1. A tangible computer readable storage medium having instructions stored thereon that, when executed, cause a machine to:
transmit a first signal from a first point of a communication network to a second point of the communication network, wherein the first point of the communication network and the second point of the communication network are remotely located from one another;
record a first time at which the first signal is transmitted from the first point of the communication network to the second point of the communication network using a first clock, wherein an operation of the first clock is based on a first reference signal generated by a first oscillator located at the first point of the communication network;
obtain a first measurement of at least one performance characteristic associated with the first signal at the first point of the communication network;
associate the first measurement with the first time;
record a second time at which the first signal is received at the second point of the communication network, wherein the second time is recorded using a second clock, wherein an operation of the second clock is based on a second reference signal generated by a second oscillator located at the second point of the communication network, wherein the first reference signal and the second reference signal are substantially similar, and wherein each of the first and second oscillators has an original input reference having a drift that is less than 1.6\xd710\u22128 in one year;
obtain a second measurement of the performance characteristic of the first signal as received at the second point of the communication network;
associate the second measurement with the second time;
compare the first measurement and the second measurement of the performance characteristic as a function of the first and second times; and
determine at least one end-to-end performance characteristic of the communication network based on the comparison of the first and second measurements.
2. A tangible computer readable storage medium as defined in claim 1, wherein the first and second oscillators comprise Stratum-2 oscillators.
3. A tangible computer readable storage medium as defined in claim 1, wherein the end-to-end performance characteristic includes at least one of signal distortion, signal duplication, signal intensity, and signal-to-noise ratio.
4. A tangible computer readable storage medium as defined in claim 1, wherein the first point of the communication network is a customer premises equipment.
5. A tangible computer readable storage medium as defined in claim 1, wherein the second point of the communication network is a customer premises equipment.
6. A tangible computer readable storage medium as defined in claim 1, wherein the second point of the communication network is a device within a central office.
7. A machine accessible tangible computer readable storage medium as defined in claim 1, having instructions stored thereon that, when executed, cause the machine to receive a third signal indicating that the first clock has received the first reference signal and a fourth signal indicating that the second clock has received the second reference signal.
8. A tangible computer readable storage medium as defined in claim 7, having instructions stored thereon that, when executed, cause the machine to provide a third reference signal via a satellite to the first clock and the second clock.
9. A system for testing a communication network, comprising:
means for transmitting a first signal from a first point of the communication network to at least a second point of the communication network, wherein the first point of the communication network and the second point of the communication network are remotely located from one another;
means for recording a first time at which the first signal is transmitted from the first point of the communication network to the second point of the communication network using a first clock, wherein an operation of the first clock is based on a first reference signal generated by a first oscillator located at the first point of the communication network;
means for obtaining a first measurement of at least one performance characteristic associated with the first signal at the first point of the communication network;
means for associating the first measurement with the first time;
means for recording a second time at which the first signal is received at the second point of the communication network, wherein the second time is recorded using a second clock, wherein an operation of the second clock is based on a second reference signal generated by a second oscillator located at the second point of the communication network, wherein the first reference signal and the second reference signal are substantially similar, and where each of the first and second oscillators has an input reference having a drift that is less than 1.6\xd710\u22128 in one year;
means for obtaining a second measurement of the performance characteristic of the first signal as received at the second point of the communication network;
means for associating the second measurement with the second time;
means for comparing the first measurement and the second measurement of the performance characteristic as a function of the first and second times; and
means for determining at least one end-to-end performance characteristic of the communication network based on an output of the comparing means.
10. The system of claim 9, wherein the first and second oscillators comprise Stratum-2 oscillators.
11. The system of claim 9, wherein the end-to-end performance characteristic includes at least one of signal distortion, signal duplication, signal intensity, and signal-to-noise ratio.
12. The system of claim 9, wherein the first point of the communication network is a customer premises equipment.
13. The system of claim 9, wherein the second point of the communication network is a device within a central office.
14. A system for testing a communication network, comprising:
a signal generator to transmit a first signal from a first point of the communication network to a second point of the communication network, wherein the first and second points are remotely located from one another and the signal generator is to obtain a first measurement of at least one performance characteristic associated with the first signal;
a first clock to record a first time at which the first signal is transmitted from the first point of the communication network to the second point of the communication network, wherein the first clock is to associate the first measurement with the first time;
a first oscillator located at the first point of the communication network, wherein an operation of the first clock is based on a first reference signal generated by the first oscillator;
a signal receiver to receive the first signal at the second point of the communication network, wherein the signal receiver is to obtain a second measurement of the performance characteristic associated with the first signal;
a second clock to record a second time at which the first signal is received at the second point of the communication network, wherein the second clock is to associated the second measurement with the second time;
a second oscillator located at the second point of the communication network, wherein an operation of the second clock is based on a second reference signal generated by the second oscillator, wherein the first reference signal and the second reference signal are substantially similar, wherein each of the first and second oscillators has an input reference having a drift that is less than 1.6\xd710\u22128 in one year, and wherein the signal receiver is to compare the first measurement and the second measurement of the performance characteristic as a function of the first and second times and to determine at least one end-to-end performance characteristic of the communication network based on the comparing.
15. The system of claim 14, wherein the first and second oscillators comprise Stratum-2 oscillators.
16. The system of claim 14, wherein the end-to-end performance characteristic includes at least one of signal distortion, signal duplication, signal intensity, and signal-to-noise ratio.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A snowshoe defining opposite front and rear ends and opposite first and second sides and comprising:
an opened, rigid, U-shaped frame member having first and second elongated parallel side bars respectively located on said snowshoe first and second sides and integrally linked by an arcuate front frame tip portion, said frame member having a gap near said rear end of said snowshoe between said first and second side bars;
a decking that is at least semi-rigid, that extends within said U-shaped frame member and that is attached to said U-shaped frame member, said decking defining a toe hole and a rear edge; and
a harness pivotally attached to said decking;
wherein said rear edge of said decking is located at and forms said snowshoe rear end.
2. A snowshoe defining opposite front and rear ends and opposite first and second sides and comprising:
a rigid frame member;
a decking that is at least semi-rigid, that extends within said frame member and that is attached to said frame member, said decking defining opposite upper and lower surfaces and a transverse toe hole having a peripheral edge; and
a harness pivotally attached to said decking, said harness comprising a load-bearing toe plate extending partly over said decking upper surface and partly over said toe hole, an attachment member attached to said toe plate for releasably attaching said harness to a person’s foot resting on said toe plate, a flexible tongue attached to said decking lower surface and attached to said toe plate through said toe hole, and an anti-torsion shoulder located between said toe plate and said flexible tongue in said toe hole;
wherein said harness is pivotable between a first position in which said toe plate extends substantially parallel to said decking and said anti-torsion shoulder is positioned closely adjacent to said peripheral edge of said toe hole to abut against said peripheral edge of said toe hole if said harness is pivoted about an axis that is generally transversal to said decking; and a second position in which said toe plate is pivoted within said toe hole so as to transversely extend partly through said toe hole.
3. A snowshoe as defined in claim 2, wherein said attachment member extends underneath and is attached to said toe plate and defines attachment straps above said toe plate for attaching said harness to a person’s foot, with said harness further comprising a claw plate that is attached to said attachment member and that has a toothed portion extending within said toe hole of said decking.