TOA | TS-920RC 1CE/3CU/4CE/-CN | manual | TOA TS-920RC 1CE/3CU/4CE/-CN User manual

TOA TS-920RC 1CE/3CU/4CE/-CN User manual
INSTRUCTION MANUAL
CONFERENCE SYSTEM
TS-920 SERIES
Infrared transmitter/receiver
Infrared delegate unit
Infrared chairman unit
Central unit
Thank you for purchasing TOA's Conference system.
Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.
TABLE OF CONTENTS
1. SAFETY PRECAUTIONS .............................................................................. 4
2. GENERAL DESCRIPTION ........................................................................... 7
3. FEATURES ............................................................................................................. 7
4. SYSTEM EQUIPMENT CONFIGURATION ........................................ 8
5. NOMENCLATURE AND FUNCTIONS .................................................. 9
5.1. Central Unit TS-920RC .......................................................................................... 9
5.2. Infrared Chairman Units TS-921 and TS-821 ..................................................... 14
5.3. Infrared Delegate Units TS-922 and TS-822 ...................................................... 17
6. SYSTEM CONNECTION EXAMPLES ................................................. 20
7. INFRARED TRANSMITTER/RECEIVER INSTALLATION
AND CONNECTIONS .................................................................................... 21
7.1.
7.2.
7.3.
7.4.
7.5.
7.6.
Notes on Installation of the Infrared Transmitter/Receiver Unit ...........................
Infrared Service Areas ........................................................................................
Infrared Transmitter/Receiver Arrangement Examples .......................................
Wiring between the Infrared Transmitter/Receiver Unit and the Central Unit .....
Mounting the Infrared Transmitter/Receiver Unit .................................................
Connections between the Infrared Transmitter/Receiver Unit
and the Central Unit .............................................................................................
21
22
24
25
27
29
8. USING WIRED MICROPHONES AND
SOUND SOURCE EQUIPMENT ............................................................. 33
8.1. Wired Microphone Use ........................................................................................ 33
8.2. Sound Source Equipment Use ............................................................................ 33
9. RECORDING EQUIPMENT CONNECTION .................................... 34
10. CONFERENCE UNIT INSTALLATION AND SETTINGS ...... 34
11. INFRARED CONFERENCE UNIT POWER SUPPLY ............... 36
11.1. BP-900A Lithium-Ion Battery ............................................................................. 36
11.2. AD-0910 AC Adapter ......................................................................................... 38
12. MOUNTING THE CENTRAL UNIT ON A RACK ....................... 39
13. INSTALLATION STATUS CONFIRMATION .................................. 40
14. FUNCTION SETTINGS .............................................................................. 41
14.1. Setting the Maximum Number of Open Microphones ....................................... 41
14.2. Speech Priority Settings .................................................................................... 41
14.3. Mic-Off Function ................................................................................................ 42
15. MICROPHONE MIX/CUT SWITCH SETTINGS .......................... 43
16. OPERATION ..................................................................................................... 44
16.1. Initiating Speech ................................................................................................ 44
2
16.2. Initiating Priority Speech (TS-921 and TS-821 only) ........................................ 45
16.3. Voting (TS-921 and TS-922 only) ..................................................................... 47
16.4. Using the Recording Function ........................................................................... 48
17. IF ACOUSTIC FEEDBACK OCCURS ............................................... 54
17.1. Using the Built-in FBS Function ......................................................................... 54
17.2. Using an External Graphic Equalizer ................................................................. 54
18. IF A FAILURE IS DETECTED ................................................................ 55
18.1. Infrared Chairman Unit TS-921/821 and
Infrared Delegate Unit TS-922/822 .................................................................... 55
18.2. Central Unit TS-920RC ..................................................................................... 57
18.3. Battery Charger BC-900 ................................................................................... 57
19. APPENDIX (INFRARED TRANSMITTER/RECEIVER
CONNECTION) ............................................................................................... 58
19.1. Wiring Design .................................................................................................... 58
19.2. Design Examples .............................................................................................. 60
20. SIGNAL FLOW DIAGRAM
INSIDE THE CENTRAL UNIT ................................................................ 66
21. SPECIFICATIONS ......................................................................................... 67
21.1. Central Unit TS-920RC ...................................................................................... 67
21.2. Infrared Chairman Unit TS-921, Infrared Delegate Unit TS-922 ...................... 68
21.3. Infrared Chairman Unit TS-821, Infrared Delegate Unit TS-822 ...................... 69
21.4. Microphone (standard) TS-923, Microphone (long) TS-924 ............................. 70
21.5. Infrared Transmitter/Receiver TS-905, TS-907 ................................................. 70
21.6. Lithium-Ion Battery BP-900A ............................................................................. 71
21.7. Battery Charger BC-900 .................................................................................... 71
21.8. AC Adapter AD-0910 ......................................................................................... 71
21.9. Distributor YW-1022 (2-branch distributor), YW-1024 (4-branch distributor) ..... 72
21.10. Rack Mounting Bracket MB-TS920 .................................................................. 72
3
1. SAFETY PRECAUTIONS
• Before installation or use, be sure to carefully read all the instructions in this section for correct and safe
operation.
• Be sure to follow all the precautionary instructions in this section, which contain important warnings and/or
cautions regarding safety.
• After reading, keep this manual handy for future reference.
Safety Symbol and Message Conventions
Safety symbols and messages described below are used in this manual to prevent bodily injury and property
damage which could result from mishandling. Before operating your product, read this manual first and
understand the safety symbols and messages so you are thoroughly aware of the potential safety hazards.
DANGER
Indicates an imminently hazardous situation, which, if not avoided,will
result in death or serious injury.
When the Unit is in Use
Applicable to Lithium-ion battery
• Should the following irregularity be found during use, immediately switch off the power, take the batteries out
of the unit, and keep them away from fire. Failure to do so may cause a fire or explosion.
· If you find battery leakage, discoloration, deformation or damage.
· If you detect smoke or a strange smell coming out from the batteries.
• Do not deform, modify, nor solder the batteries. Doing so may damage the battery's safety or protector
mechanism, causing the batteries to fire, leak, or explode.
• Never short the positive and negative terminals with a wire or other metallic objects. Also, avoid carrying or
keeping the batteries with metallic objects such as necklaces or hair pins. Doing so may cause the batteries
to fire, explode, leak, or heat.
• Never heat the batteries nor throw them into a fire. Doing so may damage the battery's gas relief valve or
safety mechanism, causing the batteries to fire or explode.
• Do not dip the batteries into water nor wet the battery terminals. This may corrode the batteries, possibly
causing them to fire, explode, leak, or heat.
• Note correct polarity (positive and negative orientation) when inserting the batteries into a battery charger.
Doing otherwise may cause them to fire, explode, leak, or heat.
• Do not use, keep, nor leave the batteries near fire or in locations where the temperature rises above 60°C
such as in a sun-heated car. Doing so may damage the battery's safety or protector mechanism, causing the
batteries to fire, explode, leak, or heat.
• Be sure to use the BC-900 Battery charger when recharging the batteries. Using other battery charger may
cause them to fire, explode, leak, or heat.
• Use the batteries only with the equipment specified. Failure to do so may cause the batteries to fire, explode,
leak, or heat.
• Do not drop the batteries nor give them a shock. Doing so may damage the battery's safety or protector
mechanism, causing the batteries to fire, explode, leak, or heat.
• There is a fear of loosing one's eyesight if a battery leakage gets in one's eyes. Wash it away with clean water
and consult a doctor immediately. If a battery leakage stains one's skin or clothes, wash it away with clean
water as there is a fear of impairing the skin.
WARNING
Indicates a potentially hazardous situation which, if mishandled, could
result in death or serious personal injury.
When Installing the Unit
Applicable to Central unit, Conference unit, Battery charger, and AC adapter
4
• Use the unit only with the voltage specified on the unit. Using a voltage higher than that which is specified
may result in fire or electric shock.
• Do not cut, kink, otherwise damage nor modify the power supply cord. In addition, avoid using the power cord
in close proximity to heaters, and never place heavy objects -- including the unit itself -- on the power cord,
as doing so may result in fire or electric shock.
• Do not expose the unit to rain or an environment where it may be splashed by water or other liquids, as doing
so may result in fire or electric shock.
• Avoid installing or mounting the unit in unstable locations, such as on a rickety table or a slanted surface.
Doing so may result in the unit falling down and causing personal injury and/or property damage.
When the Unit is in Use
Applicable to Central unit, Conference unit, Battery charger, and AC adapter
• Should the following irregularity be found during use, immediately switch off the power, disconnect the power
supply plug from the AC outlet and contact your nearest TOA dealer. Make no further attempt to operate the
unit in this condition as this may cause fire or electric shock.
· If you detect smoke or a strange smell coming from the unit.
· If water or any metallic object gets into the unit
· If the unit falls, or the unit case breaks
· If the power supply cord is damaged (exposure of the core, disconnection, etc.)
· If it is malfunctioning (no tone sounds.)
• To prevent a fire or electric shock, never open nor remove the unit case as there are high voltage components
inside the unit. Refer all servicing to your nearest TOA dealer.
• Do not place cups, bowls, or other containers of liquid or metallic objects on top of the unit. If they accidentally
spill into the unit, this may cause a fire or electric shock.
• Do not insert nor drop metallic objects or flammable materials inside the unit, as this may result in fire or
electric shock.
• Do not touch a plug during thunder and lightning, as this may result in electric shock.
Applicable to Battery charger and Lithium-ion battery
• Stop charging if the batteries are not fully charged within 5 hours.
Continuously charging over 5 hours may cause the batteries to fire, explode, leak, or heat.
Applicable to Central unit and Conference unit
• To prevent possible hearing damage, do not listen at high volume levels for long periods.
CAUTION
Indicates a potentially hazardous situation which, if mishandled, could
result in moderate or minor personal injury, and/or property damage.
When Installing the Unit
• These servicing instructions are for use by qualified personnel only.
To reduce the risk of electric shock, do not perform any servicing other than that contained in the operating
instructions unless you are qualified to do so. Refer all servicing to qualified service personnel.
Applicable to Central unit
• Be sure to follow the instructions below when rack-mounting the unit. Failure to do so may cause a fire or
personal injury.
· Install the equipment rack on a stable, hard floor. Fix it with anchor bolts or take other arrangements to
prevent it from falling down.
· When connecting the unit's power cord to an AC outlet, use the AC outlet with current capacity allowable to
the unit.
· The rack-mounting screws supplied with the rack mounting bracket can be used for the TOA equipment rack
only. Do not use them for other racks.
5
Applicable to Central unit, Conference unit, Battery charger, and AC adapter
• Never plug in nor remove the power supply plug with wet hands, as doing so may cause electric shock.
• When unplugging the power supply cord, be sure to grasp the power supply plug; never pull on the cord itself.
Operating the unit with a damaged power supply cord may cause a fire or electric shock.
• When moving the unit, be sure to remove its power supply cord from the wall outlet. Moving the unit with the
power cord connected to the outlet may cause damage to the power cord, resulting in fire or electric shock.
When removing the power cord, be sure to hold its plug to pull.
• Avoid installing the unit in humid or dusty locations, in locations exposed to the direct sunlight, near the heaters,
or in locations generating sooty smoke or steam as doing otherwise may result in fire or electric shock.
When the Unit is in Use
Applicable to Central unit, Conference unit, Battery charger, and AC adapter
• Do not place heavy objects on the unit as this may cause it to fall or break which may result in personal injury
and/or property damage. In addition, the object itself may fall off and cause injury and/or damage.
• If dust accumulates on the power supply plug or in the wall AC outlet, a fire may result. Clean it periodically.
In addition, insert the plug in the wall outlet securely.
• Switch off the power, and unplug the power supply plug from the AC outlet for safety purposes when cleaning
or leaving the unit unused for 10 days or more. Doing otherwise may cause a fire or electric shock.
Applicable to Central unit, Conference unit, and Battery charger
• Use the dedicated AC adapter for the unit. Note that the use of other adapter may cause a fire.
Applicable to Central unit and Conference unit
• Make sure that the volume control is set to minimum position before power is switched on. Loud noise
produced at high volume when power is switched on can impair hearing.
Applicable to Conference unit
• When the unit is not in use for 10 days or more, be sure to take the battery out of the unit because battery
leakage may cause a fire, personal injury, or contamination of environment.
Applicable to Battery charger
• Remove the power supply plug of charger from the AC outlet after charging completion, as doing otherwise
may cause a fire.
Applicable to Lithium-ion battery
• When you discard batteries, please contact the local dealer from whom you bought.
Applicable to Central unit, Conference unit, and Battery charger
This is a class A product.
In a domestic environment this product may cause radio interference in which case the user may be
required to take adequate measures.
CAUTION: Risk of explosion if the battery is replaced by an incorrect type.
This conference system is not suitable for use in locations where children are likely to be present.
6
2. GENERAL DESCRIPTION
The TOA TS-920 Series conference system employs its infrared wireless system unit.
The Infrared chairman and Delegate units (collectively referred to as "Conference units") provide wireless
communication via the Infrared transmitter/receiver unit connected to the Central unit. Since wiring to the
individual Conference units is not required, they can be easily installed in freely versatile configurations.
A total of up to 192 Infrared conference units can be connected to the Central unit of each system.
The Infrared transmitter/receiver unit is required for connection of the Infrared conference units. (Refer to
p. 21.)
The Central unit is used to perform system function settings, status display, etc.
3. FEATURES
• The number of Conference units to be used can be freely selected depending on the number of participants.
A total of up to 192 Conference units can be installed in a single system.
• Open Microphones Number Setting function supports well-organized meeting, avoiding the confusion that
can result from too many speakers trying to talk simultaneously.
• A Speech Priority Selector function permits selection of operating priority (first-in-first-out or last-in-first-out)
when the Speech key is pressed.
• If any microphones are not manually turned off after speaking, the system’s Mic-Off function automatically
switches them off if not in use for approximately 30 seconds.
• A built-in Feedback Suppression Function (FBS) ensures more efficient reduction of acoustic feedback*.
When Conference units are in use, their monitor speakers are automatically turned off, eliminating concerns
about acoustic feedback.
• Depending on installation requirements, wired microphones, music playing equipment and other devices can
be freely combined and used within the system.
• The Central unit has a recording function that allows it to save recorded files to either a portable USB memory
device or its own internal memory. An external recording device can also be connected, making it ideal for
recording the minutes of a conference.
* Acoustic feedback: The squeal or howl of a sound loop created when speaker output is picked up by a
microphone, amplified by an amplifier and further output from the speaker again.
[Conference unit]
• Equipped with Voting and base/translation language selection functions. (TS-921 and TS-922 only)
• Features a selection of both Chairman and Delegate units.
• Chairman units feature a Priority Speech Key Operation function that allows the Chairman unit to take speech
priority over the Delegate units with the simple press of a button.
• Conference unit microphones are attached via XLR connectors that permit easy detachment for more spacesaving convenience in storage.
