Normally, the FIFO test described in the Command: “t” section is the best FIFO test to use. The “d” and “f” commands are included in case a “lower level” test is needed.
16.12Command: “f”
This command is used to see what data is currently stored in the Littlebear on- board FIFOs. LBTEST will prompt for how many bytes to read. This value can be from 0 to 200000 decimal.
LBTEST will read data from the FIFOs beginning at the next address to be read. The first 40 bytes the are read will be displayed on the screen. All of the bytes that are read will be stored in the file called “DMA.TST”. Note that LBTEST will display that a register is being written during this command. This register needs to be written with a certain value so that data can be clocked out of the FIFO. LBTEST does this automatically and there is no need to write any registers manually.
Normally, the FIFO test described in the Command: “t” section is the best FIFO test to use. The “d” and “f” commands are included in case a “lower level” test is needed.
16.13Command: “t”
This command is used to perform four “high level” tests.
The “p” (Print) test will instruct the copier to print out a 16” X 16” checkerboard test pattern. Everything is done automatically by LBTEST to complete this test print. The progress of the print will be displayed as the print proceeds. LBTEST will print up to 200 copies of this test pattern. Data for the test pattern will be downloaded to the copier for each of the copies.
The “s” (Scan) test will instruct the copier to scan in a plot. This plot can be any size; however, LBTEST will only read 18” of length data. The data from the scan is stored in two files. The first file, “TEST.FIL”, is 1 bit/pixel data. The second file, “TEST2.FIL”, is translated from “TEST.FIL” into 8 bits/pixel data. “TEST2.FIL” is optional, and will only be created after LBTEST prompts if this file is to be created (and the user enters ‘Y’). These files are not compressed, so they may be very large. “TEST2.FIL” may be as large as 100 MB. These files may be viewed using an image viewer.
The “b” (test Button) test will perform the exact test that the test button on the Littlebear controller card performs. After entering this command, LBTEST will return immediately to the main screen.
If the print engine is not captured after 90 seconds, the test pattern will not be printed, and the controller will resume its normal operation. If the engine is captured, a test pattern will be printed.
The pattern that is printed is not the same as the pattern that is printed using the “p” test described above. The test button pattern is 8.5” wide, centered, and has a 1” margin on the bottom of the plot. This pattern is generated entirely by the controller hardware, and looks like several rows of small spikes.
Print Server Manual | 65 | A741 |