How it Works
Lectrosonics
Loading...
TH3

Lectrosonics TH3 Operating Instructions Manual

TH3
Digital Telephone Hybrid
OPERATING INSTRUCTIONS
and trouble-shooting guide
LECTROSONICS, INC.
Rio Rancho, NM
INTRODUCTION
Lectrosonics is proud to offer the TH3, our third generation digital hybrid. The TH3 interfaces with a standard telephone line to add teleconferencing capability to any sound system. Sophisticated featues, fast setup, easy operation, high sound quality and low cost make the TH3 an ideal choice for board rooms, conference rooms, talk radio and countless other applications.
Product Highlights
• DTMF dialing capability
• Simultaneous 2-wire/4-wire bridging for 3-site conferencing
• Three-way echo elimination with patented algorithm
• Level meters for easy setup
• Privacy mode can mute transmit only, receive only, or both
• AGC enhances volume of weak signals
• Wired remote control interface
• Serial interface for integration with control systems
• Front panel switches may be disabled for secure installation
• Tape recorder output with relay for automatic recording
• Automatic telephone answer and disconnect
• Compatible with third-party echo cancellers
INTRODUCTION.................................................................................................. 2
FRONT PANEL..................................................................................................... 3
REAR PANEL ....................................................................................................... 4
BRIEF TECHNICAL DESCRIPTION ................................................................... 5
TH3 WIRING GUIDE............................................................................................ 6
BASIC OPERATION.............................................................................................9
LEVEL SETTING PROCEDURE ....................................................................... 10
TH3 SOFTWARE CONTROL PANEL ................................................................ 11
SERIAL PORT HARDWARE AND SOFTWARE ............................................... 15
LecNet SERIAL PORT PROTOCOL.................................................................. 16
ACCESSORIES.................................................................................................. 22
GLOSSARY OF TH3 CONCEPTS..................................................................... 22
SPECIFICATIONS..............................................................................................23
TROUBLESHOOTING .......................................................................................24
FCC N OTI C E S ................................................................................................... 25
SERVICE AND REPA IR ..................................................................................... 27
RETURNING UNITS FOR REPAIR................................................................... 27
WARRANTY ......................................................................................... Back cover
2
Digital Telephone Hybrid
FRONT PANEL
LECTROSONICS, INC.
RIO RANCHO, NM U.S.A.
TX
LEVEL
TELEPHONE
RX
LEVEL
CODEC
RX
LEVELTXTRIM
LecNet
ANTI-ECHO
LecNet
ANTI-ECHO
RX
LEVEL
The TX LEVEL control is used to set the proper amount of local signal, with the aid of the TX LEVEL meter. The TELEPHONE RX LEVEL control is used to set the proper telephone receive level, with the aid of the RX LEVEL
meter. The CODEC RX LEVEL control is used to set the proper codec receive level, with the aid of the RX LEVEL meter. The CODEC TX TRIM control adjusts the level supplied to the CODEC OUT plug on the rear panel, accommodating
level requirements of the codec. The LecNet ANTI-ECHO control adjusts the amount of echo reduction applied to a Lectrosonics automatic micro-
phone mixer (e.g. AM8 or AM16) via the LecNet expansion port.
DIGITAL HYBRID
TX
LEVEL
The LecNet ANTI-ECHO, RX LEVEL and TX LEVEL meters aid in setting system audio levels optimally.
The TELEPHONE and CODEC interfaces include the following b uttons and indicators.
TELEPHONE CODEC
CONNECT
PRIVACY
UP
RECEIVE VOLUME
DOWN
CONNECT
PRIVACY
RECEIVE VOLUME
UP
DOWN
SWITCHES DISABLED
POWER
The CONNECT button initiates or terminates a connection. The CONNECT led indicates an active connection. The telephone connect led flashes when the telephone line is ringing.
The PRIVACY button mutes either the transmit signal, the received signal, or both, depending on the interface’s current privacy mode. When the privacy feature is engaged, the PRIVACY led flashes to indicate the current privacy mode, then glows steadily. Pr ivacy may be disengaged by pressing the button again. For detailed information about privacy modes, please refer to the Privacy Feature topic in the chapter on BASIC OPERATION.
The RECEIVE VOLUME buttons permit fine control of the receive volume during normal operation. Each button press alters the receive gain by 1 dB, and the control offers a range of -12 dB to +6dB (19 settings). The default setting of 0 dB may be restored by pressing both volume buttons simultaneously.
