry. Where rust, corrosion, and/or oxide deposits are present in large quantities, replace the connector.
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6-4. LINE VOLTAGE FUSE REPLACEMENT: The following steps provide procedures to replace the line voltage
Fuse Assembly. This unit accepts a F1.5A, 250 Vac fuse for 115 Vac.
WARNING
Sufficient power levels are present at the Power Input Assembly to cause personal injury.
Ensure that the instrument power cord is DISCONNECTED before attempting to change fuses.
CAUTION
DO NOT connect or apply power to this instrument until the Power Entry Module
Assembly has been adjusted to the operational line voltage. a. Disconnect the power cord from the Power Entry Module Assembly. b. Use a small screwdriver to carefully open the Fuse Drawer. c. Slide out Fuse Drawer located in the center of the Power Entry Module Assembly. d. Remove defective fuse and replace with the correct fuse (Refer to applicable parts list for fuse part number). e. Snap the Fuse Drawer shut and re-connect ac power cord.
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7. REPLACEABLE PARTS LIST:
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This section lists and describes the parts located in the Model 8314 WLAN Simulator Subsystem (P/N 193-
8132-X). The Replaceable Parts Lists (RPL) are intended for use in identifying, locating, and requisitioning assemblies and components for the Model 8314.
7-1 UNDERSTANDING REFERENCE DESIGNATORS: All assemblies and electrical parts are identified by standard reference designators (resistors R1, for example). Reference designators are used in parts lists and on parts identification drawings. The title of a parts list or drawing contains the reference designator or the assembly or subassembly to which it applies. The designators in the parts list, as a prefix, but omitted from the list to make it easier to locate a specific part. To complete a reference designator in a parts list, precede the designator for the specific part (DS1, for example) with the designator in the title (A6, for example) to form a complete reference designator for the part (in this case, A6DS1).
7-2 ORDERING INFORMATION: When ordering parts from Aeroflex / Weinschel, please include the following information:
•
Aeroflex / Weinschel part number.
•
Description of the component or part.
•
Model and serial number of the instrument.
•
Assembly number and assembly revision (if any) from the assembly
(this information is on the component side of the PCB).
7-3 DRAWING NUMBER: The Aeroflex / Weinschel part number consists of a basic number with a dash number. The basic number should cross reference to a drawing number for most of the items. For those items that do not have a drawing number, the manufacturers part number is provided.
7-4 REPLACEABLE PARTS LIST (RPL): This RPL contains a breakdown of the instrument into its major assemblies and detailed parts. The following paragraphs describe the contents of each column of the RPL.
7-4.1 REFERENCE DESIGNATOR: This column contains reference designations arranged in alphanumerical sequence. The letters A thru Z have precedence, followed by numerals 0 thru 9. In addition to the reference designators that are listed, some mechanical parts are also listed. These items lack reference designators and are included because they are considered subject to wear and/or breakage, or because they are custom (non-standard) hardware or parts that might become lost or damaged. This column contains the word N/A for those items or parts not having a reference designator.
7-4.2 DESCRIPTION: This column contains the nomenclature located in the title block of the engineering drawing by the designing activity. The noun name is listed first, followed by modifiers and descriptive information to completely identify the part or assembly.
7-4.3 PART NUMBER: This column contains the Weinschel part number assigned to an assembly, sub-assembly, or detailed part. This also includes Weinschel numbers for specification control, source control, and altered items drawings.
7-4.4 VENDOR PART NO.: This column contains manufacturers part numbers for those parts Weinschel purchases, as off the shelf items and assigns Weinschel part numbers for internal control only. These parts may be ordered through the manufacturer or through Weinschel by the Weinschel part number.
7-4.5 CAGE CODE: This column provides the Commercial and Government Entity (CAGE) code on the same line as the applicable part number. Codes, names, and addresses of venders with an assigned CAGE are listed in Cataloging
Handbook H4-1 and H4-2. Vendors that have not been assigned CAGE codes by the government are identified by the word NONE in this column. The names and addresses of these venders can be obtained from Weinschel. Part numbers that have no CAGE numbers listed are manufactured or altered by Weinschel.
7-4.6 ASSEMBLY AND COMPONENT LOCATION: The assembly/component location and schematic diagrams for the 8314 series models are located in rear of this manual by the drawing number. Drawing find numbers have also been included to help locate components or hardware.
