Tektron Micro Electronics SCORPION Used by Police For Surveillence User Manual Manual

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Document ID	302794
Application ID	55qfmchQrmu+B7EZ5FzvWw==
Document Description	Manual
Short Term Confidential	No
Permanent Confidential	No
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Document Type	User Manual
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Filesize	93.94kB (1174198 bits)
Date Submitted	2003-02-13 00:00:00
Date Available	2003-04-02 00:00:00
Creation Date	2003-02-11 11:07:00
Producing Software	Xerox Document Center 440
Document Lastmod	2003-02-11 11:20:03
Document Title	Manual

OPERATION, INSTALLATION
AND MAINTENANCE MANUAL
FOR THE
SCORPION
DIGITAL STEREO TRANSMITTER
DECEMBER 2002
TEKTRON MICRO ELECTRONICS, INC.
74838 Candlewood Road
Hanover, MD 21076 USA
(410) 850-4200 4! FAX (410) 850-4209
DISCLAIMER
The use of these products is subject to Federal, state and local criminal
and civil law.
THE PRODUCTS DESCRIBED HEREIN ARE ONLY AVAILABLE TO
FEDERAL, STATE AND LOCAL LAW ENFORCEMENT AGENCIES AND
OFFICERS FOR LEGITIMATE OFFICIAL USE,
It is the sole responsibility of any law enforcement agency interested in
acquiring these products, and not Tektron Micro Electronics, to consult
legal counsel with respect to the application of any Federal, state or local
laws or regulations to the use or possession of the products described
herein.
1.0
20
3.0
SCORPION TRANSMITTER OPERATING MANUAL
TABLE OF CONTENTS
INTRODUCTION
1.1 Scorpion Digital Stereo Transmitter
1 ,1.1 Scorpion Transmitter Summary of Features
1.2 Scorpion Transmitter Packing List
1.3 Scorpion Transmitter Connector Nomenclature
SCORPION TRANSMITTER SPECIFICATIONS
SCORPION TRANSMITTER OPERATION
3.1 Power
3 2 External Power lnput
3.3 Antenna
314 Microphones
wMNAA
(0010003
4,0
50
6,0
SCORPION TRANSMITTER OPERATING MANUAL
TABLE OF CONTENTS (Continued)
SCORPION TRANSMITTER THEORY OF OPERATION
4,1
4.2
43
4.3.1
432
4.3.3
Transmitter Block Diagram
Output RF Spectrum
Operational Security —
Low Probability of Detection
Radio Wave Propagation
Low Spectral Density Emission -
Hiding 3 Signal in Noise
Message Security
SCORPION TRANSMITTER MAINTENANCE
SCORPION TRANSMITTER WARRANTY INFORMATION
6.1
6.2
63
6,4
6.5
Warranty
Limitation of Warranty
Exclusions from Warranty
Exclusive Remedy
Limitatlon of Liability
It
10
13
16
16
17
19
20
21
21
21
21
22
23
DISCLAIMER
The use of these products is subject to Federal, state and local criminal
and civil law,
THE PRODUCTS DESCRIBED HEREIN ARE ONLY AVAILABLE TO
FEDERAL, STATE AND LOCAL LAW ENFORCEMENT AGENCIES
AND OFFICERS FOR LEGITIMATE OFFICIAL USE.
It is the sole responsibility of any law enforcement agency interested in
acquiring these products, and not Tektron Micro Electronics, to consult
legal counsel with respect to the application of any Federal, state or local
laws or regulations to the use or possession of the products described
herein,
1.0
1.1
INTRODUCTION
SCORPION DIGITAL STEREO TRANSMITTER
The Scorpion transmitter is a digital wireless stereo transmitter, which offers
extremely high quality audio response. It provides inputs for two electret
microphones, and uses a stereo analog-to—digital converter and a digital RF
operating at selected UHF frequencies Because the radio transmission is truly
digital in nature, a companion Tektron digital receiver delivers audio signals, which
are nearly indistinguishable from a hard-wire connection to the Scorpion transmitter
microphones.
The unique characteristics of this transmitter also contribute to simple and user
friendly operation. These include: dual channels of information transmitted from a
single antenna, two microphones cables and a power cable.
