Alto RSA 27 User manual

Realtime Analyzer
RSA 27
User's Manual
LTO
RR
www.altoproaudio.com
Version 1.3 October 2005
EnglishEnglish

1
SAFETY RELATED SYMBOLS
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
∼
This symbol, wherever used, alerts you to the pre-
sence of un-insulated and dangerous voltages with-
in the product enclosure. These are voltages that
may be sufficient to constitute the risk of electric
shock or death.
Protective Ground Terminal
AC mains (Alternating Current)
Hazardous Live Terminal
ON: Denotes the product is turned on.
This symbol, wherever used, alerts you to impo-
rtant operating and maintenance instructions.
Please read.
OFF: Denotes the product is turned off.
WARNING
Describes precautions that should be observed to
prevent the possibility of death or injury to the user.
CAUTION
Describes precautions that should be observed to
prevent damage to the product.
˙Protective Ground
˙Operating Conditions
IMPORTANT SAFETY INSTRUCTIONS
˙Cleaning
˙Servicing
˙Power Cord and Plug
the recommended fuse type as indicated in this
manual. Do not short-circuit the fuse holder. Before
replacing the fuse, make sure that the product is
OFF and disconnected from the AC outlet.
Before turning the product ON, make sure that it is
connected to Ground. This is to prevent the risk of
electric shock.
Never cut internal or external Ground wires. Likewise,
never remove Ground wiring from the Protective
Ground Terminal.
Always install in accordance with the manufacturer's
instructions.
To avoid the risk of electric shock and damage, do
not subject this product to any liquid/rain or moisture.
Do not use this product when in close proximity to
water.
Do not install this product near any direct heat source.
Do not block areas of ventilation. Failure to do so
could result in fire.
Keep product away from naked flames.
Read these instructions
Follow all instructions
Keep these instructions. Do not discard.
Heed all warnings.
Only use attachments/accessories specified by the
manufacturer.
Do not tamper with the power cord or plug. These are
designed for your safety.
Do not remove Ground connections!
If the plug does not fit your AC outlet seek advice from
a qualified electrician.
Protect the power cord and plug from any physical
stress to avoid risk of electric shock.
Do not place heavy objects on the power cord. This
could cause electric shock or fire.
When required, either blow off dust from the product
or use a dry cloth.
Do not use any solvents such as Benzol or Alcohol.
For safety, keep product clean and free from dust.
Refer all servicing to qualified service personnel only.
Do not perform any servicing other than those instruc-
tions contained within the User's Manual.
˙Fuse
To prevent fire and damage to the product, use only
No user serviceable parts inside.
˙Power Supply
Ensure that the mains source voltage (AC outlet)
matches the voltage rating of the product. Failure
to do so could result in damage to the product and
possibly the user.
Unplug the product before electrical storms occur
and when unused for long periods of time to reduce
the risk of electric shock or fire.
˙External Connection
Always use proper ready-made insulated mains
cabling (power cord). Failure to do so could result
in shock/death or fire. If in doubt, seek advice from
a registered electrician.
˙Do Not Remove Any Covers
Within the product are areas where high voltages
may present. To reduce the risk of electric shock do
not remove any covers unless the AC mains power
cord is removed.
Covers should be removed by qualified service
personnel only.
WARNING
Disposing of this product should not be
placed in municipal waste and should be
Separate collection.

2
Preface
Dear Customer:
For our ▲LTO AUDIO TEAM, music and sound are more than a job...are first of all passion and let us say...our obsession!
We have been designing professional audio products for a long time in cooperation with some of the major brands in
the world in the audio field.
The ▲LTO line presents unparalleled analogue and digital products made by Musicians for Musicians in our R&D
Centres in Italy, Netherlands, United Kingdom and Taiwan. The core of our digital audio products is a sophisticated DSP
(Digital sound processor) and a large range of state of the art algorithms which have been developed by our Software
Team for the last 7 years.
Because we are convinced you are the most important member of ▲LTO AUDIO TEAM and the one confirming the quality
of our job, we would like to share with you our work and our dreams, pay attention to your suggestions and your comments.
Following this idea we create our products and we will create the new ones! From our side, we guarantee you and we will
guarantee you also in future the best quality, and the best fruits of our continuous researches and the best prices.
Thank you very much.
▲LTO AUDIO TEAM
The RSA 27 Realtime analyzer has several features: simple operation interface, realtime spectrum analyzing tool, pink
noise generator and optimizing stage monitor sound quality etc.. You can reduce the feedback effectively depending
on the RSA 27 display. For further details, please go through the user's manual carefully.
Thanks for choosing ▲LTO RSA 27 Realtime Analyzer and thanks for choosing one of the results of ▲LTO AUDIO
TEAM job and researches.
Nothing else to add, but that we would like to thank all the people that made the ▲LTO RSA 27 Realtime Analyzer a
reality available to our customers, thank our designers and all ▲LTO staff, there to make possible the realization of
products containing our idea of music and sound and there to support you, our customers, in the best way, conscious
that you are our best richness.

