FARA Instructional Manual
Instructions for Use
The evolution wireless series
It offers musicians and video and sound amateurs high-quality state-of-the-art RF transmission systems
with a high level of operational reliability and ease of use. The transmitters and receivers permit wireless
transmission with studio-quality sound. The excellent transmission reliability of the series is based on the use of:
• further optimized PLL synthesizer and microprocessor technology,
• the HDX noise reductions system,
• the pilot tone squelch control,
• the true diversity technology (rack-mount receiver only)
• and the scan function for scanning the channel banks for free channels
The channel bank system
The systems are available in five UHF frequency ranges with 1440 transmission/receiving frequencies per
frequency range. Please note: Frequency usage is different for each country. Your model agent will have all the
necessary details on the available legal frequencies for your area:
• Range A:
518 to 554 MHz
• Range B:
626 to 662 MHz
• Range C:
740 to 776 MHz
• Range D:
786 to 822 MHz
• Range E:
830 to 866 MHz
Transmitters and receivers have nine channel banks with four switchable channels each.
The channel banks “1” to “8” have four switchable channels that are factory-preset to a transmission/receiving
frequency (see enclosed frequency table). These transmission/receiving frequencies cannot be changed but have
been preset so that e.c. Country-specific regulations on frequency usage are taken into account. The channel
bank “U” (user bank) has four switchable channels to store your selection of 1440 transmission/receiving
frequencies that are freely selectable within the preset frequency range.
An advantage of the factory-preset frequencies is that
• the systems are ready for immediate use after switch-on,
• several systems can be operated simultaneously on the preset channels without causing intermodulation
interference.
Overview of operating controls
Operating Controls
LC Display Panel
1. LC Display
1. Display for the current channel bank “1...8,
2. UP button
U”
3. DOWN button
2. Display for the current channel number “1...4”
4. SET button
3. “B.CH” - abbreviation for the channel Bank
5. POWER button (serves as the ESC (cancel)
and CHannel number
key in the operating menu
4. Alphanumeric display
6. Cable grip for power supply DC cable
5. “MHz” - appears when the frequency is
7. DC socket for connection of mains unit (DC
displayed
IN)
6. Transmitter low battery icon (LOW BAT
8. Audio output (AF OUT BAL) XLR-3M socket,
warning)
balanced
7. Lock mode icon (lock mode is activate)
9. Audio output (AF OUT UNBAL), 1/4” (6.3
8. 8-step level display for received RF signal
mm) jack socket, unbalanced
“RF”
10. Service interface (DATA)
9. 8-step level display for received audio signal
11. Antenna input II (ANT II), BNC socket
“AF”, with “PEAK” warning
12. Type plate
10. “PILOT” display (pilot tone evaluation is
13. Antenna input I (ANT I), BNC socket
activated)
11. Diversity display (antenna I or antenna II
active)
12. “MUTE” display (audio output is muted)
Operating Controls
1. Sound inlet basket
2. Color-coded identification ring for
microphone heads
green: MD 835 microphone head
blue: MD 845 microphone head
red: ME 865 microphone head
3. Body of radio-microphone
4. Battery compartment (not visible from
outside)
5. Display section
6. LC display
7. Turnable protective cap for operating controls
(shown removed)
The following operating controls become accessible
in turn by turning the protective cap:
8. SET button
9. DOWN button
10. UP button
11. Red LED for operation and battery
status indication (ON/LOW BAT)
12. ON/OFF button (serves as the ESC
(cancel) key in the operating menu)
13. MUTE switch
LC Display Panel
1. Alphanumeric display
2. “B.CH” - abbreviation for the channel Bank
and CHannel number
3. “MHz” - appears when the frequency is
displayed
4. 4-step battery status display
5. Lock mode icon (lock mode is activate)
6. “PILOT” display (pilot tone evaluation is
activated)
7. “MUTE” display (audio output is muted)
8. 7-step level display for received audio signal
“AF”
Indications and displays on the receivers
The level display for audio signal “AF” shows the modulation of the
transmitter.
When the transmitter's audio input level is excessively high (AF peak),
the receiver's level display for audio signal “AF” shows full detection.
The “PILOT” display I or II lights up when the pilot tone evaluation is
activated (see: “Activating/deactivating the pilot tone transmission or
pilot tone evaluation” on page 21).
The receiver operates on the true diversity principle.