1.1.1
1.2
SCORPION TRANSMITTER SUMMARY OF FEATURES
, Two 16 bit channels, 50 Hz to 7900 Hz bandwidth
- 90 dB dynamic range with 0,01% distortion, exclusive of microphones
- Wide dynamic range obtained without AGC
- Forward Error Correction included
- External microphones on attached 18-inch cables
- Power cable
- Fully enclosed metal case
- 155 x 4 x 67 mm overall size
- SSMC antenna connector (6" long flexible antenna supplied)
— 10 mW output
1.0 ounces total weight
SCORPION TRANSMITTER PACKING LIST
1 each Digital Stereo Transmitter
1 each 1/4 Wave Antenna
1 each Operating Manual
2 each Microphone Cable Assembly
1 each Power/Control Cable
1.3
SCORPION TRANSMITTER CONNECTOR NOMENCLATURE
There is one jack on the Scorpion Digital Stereo Transmitter, which accepts an
industry standard plugt An SSMC male connector is used for the antenna The
AEP mating antenna connector is part no. 7002-1541-010.
AEP connectors are available from:
Applied Engineering Products
104 John W. Murphy Drive
New Haven, CT 06513
Telephone: 1-800-444-5366
2.0
SCORPION TRANSMITTER SPEClFICATIONS
All performance specifications are typical at +25 degrees C, unless otherwise noted.
Audio Channels
Microphones
Microphone Power
Analog S/N Ratio
Total Harmonic Distortion
Audio Frequency Response
Stereo Separation
Audio Gain
Digitization
Anti~Alias Filter
Sampling Rate
Sampling Accuracy
information Rate
Coding
Signaling Rate
2 (left/right stereo) or 1 (mono)
External electret
1.8 VDC @ 50 pA
86 dB (max. input to "A" weighted noise) “
0.01% (max input@ 1 kHz)*
50 Hz to 7900 Hz (-3dB)"
80 dB (40 Hz — 8 kHz)'
30 dB (microphone input to receiver output)
Exclusive of microphone, measured at Scorpion
digital receiver analog output.
16 bit Linear Sigma-Delta A/D Conversion
Linear Phase Digital Filter
0.01 dB Passband Ripple, 80 dB Stopband Atten.
16 KHz
+/- 50 ppm, 40 to +50 degrees C
512 KBit/second
Rate 1/2 Forward Error Correction
1.024 MBit/second
2.0 SCORPION TRANSMITTER SPECIFICATIONS (Continued)
Transmission Frequency
Frequency Stability
Harmonic Output
Modulation
RF Spectrum
RF Bandwidth
Power Output
Antenna Impedance
Antenna
Antenna Connector
External Power
Input Power
Operating Temperature Range
Storage Temperature Range
Size
Weight
Single Channel, selected UHF Frequencies
360 — 400 MHz
+/- 0,05%, -10 to +50 degrees C
More than 30 dB below fundamental
Minimum Shift Keying
Evenly distributed about channel center
1 MHz @ 10 dB below peak density
10 mW minimum into 50 ohm load @ 6 VDC
50 ohms (less than 5:1 VSWR)
Whip monopole
SSMC Jack (male)
3 to igVDC negative ground
23 mA @ 3 VDC (typical 70 mW throughout input voltage
range)
-20 to +60 degrees C
-40 to +80 degrees C
15.5x4x67mm
Less than 1 ounce
3.0
3.1
3.2
SCORPION TRANSMITTER OPERATION
POWER
Power is supplied externally through the POWER cable as shown in Figure 1,
IMPORTANT: The Scorpion transmitter uses latching power and microphone
cables. which can be removed, DO NOT PULL ON THE
CABLES To remove cables firmly depress connector latch
before withdrawing connector. When connecting the cables do
not use excessive force prior to full engagement. Do not attempt
to force the microphone connector into power receptacle since
the sockets may damage.
EXTERNAL POWER INPUT
A negative ground DC supply between 3 and 14 volts. Two AA size alkaline
batteries will operate the Scorpion transmitter for approximately 15 hours. Even
though the transmitter is provided with reverse voltage protection, exceeding the
maximum voltage limits or failure to observe voltage polarity can cause damage to
the transmitter.
Figure 1 DST-1 Wiring and Function Diagram
i mg a /
,A~——«
cars l )
3.2.1 EXTERNAL CHANNEL CONTROL, MODE CONTROL AND POWER
CONNECTION
An optional means to select the operating frequency and the stereo/mono mode is
by external rotary switches mounted on a printed circuit board a small distance away
from the center (8 pin) transmitter connector. This printed circuit board also
provides the means to easy attach power supply wires to the Scorpion transmitter.