Aeroflex / Weinschel 31
27
28
29
32
33
34
35
36
37
22
25
26
1
2
3
8
9
5
7
10
12
13
14
15
17
18
20
21
068-32-6/0
068-32-8/0
193-9159
193-9193
193-9704-1
193-9704-2
193-9704-3
193-9704-4
068-51
193-9701-3
193-9700
193-9702
074-912
193-9710-000
193-9711
193-8097-000
193-9305-000
001-508
001-683-16
3T-3
3T-8
051-40
052-1-1/2
052-1-1
063-165-1
063-279
068-32-5/0
068-32-4/0
Model 8314-X
Model 8314-1, WLAN Simulator Subsystem Assembly Replaceable Parts List (P/N 193-8132-1):
Find
No.
Part Number Description Quantity Reference
Used Designator
CAGE
Code
38
39
074-170-5
074-3-30
40
51
53
54
56
57
58
59
062-184-5
079-147-10
079-147-9
MS35649-244
MS51957-19
MS51957-31
MS24693-C4
MS24693-C10
Aeroflex / Weinschel
ENCLOSURE, MODIFIED
CHASSIS
MOUNTING PLATE, ATTENUATOR
KIT, RACK MOUNTING W/O HANDLES 3.5 H
ASSY, PCB, CONTROLLER/ETHERNET
ASSY, POWER SUPPLY
ASSY, PCB, ATTEN DRIVER
ASSY, PCB,LED STATUS
ATTEN PRGM PIN 60 dB, 2-6 GHz, 8 BIT
PWR DIV / COMBINER, 3-WAY 2-4 GHz SMA-F
ATTEN FXD
ATTEN FXD
FUSE HOLDER, POW ER INPUT, W/SWITCH
FUSE 1/2 AMP
FUSE 1 AMP 250V
ADAPTER, TYPE N FEMALE TO SMA MALE
BULKHEAD DC TO 6GHz
CONNECTOR, BNC, FEMALE BULKHEAD
WITH GND TAB
COAXIAL CABLE ASSY, SMA M/M,
CONFORMABLE, DC TO 18 GHz
COAXIAL CABLE ASSY, SMA M/M,
CONFORMABLE, DC TO 18 GHz
COAXIAL CABLE ASSY, SMA M/M,
CONFORMABLE, DC TO 18 GHz
COAXIAL CABLE ASSY, SMA M/M,
CONFORMABLE, DC TO 18 GHz
ASSY, CABLE, GND
ASSY, CABLE, CONTROLLER TO FRONT
PANEL DISPLAY
ASSY, CABLE, RIBBON, 15 PIN FEMALE
TO FEMALE
ASSY, CABLE, RIBBON, 15 PIN FEMALE
TO FEMALE
ASSY, CABLE, RIBBON, 15 PIN FEMALE
TO FEMALE
ASSY, CABLE, RIBBON, 15 PIN FEMALE
TO FEMALE
CORD PWR 3-CONDUCTOR
DTCH 6.7FT 10A-125V
NEMA5-15P/IEC320-C13
CABLE TIE, #4-40 TIE DOWN
GROMMET, NYLON, FOR SHT THK .085 - .128
CATAPILLAR TYPE
CONN SCREW LOCK FEMALE
WIRE #22 BLACK TEFLON
WIRE #22 WHITE TEFLON
NUT HEX #4
SCR PAN HD 4-40 X 3/4 LG
SCR PAN HD 6-32 X 5/8 LG
SCR FLAT HD 4-40 X 3/8 LG 100
SCR FLAT HD 4-40 X 1 LG 100
4
6
9
2
8
2
1
1
1
1
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
24803
56
22424
16428
56501
6915
71468
0
0
1
1
1
1
1
1
1
1
1
2
1
1
1
4
1
1
1
1
1
1
1
4
1
1
2
3
1
4
NA
NA
W6
W5
W1
W2
W3
W4
NA
NA
W7
W8
NA
NA
NA
NA
A1
A2
A3
A4
AT1 - AT4
A5
AT5, AT9
AT6 - AT8
XF1
F1
F1
NA
IM-477
Vendor
Part Number
K2RMX-001A
A6P-48N-4MD
803-2-3.000
5245
75915
75915
64671
1VY65
93459
PSOSXSS6B
312-500
312001
5207-067
CP-1094-AST
B068-32-5/0
B068-32-4/0
B068-32-6/0
B068-32-8/0
17506
TY-33M
MGS-3-01
D20418-2
A079-147-10
A079-147-9
32
Model 8314-X
Model 8314-1, WLAN Simulator Subsystem Assembly Replaceable Parts List (P/N 193-8132-1):
Find
No.