• Two types of Conference unit microphones are made available and freely interchangeable: Standard type
and Long type.
• Infrared signal communication eliminates worries about radio interference and eavesdropping, making it
possible to use the system simultaneously in adjacent rooms.
• Units can be powered by either line AC or rechargeable lithium-ion batteries.
• Up to 16 TS-905 Infrared Transmitter/Receiver units, or up to 12 TS-907 units can be installed in a single
system. (If both models are combined in the same system, a total of up to 12 units can be installed.)
7
4. SYSTEM EQUIPMENT CONFIGURATION
Distributor
YW-1024 (4-branch distributor)
or
YW-1022 (2-branch distributor)
Infrared Transmitter/
Receiver
TS-905 or TS-907
Infrared Transmitter/Receiver
TS-905 or TS-907
Microphone (standard) TS-923
or
Microphone (long) TS-924
Central unit
TS-920RC
Infrared Chairman unit TS-921/821
Infrared Delegate unit TS-922/822
Lithium-Ion Battery BP-900A
(for TS-921/922/821/822)
AC Adapter AD-0910RC
(for TS-921/922/821/822)
Battery Charger
BC-900 (for BP-900A)
8
Rack Mounting Bracket
MB-TS920 (for TS-920RC)
5. NOMENCLATURE AND FUNCTIONS
5.1. Central Unit TS-920RC
[Top]
1
2
3
4
6
10 12
15
16
8 9 11 13 14
21 23 25 26
27
22 24
28
5 7
17
18
Internal of
rubber cap
19
20
Internal of
rubber cap
1. Power switch [POWER]
Setting this switch to the ON position causes the
Power indicator to light.
2. Access indicator (green) [ACCESS]
Continues to remain lit while recording to the
inserted USB memory device is in progress.
Note
Avoid removing the USB memory device or turning
off the Power switch (1) while this indicator is lit.
3. Data signal receiving indicator [DATA]
Lights when control data is received from the
Conference unit.
4. Audio signal receiving indicators
[MIC UNIT, CH1/CH2/CH3/CH4]
Light up when audio signals are received from
Conference units. Audio signals are transmitted
or received through 4 channels. The number of
channels to be used can be set with the Number
of open microphones setting switch (8). These
indicators light in the same number as that of the
Conference units currently being used for speech.
(Which indicator will light is not specified.)
29
30
31
32
33
34
35
5. Battery indicator [BATTERY]
Flashes when the lithium-ion battery of the Infrared
Conference unit nears complete discharge. (In this
event, the Microphone in-use indicator and the
Speech indicator on the corresponding unit also
flash.)
Note
Be sure to immediately replace the lithium-ion
battery of the corresponding unit with the fullycharged one if this indicator begins to flash.
6. External control priority indicator
[EXT, PRIORITY]
Either lights or flashes when a PC or operation
panel connected to the External Control terminal
(41) or (43) performs priority operation. In this
event, three function setting switches (8), (9), and
(10) cannot be used.
7. External control communication indicator
[EXT, DATA]
Remains lit during communications with a computer
(PC) or operation panel connected to the External
Control terminal (41) or (43).
9
8. Number of open microphones setting switch
[MAX MIC UNIT, 1/2/3/4]
Used to set the number of Conference units that
can be simultaneously operated. The indications
[1], [2], [3], and [4] represent the number of
simultaneously operable units.
(Refer to p. 41 "Setting the Maximum Number
of Open Microphones.")
Note
This switch is factory-preset to the [1] position.
9. Speech priority selector switch
[PRIORITY]
Determines the priority mode when the Talk key
of the Conference unit is pressed.
(Refer to p. 41 "Speech Priority Settings.")
FIRST
First-in-first-out priority
LATEST
Last-in-first-out priority
FIRST:FIXED Priority fixed for the first unit,
NEXT: LATEST and last-in-first-out priority for
all other subsequent units.
Note
This switch is factory-preset to the [FIRST]
position.
10. Mic-off setting switch [AUTO OFF]
Automatically turns off Conference unit
microphones 30 seconds after speech is
completed if the user should neglect to turn off the
microphone. (Refer to p. 42 "Mic-Off Function.")
Note
This switch is factory-preset to the OFF position.
11. MIC 1 input volume control [MAIN, MIC 1]
Adjusts the input level of the MIC 1 Input Terminal
(40) on the rear panel. Signals input to the MIC
1 terminal are output to the base language
channel*1.
12. Microphone Mix/Cut switch
(for the base language channel)
[MAIN, MIX/CUT]
MIX:
Speech input from the Conference units,
and AUX 1 and MIC 1 input signals are
output to the base language channel*1, and
recording and line outputs.
CUT:Speech input from the Conference units is
not output to the base language channel*1.
The AUX 1 and MIC 1 input signals are not
delivered to the recording and line outputs.
Note
This switch is factory-preset to the MIX position.
13. AUX 1 input volume control [MAIN, AUX 1]
Adjusts the input signal level of the AUX 1 Input
Terminal (39) located on the rear panel. Speech
input to the AUX 1 terminal is output to the base
language channel*1.
10
14. Microphone Mix/Cut switch
(for the translation language channel)
[SUB, MIX/CUT]
MIX:Speech input from the Conference units is
output to the translation language channel*2.
CUT:Speech input from the Conference units is not
output to the translation language channel*2.
Note
This switch is factory-preset to the MIX position.
15. AUX 2 input volume control [SUB, AUX 2]
Adjusts the input signal level of the AUX 2 Input
Terminal (37) located on the rear panel. Speech
input to the AUX 2 terminal is output to the
translation language channel*2.
16. MIC 2 input volume control [SUB, MIC 2]
Adjusts the input level of the MIC 2 Input Terminal
(38) on the rear panel. Signals input to the MIC
2 terminal are output to the translation language
channel*2.
17. AUX 3 input volume control
[MAIN+SUB, AUX 3]
Adjusts the input signal level of the AUX 3 Input
Terminal (36) located on the rear panel. Speech
input to the AUX 3 terminal is output to both
the base language*1 and translation language*2
channels.
18. Headphone channel selector switch
[MAIN/SUB/LINE]
Used to choose the output to be monitored by a
connected headphones from the following three
sources: Base language (MAIN), Translation
language (SUB), and Line (LINE) channels.
Note
This switch is factory-preset to the MAIN position.
19. USB memory port [MEMORY]
Insert a USB memory device (flash-drive/thumb
drive) into this port when recording to the USB
memory device.
Note
No recording can be made to the internal memory
while a USB memory device is inserted into this
port.
20. PC connection port (USB Mini-B) [PC]
Connect a PC to this port in order to move internal
memory sound source files or delete them.
Note
Recording cannot be performed while a PC
is connected to this port, nor can the internal
memory be formatted by the Central unit.
21. Internal memory status indicator (green/red)
[INTERNAL, STATUS]
Lights green when recordings can be made to the
internal memory, and flashes green while a PC is
connected to the PC connection port (20).
Flashes red when any irregularity is detected in
the internal memory.
22. Remaining internal memory capacity warning
indicator (orange) [INTERNAL, FULL]
Flashes when the remaining time available for
recording to the internal memory falls to less than
one hour, and stays lit when no time remains for
recording to the internal memory.
23. USB memory status indicator (green/red)
[USB, STATUS]
Lights green when recordings can be made to
the connected USB memory device, and flashes
red when any irregularity is detected in the USB
memory device.
24. Remaining USB memory capacity warning
indicator (orange) [USB, FULL]
Flashes when the remaining time available for
recording to the connected USB memory device
falls to less than one hour, and stays lit when no
time remains for recording to the USB memory
device.
30. Voting start/end button [START/END]
Holding this button down for 1 second or more
places the Central unit in Vote reception mode.
While in this mode, the unit can receive voting
inputs from connected individual conference
units. Vote reception mode can be terminated with
another depression of this button for 1 second or
more, causing the voting results to be displayed on
the Voting results monitor (31).
(Refer to p. 47 "Voting (TS-921 and TS-922
only)."
This button is also used to confirm installation
conditions for the Infrared transmitter/receiver unit,
the Conference unit.
(Refer to p. 40 "INSTALLATION STATUS
CONFIRMATION.")
31. Vote result monitor [VOTING]
Computes the number of votes cast by individual
Conference units for categories 1 – 3 and displays
the result after voting completion.
(Refer to p. 47 "Voting (TS-921 and TS-922
only)."
32. Speech volume control [MIC UNIT]
Adjusts the microphone volume of the Conference unit.
33. Headphone jack [ ]
Connects to headphones. (Mini-jack)
25. Recording stop button [STOP]
Press this button to stop recording.
34. Headphone volume control [HEADPHONES]
Adjusts the sound volume of the headphones.
26. Recording start button [REC]
Press this button to start recording.
35. FBS (Feedback Suppressor) switch
[FBS, AUTO/OFF/EXT]
Use to set FBS operation.
AUTO: Select to suppress acoustic feedback by
automatically searching for a frequency
generating acoustic feedback.
(Refer to p. 54 "Using the Built-in FBS
Function.")
OFF:Select when not using the FBS function.
EXT:
Select when using an external graphic
equalizer. (Refer to p. 54 "Using an
External Graphic Equalizer.")
Note
This switch is factory-preset to the OFF position.
27. Recording status indicator (red) [REC]
Lights during recording, and flashes while the
internal memory is being formatted.
28. Format button [HOLD 5 SEC]
Hold down this button for 5 seconds or more to
format the internal memory and delete all sound
source files.
29. Format in-progress indicator (red) [FORMAT]
Flashes while the internal memory is being
formatted.
*1 Base Language:Mixed audio signals from the AUX 1 input, MIC 1 input, and in-use Conference units.
*2 Translation Language:Mixed audio signals from the AUX 2 input, MIC 2 input, and in-use Conference units.
11
[Rear]
51 52
36
37
53
38
39
40
41
42 43 44 45 46
54
36. AUX 3 input terminal [AUX 3]
−20 dB*, 10 kΩ, unbalanced, phone jack.
Connect a CD player, tape recorder, or other
similar equipment to this terminal. Speech input
connected to this terminal is relayed to both the
base and translation language channels.
37. AUX 2 input terminal [AUX 2]
−20 dB*, 10 kΩ, unbalanced, phone jack.
Connect a CD player, tape recorder, or other
similar equipment to this terminal. Speech input
connected to this terminal is relayed to the
translation language channel.
38. MIC 2 input terminal [MIC 2]
−60 dB*, 600 Ω, unbalanced, phone jack.
Connect a wired microphone to this terminal.
Speech input from the microphone connected to
this terminal is relayed to the translation language
channel.
39. AUX 1 input terminal [AUX 1]
−20 dB*, 10 kΩ, unbalanced, phone jack.
Connect a CD player, tape recorder, or other
similar equipment to this terminal. Speech input
connected to this terminal is relayed to the base
language channel.
40. MIC 1 input terminal [MIC 1]
−60 dB*, 600 Ω, unbalanced, phone jack.
Connect a wired microphone to this terminal.
Speech input from the microphone connected
to this terminal is relayed to the base language
channel.
41. External control terminal [RS-232C]
Connect this terminal to the serial port of a
PC, operation panel, or other external control
equipment.
42. External control terminal selection switch
Used to select either RS-232C (41) or USB (43)
external control terminals.
12
47
48 49 50
55
43. External control terminal [USB]
Connects to the external control terminal of a
PC, operation panel or other connected external
equipment.
44. Level volume control [LINE OUT, LEVEL]
Adjusts the line output (45) volume.
45. Line output terminal [LINE OUT]
−10 dB*, 10 kΩ, unbalanced, phone jack.
Connect an amplifier, etc. for public address
applications. Speech input from the Conference
unit, or MIC 1, AUX 1, or AUX 3 terminals is output
to this terminal. The settings of Microphone Mix/
Cut switch (12) and AUX 3 Output Mix/Cut switch
(46) determine whether or not such speech input
is output.
46. AUX 3 output Mix/Cut switch
[LINE OUT, MIX/CUT, AUX 3]
Determines whether or not speech input is relayed
from AUX 3 terminal to the line output (45). Set
this switch to MIX in normal use, and to CUT to
enable conference participants in other rooms to
avoid potential audio feedback while speaking.
47. Recording output terminal [REC OUT]
−10 dB*, 10 kΩ, unbalanced, monaural, RCA jacks.
Connect an external recording unit. An amplifier
can also be connected for public address
applications. The same speech signal as the line
output and that of AUX 3 terminal are output to
this terminal.
48. Graphic equalizer input terminal
[EQUALIZER, IN]
−20 dB*, 10 kΩ, unbalanced, RCA jack.
Connect this terminal to the graphic equalizer’s
output terminal.
49. Graphic equalizer output terminal
[EQUALIZER, OUT]
−20 dB*, 10 kΩ, unbalanced, RCA jack.
Connect this terminal to the graphic equalizer’s
input terminal.
50. Priority chime volume control [CHIME]
Adjusts the output volume of the chime tone
that sounds when the Priority speech key on the
Chairman unit is pressed.
51. DC inlet
Connect the supplied AC adapter to this terminal.
52. Cable clip
Run the AC adapter cable through this clip to
prevent its plug from being removed from the DC
inlet.
Cable clip
To the DC inlet
AC adapter cable
53. Short circuit indicator [SHORT]
Lights when the Infrared transmitter/receiver unit
or its connected cable is shorted.
54. Infrared transmitter/receiver I/O terminals
[INFRARED TRANSMITTER/RECEIVER]
Connect the Infrared transmitter/receiver unit, or
Distributor to these terminals.
By using the YW-1022 (2-branch distributor) and/
or YW-1024 (4-branch distributor), the following
maximum number of Infrared transmitter/receiver
units can be connected: 16 units when they are
all TS-905 units, 12 units when they are all TS907 units. (Also 12 units when both models are
mixed.)
55. Functional ground terminal [SIGNAL GND]
Hum noise may be generated when external
equipment is connected to the unit. Connecting
this terminal to the functional ground terminal
of the external equipment may reduce the hum
noise.
Note
This terminal is not for protective earth.
* 0 dB = 1 V
13
5.2. Infrared Chairman Units TS-921 and TS-821
[TS-921 Top]
[TS-821 Top]
1
1
8
2
2
9
3
4
5
6 7 3
3
5
6 7 3
Note: No microphone is supplied with the TS-921/821.
1. Infrared emitter/detector
The device used to transmit and receive infrared
communication signals is built inside this panel.
Note
Never place any object that could block infrared
signal access to this part of the unit, as this would
prevent the unit from transmitting or receiving its
required infrared signal.
2. Monitor speaker
Speech signals from other Conference units and
other audio signals from the Central unit are output
from this speaker. (Refer to the table below.)
Model
Output signal
TS-921 Base language or Translation language
Note:
Switchable by the Monitor selector
switch (22).
TS-821 Base language
Use the right-side Monitor volume control (20) to
adjust the volume. No sound is output from the
speaker of the unit in use while speaking.
3. Speech indicator
Remains lit while the microphone is in use (during
speech). The indicator flashes when the unit is out
of the communications service area.