TABLE OF CONTENT
1. INTRODUCTION ....................................................................................................................................4
2. FEATURE LIST .....................................................................................................................................4
3. CONTROL ELEMENTS..........................................................................................................................4
3.1 The Front Panel
3.2 The Rear Panel
8. WARRANTY ...........................................................................................................................................11
3
4. INSTALLATION & CONNECTION ........................................................................................................6
4.1 Audio Connection
4.2 Rack Mounting
- Wiring Configuration
- In Line Connection
6. TECHNICAL SPECIFICATIONS ...........................................................................................................9
5. APPLICATION.........................................................................................................................................8
7. BLOCK DIAGRAM .............................................................................................................................10

1. INTRODUCTION
2. FEATURE LIST
3. CONTROL ELEMENTS
3.1 The Front Panel
4
Thank you very much for expressing you confidence in LTO products by purchasing our LTO RSA 27 Realtime▲▲
Analyzer. With the RSA27 you have acquired the flexible and applied realtime spectrum analyzing tool and pink noise
generator, which can optimize stage monitor sound quality and reduce feedback problems.
The RSA 27 offers the simple and clear operation interface and excellent performance. It contains the four pushing-
buttons, each of them is equipped with the LED indicator; 28 bar LEDs display, through which, the RSA can react
readily on program materials, then you can find the specific feedback points easily; a input gain control and a MIC
input socket.
In order to get the best out of your RSA 27 Realtime Analyzer, please go through this manual carefully.
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Signal rack unit
Illuminated power switch
27 band in 1/3 octave ISO centers display within a range of 40Hz to 16kHz
3dB/ 6dB range for switch
Pink noise generator
Switch-able +48V phantom power supply
1/4" TRS microphone input
Balanced XLR AUX MIC input
1/4" TRS and XLR connectors for output
Pink noise 1/4" TRS unbalance output
High quality parts and rigid configuration for long life and full credibility
Manufactured under QS9000, VDA6.1 certified management system
1. POWER Switch
Turn the apparatus ON or OFF.
2. MIC INPUT Connector
The MIC input is used to feed the external program source to signal path. Depend on the LINE switch, you can
select to input MIC signal or LINE signal through the connector. For further details, please refer to the (5).
Besides, the MIC input connector is in parallel with the AUX MIC input connector on rear panel, but is used to
input prior to AUX MIC input.
LTO
R
3dB
±
ON
OFF
POWER
INPUT
RANGE
PINK NOISE
LINE
PHANTOM
MIC INPUT
GAIN
dB
40
20
16
6010
－12 ＋12
0
40 50 63 80 100 125 160 200 250 315 400 500 630 800 1K 1.25K 1.6K 2K 2.5K 3.15K 4K 5K 6.3K 8K 10K 16K12.5K
0
－
＋
INPUT
LEVEL 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1K 1.25K 1.6K 2K 2.5K 3.15K 4K 5K 6.3K 8K 10K 16K12.5K
－8
＋15
CLIP
－15
－24
＋8
REALTIME
ANALYZER
RSA27
0
6dB
±
3. INPUT GAIN Control
Rotating this control will give you proper gain. The control is provided with two different indication rings, when
releasing the LINE switch (5), you should read the inside ring (10dB ~ 60dB) indication; otherwise, pressing the
switch allows you read the outside ring (-12dB ~ +12dB) indication.
2
3
4
5 6 7 8 9 1