Part Number Description Quantity Reference CAGE
Used Designator Code
70
71
75
76
66
67
68
69
60
61
62
63
64
65
78
79
80
81
MS51957-15
MS15795-803
MS35338-135
MS35338-136
NAS1635-04LR-8
074-889-8
090-354
090-445
090-353
090-301
090-482
090-285
079-128-1
COML-55
193-8133
IM477
089-4037
ATP856
SCR PAN HD 4-40 X 3/8 LG
WASHER FLAT .125 ID, .250 OD
WASHER LOCK #4
WASHER LOCK #6
SCR, PAN HD #4-40 X 1/2 LG, SELF LOCK
LABEL, TAMPER RESIST WHT POLYESTER,
.65 X .20
* LABEL WARNING HIGH VOLTAGE
* LABEL, REFERENCE INSTR MANUAL
* LABEL GROUND
* LABEL STD, 1.5 X .75 IN
LABEL, POWER INPUT, 115/230V
* NAMEPLATE HIGH VOLTAGE
TUBING HEAT SHRINKABLE 1/8 DIA
LOCTITE 242, (BLUE) REMOVABLE
THREADLOCK MEDIUM STRENGTH
WIRING DIAGRAM, WLAN SIMULATOR
MODEL 8314-1
O & S MANUAL, WLAN SIMULATOR
MODEL 8314-1,-2
ICD, WLAN SIMULATOR, MODEL 8314-1
ACCEPTANCE TEST PROC
WLAN SIMULATOR, MODEL 8314-1,-2
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
1
1
1
1
1
1
0.25
0.001
18
20
20
4
1
1
0
1
0
0
Vendor
Part Number
BRADY THT-14-423-10
6090
IM-477
RT-510-1/8
Refer to Aeroflex / Weinschel Drawing 193-8132-1 for parts location.
Aeroflex / Weinschel 33
28
29
32
33
34
35
36
37
22
26
27
7
8
9
17
18
20
21
10
12
13
14
1
2
3
5
068-32-8/0
193-9159
193-9193
193-9704-1
193-9704-2
193-9704-3
193-9704-4
068-51
193-9701-4
193-9700
193-9702
074-912
193-9710-000
193-9711
193-8097-000
193-9305-000
001-508
001-509
3T-3
051-40
052-1-1/2
052-1-1
063-165-1
063-279
068-32-4/0
068-32-6/0
Model 8314-X
Model 8314-2, WLAN Simulator Subsystem Assembly Replaceable Parts List (P/N 193-8132-2):
Find
No.
Part Number Description Quantity Reference
Used Designator
CAGE
Code
38
39
074-170-5
074-3-30
58
59
56
57
58
59
51
53
54
56
57
079-147-10
079-147-9
MS35649-244
MS51957-19
MS51957-31
MS24693-C4
MS24693-C10
MS51957-19
MS51957-31
MS24693-C4
MS24693-C10
Aeroflex / Weinschel
ENCLOSURE, MODIFIED
CHASSIS
MOUNTING PLATE, ATTENUATOR
KIT, RACK MOUNTING
W/O HANDLES 3.5 H
ASSY, PCB, CONTROLLER/ETHERNET
ASSY, POWER SUPPLY
ASSY, PCB, ATTEN DRIVER
ASSY, PCB,LED STATUS
ATTEN PRGM PIN 60 dB, 2-6 GHz, 8 BIT
COMBINER/DIVIDER 3-WAY, 2-6GHz, SMA/F
ATTEN FXD
FUSE HOLDER, POW ER INPUT, W/SWITCH
FUSE 1/2 AMP
FUSE 1 AMP 250V
ADAPTER, TYPE N FEMALE TO SMA MALE
BULKHEAD DC TO 6GHz
CONNECTOR, BNC, FEMALE BULKHEAD
WITH GND TAB
COAXIAL CABLE ASSY, SMA M/M,
CONFORMABLE, DC TO 18 GHz
COAXIAL CABLE ASSY, SMA M/M,
CONFORMABLE, DC TO 18 GHz
COAXIAL CABLE ASSY, SMA M/M,
