RCF BM 3022 User Manual
USER MANUAL
MANUALE D’USO
BM 3022
PRE-AMPLIFIED
DESK-TOP PAGING
MICROPHONE
BASE MICROFONICA
PREAMPLIFICATA DA
TAVOLO
INDEX
INDICE
ENGLISH
SAFETY PRECAUTIONS
DESCRIPTION
OPERATION AND INTERNAL SETTINGS
REAR PANEL AND CONNECTIONS
FRONT PANEL
SPECIFICATIONS
ITALIANO
AVVERTENZE PER LA SICUREZZA
DESCRIZIONE
FUNZIONAMENTO ED IMPOSTAZIONI ALL’INTERNO
PANNELLO POSTERIORE E COLLEGAMENTO
PANNELLO FRONTALE
DATI TECNICI
4
5
5
9
11
12
14
15
15
19
21
22
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ENGLISH
IMPORTANT NOTES
SAFETY
PRECAUTIONS
IMPORTANT NOTES
Before connecting and using this paging microphone, please read this instruction
manual carefully and keep it on hand for future reference. The manual is to be
considered an integral part of this product and must accompany it when changing
ownership as a reference for correct installation and use as well as for the safety
precautions.
RCF S.p.A. will not assume any responsibility for the incorrect installation and / or use
of this product.
SAFETY PRECAUTIONS
1. All the precautions, in particular the safety ones, must be read with special attention,
as they provide important information.
2. Make sure all connections have been made correctly before switching all devices on.
Do not connect / disconnect the paging microphone when the system is operating.
3. Protect paging microphone cables from damage and assure they are positioned
where these cannot be stepped on or crushed by objects.
4. Do not put the paging microphone into water (or another liquid), do not throw it.
5. Never attempt to carry out any operations, modifications or repairs.
If the paging microphone does not work properly, contact your authorized service centre.
6. Should the paging microphone emit any strange odour or even smoke, turn the sound
system off immediately, disconnect the paging microphone and its adapter from the
mains.
7. RCF S.p.A. strongly recommends the sound system installation is only made by
professional qualified installers (or specialised firms), who can certify it according to the
regulations in force.
The entire audio system must comply with the current standards and regulations
regarding electrical systems.
8. There are numerous mechanical and electrical factors to be considered when
installing a professional audio system (in addition to those which are strictly acoustic,
such as sound pressure, angles of coverage, frequency response, etc.).
9. Do not point the microphone at near loudspeakers, in order to avoid feedback.
10. Hearing loss
Exposure to high sound levels can cause permanent hearing loss. The acoustic pressure
level that leads to hearing loss is different from person to person and depends on the
duration of exposure.
To prevent potentially dangerous exposure to high levels of acoustic pressure, anyone
who is exposed to these levels should use adequate protection devices.
When a transducer capable of producing high sound levels is being used, it is therefore
necessary to wear ear plugs or protective earphones.
11. To prevent inductive effects from causing hum, noise and a bad system operating,
paging microphone cables should not be laid together with other electric cables (mains)
and loudspeaker lines.
12. Keep the paging microphone far from any excessive heat source.
13. Do not use solvents, alcohol, benzene or other volatile substances for cleaning the
external parts. Just use a dry cloth.
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RCF S.P.A. THANKS YOU FOR PURCHASING THIS PRODUCT, WHICH
HAS BEEN DESIGNED TO GUARANTEE RELIABILITY AND HIGH
PERFORMANCE.
BM 3022 is a pre-amplified desk-top paging microphone with an electret capsule.
Its output audio signal level (balanced and adjustable through a trimmer) allows
its connection to “line” inputs of mixer-amplifiers, even for long distances
(up to 1 km / c. 3300 ft) through CAT5 cable.
Every paging microphone has an automatic gain control (AGC), a compressor /
limiter that (if enabled) normalizes the microphone signal level, regardless of the
voice intensity.
Up to 30 BM 3022 paging microphones can be linked in series (‘daisy-chain’, in
a single line) and used either in mixing (more microphones activated at the same
time) or in interlocking (only a single microphone activated at a time).
One or more paging microphones can have priority and be activated at any time,
disabling all other paging microphones without priority.
When activating a microphone, the announcement can be preceded by a chime.
A RCF AC AD2405 adapter (24 V dc) is included. This can be used a power
supply unit for max. 4 BM 3022 paging microphones.
Before connecting each BM 3022 paging microphone, it is necessary to set its
internal dip-switches (according to the chosen operation and options).
Unscrew the 6 fixing screws of the rear cover to open the paging microphone
and access the 8 dip-switches.
DESCRIPTION
OPERATION AND INTERNAL SETTINGS
THE 6 SCREWS
OF THE REAR COVERDIP-SWITCHES
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ENGLISH
DIP-SWITCH no. 1: AGC (Automatic Gain Control)
Compressor / limiter that (if enabled) normalizes the microphone signal level,
regardless of the voice intensity.