4. Voting keys (TS-921 only)
Use this key when starting and stopping the Vote
reception mode, and when holding a vote. The
voting status indicator is provided on each key.
5. Talk key
When this key is pressed, both the Microphone inuse indicator (9) and the Speech indicator (3) light,
and the microphone turns on. Pressing this key
again turns off both indicators and the microphone.
14
6. Priority speech key
Gives speaking priority to the current speaker.
When this key is used for speech, no other delegate
units can be used. Also, only the current speech
made with the Priority speech key is output at the
Central unit’s recording and line outputs.
The key has 2 different operating modes, PTT and
ALT, which can be selected with the Priority speech
key operation setting switch (17).
• When PTT mode is selected, the microphone
only turns on while the key is pressed, during
which time the Speech (3) and Microphone inuse (9) indicators remain lit.
• When ALT mode is selected, pressing the key
turns on the microphone and causes the Speech
(3) and Microphone in-use (9) indicators to light.
Pressing the key again turns off the microphone
and these indicators.
If Chime is set to sound, a chime tone sounds when
the key is pressed. For the chime setting, use the
Priority chime mute switch (15).
7. Power indicator [POWER]
Lights when the power is switched ON.
This indicator also flashes when the battery level
is low or the unit is outside the communications
service area.
8. Microphone
Use either the TS-923 (Standard) or TS-924 (Long)
dedicated microphone.
9. Microphone in-use indicator
Lights when the microphone is turned on (for
speech) and flashes when the battery level is low.
[Rear]
10. DC inlet
Connect the dedicated AD-0910 AC Adapter to this terminal.
11. Power switch
Press this switch to switch on the power.
To switch off the power, press this switch again.
10
11
[Bottom]
Remove the cover on the bottom side of the unit to expose its setting switches.
12
Note
The figure below shows the setting switch labels for both models.
13
[TS-921 setting switch label]
14
15
16
17
18
[TS-821 setting switch label]
15
14
17
18
19
Cover of setting switches
12. Lithium-ion battery compartment
Install only a dedicated BP-900A Lithium-Ion
Battery in this compartment.
13. Release key
Press this key to remove the lithium-ion battery.
14. Priority operation setting switch
Following completion of a priority speech, this
switch is used to reset the operating status
of Conference units whose operations were
interrupted by the depression of a Priority speech
key (6).
Set the switch to RESTORE in order to resume
the mode in operation prior to initiation of the
priority speech, and to RESET when resumption
is not desired.
Note
This switch is factory-preset to the RESET
position.
15. Priority chime mute switch
Disables the chime that sounds when the Priority
speech key is pressed.
Set this switch to OFF when sound output is
desired, and to ON when no sound is desired.
Note
This switch is factory-preset to the OFF position.
16. Voting activation switch (TS-921 only)
Sets whether the Vote reception mode can be
started and stopped by the Chairman unit.
Set the switch to ON to enable voting, or to OFF
to disable voting.
Note
This switch is factory-preset to the OFF position.
17. Priority speech key operation setting switch
Use to set the Priority speech key operation
mode.
PTT:
Speech only possible while the Priority
speech key is being pressed.
ALT:Speech enabled when the Priority speech
key is pressed, and disabled when the key
is pressed again.
Note
The switch is factory-preset to PTT.
18. Unit address number setting switch
Set the unit address number (001 – 192), taking
care to ensure that the same number is not
duplicated in the system.
If the number [000] is assigned to a unit, the user
of that unit cannot speak. However, the unit can
be used for monitoring.
Set a numeral for the ones place and tens place.
Set this switch to OFF to set the hundreds place
to "0" and to ON to set it to "1."
Note
This number is factory-preset to [000].
19. Rating nameplate
15
[Right side]
20. Monitor volume control
Adjusts the output volume of the monitor speaker
and right-side headphone output.
21. Headphone jack
Connect headphones to this jack (mini-jack).
Connecting the headphone cuts off the output
from the monitor speaker. (Refer to the table
below.)
Model
Output signal
TS-921 Base language or Translation language
Note:
Switchable by the Monitor selector
switch (22).
TS-821 Base language
MAIN / SUB
20
21
22
Note
A headphone jack is located on both the left and
right side panels.
MAIN/SUB
22. Monitor selector switch (TS-921 only)
Selects either Base language or Translation
language for the source to be output to the monitor
speaker and headphones.
[Left side]
23. Headphone volume control
Adjusts the output volume of the left-side
headphone output.
21
16
23
5.3. Infrared Delegate Units TS-922 and TS-822
[TS-922 Top]
[TS-822 Top]
1
1
7
2
2
8
3
5
4
6 3
3
5
6 3
Note: No microphone is supplied with the TS-922/822.
1. Infrared emitter/detector
The device used to transmit and receive infrared
communication signals is built inside this panel.
Note
Never place any object that could block infrared
signal access to this part of the unit, as this would
prevent the unit from transmitting or receiving its
required infrared signal.
2. Monitor speaker
Speech signals from other Conference units and
other audio signals from the Central unit are output
from this speaker. (Refer to the table below.)
Model
Output signal
TS-922 Base language or Translation language
Note:
Switchable by the Monitor selector
switch (17).
TS-822 Base language
Use the right-side Monitor volume control (15) to
adjust the volume. No sound is output from the
speaker of the unit in use while speaking.
3. Microphone in-use indicator
Lights when the microphone is turned on (for
speech) and flashes when the battery level is low.
4. Voting keys (TS-922 only)
Use these keys to start, end, and cast voting. The
voting status indicator is provided on each key.
(Refer to p. 47 "Voting (TS-921 and TS-922 only)."
5. Talk key
When this key is pressed, both the Microphone inuse indicator (3) and the Speech indicator (8) light,
and the microphone turns on. Pressing this key
again turns off both indicators and the microphone.
6. Power indicator
Lights when the power is switched ON.
This indicator also flashes when the battery level
is low or the unit is outside the communications
service area.
7. Microphone
Use either the TS-923 (Standard) or TS-924 (Long)
dedicated microphone.
8. Speech indicator
Remains lit while the microphone is in use (during
speech). The indicator flashes when the unit is out
of the communications service area.
[Rear]
9. DC inlet
Connect the dedicated AD-0910 AC Adapter to this terminal.
10. Power switch
Press this switch to switch on the power.
To switch off the power, press this switch again.
9
10
17
[Bottom]
Remove the cover on the bottom side of the unit to expose its setting switches.
11
12
Note
The label describing the setting
switches is shown
in the following figure.
13
14
Cover of the setting switches
11. Lithium-ion battery compartment
Install only a dedicated BP-900A Lithium-Ion
Battery in this compartment.
12. Release key
Press this key to remove the lithium ion battery.
13. Unit address number setting switch
Set the unit address number (001 – 192), taking
care to ensure that the same number is not
duplicated in the system.
If the number [000] is assigned to a unit, the user
of that unit cannot speak. However, the unit can
be used for monitoring.
Set a numeral for the ones place and tens place.
Set this switch to OFF to set the hundreds place
to "0" and to ON to set it to "1."
Note
This number is factory-preset to [000].
18
14. Rating nameplate
[Right side]
15. Monitor volume control
Adjusts the output volume of the monitor speaker
and right-side headphone output.
16. Headphone jack
Connect headphones to this jack (mini-jack).
Connecting the headphone cuts off the output
from the monitor speaker. (Refer to the table
below.)
Model
TS-922
MAIN / SUB
15
16
TS-822
17
Output signal
Base language or Translation language
Note:Switchable by the Monitor selector
switch (17).
Base language
Note
A headphone jack is located on both the left and
right side panels.
MAIN/SUB
17. Monitor selector switch (TS-922 only)
Selects either Base language or Translation
language for the source to be output to the monitor
speaker and headphone.
[Left side]
18. Headphone volume control
Adjusts the output volume of the left-side
headphone output.
16
18
19
6. SYSTEM CONNECTION EXAMPLES
For base language
PC
Amplifier
CD
For translation language
Speaker
Recording unit
GEQ
CD
Graphic equalizer
For base and
translation languages
CD
External equipment connections
Central unit
TS-920RC
Infrared unit connections
Infrared transmitter/receiver
TS-905/907
AC adapter
(supplied with
the TS-920RC)
Power cord
(supplied with
the TS-920RC)
20
Distributor
YW-1024
Infrared Chairman units TS-921 and TS-821
Infrared Delegate units TS-922 and TS-822
7. INFRARED TRANSMITTER/RECEIVER INSTALLATION AND CONNECTIONS
7.1. Notes on Installation of the Infrared Transmitter/Receiver Unit
Installing the Infrared transmitter/receiver unit in locations exposed to sunlight or in proximity to such infrared
sources as fluorescent lights could result in system failures or the introduction of noise into the system. Avoid
installing the Infrared transmitter/receiver unit in close proximity to infrared sources, as instructed below:
[Avoid direct sunlight]
• Cover windows with curtains or blinds to shield
the unit from direct exposure to sunlight.
• Install the unit at lease 2 – 3 meters away from
the nearest window.
Sunlight
2–3m
[Keep away from fluorescent lights]
Position the unit at least 50 cm away from fluorescent lights.
Ceiling
Fluorescent lights
50 cm or more
50 cm or more
[Keep away other infrared light sources]
• Lighting equipment
• LCD projectors, overhead projectors, incandescent lamps, etc.
• Mercury-arc lamps
• Plasma displays
• Remote controllers, infrared microphones, infrared equipment such as infrared LANs.
• Dimmers
21
7.2. Infrared Service Areas
7.2.1. Infrared transmitter/receiver
[TS-905]
150°
Ceiling height
2.5 – 4.5 m
Radius of communication area
[TS-907]
90°
Ceiling height
5–7m
Radius of
communication area
Model
TS-905
Ceiling height
2.5 m
3.0 m
3.5 m
4.0 m
Radius of communication area
Approx. 7.0 m
Approx. 6.5 m
4.5 m
5.0 m
TS-907
5.5 m
6.0 m
Approx. 6.0 m
6.5 m
7.0 m
Notes
• Infrared signals cannot reach the Infrared Transmitter/Receiver unit if it is hidden behind the user or other
objects. Install multiple Transmitter/Receiver units in line-of-sight from all Conference units.
• Install the Infrared Transmitter/Receiver units in such a way that each Conference unit can always communicate
with two or more Transmitter/Receiver units. If installed in such a way that communication is only established
with one Transmitter/Receiver unit, the infrared signal may be blocked by persons or other objects, possibly
causing a momentary loss of signal reception.
22
7.2.2. Infrared conference unit
120°
MAIN/SUB
120°
15°
90°
15°
MAIN/SUB
The figure shows the TS-921.
23
7.3. Infrared Transmitter/Receiver Arrangement Examples
The area range that an Infrared transmitter/receiver unit covers differs depending on the height from the Infrared
conference units to the ceiling. (Refer to p. 22.)
Arrange the Infrared transmitter/receiver units so that all Infrared conference units are included in the service
area.
Note
The maximum number of Infrared transmitter/receiver units to be installed is 16 when they are all TS-905 units
and 12 when they are all TS-907 units. (Also 12 when both models are mixed.)
6m
6m
9m
Arranging the units at intervals as illustrated
permits the service area to cover every corner of
the room.
Note
Determine which to use TS-905 or TS-907
depending on the ceiling height.
Infrared transmitter/receiver
9m
[Conference room measuring 30 x 30 meters]
Communication area
that each unit covers
6m
All Infrared conference units are arranged
around the table, in which case only one
Infrared
transmitter/receiver
unit
may
suffice for complete coverage of conference
communications.
However, it is highly recommended that two or
more Transmitter/Receiver units be installed
in order to avoid accidental interruptions of
communications.
9m
Infrared transmitter/receiver
10 – 15 m
24
6m
Communication area
that the unit covers
10 – 15 m
[Conference room using round tables]
9m
7.4. Wiring between the Infrared Transmitter/Receiver Unit and the Central Unit
7.4.1. Notes on wiring
Infrared Transmitter/Receiver
Distributor
L
L
L
L
L
L
M0
M0
M1
N0
M1
N1
Central unit
When two or more Infrared transmitter/receiver units receive infrared signals from the Infrared conference
units, the signal reception level increases if input signals to each Transmitter/Receiver unit are in phase. If not
in phase, the signal reception level may decrease.
• To put signals in phase, ensure that the following cable length between two components are identical.
Length between each Infrared transmitter/receiver unit and the Central unit: L + M0 + N0 = M1 + N0 = N1
Note: This length must always be the same even if a distributor is included in the wiring.
Length between Infrared transmitter/receiver unit and distributor:
L
Length between distributors (where two distributors are connected): M0
Length between distributor and Central unit:
N0
(In the above figure, since there is only one N0 connection, the length need not be matched for the N0 line.)
• The maximum cable length between each Infrared Transmitter/Receiver unit and the Central unit differs
depending on the type of coaxial cable to be used. (Refer to p. 58.)
Take care not to exceed the maximum cable length.
7.4.2. Using the distributor
• The YW-1022 is a 2-branch distributor, and the YW-1024 is a 4-branch distributor. In the case of the YW1024, its distribution terminals may become idle depending on the Infrared Transmitter/Receiver unit's wiring.
However, this presents no problem.
• Avoid connecting more than 2 distributors in series. Connecting 3 or more distributors increases highfrequency signal loss, and could result in system malfunction.
• It is possible to mix Infrared Transmitter/Receiver units not connected to any distributor, those connected to
1 distributor, and those connected to 2 distributors in the same system.
• To avoid an increase in loss, do not perform connections between distribution terminals.
Distributor block diagram
[YW-1022]
[YW-1024]
Distributor
Mixing
Distribution 1
Distribution 2
Loss of 4.5dB
Impossible
Mixing
Distributor
Loss of 8.5dB
Loss of 4.5dB
Distribution 1
Distribution 2
Distribution 3
Distribution 4
Impossible
Impossible
Impossible
Loss of 8.5dB
25
7.4.3. Wiring examples
(Example 1)
Infrared transmitter/receiver
N
N
N
N
All cables for "N" must be identical in length when the Infrared
transmitter/receiver unit and the Central unit are installed in the
same space.
Central unit
(Example 2)
Infrared transmitter/receiver
L
L
Distributor
L
L
L
L
L
L
M
M
L
L
When installing in the same space,
• All "L" cables must be identical in length.
• All "M" cables must be identical in length.
Note
To facilitate the unification of coaxial cables used in
different connections into the same length, it is highly
recommended that wiring from the Central unit to the
distributor mounted in a ceiling be performed with
a single cable. For other ceiling wiring, using pre-cut
coaxial cables of a slightly longer length will facilitate
making all connections the same length.
M
M
L
L
L
L
L
L
N
Central unit
(Example 3)
Conference room B
Conference room A
Infrared transmitter/receiver
L1
L1
L0
L0
L1
L1
M1
M0
M0
L0
L0
Distributor
N
Central unit
26
L0
L0
L0
L0
When installing in multiple rooms where the light is
shut off, coaxial cables used in different rooms need
not be matched to the same length.