Connectingflcme:
Each wire cable exiting the center eight pin connector contains 4 very small
individual wires. Normally, the power feed to the transmitter is via a power source
(usually batteries) with a positive wire and a negative wire. These wires will
probably be a much larger gauge than the #34 wires inside the Scorpion cable.
Splicing large diameter wires to very small wires can be difficult, therefore, an
attachment mechanism has been provided. A printed circuit board has been affixed
to the end of the wires exiting the eight pin connectort At the end of the board are
two solder pads that can be used to attach power supply wires.
Available on the same board are two rotary switches, one three position and one eight
position switch. These switches control stereo/mono selection (3 position) and
operating frequency (8 position).
7.a
StereoLMomSeJecttan
Stereo or Mono operation is selected by rotating the three (3) position switch
according to the selections shown below in the figure titled “Mode Switch Settings".
‘LMONO’ selects the left microphone ‘RMONO' selects the right microphone Be
sure to position the connector wires to the left when making adjustments.
MODE SWITCH SETTINGS
MODE SWITCH POSITiON
STEREO ®
LMONO @
RMONO ®
(WIRES TO LEFT)
Qhannelflequenqflfielectian
The transmitter opera ing frequency is selected by rotating the eight (8) position switch
according to the selections shown below in the figure entitled “CHANNEL SWITCH
SETTINGS". The channel numbers correspond to the individual frequencies preset
into the transmitter. Check the frequency sheet supplied with each Scorpion
transmitter. Be sure to position the connector wires to the left when making
adjustments.
CHANNEL SWITCH SETTINGS ’
‘ CHANNEL SWITCH POSITION
®®®®®®®®
(WIRES T0 LEFT)
7.b
3.3
ANTENNA
A properly designed antenna is important to realizing maximum power output and
range for the transmitter. The transmitter antenna connection is at the opposite end
of the transmitter housing from the power and MIC connections. The antenna
connection is completed by screwing on the antenna or cable connector to the
matching transmitter connector. Connections should be finger tight. do not use
wrenches or pliers to on the connector nut.
Custom antennas may be used with the Scorpion transmitter, The antenna
connector is a standard SSMC female jack. The Scorpion is designed fora 50-ohm
antenna load with VSWR less than 5:1. No damage will result from short or open
circuits on the antenna jack, but it should be realized that rated power will only be
delivered into a 50-ohm load.
Antenna orientation is not critical. however, several general principles should be
taken into account. When using the supplied whip antenna, standing the Scorpion
transmitter vertically gives an omni-directional radiation pattern. Orienting the
Scorpion transmitter horizontally will result in a “Figure-8" pattern. One situation to
avoid. it possible, is pointing the antenna directly toward the intended receiver site.
This results in a theoretical minimum amount of signal radiated toward the receiver.
In practical situations however, there will likely be enough reflections in the
environment to ensure communication with even this orientation.
For any given transmitter antenna placement. there will be some receiver antenna
orientations which will be more effective than others. When using the transmitter in
an operational setting it will be helpful to try a variety of different receiving antenna
placement and positions.
3.4
4.0
MICROPHONES
Two microphones, one for each stereo channel, or one microphone for single
channel must be externally connected to the transmitter cables, The transmitter is
designed to work with electret microphones and has been tested using the Knowles
eiectret microphones, F6 Series
THEORY OF OPERATION
Converting analog audio waveforms to digital data, that is, a sequence of rapid on-
off decisions has become almost commonplace in modern telephony, high fidelity,
and audio recording equipment. Recent advances in analog—to—digitai (AID) and
digital-to-analog (D/A) converters have made available inexpensive integrated
circuits, which allow miniaturization of all the essential functions, The primary
benefit of a digital format is that extremely accurate transmission, recording, and
reproduction becomes a reality. A secondary benefit is that the digital format lends
itself to coding and encryption in systems designed for private communications
This section describes some details ofthe Tektron Digital Transmitter and the nature
of its wideband, “low probability of intercept" signal.
4.1
TRANSMITTER BLOCK DIAGRAM
The figure shown above is a simplified block diagram of a typical Tektron Digital
Stereo Transmitter. it shows the three essential functions; an analog-to-digital (A/D)
converter; a fonNard-error-correction (FEC) and synchronization generator; and
lastly, an RF module consisting of the oscillator, modulator and power amplifier.
