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Panel Descriptions

Front Panel

POWER Indicator

LOCK Switch

Auto Control Buttons

Function Setting Switches

AUTO Indicator

PEAK Indicator

Auto Control Buttons ([START] [SET] [CLEAR])

Pressing the [START] button initiates Auto Adjust.

Pressing the [SET] button ends the Auto Adjust process,
and fixes the anti-feedback filter settings.

Holding down the [CLEAR] button for approximately
two seconds completely clears the anti-feedback
filters.

For more information about Auto Adjust function,
please refer to “About Auto Adjust” on page 10.

LOCK Switch

With the lock function set to “ON,” even if the
[START], [SET], or [CLEAR] buttons should happen to
be pressed, Auto Adjust will not operate (for more on
the lock functions see page 12).

Function Setting Switches

These switches turn on and off each of the following
functions: Filter Wide, Dynamic, Diffuse, Limiter,
Enhancer, Low-Cut Filter, and Hi-Cut Filter. For more
information about each of these functions, please
refer to “About the Function Setting Switches” on
page 13.

* When altering settings, use a ball-point pen or similar

object. Do not apply excessive force to the switches, as
this may damage the unit.

* The fourth switch from the left is not assigned to any

function. Moving this switch has no effect on any
operation.

POWER Indicator

With an AC adaptor connected, this indicator lights
up when the power is on.

PEAK Indicator

This indicator lights during high input signal levels.
The indicator lights up at 6 dB below the level where
distortion begins. If the indicator seems to be lighting
up too frequently, flip the input level switch on the
rear panel.

AUTO Indicator

This indicates the operating status of the Auto Adjust
function.

Lit:

Auto Adjust is completed, and the anti-
feedback filters are set.

Flashing: Auto Adjust is in progress.
Off:

No anti-feedback filters are set.

Summary of Contents for AF-70

Page 1: ...hnical Light Sound Center Khaled Ibn Al Walid St P O Box 13520 Damascus SYRIA TEL 011 2235 384 TURKEY Barkat Muzik aletleri ithalat ve ihracat limited ireketi Siraselviler Cad Billurcu Sok Mucadelle C...

Page 2: ...sonnel Never use or store the unit in places that are Subject to temperature extremes e g direct sunlight in an enclosed vehicle near a heat ing duct on top of heat generating equip ment or are Damp e...

Page 3: ...ion cord Excessive loads can cause the insulation on the cord to heat up and eventually melt through Before using the unit in a foreign country con sult with your dealer or qualified Roland ser vice p...

Page 4: ...y Dynamic Adjust Instantly cuts sudden unexpected feedback Diffuse Function Suppresses the ringing and coloration that occur just before the onset of feedback Built In Functions Effective for Use with...

Page 5: ...h impregnated with a mild non abrasive detergent Afterwards be sure to wipe the unit thoroughly with a soft dry cloth Never use benzene thinners alcohol or solvents of any kind to avoid the possibilit...

Page 6: ...cillatingwhine Turning up the microphone volume pointing the microphone at the speaker bringing the microphone too close to the speaker or raising speaker output levels so that the sound enters the mi...

Page 7: ...Wide Dynamic Diffuse Limiter Enhancer Low Cut Filter and Hi Cut Filter For more information about each of these functions please refer to About the Function Setting Switches on page 13 When altering...

Page 8: ...tch Should ordinarily be set to NOR normal If noise arising from a ground loop should occur while using balanced connections switch it to LIFT INPUT Jack Accepts connection of microphones or the outpu...

Page 9: ...ne plug and is used for balanced input output Unbalanced input output is also supported 2 1 3 1 1 GND 2 HOT 3 COLD 2 3 HOT COLD GND MakingtheConnections As shown in the diagram connect any peripheral...

Page 10: ...ck may occur momentarily during Auto Adjust this is due to the feedback detection operation and settings being made for the safety margin there is nothing abnormal about this Feedback ceases after a b...

Page 11: ...operation Flashing 3 Auto Adjust ends automatically after securing a safety margin of approximately 12 dB The Auto indicator stops flashing and instead will light steadily Theanti feedbackfiltersetti...

Page 12: ...dwidth is automatically slightly broadened and feedback from multiple frequencies is removed with one filter A bandwidth of 1 20 of an octave corresponds to the definition achieved with a 200 band gra...

Page 13: ...hone you can cause the frequency at which feedback is occurring to shift and suppress the growth of feedback The Diffuse function creates such changes in a virtual manner It is also effective in reduc...

Page 14: ...ancer Function Low Cut Filter High Cut Filter Phantom Power 48 V Output Phase Function Output Ground Lift Function Connectors INPUT XLR 3 31 Type 1 4 inch TRS Phone Type for common use OUTPUT XLR 3 32...

Page 15: ...n outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help Unauthorized changes or modification to this system can v...

Page 16: ...hnical Light Sound Center Khaled Ibn Al Walid St P O Box 13520 Damascus SYRIA TEL 011 2235 384 TURKEY Barkat Muzik aletleri ithalat ve ihracat limited ireketi Siraselviler Cad Billurcu Sok Mucadelle C...

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