What is claimed is:
1. A method of constructing a BGA-PGA-Flex probe comprising the steps of:
soldering a BGA socket onto a PGA header to form a BGA-PGA assembly;
testing the BGA-PGA assembly for continuity;
inserting a flex assembly onto the BGA-PGA assembly;
placing solder preforms over each PGA pin; and
using a localized heat source to reflow the flex assembly to the BGA-PGA assembly.
2. The method of claim 1 wherein the step of soldering a BGA socket onto a PGA header comprises using reflow.
3. The method of claim 1 wherein the step of inserting a flex assembly onto the BGA-PGA assembly is preceded by a step of assembling said flex assembly, said step comprising:
placing all SMT components onto a flexible circuit;
using a localized heat source to reflow said SMT components; and
testing said flex assembly for continuity.
4. The method of claim 3 wherein said localized heat source is a reflow oven.
5. The method of claim 3 wherein said localized heat source is a soldering pencil or a heat gun.
6. The method of claim 3 wherein said localized heat source is an IR source.
7. The method of claim 3 wherein said step of using a localized heat source to reflow the flex assembly to the BGA-PGA heats only one side of the assembly and minimizes migration of solder.
8. The method of claim 7 wherein said localized heat source heats said solder preforms to over 183 degrees Celcius.
9. The method of claim 8 wherein said temperature is in the range of 200 degrees Celcius to 250 degrees Celcius.
10. The method of claim 9 wherein said localized heat source is applied for approximately between 60 and 120 seconds.
11. The method of claim 7 wherein said localized heat source is a hot air source.
12. The method of claim 7 wherein said localized heat source is an IR heat source
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 wireless communication network comprising:
a transmitter for wirelessly transmitting symbols represented by bits;
a receiver for receiving the symbols; and
a feed forward data rate controller for generating a data rate control signal which controls data rate of a current transmission based on an estimate of bit error probability for the current transmission to improve performance of the network wherein the estimate of bit error probability is based on number of bit errors that have previously occurred during at least one transmission which occurred prior to the current transmission in the network and wherein the estimate is not based on the number of bit errors during the current transmission.
2. The network as claimed in claim 1 further comprising a feedback power controller for controlling transmit power in the network.
3. A method for controlling data rate of a wireless communications network wherein the receiver receives symbols represented by bits, the method comprising:
generating an estimate of bit error probability for a current transmission; and
generating a control signal which controls data rate of the current transmission based on the estimate of bit error probability to improve performance of the network wherein the estimate of bit error probability is based on number of error bits that have previously occurred during at least one transmission which occurred prior to the current transmission in the network and wherein the estimate is not based on the number of bit errors during the current transmission.
4. A controller for controlling data rate of a wireless communication network wherein the receiver receives symbols represented by bits, the controller comprising:
means for generating an estimate of bit error probability for a current transmission; and
feed forward data rate control means for generating a control signal which controls data rate of a current transmission based on the estimate of bit error probability to improve performance of the network wherein the estimate of bit probability is based on number of bit errors that have previously occurred during at least one transmission which occurred prior to the current transmission in the network and wherein the estimate is not based on the number of bit errors during the current transmission.
5. The controller as claimed in claim 4 further comprising a memory for storing the number of bit errors that have previously occurred during the at least one transmission.