The diversity display indicates whether diversity section I (i.e. antenna
1) or diversity section II (i.e. antenna 2) is active.
After pressing a button, the display remains backlit for approx. 15
seconds.
Indications and displays on the transmitters
The red LED (LOW BAT/ON) provides information on the current
operating state of the transmitter:
Red LED lit up:
The transmitter is switched on and the capacity
of the batteries is sufficient.
Red LED flashing:
The batteries are going flat (LOW BAT)!
In Addition, the 4-step battery status display on the display panel
provides information on the remaining battery capacity:
3 segments:
capacity approx. 100%
2 segments:
capacity approx. 70%
1 segment:
capacity approx 30%
Battery icon flashing: LOW BAT
The “MUTE” display appears on the display panel when the
transmitter is muted (see: “Muting the transmitters” on page 11).
The level display for audio signal (AF) shows the modulation of the
transmitter.
The yellow LED (AF PEAK) at the front of the receiver lights up when
the audio input level is excessively high (AF peak) and overmodulates the transmitter. At the same time, the 7-step level display
for audio signal “AF” shows full deflection for the duration of the overmodulation
The “PILOT” display lights up on the transmitter display panel if the
pilot tone transmission is activated (see: “Activating/deactivating the
pilot tone transmission or pilot tone evaluation” on page 20s).
After pressing a button, the display remains backlit for approx. 15
seconds.
Preparing the components for use
rack-mount receiver
To ensure that the receiver cannot slip on the surface on which it is
placed, four self-adhesive soft rubber feet are supplied.
Ensure that the base of the receiver is clean before mounting
the rubber feet.
Fix the rubber feet to the base of the receiver by peeling off the
safety paper and fitting them as shown in the diagram on the
left.
Some furniture surfaces have been treated with varnish, polish,
or synthetics. Despite a thorough testing of the synthetics used
by us, we cannot rule out the possibility of staining.
The supplied telescopic antennas can be mounted quickly and easily
to the rear of the receiver and are suitable for all applications where –
good reception conditions provided – a wireless transmission system
is to be used without a large amount of installation work.
Connect the telescopic antennas to the BNC sockets at the
rear of the receiver.
Pull the telescopic antennas out and align them upwards in a
V-shape.
The is powered via a mains unit.
Pass the cable through the cable grip.
Insert the DC connector on the mains cable into the DC socket.
The audio outputs are available as an XLR-3M socket and a 1/4” (6.3 mm)
jack socket, allowing you to simultaneously connect two units (ie. Amplifier,
mixing console). The adjusted audio output level is common for both sockets.
Connect the amplifier/mixing console to the XLR-3M socket or the 1/4”
(6.3 mm) jack socket.
Via the operating menu, adapt the level of the audio output (AF OUT)
to the input of the amplifier or mixing console (see: “ Adjusting the
audio output level (receivers only)” on page 18).
The service interface is only required for servicing purposes.
For mounting one or two receivers into a 19” rack, you require the GA 2 rack
adapter. The GA 2 rack adapter consists of:
• 2 rack mount “ears”
• 1 connecting bar
• 1 connecting plate
• 2 covering plugs for antenna holes
• 12 recessed head screws M 3x6
• 2 recessed head screws M 6x10
When mounting only one receiver into a rack, you can use the AM 2 antenna
mount (available as an accessory) to the mount on the transmitter's antenna
connection to the front of the GA 2 rack adapter. The AM 2 antenna mount
consists of:
• 2 BNC extension cables (screw-in BNC socket to BNC connector)
• 2 plains washers
• 2 nuts
To mount two into a rack:
Place the two receivers side by side onto a flat surface, their bottom
sides facing upwards.
Align the connecting plate over the holes in the bottom sides of the
receivers.
Secure the connecting plate to the receivers using eight of the
supplied recessed head screws (M 3x6).
Hook the two rack mount “ears” to the front panels of the receivers.
Secure the rack mount “ears” to the receivers using two of the
supplied recessed head screws (M 3x6).
Slide the receivers into a 19” rack.
Screw the rack mount “ears” tight.
When mounting only one receiver into a rack, use the connecting bar instead
of the second receiver.
Hook the two rack mount “ears” to the front panel of the receiver.
Secure the rack mount “ears” to the receiver using two of the supplied
recessed head screws (M 3x6) respectively.
Secure the connecting bar to one of the rack mount “ears” using two
of the supplied recessed head screws (M 6x10).