In stereo mode the left and right microphone signals are amplified and input to a
stereo analog-to—digital (A/D) converter. The A/D converter samples each of the
inputs at 16 kHz and generates two 16-bit binary “words" which represent the
instantaneous input voltages at the moment of sampling. Because the 16 kHz
sampling rate is very high the analog input signals do not change appreciably from
one sampling instant to the next. Thus, the stream of digital output words accurately
represents the input audio signals.
10
4.1
TRANSMITTER BLOCK DIAGRAM (Continued)
Engineering textbooks give a rigorous mathematical description of this process and
show that audio frequencies as high as 1/2 the sampling rate may be conveyed by
the sampling process without ambiguity. With 16 kHz sampling rate we may,
therefore, design for an audio frequency response of 8 kHz in fact, the A/D
converter is a large-scale integrated circuit used in high-quality Compact Disk and
digital audio applications. it employs an over-sampled “1-bit” conversion technique
and includes a sophisticated digital filter for each channel resulting in a 7.6 kHz
response at the 3 dB roll—off points,
Multiplying 16 kHz by 16 bits/sample by 2 channels yields the output digital date rate
of 512 Kbits per second (KB/s) This is applied to the digital coding and
synchronization section of the transmitter, which generates a 1.024 MB/s, coded
data output.
The 512 KB/s digital audio signal is converted to a 1,024 MB/s output via a rate 1/2
fonNard-error-correction (FEC) code. A rate 1/2 FEC means that the output data
stream has twice as many bits as the input data stream. FEC coding is a standard
technique used in digital systems to reduce the signal-to—noise (S/N) ratio required
at the receiver, Of course, more than a few errors per sample will overwhelm the
decoding algorithm but even so the final result is that the receiver requires a lower
S/N ratio with FEC coding than without
11
4.1 TRANSMITTER BLOCK DIAGRAM (Continued)
NOTE: It should be emphasized that FEC coding is not the same as data
encryption used for classified message traffic There is no message
“key” which can be changed to prevent unauthorized reception.
However, FEC coding does lend a measure of privacy in the Digital
Stereo Transmitter, in that an unauthorized receiver will have to
discover the particular algorithm used before recovery of good data is
possible. Furthermore, as described in more detail below, using both
A/D conversion and PEG coding makes it impossible for a narrow band
analog receiver to break-out the audio signal.
The final connection in the transmitter block diagram consists of the FEC coder
output link to the RF module, which generates the carrier frequency and amplifies it
to 10mW output power,
12
4.2
OUTPUT RF SPECTRUM
The Tektron Digital Stereo Transmitters emit a unique RF spectrum which is
fundamentally different from that of conventional audio transmitters. it has
wideband, low-probabiiity~of—detection characteristics which are identical to those in
costly spread-spectrum systems, This is a consequence of the inherently high data
transmission rate needed for CD quality audio combined with MSK (minimum‘shifi-
keying) modulation, which gives a uniform spectral density within the ratio channel,
The figure shown is a Spectrum Analyzer plot of the Scorpion transmitter RF output
which illustrates this point nicely with the analyzer set to 10KHz resolution
bandwidth.
v , . . ewe ,,,au __ t W, ,,.J-_,e._c, _
CENTER 352.52 MH: SPAN tzfez'tégz
RES aw ta kHz yew 12 kHz we as: MEG:
13
4.2
OUTPUT RF SPECTRUM (Continued)
(This bandwidth is typical of commercial audio receivers and scanners, which are
intended for narrowband AM and FM reception.) Two characteristics of the
Scorpion transmitter spectrum are immediately evident. First, it is a wideband signal
spread out over 1.12 MHZ. Second, the spectral density is about 0.25 milliwatts in a
10 kHz bandwidth.
This occurs even though the total transmitted power has not changed! it is still 10
mW. But now, due to the wideband modulation, the total power is spread over 100
"channels” of 10 kHz bandwidth each. The significance of this latter point is that a
20 dB reduction in the power measured at a scanner’s detector has been achieved,
and the likelihood of detection is correspondingly reduced. As compared with a
conventional analog audio transmitter. the Scorpion transmitter appears to be a
weak, noisy signal - albeit one occupying 100 adjacent 10 kHz channels!