• All L0 cables are the same length.
• All L1 cables are the same length.
• All M0 cables are the same length.
• L0 and L1 cables need not be the same, since they
are used in different rooms.
• M0 and M1 cables need not be the same length,
since they are used in different rooms.
Note
The above condition also applies to cases in which two
conference systems, both including the Conference
units, are apart from each other in the same room so
that communications cannot be made between the two
systems.
7.5. Mounting the Infrared Transmitter/Receiver Unit
7.5.1. Ceiling mounting
83.5 mm
ø68 5 mm
1
Coaxial cable
Mounting plate
(supplied with the TS-905/907)
2
3
Mounting screw
Tabs (3 places)
Notes
• The screws supplied with the TS-905 and TS907
are used for mounting it to the microphone stand.
(Refer to the next page.)
• Mounting screws for ceiling or wall are not supplied
with the unit. Prepare them separately.
Infrared transmitter/receiver
TS-905/907
Rotate to fix.
Step 1. Make a 68 mm diameter hole in the ceiling.
Step 2. Attach the supplied mounting plate to the ceiling panel.
Notes
• Since the distance between two mounting screw holes is 83.5 mm, the plate can also be mounted
over an electrical box.
• For open wiring, use of an electrical box is recommended.
• When attaching the plate to an electrical box, use an L-shaped BNC plug or L-shaped conversion
connector.
Step 3. After wiring completion, mount the Infrared Transmitter/Receiver unit to the mounting plate.
With the unit's tabs (3 places) aligned with each corresponding notch in the mounting plate, rotate the
Infrared Transmitter/Receiver unit clockwise till it stops and fits into place.
27
7.5.2. Mounting on a microphone stand
Anti-drop screws M3 x 6
(supplied with the TS-905/907)
4
Coaxial cable
Stand mounting frame
(supplied with the TS-905/907)
Infrared transmitter/receiver
TS-905/907
Tabs (3 places)
Rotate to fix.
Mounting plate
(supplied with the TS-905/907)
5
3
1
2
U 5/16 – NS 5/8
thread adapter
(supplied with
the TS-905*/907)
Microphone stand
(applicable thread size: U 5/16)
Mounting screws M3 x 6
(supplied with the TS-905/907)
Microphone stand
(applicable thread size: NS 5/8)
* Not supplied with the TS-905 CE version.
Step 1. Attach the supplied stand mounting frame to the microphone stand.
Applicable thread size is U 5/16.
When the stand's thread size is NS 5/8, mount the supplied thread adapter onto the microphone stand.
Step 2. Fix the supplied mounting plate to the stand mounting frame.
Use the two supplied M3 x 6 screws for mounting.
Step 3. Attach the Infrared Transmitter/Receiver unit to the mounting plate.
Align the unit's tabs (3 places) with the corresponding notches in the plate, and then rotate the unit
clockwise until it stops and fits into place.
Step 4. Mount an anti-drop screw to the mounting plate.
Note: The screw tip enters a hole in the unit and prevents its rotation.
Step 5. Perform wiring.
28
7.6. Connections between the Infrared Transmitter/Receiver Unit and the Central Unit
7.6.1. Connecting
Use the coaxial cable with a BNC connector to connect the Infrared transmitter/receiver unit to the Central unit.
Coaxial cable
Central unit TS-920RC (rear panel)
Infrared transmitter/receiver
TS-905/907
Live status indicator
Short circuit indicator
Notes
• It is recommended that the RG-59/U, RG-6/U, or RG-11/U coaxial cable be used.
• Since the Infrared transmitter/receiver unit is equipped with the Live status indicator, it is possible to confirm
whether or not the coaxial cable is correctly connected. (The indicator cannot be used for confirmation of the
unit's minimum operating voltage.)
When the indicator does not light, it can be considered that the coaxial cable is not connected or shorted.
• The Central unit has a Short circuit indicator on its rear panel and the Central unit's short circuit protection
circuit is common to all 4 BNC terminals. If this Short circuit indicator lights, locate the shorted point by
removing each distributed cord. The indicator also lights when the number of Infrared transmitter/receiver
units connected in the system exceeds the allowable limit.
29
7.6.2. Coaxial cable processing
Coaxial cable
RG-59/U
RG-6/U
RG-11/U
Applicable BNC plug
YA-641 (1 piece per package), CC-4900 (10 pieces per package),
and CC-4901 (10 pieces per package)
YA-641 (1 piece per package), CC-4900 (10 pieces per package)
YA-642 (1 piece per package)
Note: Purchase both the coaxial cable and the required BNC plugs separately.
Follow the procedure below to attach the BNC connector to the coaxial cable:
Attaching a YA-641 or CC-4901 BNC Plug to the RG-59/U Cable
Step 1. Strip the jacket 10 mm from the end of the coaxial cable.
Braided shield
10 mm
Tube
Step 2. Slip the tube supplied with the BNC plug over the jacket.
Step 3. Unravel the braided shield and turn it back, then peel away the
aluminum cladding.
Aluminum cladding
Dielectric
Step 4. Strip the dielectric 4 mm from the cable end.
Conductor
4 mm
Screw
Step 5. Disassemble the BNC plug as shown in the figure at right and turn
the screw on the plug so that it loosens partially but remains in
position.
Clamping
fixture
Plug
Step 6. Insert the coaxial cable into the clamping fixture.
Clamping
fixture
Screw
Step 7. Insert the clamping fixture assembly into the plug.
Step 8. Tighten the screw and then clamp the plug by tightening the
clamping fixture.
Plug
Screw
Clamping
fixture
Plug
(Finished)
Attaching a CC-4900 BNC Plug to the RG-59/U Cable
Step 1. Strip the jacket 10 mm from the end of the coaxial cable.
Braided shield
10 mm
Tube
Step 2. Slip the tube supplied with the BNC plug over the jacket.
Step 3. Unravel the braided shield and turn it back, then peel away the
aluminum cladding.
Step 4. Strip the dielectric 4 mm from the cable end.
Aluminum cladding
Dielectric Conductor
4 mm
Step 5. Disassemble the BNC plug as shown in the figure at right.
30
Clamping
fixture
Plug
BNC connector
Step 6. Insert the coaxial cable into the clamping fixture.
Step 7. Insert the clamping fixture assembly into the plug and then solder
the conductor.
Clamping fixture
Conductor
Solder.
Step 8. Insert the plug into the BNC connector.
BNC connector
Step 9. Clamp the connector by tightening the clamping fixture.
Clamping
fixture
BNC connector
(Finished)
Attaching a YA-641 BNC Plug to the RG-6/U Cable
Braided shield
Step 1. Strip the jacket 10 mm from the end of the coaxial cable.
10 mm
Step 2. Unravel the braided shield and turn it back, then peel away the
aluminum cladding.
Aluminum cladding
Dielectric Conductor
Step 3. Strip the dielectric 4 mm from the cable end.
4 mm
Screw
Step 4. Disassemble the BNC plug as shown in the figure at right and turn
the screw on the plug so that it loosens partially but remains in
position.
Clamping
fixture
Plug
Step 5. Insert the coaxial cable into the clamping fixture.
Clamping fixture
Step 6. Insert the clamping fixture assembly into the plug.
Step 7. Tighten the screw and then clamp the plug by tightening the
clamping fixture.
Plug
Screw
Clamping Plug
fixture
(Finished)
Attaching a CC-4900 BNC Plug to the RG-6/U Cable
Step 1. Strip the jacket 10 mm from the end of the coaxial cable.
Step 2. Unravel the braided shield and turn it back, then peel away the
aluminum cladding.
Step 3. Strip the dielectric 4 mm from the cable end.
Braided shield
10 mm
Dielectric
Aluminum cladding
Conductor
4 mm
31
Step 4. Disassemble the BNC plug as shown in the figure at right.
Clamping
fixture
BNC connector
Plug
Step 5. Insert the coaxial cable into the clamping fixture.
Step 6. Insert the clamping fixture assembly into the plug and then solder
the conductor.
Clamping fixture
Conductor
Solder.
Step 7. Insert the plug into the BNC connector.
BNC connector
Step 8. Clamp the connector by tightening the clamping fixture.
Clamping
fixture
BNC connector
(Finished)
Attaching a YA-642 BNC Plug to the RG-11/U Cable
Step 1. Disassemble the BNC plug as shown in the figure at right.
Clamping Open Clamping Plug
fixture
ring
ring
Step 2. Strip the jacket 15 mm from the end of the coaxial cable.
Braided shield
15 mm
Open ring
Step 3. Insert the coaxial cable into the open ring.
Aluminum cladding
Step 4. Unravel the braided shield and turn it back, then peel away
the aluminum cladding.
Dielectric Conductor
Step 5. Strip the dielectric 5 mm from the cable end.
5 mm
Step 6. Insert the coaxial cable into the clamping fixture.
Clamping fixture
Step 7. Attach the clamping ring to the plug.
Clamping ring
Plug
Step 8. Insert the clamping fixture assembly into the plug.
Step 9. Solder the conductor to the plug.
Clamping
fixture
Step 10. Clamp the plug by tightening the clamping fixture.
32
Solder.
(Finished)
8. USING WIRED MICROPHONES AND SOUND SOURCE EQUIPMENT
8.1. Wired Microphone Use
Connect a wired microphone to the Central unit's MIC input and adjust its volume with the corresponding MIC
input volume control.
MIC 1 or MIC 2 input volume control
Central unit TS-920RC
(Top panel)
Wired microphone
(Rear panel)
MIC 1 or MIC 2 input terminal
8.2. Sound Source Equipment Use
Connect sound source equipment to the Central unit's AUX input and adjust its volume with the corresponding
AUX input volume control.
AUX 1, AUX 2, or AUX 3 input volume control
Sound source
equipment
Central unit TS-920RC
(Top panel)
Line output
(Rear panel)
AUX 1, AUX 2, or AUX 3
input terminal
33
9. RECORDING EQUIPMENT CONNECTION
Connect the recorder's recording input terminal to the Central unit's recording output terminal. If the recorder
has its recording level control, adjust it to an appropriate recording level.
Tip: For operation of the recorder, refer to the instruction manual included with the recorder.
Central unit TS-920RC
(Rear panel)
Recording output (REC OUT, monaural)
Recorder
Tip
Connection when a RCA plug cable is used.
10. CONFERENCE UNIT INSTALLATION AND SETTINGS
Step 1. Use a screwdriver to set the Unit address number setting switch
located on the unit’s bottom side.
Set a numeral for the ones place and tens place.
As for the hundreds place, shift this switch to OFF for a numeral
"0" and to ON for "1."
Set the unit address number (001 – 192), taking care to ensure
that the same number is not duplicated in the system.
If the number [000] is assigned to a unit, the user of that unit
cannot speak. However, the unit can be used for monitoring.
Note
This number is factory-preset to [000].
Conference unit
(bottom side)
ON
(Inside of the cover)
Ones digit
Tens digit
Hundreds digit
The figure shows the TS-921.
Step 2. Mount the microphone to the Conference unit.
Microphone (standard) TS-923
or
Microphone (long) TS-924
Conference unit
The figure shows the TS-921.
34
Step 3. Set the Priority operation, Priority chime mute, Voting activation, and Priority speech key operation
functions using the DIP switch located on the Chairman unit’s bottom side.
Factory-preset
position
(1) Priority operation setting switch
RESET
(2) Priority chime mute setting switch
OFF
(3) Voting activation setting switch
OFF
(4) Priority speech key operation setting switch PTT
Setting switch
(4) Priority speech key operation setting switch
(3) Voting activation setting switch
(2) Priority chime mute setting switch
Chairman unit
(bottom side)
The figure shows
the TS-921.
(Inside the cover for TS-921) (Inside the cover for TS-821)
(1) Priority operation setting switch
Step 4. Turn on the same number of microphones on the Conference units as the maximum number of open
microphones set at the Central unit. Speaking into the microphone, adjust the Central unit's Speech
volume control to an appropriate level.
Step 5. Initiate speech from the microphones of all Conference units, and confirm that acoustic feedback is not
produced.
If feedback occurs, widen the distance between the Chairman unit and the Delegate unit or reduce the
output volume to prevent feedback.
When feedback still remains, use the FBS function built in the Central unit, or an external graphic
equalizer to suppress it. (Refer to p. 54 "IF ACOUSTIC FEEDBACK OCCURS.")
35
11. INFRARED CONFERENCE UNIT POWER SUPPLY
Use either the optional BP-900A Lithium-ion battery or the AD-0910 AC adapter for the power supply of the
Infrared conference units.
11.1. BP-900A Lithium-Ion Battery
Note
Before using the BP-900A battery, be sure to carefully read the instructions on its use described in the manual
enclosed with the BP-900A.
11.1.1. Inserting the lithium-ion battery
Lithium-ion battery BP-900A
Arrow
Chairman unit TS-921, TS-821
or
Delegate unit TS-922, TS-822
(bottom side)
2
Slide the battery in the direction
indicated by the arrow until it
stops and fits into place.
Release key
1
Align the battery slots (4 places) with
the corresponding tabs located on the
unit's underside, and insert the battery
into the battery compartment.
Lithium-ion battery compartment
Push the release key to remove the battery.
Note: A fully charged battery can be continuously used for about 10 hours.
36
11.1.2. Recharging
Use the BC-900 Battery charger to recharge the BP-900A Lithium-Ion battery.
3
BP-900A Lithium-ion battery
Power cord (supplied
with the BC-900)
Charging status indicator
(Red/green)
5
1
Power switch
AC adapter (supplied
with the BC-900)
4
Power input terminal
2
BC-900 Battery charger
Step 1. Connect the power cord to the supplied AC adapter.
Step 2. Connect the AC adapter to the Charger's power input terminal.
Step 3. Insert the AC plug into the AC wall outlet.
Step 4. Turn on the power switch.
The Power indicator lights green.
Step 5. Insert the battery fully into one of the Charger's battery receptacles with the battery oriented to the
proper direction.
Ensure that the Charging status indicator lights red. If it does not light, check to see if the battery is
correctly inserted.
Charging is completed within 5 hours and the Charging status indicator lights green.
WARNING
Stop charging if batteries are not fully charged within 5 hours.
Continuously charging over 5 hours may cause batteries to fire,explode,
leak, or heat.
CAUTION
Remove the power supply plug of charger from the AC outlet after
charging completion, as doing otherwise may cause a fire.
Note
Switching the Charger's power OFF and back ON again with fully-charged (charging completed) batteries
inserted will result in repeated recharge of the batteries. Battery life could deteriorate from this repetitive
charging.
37
11.2. AD-0910 AC Adapter
Connect the AD-0910 AC adapter to the DC inlet located on the rear side panel of the Infrared conference units.
TS-921/922/821/822
MAIN/SUB
DC inlet
Power cord
(supplied with the AD-0910)
38
AC adapter
AD-0910
12. MOUNTING THE CENTRAL UNIT ON A RACK
Step 1. Detach both side panels of the TS-920RC Central unit.
