Hall Research M1-TM - Manual (Page 3)

• Plug the push-button switch cord to the CONTROL plug on the box.
• Connect the power adapter to the power terminal on the unit.
The two CHAIN outputs of Module can be connected to the Student units using the CVGX cables. If you will be
linking all of the student units on one daisy chain, then plug a terminator (Model TM-75) into the unused connector
of the box and terminate the last Student unit on the daisy chain with a TM-75 (i.e. the two CHAIN outputs are
eventually terminated).
Operation of the Teacher's Module:
With the push button light off (power on default mode), no video or audio distribution is taking place.
To take over all student monitors, press the push button switch once; the LED on the switch illuminates and the
image from the instructor's monitor is being displayed at full resolution and speed on all student monitors. At the
same time whatever sound is being produced at the instructor's station, is also broadcast to all student stations.
To release student monitors, press the button again. The light on the LED shall go out and the system becomes
transparent to the classroom.
To blank student monitors, press the push-button twice (double-click). the LED will blink to indicate that all
monitors are blanked at the moment. Of course, the sound distribution from the instructor's station is still active. To
come out of the blanking mode, press the button again.
Audio Distribution Concerns
If the instructor would like his own voice to be broadcast to all student stations at the same time as video
distribution, he/she can simply plug in a microphone into the instructor computer's Mic input (usually on the sound
card). In Windows operating system you can double click on the speaker icon to access individual slider volume
controls for all sound devices (may need to be activated first in the options menu).
When the sound is being broadcast from the teacher's station, the best signal to noise ratio (S/N) is accomplished
when the output sound level of the instructor's PC is at or near the max level. In this case the sound volume heard at
the teacher's own speakers can be reduced using the volume control on the speaker.
To adjust the sound level at the student stations so that they are about the same loudness, use the LINE INPUT slider
control of the individual PC's (prior to taking over the student monitors with the push-button), and set them at a level
less than half way up. You can then use an iterative procedure to adjust the line input levels of all student monitors to
any desired level.
(B) Student's Station
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