CONFORMABLE, DC TO 18 GHz
ASSY, CABLE, GND
ASSY, CABLE, CONTROLLER TO FRONT
PANEL DISPLAY
ASSY, CABLE, RIBBON, 15 PIN FEMALE
TO FEMALE
ASSY, CABLE, RIBBON, 15 PIN FEMALE
TO FEMALE
ASSY, CABLE, RIBBON, 15 PIN FEMALE
TO FEMALE
ASSY, CABLE, RIBBON, 15 PIN FEMALE
TO FEMALE
CORD PWR 3-CONDUCTOR
DTCH 6.7FT 10A-125V
NEMA5-15P/IEC320-C13
CABLE TIE, #4-40 TIE DOWN
GROMMET, NYLON, FOR SHT THK
.085 - .128, CATAPILLAR TYPE
WIRE #22 BLACK TEFLON
WIRE #22 WHITE TEFLON
NUT HEX #4
SCR PAN HD 4-40 X 3/4 LG
SCR PAN HD 6-32 X 5/8 LG
SCR FLAT HD 4-40 X 3/8 LG 100
SCR FLAT HD 4-40 X 1 LG 100
SCR PAN HD 4-40 X 3/4 LG
SCR PAN HD 6-32 X 5/8 LG
SCR FLAT HD 4-40 X 3/8 LG 100
SCR FLAT HD 4-40 X 1 LG 100
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
2
4
6
8
6
8
9
2
1
1
4
1
1
24803
16428
56501
6915
0
0
1
1
1
1
1
1
1
1
2
2
1
1
4
1
1
1
5
1
4
1
1
1
1
1
4
1
NA
W6
W5
W1
W2
W3
W4
NA
NA
NA
NA
NA
NA
NA
NA
A1
A2
A3
A4
AT1 - AT4
A5
AT5 - AT9
XF1
F1
F1
NA
IM-477
Vendor
Part Number
K2RMX-001A
56
0HR85
5245
75915
75915
64671
1VY65
A6P-48N-4MD
PS3-12-451/1S
PSOSXSS6B
312-500
312001
5207-067
CP-1094-AST
B068-32-4/0
B068-32-6/0
B068-32-8/0
17506
TY-33M
MGS-3-01
A079-147-10
A079-147-9
34
70
71
75
76
66
67
68
69
60
61
62
63
64
65
78
79
80
81
Model 8314-X
Model 8314-2, WLAN Simulator Subsystem Assembly Replaceable Parts List (P/N 193-8132-2):
Find
No.
Part Number Description Quantity Reference CAGE
Used Designator Code
MS51957-15
MS15795-803
MS35338-135
MS35338-136
NAS1635-04LR-8
074-889-8
090-354
090-445
090-353
090-301
090-482
090-285
079-128-1
COML-55
193-8134
IM477
089-4038
ATP856
SCR PAN HD 4-40 X 3/8 LG
WASHER FLAT .125 ID, .250 OD
WASHER LOCK #4
WASHER LOCK #6
SCR, PAN HD #4-40 X 1/2 LG, SELF LOCK
LABEL, TAMPER RESIST WHT POLYESTER
.65 X .20
* LABEL WARNING, HIGH VOLTAGE
* LABEL, REFERENCE INSTR MANUAL
* LABEL GROUND
* LABEL STD 1.5 X .75 IN
LABEL, POWER INPUT, 115/230V
* NAMEPLATE HIGH VOLTAGE
TUBING HEAT SHRINKABLE 1/8 DIA
LOCTITE 242, (BLUE) REMOVABLE
THREADLOCK MEDIUM STRENGTH
WIRING DIAGRAM WLAN SIMULATOR
MODEL 8314-2
O & S MANUAL, WLAN SIMULATOR
MODEL 8314-1,-2
ICD, W LAN SIMULATOR MODEL 8314-2
ACCEPTANCE TEST PROC
WLAN SIMULATOR, MODEL 8314-1,-2
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
1
1
1
1
1
1
0.25
0.001
18
20
20
4
1
1
0
1
0
0
6090
Vendor
Part Number
RT-510-1/8
IM-477
BRADY THT-14-423-10
Refer to Aeroflex / Weinschel Drawing 193-8132-2 for parts location.