Removed screws are used in Step 2.
Side panel
Step 2. Attach the MB-TS920 Rack mounting bracket to both sides of the Central unit.
Use the screws removed in Step 1.
Step 3. Mount the Central unit equipped with the mounting brackets in the rack.
Use the rack mounting screws and fiber washers supplied with the rack mounting bracket.
2
Screws removed in Step 1 (6 screws)
3
Fiber washer (for M5)
(supplied with the MB-TS920)
Rack mounting screw 5 x 12
(supplied with the MB-TS920)
CAUTION
The rack mounting screws 5 x 12 supplied with the MB-TS920 can
be used for the TOA equipment rack only. Do not use them for other
racks.
39
13. INSTALLATION STATUS CONFIRMATION
Installation status for the Infrared transmitter/receiver unit and Conference units can be checked from the
Central unit. Switch on the power to the Conference units to confirm their installation status after completing
installation and connection.
Note
None of the unit's functions can be used while in installation status confirmation mode, except Priority Speech
initiated from the Chairman unit.
Step 1. Switch on the power to the Central unit
while holding down its Voting start/end
button.
The Central unit's Battery indicator
lights, placing the unit in installation
confirmation mode.
Battery indicator
Lights
(1) Each segment (1 – 3) of The Central
unit's voting result display shows [0]
and flashes.
Flashes
Voting result display
(2) When a connection check signal is output from the Central unit,
the Microphone in-use indicator on the Conference unit that has
received the signal flashes.
(3) An acknowledgement signal is transmitted from each Conference
unit.
(4) A response confirmation signal is output from the Central unit that
has received the acknowledgement signal, and the Microphone
in-use indicator on the Conference unit that has received the
signal changes from flashing to steady ON.
(5) Each segment (1 – 3) of the Voting result display
provides a flashing indication of [the number of
installed Chairman units], [the number of installed
Delegate units], and [the total number of installed
Chairman and Delegate units], respectively.
Flashes
Number of installed
Chairman units
Total number of installed
Chairman and Delegate units
Number of installed Delegate units
Step 2. Press the Voting start/end button for
1 second or more after confirming the
indication.
The Central unit's Battery indicator and
Voting result display (1 – 3) turn off. The
Microphone in-use indicators on the
Conference units also go out, and the
installation status confirmation mode
is terminated, returning the system to
normal operation mode.
40
Lights
Turns off
Turns off
14. FUNCTION SETTINGS
14.1. Setting the Maximum Number of Open Microphones
Using the Number of open microphones setting switch on the
Central unit, set the maximum number of conference units that
can be simultaneously activated.
Set the switch to [1], [2], [3], or [4] depending on the type of the
conference. These numbers indicate the number of units that
can be simultaneously activated. (This switch is factory-preset
to the [1] position.)
Note
When the Talk key is pressed at a unit exceeding the set maximum
number, how the corresponding unit operates can be determined
in the speech priority settings referred to in the next section.
Number of open microphones
setting switch
14.2. Speech Priority Settings
Operation following the depression of the Talk key on a
Conference unit, when the maximum number of speakers that can
be simultaneously initiated is reached, can be selected with the
Speech Priority Selector switch on the TS-920RC Central unit.
14.2.1. First-in/first-out priority
(FIRST, factory-preset switch position)
Speech is initiated on a first-come/first-served basis. When the
maximum number of speakers is reached, subsequent speech
requests cannot be accepted, even if the Talk key is pressed.
Speech priority selector switch
• Example when the number of open microphones is set to [2].
Conference unit
[First unit]
[Second unit]
[Third unit]
Press the talk key.
Press the talk key.
Press the talk key.
First unit: Speech possible.
First unit:
Speech possible.
Second unit: Speech possible.
First unit:
Speech possible.
Second unit: Speech possible.
Third unit: Speech not possible.
14.2.2. Last-in/first-out priority (LATEST)
When the maximum number of simultaneous speakers is reached, input from the most recent subsequent Talk
key-pressed Conference unit takes precedence, thus rendering earlier speaking units inoperable.
• Example when the number of open microphones is set to [2].
Conference unit
[First unit]
[Second unit]
[Third unit]
Press the talk key.
Press the talk key.
Press the talk key.
First unit: Speech possible.
First unit:
Speech possible.
Second unit: Speech possible.
First unit:
Speech cancelled.
Second unit: Speech possible.
Third unit: Speech possible.
41
14.2.3. Priority fixed for first-enabled unit, and last-in/first-out priority for all subsequent units
(FIRST: FIXED, NEXT: LATEST)
The first-enabled Conference unit is given fixed speech priority until its Talk key is pressed again.
All subsequent Talk key-pressed units are given last-in/first-out priority, as in "LATEST."
• Example when the number of open microphones is set to [2].
Conference unit
[First unit]
[Second unit]
[Third unit]
[Fourth unit]
Press the talk key.
Press the talk key.
Press the talk key.
Press the talk key.
First unit: Speech possible.
First unit:
Speech possible.
Second unit: Speech possible.
First unit:
Speech possible.
Second unit: Speech cancelled.
Third unit: Speech possible.
First unit:
Speech possible.
Second unit: Speech cancelled.
Third unit: Speech cancelled.
Fourth unit: Speech possible.
14.3. Mic-Off Function
This function automatically turns off the microphone if the user neglects to turn it off following speech completion.
This function is enabled when the Mic-off setting switch on the
TS-920RC Central unit is set to the ON position.
The microphone automatically turns off if a duration of silence
lasts for about 30 seconds.
It is recommended that the Mic-off setting switch be set to the
OFF position when not specifically using this function. (The Micoff setting switch is factory-preset to the OFF position.)
Notes
• When the Mic-off setting switch is set to the ON position, the
microphone automatically turns off if there is a silent interval of
about 30 seconds, even though a speech may be in progress.
In conferences, where long pauses during speeches can be
experienced, set the switch to the OFF position.
• The Mic-Off function may not be operated correctly in highnoise areas.
42
Mic-off setting switch
15. MICROPHONE MIX/CUT SWITCH SETTINGS
Whether to output voice signals from Conference
units to the base or translation language channel
can be determined by setting the Microphone Mix/
Cut switch on the TS-920RC Central unit.
Outputs for individual inputs (MIC 1 – 2, and AUX
1 – 3) to the Central unit also change depending on
the switch setting.
For the base
language channel
For the translation
language channel
[Switch setting relationship of input to base/translation language channel]
• Speech output from Conference units depends on the switch setting. When the MAIN switch is set to the MIX
position, speech is output to the base language channel. When the SUB switch is set to the MIX position,
speech is output to the translation language channel.
• Inputs to the MIC 1 and AUX 1 terminals are output to the base language channel, except during priority
speech from the Chairman unit, regardless of the switch setting.
• Inputs to the MIC 2 and AUX 2 terminals are output to the translation language channel, except during priority
speech from the Chairman unit, regardless of the switch setting.
• Inputs to the AUX 3 terminal are always relayed to both the base and translation language channels regardless
of the switch setting.
[Input/output relationship to switch settings]
Output
Microphone Mix/Cut
switch
MAIN
Input
SUB
Monitor speaker on the Conference unit
Headphones* on the Central unit
Base language
Translation language
Central unit
Line output
Headphone*
Recording output
Conference unit
MIC 1
MIX
MIX
AUX 1
MIC 2
AUX 2
AUX 3
Conference unit
MIC 1
MIX
CUT
AUX 1
MIC 2
AUX 2
AUX 3
Conference unit
MIC 1
CUT
MIX
AUX 1
MIC 2
AUX 2
AUX 3
Conference unit
MIC 1
CUT
CUT
AUX 1
MIC 2
AUX 2
AUX 3
: Indicates that individual inputs are output.
: Indicates that individual inputs are not output.
: Indicates that output can be determined by the setting of the AUX 3 Output Mix/Cut switch (located on the TS-920's rear panel).
* Select output from MAIN (base language), SUB (translation language), and LINE (line output) sources using the Headphone
Channel Selector switch.
43
16. OPERATION
16.1. Initiating Speech
Step 1. Press the Talk key on the Conference
unit.
The Speech indicator and Microphone
in-use indicator light, placing the unit in
speech mode.
No sound is output from the monitor
speaker while both indicators are
continuously lit.
Note
The unit cannot be used for speech if the
indicators do not light.
Step 2. Speak into the microphone.
Step 3. Press the Talk key again after speech
completion.
The indicators go out, and sound can be
output from the monitor speaker.
Note
When the user forgets to turn off the
microphone, the Mic-Off function
automatically turns off the microphone
approximately 30 seconds after speech
completion. (Refer to p. 42.)
44
Microphone
in-use indicator
Speech indicator
The figure shows the TS-921.
16.2. Initiating Priority Speech (TS-921 and TS-821 only)
The Chairman unit features the function that allows its speech to take precedence over that of the Delegate unit.
The Chairman unit's speech is prior to the AUX 1, AUX 2, AUX 3, MIC 1, and MIC 2 inputs.
The priority speech method can be determined by the Priority speech key operation setting switch built in the
Chairman unit’s bottom.
Chairman unit's bottom
Priority speech key operation setting switches
ON
(Inside the cover for TS-921)
(Inside the cover for TS-821)
16.2.1. When the Priority speech key is set to PTT type (Factory-preset)
Step 1. Speak while holding down the Priority speech key.
Both the Speech indicator and the Microphone inuse indicator light, placing the unit in priority speech
mode. No sound is output from the monitor speaker
while both indicators are continuously lit. A chime
tone* sounds at other units, preventing them from
being used for speaking.
* The chime tone can be enabled or disabled using
the Priority Chime Mute switch located on the
bottom side of the unit.
ON: No chime sounds.
OFF:Chime sounds. (Factory-preset position)
Note
When two or more Chairman units are used in a
system, a priority speech currently in progress from
one unit can be interrupted by pressing the Priority
speech key of another Chairman unit, allowing the
latter unit to go through. (Last-in-first-out priority)
Step 2. Release the Priority speech key after speech
completion.
Both indicators go out, and sound can be output from
the monitor speaker.
Note
After the priority speech is completed, the other
interrupted unit resumes operation as predetermined
by the setting of the Interrupted Priority operation
setting switch located on the bottom side of the unit.
RESTORE:
Resumes the unit's mode prior to
being interrupted by the priority
speech.
RESET:Resets all units currently being used
for speech (Factory-preset position).
When an interrupted party wishes to
continue to speak, the Speech key
must again be pressed.
Note
The Chairman unit that initiated the priority speech
automatically returns to its original mode following
priority speech completion, regardless of its Priority
operation setting switch setting.
Microphone
in-use
indicator
Speech indicator
The figure shows the TS-921.
Chairman unit's bottom
The figure shows the TS-921.
(Inside the cover for
TS-921)
Priority operation
setting switch
Priority chime mute
setting switch
(Inside the cover for
TS-821)
Priority operation
setting switch
Priority chime mute
setting switch
45
16.2.2. When the Priority speech key is set to ALT type
Step 1. Press the Priority speech key.
Both the Speech indicator and the Microphone
in-use indicator light, placing the unit in priority
speech mode. No sound is output from the monitor
speaker while both indicators are continuously lit.
A chime tone* sounds at other units, preventing
them from being used for speaking.
* The chime tone can be enabled or disabled using
the Priority chime mute switch located on the
bottom side of the unit.
ON: No chime sounds.
OFF:Chime sounds. (Factory-preset position)
Note
When two or more Chairman units are used in a
system, a priority speech currently in progress from
one unit can be interrupted by pressing the Priority
speech key of another Chairman unit, allowing the
latter unit to go through. (Last-in-first-out priority)
Microphone
in-use
indicator
Speech indicator
The figure shows the TS-921.
Chairman unit's bottom
Step 2. Speak into the microphone.
Step 3. Press the Priority speech key again after speech
completion.
Both indicators go out, and sound can be output
from the monitor speaker.
Note
After the priority speech is completed, the
other interrupted unit resumes operation as
predetermined by the setting of the Interrupted
Priority operation setting switch located on the
bottom side of the unit.
RESTORE:Resumes the unit's mode prior to
being interrupted by the priority
speech.
RESET:
Resets all units currently being
used for speech (Factory-preset
position).
When an interrupted party wishes
to continue to speak, the Speech
key must again be pressed.
Note
The Chairman unit that initiated the priority speech
automatically returns to its original mode following
priority speech completion, regardless of its
Priority operation setting switch setting.
46
The figure shows the TS-921.
(Inside the cover for
TS-921)
Priority operation
setting switch
Priority chime mute
setting switch
(Inside the cover for
TS-821)
Priority operation
setting switch
Priority chime mute
setting switch
16.3. Voting (TS-921 and TS-922 only)
Vote Reception mode can be started and stopped using either the Central unit or Chairman unit.
To perform this operation from the Chairman unit, set the Voting activation setting switch to ON as shown in
the figure.
Chairman unit's bottom
Voting activation setting switch
(factory-preset to OFF)
Step 1. Set the unit to Vote reception mode.
On the Central unit, hold down the Voting start/end button for 1 second or more. On the Chairman unit,
simultaneously press Voting keys [1] and [2] for 1 second or more.
(For the Chairman unit)
(For the Central unit)
Hold down this button
for 1 second or more.
Flashes
Voting result display
Voting status
indicators
Hold down these keys
for 1 second or more.
The Voting result display (1 – 3) on the Central unit, and the Voting status indicators on the Conference
units flash, enabling voting.
(In this event, the Voting Result Display shows [--- --- 0].)
Only a priority speech can be initiated by way of the Chairman unit’s Priority speech key during voting
operation of each conference unit, and the currently used microphones of all other units are turned off.
Step 2. Vote.
Press the desired Voting key on the Conference unit, and the
corresponding Voting status indicator lights.
(Other Voting status indicators remain flashing.)
The totaled number of votes polled with the press of the voting
keys is instantly displayed on the Central unit’s voting result
display.
(Example)
Lights
Tips
• To cancel voting
Press the lit key (initially pressed for voting) again.
All keys will flash, indicating that voting is cancelled.
• To change voting
Press any flashing key (to use in voting).
The first key pressed is cancelled, and the last key pressed is
enabled and continuously lit.
47
Step 3. Terminate voting.
(For the Chairman unit)
Again hold down the Voting start/end button on the Central unit
for 1 second or more or alternatively the Chairman unit’s Talk
key.
Voting operations from the Conference units are confirmed
and Voting status indicators [1] through [3] go out. The result
Hold down this key
of computed votes is displayed on Voting result displays [1]
for 1 second or more.
through [3] on the Central unit.
Note
If voting operation was activated by the Central unit, this operation cannot be terminated by the Chairman
unit. However, if it was activated by the Chairman unit, it can be terminated by the Central unit as well.
PRIORITY
TALK
Step 4. Clear the Voting result display.
Press the Voting start/end button on the Central unit for 1 second or more once again. The display
contents are cleared from the Central unit’s Voting result display.