If you are not front mounting the antennas, insert the two covering
plugs into the antenna holes of the connecting bar.
Slide the receiver into a 19” rack.
Screw the rack mount “ears” tight.
To mount the receiver's antenna connection to the front of the GA 2 rack
adapter using the AM 2 antenna mount:
Screw the two BNC sockets of the BNC extension cables to the
connecting bar using the supplied plain washers and nuts.
Connect the two BNC connectors to the BNC sockets at the rear of
the receiver.
Slide the receiver into a 19” rack.
Screw the rack mount “ears” tight.
Connect the two telescopic antennas to the two BNC sockets.
Pull the telescopic antennas out and align them upwards in a V-shape.
Radio-microphone
For powering the radio-microphone, you can either use two 1.5 V AA
size batteries or the rechargeable Sennheiser BA 2015 accupack.
➢ Unscrew the display section from the radio microphone body
by turning it counterclockwise.
➢ Slide the display section as far as it will go.
➢ Open the battery compartment cover.
➢ Insert the two batteries or the BA 2015 accupack as shown in
the diagram on the left. Please observe correct polarity when
inserting the batteries/accupack.
➢ Close the battery compartment cover.
➢ Push the battery compartment into the radio-microphone’s
body.
➢ Screw the display section tight.
Changing the microphone head:
➢ First remove the batteries/accupack as described above and
leave the radio-microphone open.
➢ Unscrew the sound inlet basket.
➢ Loosen the screw and put it to one side.
➢ Gently ease the capsule out of the contacts and then pull it out
of the housing as shown. Do not touch the contacts and the
diaphragm!
➢ Insert the new capsule.
➢ Secure the capsule by tightening the screw.
NOTE:
The screw mechanically secures the microphone capsule. If the screw
is missing, malfunctions may occur during tough use.
➢ Put the sound inlet basket and identification ring supplied with
the new microphone head (NB: do NOT use the old basket, as
different heads use slightly differing internal foam) and screw it
tight.
➢ Insert the batteries/accupack.
➢ Close the radio-microphone and put it into operation.
NOTE:
Microphone capsule, sound inlet basket and foam insert form an
acoustic unit and must therefore always be exchanged all together.
Each microphone head comes with a color-coded identification right to
distinguish different microphone heads from each other (green = MD
835, blue = MD 845, red = ME 865).
Using the components
Switching the components on/off
The new transmitters and receivers can only be switched off when the
standard display is shown on the display panel. Within the operating
menu the ON/OFF button or the POWER button serves as the ESC
(cancel) key, i.e. you cancel your entry and return to the standard
display.
NOTE:
Remove the batteries or the accupack when the units will not be used
for extended periods of time.
Switching the rack-mount receiver to ON/OFF:
➢ Press the POWER button to switch the receiver on.
➢ To switch the receiver off, press the POWER button until “OFF”
appears on the display.
Switching the radio-microphone ON/OFF:
➢ Turn the protective cap at the bottom of the radio-microphone
so that the ON/OFF button becomes accessible
➢ Press the ON/OFF button to switch the radio-microphone on.
The red LED lights up.
➢ To switch the radio-microphone off, press the ON/OFF button
until “OFF” appears on the display. The red LED goes off.
Muting the transmitters
All transmitters have a MUTE switch that noiselessly mutes the
transmitter's audio signal without switching the transmitter off.
➢ Turn the protective cap at the bottom of the radio-microphone
so that the MUTE switch becomes accessible.
➢ Set the MUTE switch to the position “MUTE”. The “MUTE”
display appears on the transmitter display panel. Provided that
the pilot tone function is activated on both the transmitter and
the receiver, the “MUTE” display also appears on the receiver
display panel.
➢ Set the MUTE switch back to the original position to re-transmit
the audio signal.
Activating/deactivating the lock mode
All transmitters and receivers have a lock mode that can be activated
or deactivated via the operating menu (see: “Activating/deactivating
the lock mode” on page 22). The lock mode prevents that the
transmitter or receiver is accidentally programmed or switched off
during the operation.
The operating menu
A special feature of the series is the similar, intuitive operation. As a result, the units are easy to operate and
adjustments to the settings can be made quickly and “without looking” - even in stressful situations, for example
on stage or during a live show or presentation.
The buttons
Buttons
ON / OFF or POWER
SET
Mode
To ...