14
4.2 OUTPUT RF SPECTRUM (Continued)
The following figure has the analyzer video bandwidth set to average the display
and give a more accurate reading
G5
__.__...,, . H . . . m
CENTER 362.521 MHz SPAN 11am MHz
R525 aw in kHz new 3.2! H: Sufi 75 fine
15
4.3
4.3.1
OPERATIONAL SECURITY - LOW PROBABILITY OF DETECTION
Operational security has become an ever increasing problem to law enforcement
investigations as commercial scanners and walkie-talkies grow more and more
common As a wideband, smooth-spectrum transmitter, the Tektron Digital Stereo
Transmitter provides a significant contribution to two important security
requirements, freedom to operate without detection, and privacy of message
content.
This section addresses the relationship between radio wave propagation, low
spectral density and their effect on operational security.
RADIO WAVE PROPAGATION
Any radio transmission creates an electromagnetic (E/M) field emanating from the
antenna. This field can be likened to a series of expanding circles of energy,
growing in diameter as they leave the point of origin.
As the distance between a radio transmitter and receiver increases, the received
field strength decreases geometrically in proportion to the distance covered. In free
space the field diminishes as the square of the distance. Thus, when the distance
between transmitter and receiver is doubled the field strength will reduce to ‘/« (2
squared) of its previous value,
Signal propagation over ground is even more severely attenuated. At the VHF and
UHF frequencies (30 - 1500 MHz), a common estimate is that attenuation varies as
the fourth power of distance. In that case, doubling the distance between
transmitter and receiver will reduce the signal to 1/16 (2 x 2 x 2 x 2) of what it had
been.
16
4.3.1
4.3.2
RADIO WAVE PROPAGATION (Continued)
The significance of these calculations is that there is a very large difference in field
strength between the near vicinity of the transmitter and a point at the farthest
distance at which a signal can be received. Low probability of detection comes into
play, for any transmitter, when the detection device is a sufficient distance away
from the transmitter to be affected by this drastic drop in signal strength. It is also
true that it is very difficult to make a signal “absolutely undetectable" when close to a
transmitter. In fact, if a sensitive laboratory grade spectrum analyzer is used, ANY
practical signal can be detected within 50 feet of the transmitter.
LOW SPECTRAL DENSITY EMISSION - HIDING A SIGNAL IN NOISE
When any radio receiver attempts to pick up signals, it must do so in competition
with the random background noise, which is present in its environment, as well as
the random noise generated within the receiving apparatus itself. Since the 19405 it
has been recognized that spreading a signal’s bandwidth beyond the required
minimum will reduce its probability of detection by unauthorized receivers. The
reason lies in the property of random noise energy being smoothly distributed
across the spectrum. The amount of noise power a receiver picks up is directly
proportional to the bandwidth employed. If the desired signal is made noise-like and
spread to the point where its spectral density — its received Watts per Hertz of
bandwidth- is below the random noise background, it literally will be undetectable!
Of course, all this assumes the intended receiver can “do-spread” the signal and
restore the proper signal/noise ratio before demodulating it in the normal fashion.
17
4.3.2 LOW SPECTRAL DENSITY EMISSION - HIDING A SIGNAL IN NOISE (Cont)
Contemporary spread-spectrum transmitters generally achieve a 10 to 20 spreading
factor (called “processing gain” in the engineering literature) which means that the
signal received in a scanner or narrow-band receiver is reduced by the same factor.
For example, a spread—spectrum signal will register only 1/10 or 1/20 the energy of
a comparable AM or narrowband FM transmission This is an important
improvement but must be evaluated in light of the 10 billion to one ratio of signal
strengths experienced between the immediate vicinity of the transmitter and the
furthest practical receiving range.
A scanner will typically stop on a signal if there is enough energy centered around
the frequency it is inspecting. if the signal is spread out across a wide range in the
spectrum, the detection device will ‘see' less energy than it needs to cross its alarm
threshold and it will not register the presence of an RF transmitter.
An important fact when considering bandwidth is that it is the size of the band that is
critical, not how the band was created. A transmitter of any design that produces a
wideband signal was created. A transmitter of any design that produces a wideband
signal will effectively hide from a scanner or narrow band receiver. Thus, a spread
spectrum transmitter with a bandwidth of 1.5 MHz is no more effective at avoiding
detection than any other design (of equal power) with a 15 MHz bandwidth.
Thus, if two transmitters of the same radio frequency output power are located the
same distance from a scanner or narrow band receiver, the transmitter with the
widest bandwidth will be the least llkely to be detected, whether it is a “spread
spectrum" transmitter or not.