Aeroflex / Weinschel 35
Model 8314-X IM-477
9. CONTACTING AEROFLEX / WEINSCHEL:
In the event of a malfunction, contact Aeroflex / Weinschel, Inc. An apparent malfunction of an instrument or component may be diagnosed over the phone by first contacting the Customer Service Department at Aeroflex /
Weinschel, Inc. DO NOT send the instrument or component back to the factory without prior authorization. When it is necessary to return an item, state the symptoms, catalog and type number of the instrument or component, and date of original purchase. Also write the Company name and your name and phone number on a card and tape the card to the item returned. Page provides further information regarding preparation of a unit for reshipment. Contact Aeroflex /
Weinschel Customer Service Department as follows:
Via mail: Aeroflex / Weinschel, Inc.
5305 Spectrum Drive
Frederick, MD 21703-7362
U.S.A.
Via Telefax: 301-846-9116
Via Phone: Call TOLL FREE 800-638-2048
Toll call # 301-846-9222
Via Website: www.aeroflex-weinschel.com
Via e-mail: weinschel-[email protected]
10. AEROFLEX / WEINSCHEL WARRANTY:
PRODUCTS – Aeroflex / Weinschel warrants each product it manufactures to be free from defects in material and workmanship under normal use and service anywhere in the world. Aeroflex / Weinschel’s only obligation under this
Warranty is to repair or replace, at its plant, any product or part thereof that is returned with transportation charges prepaid to Aeroflex / Weinschel by the original purchaser within ONE YEAR from the date of shipment.
The foregoing Warranty does not apply Aeroflex / Weinschel’s sole opinion to products that have been subject to improper or inadequate maintenance, unauthorized modifications, misuse, or operation outside the environmental specifications for the product.
SOFTWARE PRODUCTS- Aeroflex / Weinschel software products are supplied without representation or Warranty of any kind. Aeroflex / Weinschel, therefore, assumes no responsibility and will not accept liability (consequential or otherwise) arising from the use of program materials, disk, or tape.
The Warranty period is controlled by the Warranty document furnished with each product and begins on the date of shipment. All Warranty returns must be authorized by Aeroflex / Weinschel prior to their return.
Aeroflex / Weinschel’s Quality System Certified to:
© 2008 Aeroflex / Weinschel, Inc.
Aeroflex / Weinschel 36
APPENDIX A
APPENDIX A
CARE AND HANDLING OF MICROWAVE COAXIAL
CABLE ASSEMBLIES
A-1 CARE AND HANDLING OF ASSEMBLIES.
To en su re accur ate measu remen ts an d op timal performance of Weinschel products, the microwave coaxial cable assemblies used in system and test setups must be properly used and maintained. Proper connections, routine inspection of all cables, and cleaning of the connectors are extremely important procedures which can prolong the longevity and accuracy of equipment.
A-2 CABLE INSPECTION.
Routinely check external cables for signs of cracked insulation, dents, twists, flattening, signs of jacket abrasion, or other signs of abuse. Wrinkles in the jacket indicate that the minimum bend radius has been exceeded. Most often, this occurs near the marker tubes and connectors.
Also inspect the connector interfaces for the following:
• Bent pins (male).
• Bent or missing tines (female).
• Worn or chipped plating.
• Damaged or displaced dielectric inserts.
• Thread damage.
• Folded or mushroomed outer interface rims.
• Mushroomed pin shoulders (male) or tine ends
(female).
• Score lines on pins and outer interface rims visible to the unaided eye.
• Recessed or protruding pins.
It is advisable to clean the connectors prior to inspection to make subtle damage more apparent. If any of the above is noted, replace the assembly before its further use results in equipment damage. Also inspect the mating connectors for similar damage.
Inspect the connector interface for signs of debris. Debris may be in the form of:
• Plating chips or other metal particles.
• Dust or dirt.
• Oily films.
• Other miscellaneous foreign particles.
If signs of debris are present, clean the connector interface as directed in Paragraph A-6.
A-3 MAKING INITIAL CONNECTIONS.
Exercise caution when mating cables. Poor connections lead to poor system performance. They can also damage not only the cable assembly, but more significantly, front or rear panel connectors on the equipment itself which may be more difficult to repair.
A-3.1
ALIGNING CONNECTORS.
Align the center lines of two connectors before actual mating. Male retaining nuts contain a small amount of necessary play which may make it possible to mate the threads without the pins being properly aligned. Pin misalignment can damage pins and dielectric inserts.
A-3.2
MATING CONNECTORS.
Gen t ly mate th e connectors by hand, taking care not to force the coupling nut at the slightest resistance. It is often possible to feel whether or not the pins are mated. If the coupling nut is difficult to turn, either the pins are not mated, the coupling nut is cross-threaded, or one of the connectors has been damaged by excess torque.