The SWITCHES DISABLED led indicates that the interface buttons on the front panel have been disabled at the installer’s option. The wired remote controls and serial commands will operate normally.
The POWER switch turns the TH3 on and off. The POWER led serves as a power status indicator.
Rio Rancho, NM – USA
3
REAR PANEL
PWR
IN
(CH40)
20 VAC
EXPANSION
OUT
IN
LecNet
(RS232)
REMOTE CONTROLS
TELEPHONE
CODEC
The PWR IN jack must be attached to an appropriate power source, such as the included CH40 wall transformer. The EXPANSION OUT and EXPANSION IN jacks are used to attach the TH3 to other LecNet equipment (e.g. AM8
or AM16 mixers). The LecNet (RS232) jack may be connected to the serial port of a personal computer for configuration and testing. The REMOTE CONTROLS connectors may be wired to switches and leds for wired remote control of the TH3’s
interface functions (connect, privacy, volume up and volume down). A pinout of the remote control ports is provided in the SPECIFICATIONS chapter.
AUX
IN OUT
+
–
SUPPLEMENTARY
ECHO CANCELLER
RECORD OUT
OUTPUT
LEVEL
+
–
FINE
LEVEL
RELAY
COARSE
LEVEL
+
–
LINE
MIC
RX INSERT
+–+
OUTIN OUTIN
TX INSERT
+
+
–
–
–
CODEC
+–+
OUTIN
–
TELEPHONE
LINESET
The AUX interface provides line level, balanced or unbalanced main input and output from the TH3. Any signal imposed at AUX IN is transmitted to all connected interfaces, and any signal received from connected interfaces is available at AUX OUT, with as little of the transmitted signal as possible. The OUTPUT LEVEL control may be used to match the TH3’s AUX OUT signal with the level requirements of any attached equipment.
The RECORD OUT interface contains a mix of transmitted and received signals, suitable for recording all parties in a conversation. The signal may be used balanced or unbalanced. The COARSE LEVEL switch and FINE LEVEL control easily accommodate the most common level requirements. When used as an unbalanced output, ground the negative output to ensure proper operation of the COARSE LEVEL switch. The relay contacts are closed when a connection is active, and open otherwise.
The SUPPLEMENTARY ECHO CANCELLER jacks may be used to connect an external echo canceller for addi- tional acoustic echo cancellation. Balanced operation is recommended, though unbalanced operation is possible.
The CODEC jack provides line level, balanced or unbalanced input and output connections to an external four wire codec, as is commonly used in video conferencing applications. The CODEC RX LEVEL and CODEC TX TRIM front panel controls may be used to accommodate a wide range of audio levels, including the industry standard levels, -10 dBV and +4dBu.
The TELEPHONE SET jack may be connected to an external telephone device. The device is connected to the telephone line only when the TH3 telephone interface is not connected. A standard telephone set, attached to this jack, may be used for dialing where DTMF dialing from the TH3 via the serial port is not practical or convenient.
The TELEPHONE LINE jack connects to a standard telephone line.
4
Digital Telephone Hybrid
BRIEF TECHNICAL DESCRIPTION
The TH3 provides a high-quality, flexible and powerful interface to a telephone line, a 4-wire video codec, or both simultaneously with bridging. Each interface offers basic controls to connect, invoke privacy (selective mute), and perform fine adjustments to the receive volume. The basic controls are available from the front panel, the wired remote controls, and via the serial port. Using the serial port, additional features may be controlled, such as echo suppression settings, telephone receive AGC, auto answer and auto disconnect, DTMF dialing and specialized signal routing.
PHONE
INTERFACE
CODEC
INTERFACE
AUX PORT
EXPANSION
PORTS
MAIN IN
MIX- IN
MAIN OUT
LINE ECHO
CANCEL
"CODEC TX TRIM"
"CODEC RX L E V E L "
"OUTPUT LEVEL"
"TELEPHONE
RX LEVEL"
ECHO
SUPPRESSION
(SOFT)
"MAIN IN" "MIX MINUS IN "
(SOFT)
AGC
ECHO
SUPPRESSION
(SOFT)
"AUX INPUT" "EXPANSION PORT"
"RX LEVEL"
RX BUS
TX BUS
"TX LEVEL"
"TX LEVEL"
MIX- OUT
SIG IN
SIG OUT
SIG TOTAL
log
"MAIN OUT" "MIX MINUS O UT"
"LECNET ANTI-ECHO"
TH3 Block Diagram
Rio Rancho, NM – USA
"LECNET ANTI-ECHO"
"FINE LEVEL"
"COARSE LEVEL"
LINE/MIC
SWITCH
RECORD
OUT
5
TH3 WIRING GUIDE
Following are example wiring diagrams for various types of installations.