Standard display
Turn the transmitter or receiver on or off
Operating menu
Cancel the entry and return to the standard display
Setting mode
Cancel the entry and return to the standard display
Standard Display
Get into the operating menu
Operating menu
Get into the setting mode of the selected menu
Setting mode
Store the settings and return to the previous menu level
Standard display
Without function
Operating menu
Change to the previous menu or change to the next menu
Setting mode
Adjust the setting of the selected menu option
Overview of menus
Display
Receivers
Transmitters
BANK
Switching between channel banks
Switching between channel banks
CHAN
Switching between the channels in a channel
bank
Switching between the channels in a channel
bank
TUNE
Setting a receiving frequency for the channel
bank “U” (user bank)
Setting a receiving frequency for the channel bank
“U” (user bank)
SCAN
Scanning the selected channel bank for free
channel
--------------------
SENSIT
--------------------
Adjusting the sensitivity (AF)
AF OUT
Adjusting the audio output level
--------------------
SQUELCH Adjusting the squelch threshold
--------------------
DISPLY
Selecting the standard display
Selecting the standard display
NAME
Entering a name
Entering a name
RESET
Loading the factory-preset default settings
Loading the factory-preset default settings
PILOT
Activating/deactivating the pilot tone evaluation
Activating/deactivating the pilot tone evaluation
LOCK
Activating/deactivating the lock mode
Activating/deactivating the lock mode
EXIT
Exiting the operating menu and returning to the Exiting the operating menu and returning to the
standard display
standard display
Working with the operating menu
By way of the example of “TUNE” menu, this section describes how to
use the operating menu.
After switching the unit on, the standard display is shown on the
display panel.
Getting into the operating menu:
➢ Press the SET button to get from the standard display into the
operating menu. The last selected menu selected flashes on
the display.
Selecting a menu:
➢ Press the arrow keys to select a menu.
➢ Press the SET button to get into the setting mode of the
selected menu. The current setting that can be adjusted
flashes on the display.
Adjusting a setting:
Press the arrow buttons to adjust the setting. By briefly
pressing the arrow buttons, the display jumps either forwards
or backwards to the next setting. In the “CHAN” “TUNE” and
“NAME” menu, the arrow buttons feature a “fast search”
function. If you hold down a button, the display cycles
continuously. The “fast search” function allows you to get fast
and easily to your desired setting. The new setting flashes on
the display until it is stored.
Storing a setting:
Press the SET button to store the setting. “STORED” appears
on the display, indicating that the setting has been stored. The
display then returns to the previous menu.
With most menus, new settings become effective immediately
without having to be stored.
Exiting the menu:
Select the SET menu to exit the operating menu and return to
the standard display.
When you have entered the operating menu, the ON/OFF
button or the POWER button serves as the EC (cancel) key,
i.e. by briefly pressing the ON/OFF or POWER button, you can
cancel your entry and return to the standard display.
Operating menu of the transmitters
Adjustment tips for the operating menu
BANK
Switching between channel banks
Via the “BANK” menu, you can switch between the nine channel banks of the
transmitters and receivers. The channel banks “1” to “8” have four switchable
channels that are factory-preset to a transmission/receiving frequency (see “The
channel bank system” on page 2). The channel bank “U” (user bank) has four
switchable channels to store your selection out of 1440 transmission/receiving
frequencies that are freely selectable within the reset frequency range.
When switching from one channel bank to another, the channel with the lowest
channel number is automatically displayed. If, during the last scan of this channel
bank, an interfering frequency was detected on the channel with the lowest channel
number (see “Scanning the channel banks for free channels (receivers only)” on
page 18), the receiver display panel automatically displays the next free channel.
CHAN
Switching between the channels in a channel banks
Via the “CHAN” menu, you can switch between the four channels in a channel bank.
Always set the transmitter and the receiver of a transmission] link to the same
channel. After scanning a channel bank (see “Scanning the channel banks for free
channels (receivers only)” on page 18), only the free channels are displayed. Set the
transmitter to one of the free channels.
Selecting the frequencies to be stored in the channel bank “U”
Via the “BANK” menu, you can select the frequencies to be stored in the channel
bank “U” (user bank).
When you have selected one of the channel banks “1” to “8” and then select the
“BANK” menu, the transmitter or receiver automatically switches to channel 01 of the
channel bank “U”. In this case, “U.01” briefly appears on the display.