Suggested setting: ON.
DIP-SWITCH no.2: Priority
Priority of the BM 3022 paging microphone on all the others (without priority)
linked in the same line.
The paging microphone(s) having priority can engage the audio channel at any
time, temporarily disabling all the other paging microphones without priority.
When the system is set to the ‘interlocking’ mode (all dip-switches no.3 set to
‘I/Lock’), only one paging microphone with priority can be activated (the first in
chronological order).
DIP-SWITCH no.3: Mixing mode (Mix) – Interlocking mode (I/Lock)
This seTTing is necessary when 2 or more Bm 3022 paging microphones are linked TogeTher
in The same line.
All paging microphone dip-switches no.3 shall have the same setting (either
‘Mix’ or ‘I/Lock’).
Mixing mode: in a line made of 2 or more BM 3022 paging microphones, the
audio signal of each microphone (if activated through the TALK button) is always
mixed (on the shared audio channel) with all the others.
Interlocking mode: in a line made of 2 or more BM 3022 paging microphones,
only one at a time can be activated (the first in chronological order). The ‘busy’
indication (LED: flashing red) will appear on all the other paging microphones,
which will need to wait until the line is available again.
The paging microphones having prioriTy are excepTions: These can engage The audio channel
aT any Time and Temporarily disaBle all The oTher paging microphones wiThouT prioriTy.
when The sysTem is seT To The ‘inTerlocking’ mode, only one paging microphone wiTh prioriTy
can Be acTivaTed (The firsT in chronological order).
ON
ON
I/Lock: interlocking
ON
ON
Low: low sensitivity
(high threshold)
Long: 30 s
ON
1
2
3
4
5
6
7
8
AGC – Automatic gain control
Priority
Mixing / Interlocking mode
Chime
VOX function
VOX Level (sensitivity)
VOX Release time
SMART PTT – TALK button toggling
OFF
OFF
Mix: mixing
OFF
OFF
Hi: high sensitivity
(low threshold)
(Short): 3 s
OFF
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DIP-SWITCH no.4: Chime
If enabled, when pressing the TALK button, the chime is played (preceding an
announcement).
The chime level is adjustable through the dedicated trimmer.
DIP-SWITCH no.5: VOX function
If the VOX function is enabled, after pressing the TALK button, the microphone will automatically get open only if its capsule detects a sound with a level
that exceeds the predetermined threshold and will be automatically muted
(after the ‘VOX Release time’, see dip-switch no.7) as soon as the sound level
returns below the threshold.
The vox funcTion can Be useful To avoid possiBle acousTic feedBacks (‘ larsen effecT’),
as microphones are muTed when noT used.
DIP-SWITCH no.6: VOX Level (sensitivity)
It allows to choose the VOX sensitivity between 2 levels:
- Hi: high sensitivity (low threshold), the microphone gets open with low voice
- Low: low sensitivity (high threshold), the microphone gets open with loud
voice.
DIP-SWITCH no.7: VOX Release time
Setting of the VOX release time, which is the time between the absence of
a sound with a level above the predetermined threshold and the automatic
closing of the microphone.
The options are:
- (Short): 3 seconds, suitable for conferences, where each microphone gets
muted immediately after the intervention of the speaker.
- Long: the microphone stays open for at least 30 seconds even if the sound is
absent, then the paging microphone is automatically disabled (like pressing
the TALK button again).
This mode is preferable if paging microphones are mainly used for
announcements.
DIP-SWITCH no.8: SMART PTT – TALK button toggling
The TALK button turns the microphone on.
If this dip-switch is set to OFF, the TALK button must be held down when
speaking (and released at the end).
If this dip-switch is set to ON, the TALK button operates in ‘SMART’ mode,
allowing to toggle it:
- If the TALK button is pressed and quickly released, the microphone will be
turned on / off (‘toggle’).
- If the TALK is pressed and held down, the microphone will stay open until
the TALK button release (even if it has been previously activated as ‘toggle’).
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EXAMPLES
— SUPERMARKET
A BM 3022 paging microphone is placed on every cash desk.
All paging microphones are linked in series (‘daisy-chain’) and interlocked
one another.
Dip-switch 2 and 3 settings on all paging microphones:
- dip-switch no.2: OFF (no priority)
- dip-switch no.3: I/Lock (interlocking mode)
As option, it is possible to add a BM 3022 paging microphone having priority
(dip-switch no.2 set to ON) for the head office.
— CONFERENCE HALL
One BM 3022 for every delegate and one having priority for the chairman.
All paging microphones are linked in series (‘daisy-chain’) and operating in
mixing mode (but the chairman’s one with priority).
Dip-switch 2 and 3 settings:
- dip-switch no.2 (delegates’ microphones): OFF (no priority)
- dip-switch no.2 (chairman’s microphone): ON (with priority)
- dip-switch no.3: Mix (mixing mode)
PRIORITY: ON
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