Never hold a male connector coupling nut stationary while screwing a female connector into it. This rotation can erode the plating and damage both the outer interface rim as well as the pin. If the pins become locked, serious damage can result to both the equipment and the cable assembly.
A-4 ENSURING PROPER CONNECTOR TORQUE.
A-4.1
OVERTORQUING.
Once connectors have been properly mated, apply only the proper amount of torque.
Overtorquing damages both connectors involved. Also, a connector which has been damaged by overtorquing, in turn, damages every connector to which it is subsequently mated.
It usually leads to poor system performance as well.
Overtorque can cause:
• Bent pins.
• Recessed or protruding pins.
• Recessed or protruding dielectrics.
• Chipped plating.
• Damaged coupling threads.
• Coupling nut retaining ring damage.
• Mushroomed outer interface shells.
• Mushroomed pin shoulders.
A-i
CARE & HANDLING OF COAXIAL CABLES
A-4.2
HEX-NUT TYPES.
snaps. Tightening too quickly can cause the wrench to exceed its set limit. Do not snap the wrench more than once as this also causes overtorque.
A-4.3
KNURLED NUTS.
T ig h ten co nn ector s with knurled nuts by hand. If this does not provide sufficient tightness use a hex-nut connector and torque wrench instead.
Never use pliers to tighten a connector. Table A-1 recommends torque specifications for the various types of connectors.
To mate a connector of the hex-nut type, always use a torque wrench set to the correct torque value. Tighten the connector slowly until the wrench
Table A-1. Recommended Torque Values
Connector
GPC-7 (7mm) w/hex nut
Type N w/hex nut
SMA, 2.92mm, 3.5mm
2.4mm, WPM, WPM-3
WPM-4
Type N & TNC (knurled)
BNC (knurled)
Recommended
Torque
14 in/lbs ± 1 in/lbs
14 in/lbs ± 1 in/lbs
7.5 in/lbs ± 0.5 in/lbs
Hand-tight
Hand-tight
A-5 PROPER CABLE HANDLING.
Never exceed the minimum bend radius specified for a cable. Guard against tight bends at the end of connector strain relief tubing, or at the ends of marker tubing where they may be less noticeable. Although cable bend may seem slight, the actual radius of the bend at the point of angular departure may be far smaller than the acceptable radius.
Never pinch, crush or drop objects on cable assemblies.
Also, do not drag a cable over sharp edges as this will pinch it and cause it to exceed the minimum bend radius.
Never use a cable assembly to pull a piece of equipment.
Cables and connectors are not designed to support or move equipment.
A-5.1
SECURING CABLES.
Use toothed, rubber-lined
"P-clamps" to hold cables in place. If it is necessary to use tie-wraps, use the widest possible wrap and the lowest setting on the gun to ensure the minimum pressure on the cable.
A-5.2
STORING CABLES.
W he n st or ing cab les, minimize cable "set" by coiling them in large diameters (1 or
2 feet). Unroll the cable properly when it is ready to be used; do not pull the loops out hastily. Similarly, re-roll them when storing them away again.
A-6 CLEANING CONNECTOR INTERFACES.
Use the following guidelines in cleaning connector interfaces: a. Do not use chlorinated solvents including common tap water. These solvents are extremely penetrating and sometimes ruin otherwise good devices and assemblies.
b. Moisten a cotton swab with isopropyl alcohol. Roll the swab on a paper towel to remove excess. c. Use the moistened cotton swab to wipe away debris.
Do not try to dissolve the debris by overwetting the swab.
d. Repeat the cleaning process using additional swabs as necessary. If metallic particles are embedded in the dielectric, use an eyeglass and a sharp pick in an attempt to dislodge them. Swab again. e. When satisfied that the interfaces are clean, blow them dry with dry compressed air, or preferably dry nitrogen
(pressurized spray cans work well). Do not use breath. f. Clean the mating connectors. These may be the source of the debris.
A-ii
Advertisement
Key Features
- Simulates connectivity between mobile and 3 base stations
- Individually controlled attenuators (0-63.75 dB in 0.25 dB steps)
- Supports raw data mode for arbitrary attenuation profiles
- Digital control of attenuators
- Supports both RS-232 serial port and 10BaseT Ethernet operation
- Provides TELNET access and TFTP client
- Maximum simulation distance: 20km
- Maximum mobile velocity: 320km/hr