What is claimed is:
1. An optical information storage medium having a plurality of grooves and a plurality of lands alternately formed, each of said grooves and each of said lands functioning as recording tracks to form an information storage region, said optical information storage medium comprising:
a first header region having a plurality of first phase pits respectively formed on extensions of said plurality of lands; and
a second header region having a plurality of second phase pits respectively formed on extensions of said plurality of grooves;
wherein each of said grooves has an optical depth of about 38 where is the wavelength of a light beam to be used;
each of said first phase pits has an optical depth smaller than that of each of said grooves;
each of said second phase pits has an optical depth substantially equal to that of each of said grooves; and
said first header region and said second header region are shifted from each other along the extension of each of said grooves.
2. An optical information storage medium according to claim 1, wherein the optical depth of each of said first phase pits is set so that the polarities of push-pull signals obtained by the light beam directed on said first and second phase pits and diffracted in a direction perpendicular to a direction of movement of said first and second phase pits are opposite to each other between said first and second phase pits, and that the polarity of a push-pull signal in said first header region is the same as the polarity of a push-pull signal generated by each land.
3. An optical information storage medium according to claim 2, wherein each of said first phase pits has an effective optical depth of 8.
4. An optical information storage medium having a plurality of grooves and a plurality of lands alternately formed, each of said grooves and each of said lands functioning as recording tracks to form an information storage region, said optical information storage medium comprising:
a first header region having a plurality of first phase pits respectively formed on extensions of said plurality of lands; and
a second header region having a plurality of second phase pits respectively formed on extensions of said plurality of grooves;
wherein said first header region and said second header region are shifted from each other along an extension of each of said grooves;
each of said grooves has an optical depth of (2n1) 8 where A is the wavelength of a light beam to be used and n is a positive integer;
each of said first phase pits has an optical depth of (2n14m) 8 where m is an integer not less than 0;
each of said second phase pits has an optical depth of (2n14s)8 where s is an integer not less than 0; and
said n, m; and s are related so as to satisfy conditions of 2n14m>0 and 2n14s>0.
5. An optical information storage medium according to claim 4, wherein the optical depth of each of said second phase pits is smaller than that of each of said grooves.
6. An optical information storage medium having a plurality of first grooves and a plurality of lands alternately formed, each of said first grooves and each of said lands functioning as recording tracks to form an information storage region, said optical information storage medium comprising:
a plurality of second grooves respectively formed on extensions of said first grooves so as to continue to said first grooves, each of said second grooves having a width smaller than that of each of said first grooves;
a groove header region having a plurality of first phase pits respectively formed so as to overlap said plurality of second grooves; and
a land header region having a plurality of second phase pits respectively formed on extensions of said plurality of lands so that each of said second phase pits is interposed between any adjacent ones of said second grooves;
wherein said groove header region and said land header region are shifted from each other along the extension of each first groove;
all of said first grooves, said second grooves, and said first phase pits have the same optical depth of about (2n1)8 where is the wavelength of a light beam to be used and n is a positive integer;
each of said second phase pits has an effective optical depth of about (2m1)4 where m is a positive integer; and
said n and m are related so as to satisfy a condition of (2m1)4<(2n1)8.
7. An optical information storage medium according to claim 6, wherein:
the optical depths of all of said first grooves, said second grooves, and said first phase pits are set to about 38; and
the optical depth of each of said second phase pits is set to about 4.
8. An optical information storage medium according to claim 6, further comprising a common sector mark region having a plurality of sector marks as third phase pits respectively corresponding to said plurality of first grooves, each of said third phase pits having an optical depth equal to that of each of said first grooves and a width substantially equal to that of each of said first grooves.
9. An optical information storage medium according to claim 8, wherein said sector marks have front edges and rear edges both aligned in a direction perpendicular to an extension of each of said first grooves.
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 method of calibrating a compensation element in a transmitter having an output, the method comprising:
configuring the transmitter to transmit in each of a plurality states;
for each of the plurality of states, setting a transmit power value to each of a plurality of transmit powers in a range of transmit powers supported by the transmitter;
for each of the plurality of states and each of the plurality of transmit powers:
while measuring a code channel power at a port of the transmitter output, adjusting digital gains of each activated code channel until desired values of total output power are measured at the output port;
when desired values of total output power are measured at the output port, saving the digital gains for use in mapping the digital gains to the desired values of total output powers.
