41
SYMPTOM:
The diagnostic program’s Transmit/Receive Test
fails.
SOLUTION:
Either you forgot to install the MIDI loopback
cable, or the ports you’ve physically looped-back have not been
properly specified in the diagnostic program. This test transmits
MIDI data out one port and then verifies that it can be properly
read into another.
SYMPTOM:
The diagnostic program’s SMPTE Analog I/O Test
fails.
SOLUTION:
You may have forgotten to connect the board’s
SMPTE In connector to the SMPTE Out connector using a 1/4”
phone cable. This test uses the cable to write SMPTE back into the
unit and verify that it can be properly read.
SYMPTOM:
The diagnostic program passes all tests except for
the “Receive Interrupt” test.
SOLUTION:
The IRQ setting in the diagnostic program probably
does not match the IRQ setting of your parallel port. Make sure
they are set to the same value. If this does not alleviate the prob-
lem then your port is probably using another IRQ than you think
it is, or you have another peripheral using the same IRQ (See the
Physical Installation and Running the DOS Diagnostics sections).
Important note: Some laptop computers with built-in sound-
cards may be using IRQ 7 (the usual default for LPT1). Consult
the computer documentation or talk to the computer manufac-
turer’s tech support department on how to change this setting of
the internal sound hardware.
SOLUTION:
You may be running the diagnostics under
Windows. Go ahead and quit Windows before running
P4X4DIAG.EXE. When Windows is running, even in the back-
ground, it steals the interrupt/IRQ from the PORTMAN 4x4/S
(even if you run P4X4DIAG.EXE from a DOS window or the DOS
Prompt). Try running the program from DOS it should now work.
If you are running Windows 95 make sure you have chosen
“Restart in MS-DOS Mode” in the shutdown box.
Содержание Portman 4x4
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