16.4. Using the Recording Function
The Central unit is equipped with a recording function, making it possible to create sound source files by
recording conference dialog and the like to a commercially available USB memory device. The unit is also
equipped with internal memory for recording operations, and allows recording even when abnormalities arise
with the USB memory device.
Note
Only recording can be performed by the Central unit. Use a PC to reproduce, delete or copy sound source files.
16.4.1. Notes on use
Important
Avoid removing the USB memory device during recording. If removed, the USB memory device might not
continue to function properly, or data could be lost.
•
•
•
•
•
•
•
•
•
48
Avoid simultaneously connecting a USB memory device and PC to the Central unit.
The USB memory device cannot be formatted by the unit.
While a PC is connected, neither recording nor internal memory formatting can be performed by the unit.
Only USB memory devices can be inserted into the USB memory port. Inserting other USB devices could
result in operational failure.
Move the sound source file created in the USB memory device to a PC or other device without saving it to the
USB memory device.
When inserting or removing the USB memory device or PC connector, do not apply unreasonable force to the
port. Failure to observe this instruction could lead to failure of the unit or damage to the PC or other devices.
Ensure that the USB memory device or PC connector is removed when moving the unit from one place to
another. Moving the unit with such devices inserted could cause failure to the unit or damage to the USB
memory device or PC connection port.
Be sure to replace the dustproof cover over the USB memory port and the PC connection port to prevent dust
or foreign objects from entering the ports when not in use.
Be sure to back up recorded internal memory sound source data to a PC or other device, as data could be
lost due to the unit’s failure or faulty operation.
16.4.2. Usable USB memory devices
• USB memory device (flash drive) with a capacity of up to 32 GB.
• Compatible with USB 2.0 devices.
• When using a USB memory device with the Central unit for the first time, format it with a PC before using.
Formatting conditions are as follows:
File system:
FAT32
Allocation unit size: At least 4KB
Note
Perform full formatting, not quick formatting.
• Insert the USB memory device into the PC and perform error checking before use.
• Ensure that the USB memory device is ONLY used with the Central unit, and avoid using it for other purposes.
• The Central unit is not compatible with USB memory devices having other specialized functions, such as
security functions.
• There may be cases in which a USB flash drive cannot be used with the TS-920RC, depending on the drive’s
attributes or recording conditions.
16.4.3. Sound source file specifications and filenames
Notes
• All sound inputs are mixed and recorded.
• Noise may be generated, depending on the contents or volume settings of the input sound source. If annoying,
adjust the sound volume of the conference unit or external sound source.
Shown below are specifications and filename format for recorded sound source files:
• Specifications
Recording format:
MP3 (monaural)
Sampling frequency: 32 kHz
Bit rate:
128 kbps
Maximum file size: 54.9 MB (recording time: 1 hour)
Tips
•Since the sound source file is automatically divided each time one hour elapses, the
above is the maximum size.
•The size of the internal memory is 1 GB, allowing recordings to be made for a total of
approximately 18 hrs, 40 min.
• Filename format
A filename indicating the Year, Month, Date, Hour, Minute and Second of the time that the recording was
started is automatically assigned to each file as follows:
Sound source filename: YYYYMMDD_HHMMSS.mp3
Example
In the case of a recording started at precisely 10 o’clock AM on January 1, 2019,
the filename "20190101_100000.mp3" is assigned when the recording is stopped.
When a recording is continuously made for longer than one hour, the sound source file will automatically be
divided whenever one hour passes, and the resulting file saved under a newly assigned filename.
[Time Setting and Confirmation]
Recording start time of a sound source filename is in accordance with the Central unit’s internal clock.
The internal clock can be set and confirmed using a connected PC installed with the TS-820RC/920RC
Time setting tool.
The TS-820RC/TS-920RC Time setting tool can be downloaded from the TOA product data download site
(https://www.toa-products.com/international/).
Click on the link above to access the download site, then enter the model number (TS-920RC) in the Model No.
field to search for the specified software and download accordingly.
49
16.4.4. Recording to a USB memory device
A commercially available USB memory device (flash drive/thumb drive) is required to make USB memory
recordings using the Central unit. Prepare a USB memory device that meets all the conditions shown in the
section, "Usable USB memory devices" on p. 49.
[Procedure for recording to a USB memory device]
1
Access indicator
1
3
2
Step 1. Insert the USB memory device into the USB memory port.
If the inserted USB memory device is usable, the USB memory status indicator lights green.
Important
When a USB memory device is inserted, do not remove it or turn off the power switch while the Access
indicator is lit. Failure to observe this instruction could cause damage to the USB memory device.
Step 2. Press the Recording Start button.
Recording begins. The Recording status indicator lights red and the Access indicator lights green.
Important
In some cases, quite a few seconds could pass after the USB memory device is inserted before the
USB memory status indicator lights green. Since the Central unit is in the process of recognizing the
USB memory device during this time, do not remove the USB memory device nor turn off the power
switch, as the USB memory could be damaged.
Tip
If the USB memory device’s remaining recordable time falls to less than one hour, the Remaining USB
memory capacity warning indicator will flash orange.
Step 3. Press the Recording Stop button to stop the recording.
The Recording status and Access indicators are extinguished when recording operation is complete.
Important
After the Recording Stop button is pressed, do not remove the USB memory nor turn off the power
switch while the Recording status indicator remains lit red. The red light indicates that the Central unit
is in the process of saving the sound source file for the previously stopped recording. Removing the
USB memory or turning off the power switch could interrupt the save operation and possibly result in
the sound source file being lost.
[Moving a sound source file from the USB memory device]
Using a PC, copy the sound source file to the PC’s hard drive. Refer to the instruction manual enclosed with the
USB memory device or the PC for the correct copy procedure.
Important
When disconnecting and removing the USB memory device from the PC, be sure to perform "Safe Hardware
Removal" using the PC. Please read the PC’s instruction manual regarding this removal procedure.
50
[Selecting sound source files on the USB memory device and deleting them]
Delete the selected sound source file using a PC. Please refer to the instruction manual for either the USB
memory device or the PC concerning file deletion procedures.
Important
When disconnecting and removing the USB memory device from the PC, be sure to perform "Safe Hardware
Removal" using the PC. Please read the PC’s instruction manual regarding this removal procedure.
16.4.5. Recording to the internal memory
The use of a PC with the following specifications is highly recommended when moving, copying or deleting a
sound source file recorded to the Central unit’s internal memory.
Compatible PC
Recommended operating system
Windows PC (equipped with USB ports)
Windows 10 (64-bit)
Note
Windows is the registered trademark of Microsoft Corporation in the United States and other countries.
[Procedure for recording to the internal memory]
1
1
3
2
Step 1. Confirm that no USB memory device is inserted in the USB memory port and that the Internal emory
status indicator is lit green.
Step 2. Press the Recording Start button.
Recording begins and the Recording status indicator lights red.
Tip
If the internal memory’s remaining recordable time falls to less than one hour, the Remaining internal
memory capacity warning indicator will flash orange.
Step 3. Press the Recording Stop button to stop the recording.
The Recording status indicator is extinguished when recording operation is complete.
Important
After the Recording Stop button is pressed, do not turn off the power switch while the Recording status
indicator remains lit red. The red light indicates that the Central unit is in the process of saving the
sound source file for the previously stopped recording. Turning off the power switch could interrupt the
save operation and possibly result in the sound source file being lost.
51
[Moving sound source files from the internal memory]
1
1
Step 1. Connect a PC to the PC Connection port.
The Internal memory status indicator flashes green,
and the USB drive window at right is displayed on
the PC screen.
Step 2. Open the "recording" folder.
Step 3. Select the desired sound source and move or copy it to the PC’s hard drive.
Important
When disconnecting the PC from the Central unit, be sure to perform "Safe Hardware Removal" using
the PC. Please refer to the PC’s instruction manual regarding the removal procedure.
Note
Data recorded to the Central unit’s internal memory cannot be moved or copied to the connected USB
memory device.
52
[Selecting and deleting an internal memory sound source file]
1
1
Step 1. Connect a PC to the PC Connection port.
The Internal memory status indicator flashes green,
and the USB drive window at right is displayed on
the PC screen.
Step 2. Open the "recording" folder.
Step 3. Select the file to be deleted and select "Delete" by right-clicking.
Tip
The file can also be deleted by moving it to the trash box.
[Deleting (formatting) all internal memory sound source files]
All sound source files recorded to the internal memory can be simultaneously deleted by formatting the internal
memory.
1
2
1
2
Step 1. Confirm that no USB memory device is inserted in the USB memory port, and that the Internal Memory
status indicator is lit green.
Step 2. Hold down the Format button for 5 seconds or more.
Formatting begins and both the Format in-progress indicator and the Recording status indicator flash
red.
When formatting is competed, both the Format in-progress indicator and the Recording status indicator
are extinguished.
53
17. IF ACOUSTIC FEEDBACK OCCURS
An annoying screeching sound may be produced when using a public address system. It is referred to as
"Acoustic feedback*" that will occur at various frequencies depending on the surrounding environment.
The TS-920RC's built-in Feedback suppressor (FBS) function effectively suppresses acoustic feedback through
simple operation (depresses the volume level at the feedback frequency). If the built-in FBS function cannot
deal with the acoustic feedback, an external graphic equalizer (prepare separately) can be used for more
effective feedback suppression.
Note
The following measures against acoustic feedback are effective for suppressing feedback only caused by the
Conference unit, but not effective for the feedback caused by the external microphone.
If acoustic feedback stops by fully turning down the volume of the external microphone, you will find that the
external microphone is the cause of the feedback.
In this case, decrease the external microphone's volume to a level that feedback does not occur or use the
external microphone away from the speaker.
* ‌It will occur when a feedback loop is formed in the process that sound from a speaker is picked up by a
microphone, re-amplified, and output through the speaker.
17.1. Using the Built-in FBS Function
Note
If acoustic feedback cannot be suppressed with the built-in FBS function, widen the distance between the
Chairman unit and Delegate units, reduce the output volume, or use an external graphic equalizer.
(Refer to p. 58.)
Step: Set the Feedback suppressor switch to the AUTO position.
The FBS function automatically searches a frequency that will cause
acoustic feedback and suppresses the feedback by decreasing the
volume level at such frequency.
FBS switch
17.2. Using an External Graphic Equalizer
Step 1. Connect an external equalizer to the unit as shown below.
Equalizer
OUT
Central unit TS-920RC (rear)
Step 2. Set the FBS switch to the EXT position.
FBS switch
Step 3. Take measures against acoustic feedback using the graphic equalizer.
For operation method of the graphic equalizer, read the instruction manual supplied with it.
54
IN
18. IF A FAILURE IS DETECTED
18.1. Infrared Chairman Unit TS-921/821 and Infrared Delegate Unit TS-922/822
Symptom
Cannot turn ON power.
No sound output
from the speaker or
headphones.
Cannot initiate speech.
Cause and Points to Check
(When using the lithium-ion battery)
Battery not charged.
Batteries are not charged as shipped
from the factory. Be sure to fully charge
the battery before use.
(Refer to p. 37.)
(When using the AC adapter)
Power cord or DC input plug not
connected.
Connect the power cord (supplied with
the AC adapter) and the DC input plug
correctly. (Refer to p. 38.)
Monitor Selector switch not correctly
set. (TS-921/922 only)
Set the switch to the position where
sound can be heard.
Central unit’s Microphone
switch not correctly set.
Mix/Cut
Monitor volume control not correctly
adjusted.
Adjust the volume to an appropriate
level.
Headphone plug not fully inserted.
Insert the headphone plug fully into the
jack.
Central unit’s rear panel-mounted Short
circuit indicator remains lit.
Check the cable connected to the
Central unit’s Infrared transmitter/
receiver unit I/O terminals.
Live status indicator on the Infrared
transmitter/receiver unit remains dark.
Cannot operate the
Talk key.
Remedy
Unit address numbers outside range of
001 – 192.
Set the unit address number within the
range of 001 – 192. (Refer to p. 34.)
Infrared emitter/detector exposed to
direct sunlight or spotlight.
Reposition in a location not exposed to
direct light. (Refer to p. 21.)
Infrared transmitter/receiver units and
Conference units not positioned to
permit their infrared emitter/detector
sections to be in sight of each other.
TS-905 or TS-907 Infrared transmitter/
receiver units not correctly selected to
match the ceiling height and installed so
that all the Conference units are in the
communications service area.
(If both the Power and Speech indicators
simultaneously flash, this indicates
the unit is out of the communications
service area.)
Install all the units so that they are in
clear view of each other, and select
and install the Infrared/ Transmitter/
Receiver units correctly for the ceiling
height. (Refer to p. 22.)
Cable between the Infrared transmitter/
receiver unit and the Central unit not
connected.
Connect the cable.
Priority speech is in progress.
Operate the key after the priority speech
is completed.
55
Symptom
56
Cause and Points to Check
Remedy
Indicator on the
microphone goes out
during speech.
Mic-Off function set to ON.
Disable the Mic-Off function if a long
pause is made during speech.
Microphone indicator
flashes.
Battery voltage has dropped below a
marginal level.
Replace the battery with a fully charged
one.
Chime does not sound
when the Priority
speech key is pressed.
Central unit’s rear panel-mounted
Priority Chime volume control is set to
the minimum volume position.
Adjust the volume
appropriate level.
The Priority chime mute switch in the
Chairman unit’s bottom is set to ON.
Set the Priority chime mute switch to
OFF.
Mic-Off function does
not work.
High background noise level generated
by such equipment as air conditioners.
In areas where the background noise
level is high, the Mic-Off function may
not work.
Reposition in a low-noise location or
turn off the Mic-Off function.
Battery can be used
only for a short period
of time.
Not fully charged.
Charging is completed within 5 hours.
Note:
Fully charged batteries can be
used for up to 10 hours.
(Refer to p. 37.)
Battery is approaching the end of its life.
Use a brand-new battery.
Note:
Battery can be
almost 300 times.
control
to
an
recharged
18.2. Central Unit TS-920RC
Symptom
Cause and Points to Check
Remedy
Cannot switch ON the
power.
Power cord or DC plug not connected.
Correctly connect the power cord and
DC plug supplied with the Central unit.
(Refer to p. 21.)
Recording cannot
be made to the USB
memory device or
otherwise recording
stops.
USB memory capacity is insufficient.
When its capacity is insufficient, the
USB memory remaining capacity
warning indicator lights and the USB
memory status indicator extinguishes.
Insert a USB memory device that has
sufficient remaining capacity, then
confirm that the USB memory status
indicator lights green before commencing
recording. (Refer to p. 50.)
USB memory failure. If any failure of the
USB memory device is detected, the
USB memory status indicator lights red.
Insert a different USB memory device,
then confirm that the USB memory status
indicator lights green before commencing
recording. (Refer to p. 50.)
Remaining internal memory capacity is
insufficient. When recording capacity
becomes insufficient, the Internal
memory remaining capacity warning
indicator lights and the Internal memory
status indicator extinguishes.