2. The method of claim 1, wherein saving the digital gains comprises generating a look-up table for each of the plurality of states for mappings of total output powers to digital gains.
3. The method of claim 1, wherein saving the digital gains comprises generating a look-up table of mappings of total output powers to digital gains in which different columns of the look-up table comprise digital gains representing the digital gains for each of the plurality of states.
4. The method of claim 1 further comprising, prior to saving the digital gain values for use in mapping to the desired values of total output powers:
processing measured information to generate appropriate ranges of total output powers that map to a respective digital gain value.
5. The method of claim 1, wherein each state comprises a selection of a particular set of code channels from a set of possible code channels, and a selection of at least one of an encoding format, a signal format, and a data rate for at least one of the set of particular code channels.
6. The method of claim 1, wherein each state comprises at least one of:
a selection of a particular set of code channels from an available set;
a selection of a particular encoder format for at least one code channel;
a selection of a particular signal format for at least one code channel; and
a selection of a particular data rate for at least one code channel.
7. The method of claim 1, wherein the code channels are CDMA code channels.
8. The method of claim 1 used for calibrating a single transmitter.
9. The method of claim 1 used for calibrating a batch of transmitters that do not have significant unit to unit variation.
10. A method of calibrating a compensation element in a transmitter having an output, the method comprising:
configuring the transmitter to transmit in each of a plurality states;
for each of the plurality of states, setting a transmit power value to each of a plurality of transmit powers in a range of transmit powers supported by the transmitter;
for each of the plurality of states and each of the plurality of transmit powers:
while measuring code channel powers of each activated code channels at a port of the transmitter output:
determining a first digital gain for each activated code channel, representative of a nominal gain to produce a code channel power at a port of the transmitter output;
adjusting digital gains of each activated code channel until desired values of total output power are measured at the output port;
determining a difference between an adjusted digital gain resulting in the desired value of total output power and the first digital gain to obtain a differential digital gain for each activated code channel;
saving the differential digital gains, for use in mapping to the differential digital gains, in conjunction with a nominal gain, to desired values of total output powers.
11. The method of claim 10 wherein saving the differential digital gains comprises generating a look-up table for each of the plurality of states for mappings of total output powers to differential digital gains.
12. The method of claim 10 wherein saving the differential digital gains comprises generating a look-up table of mappings of total output powers to differential digital gains in which different columns of the look-up table comprise differential digital gains representing the differential digital gains for each of the plurality of states.
13. The method of claim 10, wherein the code channels are CDMA code channels.
14. The method of claim 10 used for calibrating a single transmitter.
15. The method of claim 10 used for calibrating a batch of transmitters that do not have significant unit to unit variation.
16. A computer-readable medium having computer readable instructions stored thereon for implementation by a computer processor for implementing a method comprising:
configuring the transmitter to transmit in each of a plurality states;
for each of the plurality of states, setting a transmit power value to each of a plurality of transmit powers in a range of transmit powers supported by the transmitter;
for each of the plurality of states and each of the plurality of transmit powers:
while measuring a code channel power at a port of the transmitter output, adjusting digital gains of each activated code channel until desired values of total output power are measured at the output port;
when desired values of total output power are measured at the output port, saving the digital gains for use in mapping the digital gains to the desired values of total output powers.
17. A computer-readable medium having computer readable instructions stored thereon for implementation by a computer processor for implementing a method comprising:
configuring the transmitter to transmit in each of a plurality states;
for each of the plurality of states, setting a transmit power value to each of a plurality of transmit powers in a range of transmit powers supported by the transmitter;
for each of the plurality of states and each of the plurality of transmit powers:
while measuring code channel powers of each activated code channels at a port of the transmitter output:
determining a first digital gain for each activated code channel, representative of a nominal gain to produce a code channel power at a port of the transmitter output;
adjusting digital gains of each activated code channel until desired values of total output power are measured at the output port;
determining a difference between an adjusted digital gain resulting in the desired value of total output power and the first digital gain to obtain a differential digital gain for each activated code channel;
saving the differential digital gains, for use in mapping to the differential digital gains, in conjunction with a nominal gain, to desired values of total output powers.