Use the up/down arrow buttons to select the desired transmission or receiving
frequency. Transmission and receiving frequencies are turnable in 25-kHz
steps within a switching bandwidth of 36 MHz max. For intermodulation-free
frequencies, please refer to the enclosed frequency table.
Scanning the channel banks for free channels (receivers only)
Before putting one or several transmission links into operation, you should scan the
selected channel bank for free channels in order to ensure intermodulation-free
operation of your system.
Starting the scan and storing the scan result
➢ Before starting the scan, switch all transmitters of your system off, since
channels used by switched-on transmitters will not be displayed as “free
channels”
➢ Select the “SCAN” menu.
➢ Select “START” and confirm your selection by pressing the SET button. After
the scan is completed, the number of free channels is displayed. Pressing the
SET button once more will store the scan results and lock all channels that
are used or subject to interference.
Releasing locked channels
➢ Select the “SCAN” menu.
➢ Select “CLEAR” and confirm your selection by pressing the SET button. All
channels in this channel bank can now be selected again.
Multi-channel operation
For multi-channel operation, only use the free channels in a channel bank.
Before putting the transmission links into operation, we recommend performing an
auto-scan.
➢ Select the channel bank on the receiver.
➢ Scan this channel bank for free channels. If not enough free channels are
available in the selected channel bank, repeat the scan with another channel
bank.
➢ Apply the scan result to all other transmitters and receivers.
Adjusting the sensitivity (transmitters only)
Via the “SENSIT” menu, you can adjust the modulation level of the transmitters. This
changes the transmitter's input sensitivity.
The input sensitivity is adjusted to high when close talking distances, speakers with
loud voices or loud music passages cause over-modulation in the transmission link.
In this case, the yellow LED (AF PEAK) will light up and the receiver's level display
for audio signal (AF) will show full detection.
If, on the other hand, the sensitivity is adjusted too low, the transmission link will be
under-modulated, which would result in a signal with a high background noise.
The sensitivity is correctly adjusted when the level display for the audio signal “AF”
shows full deflection only during the loudest passage.
NOTE: For monitoring the adjusted sensitivity, the transmitter's level display for audio
signal (AF) always indicated the audio level – even if the transmitter is muted.
The following figures are a guide to the best settings:
• Loud music/vocals:
-30 to -20 dB
• Presentations:
-20 to -10 dB
• Interviews:
-10 to 0 dB
• Musical instruments:
◦ electric guitars with single coil pickups:
◦ electric guitars with humbucker pickups:
◦ guitars with active electronics
(active pickups, active EQs, piezo pickups):
-10 to 0 dB
-20 to -10 dB
-30 to -20 dB
Adjusting the audio output level (receivers only)
AF OUT
Via the “AF OUT” menu, you can adjust the audio output level of the receivers. The
level can be adjusted in eight sets. Adapt the level of the audio output (AF OUT) to
the input of the connect unit. The following figures are a guide to the best settings:
•
•
Line level input:
Microphone level input
0 bis +18 dB 0 bis +12 dB
-24 bid -6 dB -30 bis -6 dB
Adjusting the squelch threshold (receivers only)
SQELCH
The receiver is equipped with a squelch that can be adjusted via the “SQELCH”
menu. The squelch eliminates annoying noise when the transmitter is switched off. It
also suppresses sudden noise when there is no longer sufficient transmitter power
received by the receiver.
NOTE: Before adjusting the squelch threshold to a different setting, set the volume
on a connected amplifier to the minimum.
There are three possible squelch settings:
• LO
= low
• MID = middle
• HI
= hi
Selecting the setting “LO” reduces the squelch threshold, selecting the setting “HI”
increases the squelch threshold. Adjust the squelch threshold – with the transmitter
switched off – to the lowest possible setting that suppresses hissing noise.
If the squelch threshold is adjusted too high, the transmission range will be reduced.
Therefore, always adjust the squelch threshold to the lowest possible setting. The
squelch threshold is factory preset to “LO”.
Selecting the standard display
DISPLY
Via the “DISPLY” menu, you can select the standard display.
Selectable Standard
Display
Content of standard display
“FREQ”
“NAME”
“CHAN”
----------
Entering a name
NAME
Via the “NAME” menu, you can enter a freely selectable name for each transmitter
and receiver. You can, for example, enter the name of the performer for whom the
adjustments have been made.
The name can be displayed on the standard display and can consist of up to six
characters such as:
• letters (without pronunciation marks),
• numbers from 0 to 9,
• special characters, e.g. () - . _ and spaces.
