1. Automatic test equipment for testing a circuit having an oscillating crystal, the automatic test equipment comprising:
a generator for generating a first signal comprising an oscillating part having at least one predetermined frequency, a first terminal for coupling the first signal to the oscillating crystal, wherein the at least one predetermined frequency is located inside a predetermined window around one of the resonance frequencies of the oscillating crystal,
an analyzer, comprising a second terminal that is coupled to the oscillating crystal for detecting a second signal and a rectifier that is coupled in series with a low-pass filter for rectifying and filtering the second signal, and
a detector for detecting a DC-signal at the output of the low-pass filter and for signaling a valid test result for the oscillating crystal if the DC-signal exceeds a certain threshold value.
2. Automatic test equipment according to claim 1, wherein the low-pass filter is a half-wave rectifier comprising a diode working as a rectifier and a wherein the filter comprises a capacitor working as a low-pass filter.
3. Automatic test equipment according to claim 1, wherein the width of the window is a full width at half maximum of a resonance curve of the oscillating crystal at one of the resonance frequencies.
4. Automatic test equipment according to claim 1, wherein the predetermined frequency equals one of the resonance frequencies of the oscillating crystal.
5. Automatic test equipment according to claim 1, wherein the first signal comprises a plurality of predetermined frequencies corresponding to resonance frequencies of the oscillating crystal.
6. Automatic test equipment according to claim 1, wherein the oscillating crystal is coupled to the automatic test equipment using switches having a low capacitive load.
7. Method of operating an automatic test equipment for testing a circuit having an oscillating crystal, the automatic test equipment comprising: a generator, a first and a second terminal, a detector and an analyzer, the method comprising:
coupling the first and second terminal to different terminals of the oscillating crystal;
coupling a first signal that is generated by the generator via the first terminal to the oscillating crystal, wherein the first signal comprises an oscillating part having at least one predetermined frequency that is located inside a predetermined window around one of the resonance frequencies of the oscillating crystal;
detecting a second signal at the second terminal;
rectifying and low-pass filtering the second signal with the analyzer; and
detecting a DC-signal with the detector in the rectified and low-pass filtered signal and signaling a valid test result for the oscillating crystal if the DC-signal exceeds a certain threshold value.
8. The method according to claim 7, wherein filtering the second signal uses a half-wave rectifier comprising a diode working as a rectifier.
9. The method according to claim 8, further comprising using a capacitor as a low-pass filter.
10. The method according to claim 7, wherein the width of the window is a full width at half maximum of a resonance curve of the oscillating crystal at one of the resonance frequencies.
11. The method according to claim 7, wherein the predetermined frequency equals one of the resonance frequencies of the oscillating crystal.
12. The method according to claim 7, wherein the first signal comprises a plurality of predetermined frequencies corresponding to resonance frequencies of the oscillating crystal.
13. The method according to claim 7, wherein the oscillating crystal is coupled to the automatic test equipment using switches having a low capacitive load.
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 lockset drilling guide, comprising:
a frame defining an opening in said frame, said frame comprising a first flange and a second flange mounted perpendicularly thereto; and
a positioning member mounted on said frame, said positioning member movable from a first position to a second position with respect to said frame;
wherein said positioning member laterally displaces said frame when said positioning member is moved from said first position to said second position.
2. The lockset drilling guide of claim 1, wherein said opening is formed on said second flange.
3. The lockset drilling guide of claim 1, wherein said positioning member laterally displaces said opening along a plane defined by said second flange when said positioning member is moved from said first position to said second position.
4. A lockset drilling guide system for a door having a face and an edge that is perpendicular to said face comprising:
a frame comprising a first flange that lies adjacent to said face of said door and a second flange mounted perpendicularly thereto and lying adjacent to said edge of said door, said first flange defining an opening;
a positioning member fixed to said frame, said positioning member moving from a first position to a second position with respect to said frame;
wherein said positioning member laterally displaces said frame when said positioning member is moved from said first position to said second position.
5. The lockset drilling guide system of claim 4, wherein said positioning member laterally displaces said opening parallel to a plane defined by said second flange when said positioning member is moved from said first position to said second position.
6. The drilling guide system of claim 4, wherein said first flange does not contact said face of said door and said second flange contacts said edge of said door when said positioning member is at said first position.
7. The drilling guide system of claim 4, wherein said first flange contacts said face of said door and said second flange contacts said edge of said door when said positioning member is at said second position.
8. A lockset drilling guide comprising:
a frame defining an opening in said frame, said opening contained within a plane and said frame comprising a first flange and a second flange mounted perpendicularly thereto; and
a positioning member mounted on said first flange, said positioning member moving from a first position to a second position with respect to said frame;
wherein said positioning member laterally displaces said frame within said plane when said member is moved from said first position to said second position.
9. The lockset drilling guide of claim 8, wherein said opening is formed on said second flange.
10. A method of forming a hole in a first door for the placement of a lockset, said method comprising:
providing a door;
providing a lockset drilling guide comprising:
a frame defining an opening in said frame;
a positioning member that is mounted on said frame movable to either a first position or a second position;
determining a desired position on said door for forming a hole at said desired position;
based on said determined desired position, moving said positioning member to one of either the first position or the second position when said lockset drilling guide is mounted to said door at the desired position;
mounting said lockset drilling guide to said door so that said opening is aligned with said desired position; and
inserting a drilling tool within said opening and forming said hole by said drilling tool.
11. A lockset drilling guide kit, comprising:
a frame defining an opening in said frame, said frame comprising a first flange and a second flange mounted perpendicularly thereto;
a drill bit sized to be received in and guided by said opening; and
a positioning member mounted on said frame, said positioning member movable from a first position to a second position with respect to said frame;
wherein said positioning member laterally displaces said frame when said positioning member is moved from said first position to said second position.
12. A lockset drilling guide for a door having a door face and a door edge, comprising:
a frame comprising a first flange for positioning adjacent the door edge and a second flange mounted perpendicularly to the first flange, said second flange having a face for positioning adjacent the door face, said first flange defining a first opening and said second flange defining a second opening;
a positioning member movable from a first position where it is attached to said face and a second position where it is removed from said face;
wherein said positioning member laterally displaces said frame relative to the door edge when said positioning member is moved from said first position to said second position.
13. The lockset drilling guide of claim 12, wherein said positioning member consists of a spacing tab engageable with said surface when in said first position.
14. The lockset drilling guide of claim 12, wherein said first opening and said second opening are dimensioned to receive and guide drill bits.
15. The lockset drilling guide of claim 13, wherein said spacing tab is permanently attached to said frame.
16. The lockset drilling guide of claim 12, wherein said frame is secured to the door by fasteners engaging the door edge.
17. The lockset drilling guide of claim 12, wherein said first flange defines a mounting opening, said mounting opening used to secure the frame to the door.
18. The lockset drilling guide of claim 17, wherein the mounting opening is located on the first flange so as to align with an opening on latch plate that is part of the lockset.
19. A lockset drilling guide for a door having a first planar face and a second planar ace that is perpendicular to said first planar face, comprising:
a frame defining an opening in said frame, said frame comprising a first flange that lies adjacent to a parallel to said first face of said door and a second flange mounted perpendicularly thereto and lying adjacent to and parallel to said second face, said opening being on said second flange; and
a positioning member attached on said first flange by a flexible piece, said positioning member being movable from a first position located between the first flange and the first face of said door to a second position not between the first flange and first face of said door,
wherein said positioning member laterally displaces said opening on said second face when said positioning member is moved from said first position to said second position.