18
4.3.3 MESSAGE SECURITY
Tektron’s digital modulation also preserves message security since the transmitted
signal is a binary code representation of the audio received at the microphone. The
Tektron system also adds parity bits to the binary code according to an error
correction algorithm, This combination eliminates transmission intelligibility for any
receiver not designed to match the Tektron transmission parameters,
The combination of these characteristics mean there is no observable correlation
between audio events, such as sudden loud noise or loud single frequency tones
when a spectrum analyzer is used as a detection device, Neither is there any form
of recognizable audio available to a detection receiver employed as an intercept
devise,
19
5.0 MAINTENANCE
The Scorpion transmitter is designed to afford maximum user adaptation to
operational requirements, User maintenance is limited to proper installation of
power and attachment of the microphones. Because of special tools and processes
required, there are no user repairable items inside the transmitter.
The Scorpion transmitter does, however, employ modular design and construction
and it is possible that a damaged unit may be repaired economically at the factory. if
a unit is damaged, it may be sent for an estimate of repair costs to:
Tektron Micro Electronics, inc.
74838 Candlewood Road
Hanover, MD USA 21076—3102
Telephone: 410-850-4200
FAX: 410-850-4209
Please call for an RMA (Returned Merchandise Authorization) before sending,
Tektron will provide specific shipping instructions at the time an RMA is issued
20
6.0
6.1
6.2
6.3
WARRANTY INFORMATION
WARRANTY
Tektron Micro Electronics ("the Manufacturer") warrants to the first purchaser that
this equipment will be free of defects in materials and workmanship for a period of
one (1) year from the date of shipment to a purchaser,
LIMITATION OF WARRANTY
This warranty does not cover repairs or replacements required as a result of misuse,
mishandling, improper storage, extreme weather or other Acts of God, failure to
perform maintenance, alterations or repairs made other than in accordance with the
Manufacturer's directions or other use inconsistent with the Manufacturer's
instructions. Use in accordance with the Manufacturer‘s instructions is the
responsibility of the user. This warranty is available only to the first purchaser of the
equipment, but the exclusions and limitations herein apply to all persons and
entities,
This warranty does not apply to consumable items included in the equipment, such
as batteries,
EXCLUSIONS FROM WARRANTY
Manufacturer MAKES NO OTHER WARRANTY, EXPRESS OR IMPLIED‘ AND
SPECIFICALLY MAKES NO WARRANTY OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR USE.
21
6.4
EXCLUSIVE REMEDY
The Manufacturer will, at its option, repair or replace any equipment or parts not
conforming to this warranty at its facility or other location approved by it at no charge
to the user. The Manufacturer will not charge the customer for any parts or
equipment furnished or services provided by or at the direction of the Manufacturer,
except that customers will be responsible for all costs of shipping to the
Manufacturer any item required to be returned to the Manufacturer. The equipment
or part repaired or replaced by the Manufacturer's agent will be returned at the
Manufacturer's cost.
To obtain warranty service, contact the Manufacturer at the address or phone
number listed below to determine if return of any item is required,
Tektron Micro Electronics, Inc
7483A Candlewood Road
Hanover, MD 21076 USA
(410) 850-4200 FAX (410) 850—4209
At the time authorization is requested, the Purchaser will be asked to identify the
product serial number, a description of the problem(s) and associated symptoms,
their designated point of contact and telephone number, and the shipping address
for return of the repaired product. To minimize delays, please be sure to provide
adequate information.
Do not return the defective parts or equipment to the Manufacturer without prior
authorization from the Manufacturer.
22
6.5
LIMITATION OF LIABILITY
Except for the remedy above described, the Manufacturer will have no (a) other
obligation with regard to any breach of warranty or other claim with respect to the
equipment; (b) liability for any direct, indirect‘ consequential or incidental loss or
damage caused by or occurring in connection with any of the equipment; (c) liability
for any injury, loss of life or property caused by or occurring in connection with the
use of any of the equipment.
Any warranty or other claim with respect to the equipment must be made in writing
delivered to the Manufacturer within one year and 30 days after date of receipt of
the equipment by the first purchaser and include evidence of the date of receipt and
source of purchase, Any claim not received by the Manufacturer within such shall
be deemed waived.
23
WARRANTY CARD
Please complete (print) the following information.
Name of Buyer
Address
City State lip Code
Country—Telephone Number
Model No. Serial No,
Model Description
Date Purchased
Tektron Distributor or Agent from which purchased
After completing‘ please detach and send to the following address:
Tektron Micro Electronics inc.
7483A Candlewood Road
Hanover, MD 21076 USA
24

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