Delete recorded files from the internal
memory to create sufficient free space
for further recording, then confirm that
the Internal memory status indicator
lights green before commencing
recording. (Refer to p. 51.)
Internal memory failure. If any failure
of the internal memory is detected, the
Internal memory status indicator lights
red.
Reformat the internal memory, then
confirm that the Internal memory
status indicator lights green before
commencing recording.
Note
Formatting the memory causes all
recorded files on it to be deleted.
Therefore, it is highly recommended
that any necessary files be saved to an
external memory device beforehand.
(Refer to p. 53.)
Recordings cannot be
made to the internal
memory, or recording
otherwise stops.
18.3. Battery Charger BC-900
Symptom
Cause and Points to Check
Remedy
Power indicator
(green) does not light
even if the power
switch is turned ON.
AC plug is not inserted into the wall AC
outlet.
Insert the AC plug to the wall AC outlet.
Fuse has blown.
The fuse must be replaced.
For replacement, consult your TOA
dealer.
Charging status
indicator (red) does
not light even if the
lithium-ion battery
is inserted into its
receptacle.
Lithium-ion battery not correctly inserted
into its receptacle.
Insert the lithium ion battery fully into its
receptacle.
Charging terminals are dirty.
Wipe the terminals with a dry cotton
swab to clean them.
Deterioration of the lithium-ion battery.
Replace with a brand-new BP-900A
Lithium-ion battery.
Short battery recharge
duration.
57
19. APPENDIX (INFRARED TRANSMITTER/RECEIVER CONNECTION)
This chapter describes how to find the maximum cable length between the Central unit and the Infrared
transmitter/receiver unit.
Values calculated here are given only as guidelines, since they can vary depending on ambient building
conditions and the Infrared transmitter/receiver unit.
19.1. Wiring Design
19.1.1. Confirming the wiring design
To obtain the maximum cable length between the Infrared transmitter/receiver unit and the Central unit,
calculate the cable length on the following each condition. The shorter length of the two results is the required
extendable length.
(1) Maximum allowable wiring loss:
20 dB (Total cable and distributor loss)
(2) Maximum allowable DC voltage drop: 5 V
Values necessary for each calculation are as follows.
• Values necessary for calculating the loss
(1) 2-branch distributor (YW-1022) loss: 4.5 dB
(2) 4-branch distributor (YW-1024) loss: 8.5 dB
(3) Coaxial cable loss per 100 m (table shown below)
RG-59/U
3.3 dB
RG-11/U
2.0 dB
RG-6/U
2.7 dB
Note: The values in the table above are losses at 10 MHz.
• Values necessary for calculating the voltage drop
(1) Operating current per Infrared transmitter/receiver unit: 0.1 A (TS-905), 0.13 A (TS-907)
(2) Distributor resistance loss:
0Ω
(3) Coaxial cable loop resistance per 100 m (table shown below)
RG-59/U
16.82 Ω
RG-6/U
RG-11/U
12.82 Ω
2.4 Ω
Note: The values in the table above are losses at 10 MHz.
Note: Coaxial cable loss and loop resistance values used here are based on our investigation.
58
19.1.2. Computational equation
• Finding the wiring loss
Requirement: Total loss
20 dB
Cable loss = (Length / 100) x Loss per 100 m
Total loss = Cable 1 loss + Cable 2 loss + Cable 3 loss + Distributor 1 loss + Distributor 2 loss
Central Unit
Distributor 1
Distributor 2
Coaxial cable 1
Coaxial cable 2
Coaxial cable 1 loss
Coaxial cable 2 loss
Transmitter/Receiver
unit
Coaxial cable 3
Coaxial cable 3 loss
• Finding the wiring voltage drop
Requirement: Total voltage drop
5V
Cable voltage drop = (Length / 100) x Loop resistance per 100 m x Current
Cable current
= Number of the connected Infrared transmitter/receiver units x 0.1 (TS-905) or 0.13 (TS-907)
Total voltage drop = Voltage drop 1 + Voltage drop 2 + Voltage drop 3
Central unit
Distributor
Distributor
Transmitter/Receiver
unit
Coaxial cable 3
Coaxial cable 1
Coaxial cable 2
Current 1
Current 2
Current 3
Voltage drop 1
Voltage drop 2
Voltage drop 3
Note: For the coaxial cable required to carry a large current, use a cable of low loop resistance type.
[Finding the cable current]
Cable current = N
umber of the connected Infrared transmitter/receiver units x 0.1 (TS-905) or 0.13 (TS-907)
The cable current changes when the Distributor is used, as shown below.
Central unit
0.1 A
Infrared
Transmitter/Receiver
unit TS-905
Central unit
Distributor1
0.2 A
0.1 A
Infrared
Transmitter/Receiver
units TS-905
0.1 A
59
19.2. Design Examples
19.2.1. Example : ‌When installing 4 TS-905 infrared transmitter/receiver units using 4 coaxial cables
reaching from the central unit:
Infrared Transmitter/Receiver units
TS-905
Central unit
L
1) Finding the maximum cable length using maximum allowable cable losses
Assuming that the type of coaxial cable used is RG-59/U,
Maximum cable length L = (Coaxial cable loss / its cable loss per 100 m )
= (20 dB / 3.3 dB) x 100 m
= 606 m
The following table shows the maximum allowable cable length for each type of coaxial cable.
RG-59/U
606 m
RG-11/U
1000 m
RG-6/U
740 m
2) Finding the maximum cable length using voltage drop
Since one TS-905 Infrared transmitter/receiver unit is connected per coaxial cable, the current that flows
through each coaxial cable is 0.1 A.
Assuming that the type of coaxial cable used is RG-59/U,
Maximum length L = { (Voltage drop 1 / Current 1) / Coaxial cable loop resistance 1 for 100 m }
= { (5 V / 0.1 A) / 16.82 Ω } x 100 m
= 297 m
The following table shows the maximum allowable cable length for each type of coaxial cable.
RG-59/U
RG-6/U
RG-11/U
297 m
390 m
2083 m
The table below shows the required maximum cable length for the example 1, the shorter length of the
calculation results (1) and (2) above.
RG-59/U
RG-6/U
RG-11/U
60
297 m
390 m
1000 m
19.2.2. Example 2: When
‌
installing 4 TS-905 infrared transmitter/receiver units using 1 coaxial cable
reaching from the central unit (one 4-branch distributor connected):
Condition: C
able length between the Distributor and the TS-905 Infrared transmitter/receiver unit is assumed
to be 50 meters.
Central unit
Distributor
L1
Infrared Transmitter/Receiver units
TS-905
50 m
L
1) Finding the maximum cable length using maximum allowable cable losses
Assuming that RG-59/U coaxial cable is used between the Distributor and the Infrared transmitter/receiver
unit, the cable loss between the two is calculated by the following equation:
Cable loss = 3.3 dB x (50 m / 100 m) = 1.65 dB
Since the Distributor's internal loss is 8.5 dB, the maximum allowable loss between the Central unit and the
Distributor becomes 9.85 dB (20 dB – 1.65 dB – 8.5 dB).
When RG-6/U coaxial cable is used between the Central unit and the Distributor, the length L1 between the
two is,
L1 = (Coaxial cable loss / its cable loss per 100 m )
= (9.85 dB / 2.7 dB) x 100 m
= 364 m
aximum cable length L between the Central unit and the Infrared transmitter/receiver unit is calculated
M
by the following equation:
L
= L1 + 50 m
= 364 m + 50 m
= 414 m
Similarly calculated for other types of coaxial cables, the maximum cable length between the Central unit
and the Infrared transmitter/receiver unit is found in the following table.
RG-59/U
348 m
RG-11/U
542 m
RG-6/U
414 m
61
2) Finding the maximum cable length using voltage drop
The current flowing from the Distributor into each coaxial cable connected to the TS-905 Infrared transmitter/
receiver unit is 0.1 A, since the number of Infrared transmitter/receiver units connected to each coaxial cable
is 1.
Assuming that RG-59/U coaxial cable is used, the voltage drop between the Distributor and the Infrared
transmitter/receiver unit is calculated by the following equation:
Voltage drop = 16.82 Ω x (50 m / 100 m) x 0.1 A
= 0.841 V
A remaining voltage of 4.159 V (5 V – 0.841 V) is the maximum allowable voltage drop between the Central
unit and the Distributor. The current that flows between the two is 0.4 A.
When RG-6/U coaxial cable is used between the Central unit and the Distributor, the cable length L1 between
the two is,
L1 = { (Voltage drop 1 / Current 1) / Coaxial cable loop resistance 1 per 100 m }
= { (4.159 V / 0.4 A) / 12.82 Ω } x 100 m
= 81 m
aximum cable length L between the Central unit and the Infrared transmitter/receiver unit is calculated
M
by the following equation:
L = L1 + 50 m
= 81 m + 50 m
= 131 m
Similarly calculated for other types of coaxial cables, the maximum cable length between the Central unit
and the Infrared transmitter/receiver unit is found in the following table.
RG-59/U
RG-6/U
RG-11/U
111 m
131 m
483 m
The table below shows the required maximum cable length for the example 2, the shorter length of the
calculation results (1) and (2) above.
RG-59/U
RG-6/U
RG-11/U
62
111 m
131 m
483 m
19.2.3. Example 3: When
‌
installing each 4 TS-905 infrared transmitter/receiver units using 4 coaxial
cables reaching from the central unit (four 4-branch distributors connected):
Condition: C
able length between the Distributor and the TS-905 Infrared transmitter/receiver unit is assumed
to be 50 meters.
Distributor
Infrared Transmitter/Receiver units
TS-905
1
Central unit
4
L1
50 m
L
The equation and maximum cable length in this example are the same as those in Example 2 in the previous
section on p. 61.
63
19.2.4. Example 4: ‌When installing 16 TS-905 infrared transmitter/receiver units using 1 coaxial cable
reaching from the central unit (five 4-branch distributors connected):
Condition: L
ength between the Distributor 2 and the TS-905 Infrared transmitter/receiver unit is assumed to be
50 meters, and the length between Distributor 1 and Distributor 2 10 meters.
Distributor 2
Infrared Transmitter/Receiver units
TS-905
2
Central unit
Distributor 1
1
L1
5
50 m
10 m
L
1) Finding the maximum length using maximum allowable cable losses
Assuming that RG-59/U coaxial cable is used, the cable loss between the Distributor 2 and the Infrared
transmitter/receiver unit is calculated by the following equation:
Cable loss = 3.3 dB x (50 m / 100 m) = 1.65 dB
Assuming that RG-6/U coaxial cable is used, the cable loss between the Distributor 1 and Distributor 2 is
calculated by the following equation:
Cable loss = 2.7 dB x (10 m / 100 m) = 0.27 dB
Because of the 2 serially-connected 4-branch distributors, their loss is 17 dB (8.5 dB + 8.5 dB), which is
added to the above cable loss, causing a total loss of 18.92 dB (1.65 dB + 0.27 dB + 17 dB). Therefore, the
maximum allowable cable loss between the Central unit and the Distributor 1 is calculated to be 1.08 dB (20
dB – 18.92 dB).
• Assuming that RG-11/U coaxial cable is used, L1 between the Central unit and the Distributor 1 is calculated
by the following equation:
L1 = (Coaxial cable loss / its cable loss per 100 m)
= (1.08 dB / 2 dB) x 100 m
= 54 m
Maximum cable length L (Length between the Central unit and the Infrared transmitter/receiver unit)
= 54 m + 10 m + 50 m = 114 m
• Assuming that RG-6/U coaxial cable is used, L1 between the Central unit and the Distributor 1 is calculated
by the following equation:
L1 = (Coaxial cable loss / its cable loss per 100 m)
= (1.08 dB / 2.7 dB) x 100 m
= 40 m
Maximum cable length L (Length between the Central unit and the Infrared transmitter/receiver unit)
= 40 m + 10 m + 50 m = 100 m
Similarly calculated for other types of coaxial cables, the maximum cable
length between the Central unit and the Infrared transmitter/receiver unit is
found in the table.
64
RG-59/U
RG-6/U
RG-11/U
92 m
100 m
114 m
2) Finding the maximum cable length using voltage drop
The current flowing from the Distributor 2 into each coaxial cable connected to the TS-905 Infrared
transmitter/receiver unit is 0.1 A, since the number of Infrared transmitter/receiver units connected to each
coaxial cable is 1.
Assuming that RG-59/U coaxial cable is used, the voltage drop between the Distributor 2 and the Infrared
transmitter/receiver unit is calculated by the following equation:
Voltage drop = 16.82 Ω x (50 m / 100 m) x 0.1 A
= 0.841 V
When RG-6/U type coaxial cable is used, since the current flowing into each coaxial cable between Distributor
1 and Distributor 2 is 0.4 A, the voltage drop between the two is calculated by the following equation:
Voltage drop 2 = 12.82 Ω x (10 m / 100 m) x 0.4 A
= 0.513 V
Voltage drop 1 + Voltage drop 2 = 1.354 V
A remaining voltage of 3.646 V (5 V – 1.354 V) is the maximum allowable voltage drop between the Central
unit and the Distributor 1. The current that flows between the two is 1.6 A.
• Assuming that RG-11/U coaxial cable is used, L1 between the Central unit and the Distributor 1 is calculated
by the following equation:
L1 = { (Voltage drop 1 / Current 1) / Coaxial cable loop resistance 1 per 100 m }
= { (3.646 V / 1.6 A) / 2.4 Ω } x 100 m
= 94 m
Maxim cable length L (Length between the Central unit and the Infrared transmitter/receiver unit)
= 94 m + 10 m + 50 m = 154 m
• Assuming that RG-6/U coaxial cable is used, L1 between the Central unit and the Distributor 1 is calculated
by the following equation:
L1 = { (Voltage drop 1 / Current 1) / Coaxial cable loop resistance 1 per 100 m }
= { (3.646 V / 1.6 A) / 12.82 Ω } x 100 m
= 17 m
Maxim cable length L (Length between the Central unit and the Infrared transmitter/receiver unit)
= 17 m + 10 m + 50 m = 77 m
Similarly calculated for other types of coaxial cables, the maximum cable length between the Central unit
and the Infrared transmitter/receiver unit is found in the following table.
RG-59/U
RG-6/U
RG-11/U
73 m
77 m
154 m
The table below shows the required maximum cable length for the example 4, the shorter length of the
calculation results (1) and (2) above.
RG-59/U
RG-6/U
RG-11/U
73 m
77 m
114 m
65
20. SIGNAL FLOW DIAGRAM INSIDE THE CENTRAL UNIT
Translation
language
Base language
LINE
REC OUT
MIC 1 input
AUX 1 input
MIC 2 input
Interlocking
AUX 2 input
AUX 3 input
CUT
MIX
Audio signal from
Conference units
CUT
CUT
MIX
Microphone
Mix/Cut switch
(for translation
language)
MIX
Microphone
Mix/Cut switch
(for base
language)
AUX 3 output
Mix/Cut switch
(for base
language)
Recording output
Line output
Base
language
Translation
language
Note*
* Sent to each Conference unit via Infrared
Transmitter/Receiver.
