Townshend Computer Tools DAT-Link - Testing the Infrared Remote Control

42 Installation
As can be seen above, this test also provides some extra information about the
DAT-Link . The second line above, shows the amount of free memory available in
the DAT-Link for buering audio data. At 48,000 samples per second, stereo, 2
bytes per sample, the indicated memory would allow up to 5 seconds of buering.
See Sections 5 and 6 for information on how this buering is used.
The Peak transfer speed indicates the sp eed at which data is transferred between
the computer and the DAT-Link . The maximum audio data rate is approximately
200 kbytes/second, so as long as the transfer speed is signicantly greater than 400
kbytes/second
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, there should b e no problem with the SCSI bus keeping up with
the data transfers.
The last three lines showa test of the DAT-Link 's DSP32C processor. This also
indicates the amount of fast static RAM available to the DSP along with the memory
addresses. In the example, the standard conguration of the DAT-Link +isshown,
with 64 kbytes of memory b eginning at address 0, and an additional 2 kbytes at
the top of the memory space. The original DAT-Link should show memory from
address 0x000000 to 0x001fff , totalling 8 kbytes.
2.7.2 Testing the Infrared Remote Control
The DAT-Link includes a trainable, infrared remote control that can be used to
control any equipment that has a remote control of its own. The remote sensor
on the front of the DAT-Link is used to train the remote control. Once trained,
the separate remote transmitter box can be positioned near the equipment to be
controlled allowing full computer control of the device.
The test program for the infrared remote system works by generating remote con-
trol sequences from the remote transmitter and monitoring them using the remote
sensor. The host computer can then verify that b oth the transmitter and sensor
are working properly.
To test the remote control subsystem:
1. Connect the remote control transmitter boxby plugging it in to the remote
connector on the rear of the DAT-Link .
2. Aim the transmitter so the clear LED (light-emitting dio de) on the end of
the transmitter boxispointed toward the remote sensor on the front of the
DAT-Link . The transmitter should be p ositioned approximately 20 cm ( 8
inches ) from the DAT-Link .
3. Run the program:
rctrain -l
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Two transfers are required; from the DAT-Link to the computer and from the computer to
the hard disk