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Qualifier Supplement

11

An enhancement to the integrity (ingress) test system is the function of the receiver
activating the transmitter only when measurements need to be made. Thereby reducing
vehicle power drain, transmitter heating, and general RF pollution. Additionally, the
activation signal from the receiver is encoded and the transmitter recognizes the encoded
activation signal. In this manner, false transmitter activation is eliminated. A multitude of
activation codes is available allowing multiple test systems to be in operation in the same
vicinity. Only the transmitter associated with a given receiver code activates when needed.

In practice the transmitter and activate antennas can be combined into one dual band antenna
with a diplex filter at the transmitter/receiver.

A further enhancement is the coding of the transmitter signal. In this manner, the receiver
can reject measurements not recognized as those from the test transmitter.

Other enhancements include: measurement data storage within the receiver for later retrieval
and analysis, integration with GPS system for location and time data, integration with a
cable modem or wireless device for data transfer to a central CATV location or internet
access.

Inside Cables

Drop Cable

Ground Block

Local Tap

Receiver

Service Vehicle

Transmitter

Transmitter Antenna

Activate Antenna

Activate

Signal

Содержание CyberTek Qualifier

Страница 1: ...CSI Document 101xxx 001 Rev A U US SE ER R G GU UI ID DE E SUPPLEMENT TO WINDOWLITE INSTALLER...

Страница 2: ...Return Information Products returned for repair calibration etc must be safely packed Please enclose information on the reason for return Ship the material prepaid All material in this manual is the...

Страница 3: ...upplement Table of Contents Specifications Supplemental Notice System Overview Component Operation Transmitter Receiver Hardware Installation Theory of Operation Transmitter Block Diagram Receiver Blo...

Страница 4: ...or 27 490 MHz Size TBD Weight TBD Storage Temperature 20 F 150 F Operating Temperature 0 F 120 F Humidity 5 95 non condensing Receiver Frequency 27 450 27 470 or 27 490 MHz Size 7 7 x 3 5 x 2 3 Weigh...

Страница 5: ...mises with a signal of about 58 dBmV assumes the service vehicle is about 75 feet from the premises Shielding flaws within the in home wiring invite the TST signal to infiltrate the upstream path Once...

Страница 6: ...in Qualifier Mode This allows the Qualifier unit to command the transmitter when to send its carrier Elements of the transmitter device are Receiver User Identifier RUID Rotary Switch The RUID Rotary...

Страница 7: ...ng this key when in Qualifier Mode enables the Command Link to a qualifying transmitter The device will command the transmitter to send a burst of carriers in order to make a measurement If the Qualif...

Страница 8: ...ake the unit back into the Main Qualifier Mode F4 Key RUID Pressing this key will allow the user to set the Receiver User Identifier RUID The current setting will be displayed The user can then use th...

Страница 9: ...mmanded by the handheld device Receiver section receives commands from handheld device Turn transmitter on off Select transmitter output power Power Transmitter Wiring Harness for Receiver Transmitter...

Страница 10: ...down the side of the residence to a device called a ground block The ground block is a pass through device connected to an earth ground It is used to prevent static build up between the cable system a...

Страница 11: ...the effects from devices that radiate electrical energy in the 5 to 50 MHz frequency range The upstream path uses digital signals and as such is subject to very unreliable operation if interference si...

Страница 12: ...e to ingress from devices within the residence then it will also have ingress from a known signal source The known signal source is a mobile transmitter operating on a frequency in the 5 to 50 MHz ran...

Страница 13: ...elding integrity of the cabling within the residence is acceptable Test signal level measurements may be indicated by the receiver in common units of measurement such as V or dBmV The receiver may aut...

Страница 14: ...evel of the received test signal is compared to a reference standard to determine if the shielding integrity of the drop cable is acceptable Test signal level measurements may be indicated by the rece...

Страница 15: ...ssociated with a given receiver code activates when needed In practice the transmitter and activate antennas can be combined into one dual band antenna with a diplex filter at the transmitter receiver...

Страница 16: ...tivation decoder determines a code match between the received signal and setting of the transmitter If a code match occurs the decoder activates the transmitter enable switch Otherwise the transmitter...

Страница 17: ...ies the coding If the coding matches the vehicle transmitter powers on and radiates the residence with the test signal The input tuner section receives the test signal resulting from ingress into the...

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