66
21. SPECIFICATIONS
21.1. Central Unit TS-920RC
Power Source
Power Consumption
Current Consumption
Current Frequency
Input
Output
Equalizer Input/Output
Number of Connectable
Chairman/Delegate Units
Number of Connectable
Infrared Transmitter/Receiver
Units
Infrared Transmitter/Receiver
I/O Terminal
External Control Connection
Terminal
LED Indicator
Record Switch
Recording Ports
Recording Function
Function Switch
100 – 240 V AC, 50/60 Hz (use of the supplied AC adapter)
72 W
Max. 3 A DC (when 24 V DC is supplied from the supplied AC adapter)
Reception:
Audio channel 1:
7.35 MHz
Audio channel 2:
8.10 MHz
Audio channel 3:
8.55 MHz
Audio channel 4:
9.15 MHz
Control channel:
6.45 MHz
Transmission: Base language channel:
1.95 MHz
Translation language channel: 2.25 MHz
MIC 1 (Base Language):
–60 dB*1, 600 Ω, unbalanced, ø6.3 mm phone jack (2P)
MIC 2 (Translation Language):
–60 dB*1, 600 Ω, unbalanced, ø6.3 mm phone jack (2P)
AUX 1 (Base Language):
–20 dB*1, 10 kΩ, unbalanced, ø6.3 mm phone jack (2P)
AUX 2 (Translation Language):
–20 dB*1, 10 kΩ, unbalanced, ø6.3 mm phone jack (2P)
AUX 3 (Bass and Translation Language):
–20 dB*1, 10 kΩ, unbalanced, ø6.3 mm phone jack (2P)
LINE:
–10 dB*1, 10 kΩ, unbalanced, ø6.3 mm phone jack (2P)
REC:
–10 dB*1, 10 kΩ, unbalanced, RCA pin jack
HEADPHONES: ø3.5 mm mini jack (3P: monaural)
Input: –20 dB*1, 10 kΩ, unbalanced, RCA pin jack
Output: –20 dB*1, 10 kΩ, unbalanced, RCA pin jack
192 units
Up to 4 units (with the use of distributor, up to 16 units connectable
when they are all TS-905, and up to 12 units when they are all TS-907,
or TS-905 and TS-907 are used in combination)
BNC jack
D-sub connector (9P, male)/USB-B selectable
Voting result indicators 1 – 3 (7-segment LED, 3 digits), Short-circuit
indicator, Audio signal receiving indicators 1 – 4 CH, Data signal
receiving indicator, External control priority indicator, External control
communication indicator, Battery indicator (flashes when a Chairman/
Delegate unit's battery nears complete discharge), Recording status
indicator, Format in-progress indicator, Access indicator, Internal
memory status indicator, USB memory status indicator, Remaining
internal memory capacity warning indicator, Remaining USB memory
capacity warning indicator
Recording start button, Recording stop button, Format button
USB-A (for USB memory devices) and USB Mini-B (for PCs)
Recordings can be made to a USB memory device*2 or the internal memory.
Recording format: MP3 (MPEG-1 Audio Layer-3), monaural
Sampling frequency: 32 kHz, Bit rate: 128 kbps
Number of open microphones setting switch: 1/2/3/4
Mic-off setting switch: TIME OUT ON/OFF
Speech priority selector switch:
FIRST (First-in-first-out priority),
LATEST (Last-in-first-out priority),
FIRST:FIXED NEXT:LATEST (‌Priority fixed for the first unit, and last-infirst-out priority for all other subsequent
units.)
FBS switch: AUTO/OFF/EXT
67
Operating Temperature
Operating Humidity
Finish
Dimensions
Weight
0 to 40 ºC (32 to 104 ºF)
90%RH or less (no condensation)
Panel: Surface-treated steel plate, black, 30% glossy, paint
361 (w) x 122.6 (h) x 184.2 (d) mm (14.21" x 4.83" x 7.25")
2.8 kg (6.17 lb)
*1 0 dB = 1 V
*2 For usable USB memory devices, see p. 49.
Note: The design and specifications are subject to change without notice for improvement.
• Accessory
AC adapter (DC cord: 1.8 m or 5.91 ft, Detachable AC cord: 2 m or 6.56 ft) ....... 1
21.2. Infrared Chairman Unit TS-921, Infrared Delegate Unit TS-922
Model No.
Power Source
Infrared Emitter/Detector
Current Consumption
Wavelength
Modulation Method
Carrier Frequency
Covering Range
Input
Output
LED Indicator
Function
Battery Life
Operating Temperature
Operating Humidity
Finish
Dimensions
Weight
TS-921
TS-922
7.2 V DC (supplied from optional lithium-ion battery),
9 V DC (supplied from optional AC adapter)
Max. 390 mA
870 nm (AM: Brightness modulation)
Frequency modulation
Transmission: Audio channel 1:
7.35 MHz
Audio channel 2:
8.10 MHz
Audio channel 3:
8.55 MHz
Audio channel 4:
9.15 MHz
Control channel:
6.45 MHz
Reception:
Base language channel:
1.95 MHz
Translation language channel: 2.25 MHz
7 m or 22.97 ft (radius)
Microphone terminal: XLR-4-31 type
Monitor speaker: 8 Ω, 0.2 W
Headphones:
ø3.5 mm mini jack (3P: monaural) x 2
Speech indicator, Voting status indicators 1 – 3, Power indicator
Monitor volume control
Monitor volume control
Headphone volume control
Headphone volume control
Priority speech function
Voting function
Voting function
Monitor selector switch (MAIN/SUB)
Monitor selector switch (MAIN/SUB)
Approx. 10 hours
0 to 40 ºC (32 to 104 ºF)
90%RH or less (no condensation)
Case:
PC resin, black
Speaker net: black, mat finish, paint
205.7 (w) x 70.3 (h) x 164.2 (d) mm (8.1" x 2.77" x 6.46")
525 g (1.16 lb)
Note: The design and specifications are subject to change without notice for improvement.
68
21.3. Infrared Chairman Unit TS-821, Infrared Delegate Unit TS-822
Model No.
Power Source
Infrared Emitter/Detector
Current Consumption
Wavelength
Modulation Method
Carrier Frequency
Covering Range
Input
Output
LED Indicator
Function
Battery Life
Operating Temperature
Operating Humidity
Finish
Dimensions
Weight
TS-821
TS-822
7.2 V DC (supplied from optional lithium-ion battery),
9 V DC (supplied from optional AC adapter)
Max. 390 mA
870 nm (AM: Brightness modulation)
Frequency modulation
Transmission: Audio channel 1: 7.35 MHz
Audio channel 2: 8.10 MHz
Audio channel 3: 8.55 MHz
Audio channel 4: 9.15 MHz
Control channel: 6.45 MHz
Reception:
Audio channel: 1.95 MHz
7 m or 22.97 ft (radius)
Microphone terminal: XLR-4-31 type
Monitor speaker: 8 Ω, 0.2 W
Headphones:
ø3.5 mm mini jack (3P: monaural) x 2
Speech indicator, Power indicator
Monitor volume control
Monitor volume control
Headphone volume control
Headphone volume control
Priority speech function
Approx. 10 hours
0 to 40 ºC (32 to 104 ºF)
90%RH or less (no condensation)
Case:
PC resin, black
Speaker net: black, mat finish, paint
205.7 (w) x 70.3 (h) x 164.2 (d) mm (8.1" x 2.77" x 6.46")
525 g (1.16 lb)
Note: The design and specifications are subject to change without notice for improvement.
69
21.4. Microphone (standard) TS-923, Microphone (long) TS-924
Model No.
Type
Directivity
Rated Impedance
Rated Sensitivity
LED Indicator
Frequency Response
Output Connector
Flexible Part
Operating Temperature
Operating Humidity
Finish
Length
Weight
Applicable Unit (Option)
TS-923
TS-924
Electret condenser microphone
Unidirectional
1.4 kΩ
–37 dB (1 kHz, 0 dB = 1 V/Pa)
Speech indicator (ring type), red
100 Hz – 13 kHz
Combined type of XLR-4-32
2 parts
0 to 40 ºC (32 to 104 ºF)
90%RH or less (no condensation)
Body: Aluminum, black, semi-glossy, paint
Shaft: Copper alloy, black, semi-glossy, paint
470 mm (1.54 ft)
620 mm (2.03 ft)
130 g (0.29 lb)
150 g (0.33 lb)
Chairman unit: TS-821, TS-921, TS-811, TS-911
Delegate unit: TS-822, TS-922, TS-812, TS-912
Note: The design and specifications are subject to change without notice for improvement.
21.5. Infrared Transmitter/Receiver TS-905, TS-907
Infrared Emitter/Detector
Model No.
Power Source
Current Consumption
Wavelength
Modulation Method
Carrier Frequency
Acceptance Angle
Emission Angle
Communication Area
Connection Terminal
LED Indicator
Operating Temperature
Operating Humidity
Finish
Dimensions
Weight
TS-905
TS-907
24 V DC (supplied from the optional TS-920RC)
Max. 150 mA
Max. 180 mA
870 nm (AM: Brightness modulation)
Frequency modulation
Transmission: Audio channel 1:
7.35 MHz
Audio channel 2:
8.10 MHz
Audio channel 3:
8.55 MHz
Audio channel 4:
9.15 MHz
Control channel:
6.45 MHz
Reception:
Base language channel:
1.95 MHz
Translation language channel: 2.25 MHz
Vertical: 150°(75°+75°), Horizontal: 360°
Vertical: 90°(45°+45°), Horizontal: 360°
Vertical: 150°(75°+75°), Horizontal: 360°
Vertical: 90°(45°+45°), Horizontal: 360°
Approx. 6 – 7 m (19.69 – 22.97 ft) in
Approx. 6 m (19.69 ft) in radius from
radius from the point underneath the
the point underneath the unit (Ceiling
unit (Ceiling height: 2.5 – 4.5 m or 8.2
height: 5 – 7 m or 16.4 – 22.97 ft)
– 14.76 ft)
BNC jack
Power
0 to 40 ºC (32 to 104 ºF)
90%RH or less (no condensation)
Dome: PC resin, visible light cut filter
Base: ABS resin, black
ø120 x 71.3 (h) mm (ø4.72" x 2.81")
230 g or 0.51 lb (unit only)
Note: The design and specifications are subject to change without notice for improvement.
• Accessories
Mounting bracket ...............................................................................
Stand mounting bracket ....................................................................
Screw M3 x 6 .....................................................................................
U5/16 – NS5/8 thread adapter (except for TS-905 CE version) ........
70
1
1
3
1
21.6. Lithium-Ion Battery BP-900A
Nominal Voltage
Nominal Capacity
Operating Temperature
Operating Humidity
Dimensions
Weight
7.2 V DC
2100 mAh
0 to 40 ºC (32 to 104 ºF)
90%RH or less (no condensation)
71.6 (w) x 20.5 (h) x 37.5 (d) mm (2.82" x 0.81" x 1.48")
95 g (0.21 lb)
Note: The design and specifications are subject to change without notice for improvement.
21.7. Battery Charger BC-900
Power Source
Current Consumption
Charging Time
Charging Capacity
LED Indicator
Operating Temperature
Operating Humidity
Finish
Dimensions
Weight
100 – 240 V AC, 50/60 Hz (use of the supplied AC adapter)
Max. 5 A DC
Approx. 5 hours
8 BP-900A batteries (option)
Charging status (Green: Full charge, Red: On charge), Power indicator
0 to 40 ºC (32 to 104 ºF)
90%RH or less (no condensation)
Case:
Steel, black, paint
Battery receptacles: PPO resin, black
240 (w) x 70 (h) x 115 (d) mm (9.45" x 2.76" x 4.53")
Unit: 1.2 kg (2.65 lb), AC adapter: 520 g (1.15 lb)
Note: The design and specifications are subject to change without notice for improvement.
• Accessory
AC adapter (DC cord: 1.5 m or 4.92 ft, Detachable AC cord: 2 m or 6.56 ft ) ......... 1
21.8. AC Adapter AD-0910
Power Source
Output
Ripple Voltage
Current Consumption
Cord Length
Plug
Operating Temperature
Operating Humidity
Finish
Dimensions
Weight
100 – 240 V AC, 50/60 Hz
9 V DC, 1 A
100 mV (p-p)
400 mA AC, Input 100 V
1.8 m (5.91 ft)
RC6705, center "+"
0 to 40 ºC (32 to 104 ºF)
90%RH or less (no condensation)
Case: PC/ABS alloy, black
47.4 (w) x 33 (h) x 86.5 (d) mm or 1.87" x 1.3" x 3.41" (excluding a power cord)
190 g (0.42 lb)
Note: The design and specifications are subject to change without notice for improvement.
• Accessory
AC power cord (2 m or 6.56 ft) ................................................................................ 1
71
21.9. Distributor YW-1022 (2-branch distributor), YW-1024 (4-branch distributor)
Model No.
Frequency Range
Distribution Loss
Input/Output Impedance
Coaxial Connector
Operating Temperature
Operating Humidity
Finish
Dimensions
Weight
YW-1022
YW-1024
1.6 – 1000 MHz (excluding 50 – 70 MHz)
4.5 dB ±3 dB (between the Mixing
8.5 dB ±3 dB (between the Mixing
and each Distribution terminals)
and each Distribution terminals)
75 Ω
Mixing terminal:
Mixing terminal:
BNC jack, power passing type
BNC jack, power passing type
(30 V DC or less, 2 A or less)
(30 V DC or less, 2 A or less)
Distribution 1 and 2 terminals:
Distribution 1 – 4 terminals:
BNC jack, power passing type
BNC jack, power passing type
(30 V DC or less, 1 A or less)
(30 V DC or less, 1 A or less)
–10 to +50 °C (14 to 122 ºF)
90%RH or less (no condensation)
ABS resin, gray
75 (w) x 122 (h) x 34 (d) mm (2.95" x 4.8" x 1.34")
105 g (0.23 lb)
120 g (0.26 lb)
Note: The design and specifications are subject to change without notice for improvement.
• Accessories
Wood screw 4.1 x 25 (for fixing the unit) .... 2
21.10. Rack Mounting Bracket MB-TS920
Finish
Dimensions
Weight
Surface-treated steel plate, black, paint, 30% glossy
65.5 (w) x 177 (h) x 61 (d) mm (2.58" x 6.97" x 2.4")
680 g (1.5 lb)
Note: The design and specifications are subject to change without notice for improvement.
• Accessories
Rack mounting screw 5 x 12 ...................... 4
Fiber washer (for M5) ................................. 4
Traceability Information for Europe
Manufacturer:
TOA Corporation
7-2-1, Minatojima-Nakamachi, Chuo-ku, Kobe, Hyogo,
Japan
Authorized representative:
TOA Electronics Europe GmbH
Suederstrasse 282, 20537 Hamburg,
Germany
URL: https://www.toa.jp/
133-07-00131-00
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