To enter a name, proceed as follows:
➢ Press the “SET” button to get into the setting mode of the “NAME” menu. The
first segment starts flashing on the display.
➢ With the up/down arrow buttons you can now select a character. By briefly
pressing a button, the display jumps either forwards or backwards to the next
character. If you hold down a button, the display starts cycling continuously.
➢ Press the SET button to change to the next segment and select the next
character.
➢ Have you entered the name completely? Press the SET button to store your
setting and return to the previous menu level.
Loading the factory-preset default settings
RESET
Via the “RESET” menu, you can load the factory-preset default settings. Only the
selected setting for the pilot tone remains unchanged. After the reset, the unit is
restarted and the standard display is shown on the display panel.
Activating/deactivating the pilot tone transmission or
pilot tone evaluation
PILOT
Via the “PILOT” menu, you can activate or deactivate the pilot tone transmission of
the transmitters and the pilot tone evaluation of the receivers.
The pilot tone supports the squelch function (SQELCH) and protects against
interference due to RF signals from other units. The transmitter adds an inaudible
signal, known as the pilot tone, to the transmitted signal. The receiver detects and
evaluates the pilot tone, and is then able to identify the signal of the matching
transmitter and mute all others.
Transmitters of the series (first generation) do not transmit a pilot tone and receivers
of the series (first generation) cannot evaluate the pilot tone. Nevertheless, you can
combine units of the series (first generation) with units of the series (second
generation).
However, when combining units, please observe the following:
• With a transmitter and a receiver:
Activate the pilot function with both transmitter and receiver.
• With a transmitter and a receiver or vice versa:
Deactivate the pilot tone function with the transmitter or receiver.
Activating/deactivating the lock mode
LOCK
Via the “LOCK” menu, you can activate or deactivate the lock mode.
The lock mode prevents that the transmitter or receiver is accidentally
programmed or switched off during operation. The lock mode icon on the
display indicated that the lock mode is activated.
To deactivate the lock mode, first press the SET button. The press the up or
down arrow buttons to select the “LOCK.OFF”. If you confirm your selection
by pressing the SET button, “LOCK.OFF” appears on the display and the
buttons can be operated as usual.
Exiting the operating menu
Vi the EXIT menu, you can exit the operating menu and return to the standard
display.
If problems occur
Error Checklist
Problem
Possible Cause
Possible Solution
No operation indication
Batteries or accupack are flat
Replace batteries or recharge the
accupack
No mains connection
Check the connection of the mains
unit
Transmitter and receiver are not on
the same channel
Set transmitter and receiver to the
same channel
Transmitter is out of range
Check the squelch setting (see “
Adjusting the squelch threshold
(receivers only)” on page 20) or
reduce the distance between
transmitter and receiving antenna
No RF signal
RF signal available, no audio signal, Transmitter is muted (“MUTE”)
“MUTE” display appears on the
display panel
Audio signal has a high level of
background noise
Audio signal is distorted
No access to a certain channel
Deactivate the muting function
Receiver's squelch threshold is
adjusted too high
See “ Adjusting the squelch
threshold (receivers only)” on page
20
Transmitter doesn't transmit a pilot
tone
See “Activating/deactivating the pilot
tone transmission or pilot tone
evaluation” on page 22
Transmitter sensitivity is adjusted
too low
See “Adjusting the sensitivity
(transmitter only” on page 19
Receiver's AF output level is
adjusted too low
See “adjusting the audio output level
(receivers only)” on page 20
Transmitter sensitivity is adjusted
too high
See “Adjusting the sensitivity
(transmitter only” on page 19
Receiver's AF output level is
adjusted too high
See “adjusting the audio output level
(receivers only)” on page 20
During scanning, an RF signal has
been detected on this channel and
the channel has been locked
See “Scanning the channel banks
for free channels (receivers only)” on
page 18
During scanning, a transmitter of
your system operating on this
channel has not been switched off
See “Multi-channel operation” on
page 19
If problems occur that are not listed in the above table or if the problems cannot be solved with the proposed
solutions, please contact your local agent for assistance.
Recommendations and tips
•
•
•
•
•
•
•
To reduce level variations to a minimum when the user turns his or her head away from the microphone,
attach the microphone as centrally as possible.
To protect the microphone against excessive sweat and moisture, avoid direct skin contact.
Attach the microphone carefully and conduct the cable so that noise due to friction is avoided.
