LightSpeed Technologies CAT 860 User Manual download pdf (Page 14)

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1. Overview 2. Setup & Use

3. Optional

Accessories

4. Troubleshooting

5. Warranty, Safety

& Speciﬁcations

1. Overview 2. Setup & Use

3. Optional

Accessories

4. Troubleshooting

5. Warranty, Safety

& Speciﬁcations

10. OUTPUT TO PERSONAL ASSISTIVE

LISTENING DEVICE (ALD)

1. Turn the ALD (Assistive Listening

Device) volume control on the

back panel all the way down (fully

counterclockwise).

2. Determine the size and type of

audio input jack on the device as

many manufacturers’ products

differ in connector size and shape.

The Lightspeed LES-370 Personal

FM System requires a 3.5 mm to

3.5 mm patch cable (part# CA-

MMC3535, not included).

3. Connect a patch cable from the

ALD’s microphone jack or AUX

input to one of the following

3.5mm audio jack on the CAT 860:

• “ALDOUT”onthefrontpanel

• “AUXOUT”onthebackpanel

4. Adjust the volume control on

the ALD’s receiver to maximum

output. NOTE! This is to set the

maximum allowable signal from

the CAT 860.

5. With the CAT 860 and ALD turned

on, speak into the REDMIKE and

slowly adjust the corresponding

volume control on the CAT 860

until the appropriate audio level is

obtained in the ALD.

RS-232 IN

Front Panel RS-232

Control Select

++--

RS-232 IN

Front Panel RS-232

Control Select

++--

9. AUDIO EQUALIZATION OF THE CAT 860

• Thevoiceshouldbenatural,

very clear and without any audio

feedback (ringing)

• Walktheroomlisteningforthe

overall quality and any feedback

that is present

• Ifthereisalotofaudiofeedback,

it is likely the volume is too high.

Ensure the volume is at the

appropriate level, a second person

is helpful to determine this.

• Iffeedbackisstillpresentwiththe

audio set at the right level, make

the following EQ adjustments:

– High pitched ring: lower the 2K

and/or 4K adjustment by _ turn

– Lower pitched ring: lower the

500 and/or 1K adjustment by _

turn

• Ifyounoticethesoundis“muddy”

or has too much bass:

– Lower the 500 adjustment by _

turn and/or

– Raise the 2K or 4K adjustment by

1/8 turn

• Note:theEQadjustmentsshould

be preset at “12:00.” This is the

nominal level and any adjustments

(up or down) should be made from

this level.

The CAT 860 uses a 4-band audio equalizer designed to optimize and ﬁne-tune

the microphone sound quality for the classroom. Below are some tips on proper

system equalization:

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LightSpeed Technologies CAT 860 User Manual Page 14

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