Always use the directional microphone with the windshield and direct the microphone towards the sound
source (e.g. mouth).
Hold the middle of the microphone body. Holding it close to the sound inlet basket will influence the
microphone's pick-up pattern, holding it at the lower part of the body will reduce the transmitter's range.
You can vary the bass reproduction by increasing/decreasing the talking distance to the microphone.
For best results, make sure that the transmitter sensitivity is correctly adjusted.
.. for optimum reception
• Transmission range depends to a large extent on the location and can vary from about 10 m to about 150
m. There should be a “free line of sight” between transmitting and receiving antennas.
• If, with the receiver, the reception conditions are unfavorable, you should use two remote antennas, which
are connected via antenna cable.
• To avoid over-modulating the receiver, observe a minimum distance of 5 m between transmitting and
receiving antennas.
• Observe a minimum distance of 50 cm between receiving antennas and metal objects (such as cross
members or reinforced concrete walls).
• For multichannel operation, you can only use the channels in a channel bank. Each of the channel banks
“1” to “8” accommodates four factory preset frequencies which are intermodulation-free. For alternative
frequency combinations, please refer to the enclosed frequency table. The freely selectable frequencies
can be selected using the “BANK” menu and can be stored in the channel bank “U”.
• when using several transmitters simultaneously, interference can be avoided by maintaining a minimum
distance of 20 cm between two transmitters.
Care and maintenance
Use slightly damp cloth to clean the units from time to time.
NOTE: Do not use any cleansing agent or solvents.
To clean the sound inlet basket, proceed as follows:
➢ Unscrew the sound inlet basket (turn counterclockwise) and remove it.
➢ Remove the foam insert.
➢ Use a slightly damp cloth to clean the sound inlet basket from the inside and outside.
➢ Reinsert the foam insert.
➢ Replace the sound inlet basket and screw it tightly (taking care not to lose the colored identification ring).
Additional information
Progress you can hear:
The evolution wireless series is equipped with HDX, the noise reduction system that reduces RF interference. It
increases the signal-to-noise ratio in wireless audio transmission to more than 110 dB.
HDX is a wideband compander system which compresses the audio signal in the transmitter in a 2:1 ratio (related
to dB) to lift it above the inherent noise floor of the RF link. A 110 dB dynamic range signal is thus transmitted with
an effective dynamic range of only 55 dB, which is above the 60 dB noise floor of the RF link. In the receiver, the
signal is expanded in an identical and opposite way in a 1:2 ratio to restore the original signal, at the same time
reducing the RF noise to below the noise floor of the receiver.
HDX has been specially developed for high quality radio-microphone systems.
NOTE: only transmitters and receivers that are equipped with HDX can work correctly with each other. If non
HDX equipment was mixed with HDX, the dynamic range would be drastically reduced and the transmission
would be sound blunt and flat. HDX is permanently active and cannot be switched off.
Wireless transmission systems
With the series, Sennheiser puts an end to cable tangles and enables complete freedom of movement. The
systems operate exclusively in the UHF band. UHF transmission is extremely reliable and is far less prone to
interference that the overcrowded VHF band – harmonics from the mains units, fluorescent tubes, refrigerators,
computers, etc are virtually eliminated. Also indoor propagation of UHF radio waves is better than VHF so that the
RF power can be kept low - this is also an advantage when using multi-channel systems. Finally UHF frequency
ranges are being approved all over the world for radio-microphone usage – in some country license-free.
Correct adjustment of transmitter sensitivity is vital. Too high and you get over-modulation and distortion, too low
and you get under-modulation and a noisy signal. Please set the sensitivity correctly for the microphone/usage
and check it before every performance to ensure best operation.
Squelch
Pilot tone squelch
The transmitter adds a pilot tone to the audio signal. The receiver checks incoming audio signals to see if the pilot
tone is present. In the absence of the signal, the receiver's audio output will remain muted, even if a strong RF
signal is present.
This prevents strong interfering signals from causing hissing noise in the receiver when the transmitter is switched
off.
In order to benefit from this feature, the pilot tone function must be activated on both the transmitter and receiver.
The pilot tone function is factory-preset to “ON” (= activated).
Field strength-dependent squelch
depending on the strength of the received RF signal, the receiver's audio output is opened or muted. Via the
“SQELCH” menu of the receiver, the squelch threshold can be adjusted in three steps (LO, MID, HI).
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