Example 1: AM8 MIXER
In this example, the TH3 is connected to an AM8 mixer, and both local and remote signals are amplified. The single LecNet cable passes signals both to and from the AM8.
PWR
(CH40)
20 VAC
PWR
(CH40)
20 VAC
IN
EXPANSION
IN
M
S
A S
L
T
A
E
V
R
E
OUT
EXPANSION
OUT
IN
LecNet
(RS232)
IN
LecNet
(RS232)
Switch in MASTE R position
Sound Reinforcement Amplifier
REMOTE CONTROLS
TELEPHONE
LECTROSONICS, INC.
REMOTE LEVEL
CONTROL
MAIN OUT
+ –
CODEC
CH8 IN
1 2 3 4
INPUT
TH3
+
–
AM8
DIR OUT
PWR
(CH40)
20 VAC
PWR
(CH40)
20 VAC
EXPANSION
IN
IN
M A
S L
S T
A V
E R
E
OUT
EXPANSION
OUT
IN
LecNet
(RS232)
IN
LecNet
(RS232)
Switch in MASTE R position
Sound Reinforcement Amplifier
REMOTE CONTROLS
TELEPHONE CODEC
LECTROSONICS, INC.
REMOTE LEVEL
CONTROL
MAIN OUT
+ –
CH8 IN
1 2 3 4
INPUT
+
–
AM8
AUX
OUTPUT
IN OUT
LEVEL
+
+
–
–
TH3
Example 2: AM8 MIXER, NO LOCAL
DIR
OUT
SOUND REINFORCEMENT
In this example, the TH3 is connected to an AM8 mixer, and only the remote signals from the TH3 are amplified. The single LecNet cable passes signals both to and from the AM8.
6
Digital Telephone Hybrid
PWR
(CH40)
20 VAC
PWR
(CH40)
20 VAC
EXPANSION
IN
IN
M A
S
S
L A
T E
V
R
E
OUT
EXPANSION
OUT
IN
LecNet
(RS232)
IN
LecNet
(RS232)
Switch in SLAVE position
PWR
IN
EXPANSION
(CH40)
20 VAC
M
S
A S
L A
T E
V
R
E
IN
OUT
LecNet
(RS232)
Switch in MASTE R position
Sound Reinforcement Amplifier
REMOTE CONTROLS
TELEPHONE
LECTROSONICS, INC.
REMOTE LEVEL
CONTROL
MAIN OUT
+ –
LECTROSONICS, INC.
REMOTE LEVEL
CONTROL
MAIN OUT
+ –
CODEC
CH8 IN
1 2 3 4
CH8 IN
1 2 3 4
INPUT
+
–
AM8
+
–
AM8
DIR OUT
DIR OUT
AUX
IN OUT
+
–
OUTPUT
LEVEL
+
–
TH3
Example 3: TWO AM8 MIXERS
In this example, the TH3 is connected to a pair of AM8 mixers. Both local and remote signals are amplified. The single LecNet cable passes signals both to and from the AM8.
Note the interconnection of the mixers, with the last mixer in the chain set as the master. This technique may be used to add mixers to any of the other examples.
Example 4: AM16 MIXER
In this example, the TH3 is connected to an AM16 mixer. Due to the flexibility of the
PWR
(CH40)
20 VAC
EXPANSION
IN
IN
OUT
LecNet
(RS232)
REMOTE CONTROLS
TELEPHONE
CODEC
AUX
IN OUT
+
–
+
–
AM16, the same wiring configuration may be used whether or not local sound reinforce­ment is required. The single LecNet cable
ON
LecNet
(RS232)
AUDIO EXPANSIO
AUDIO EXPANSIO
LINE
1 10 9
C
UTPUTS
0dB GAIN (LINE) +30dB GAIN (ELECTRET) +50dB GAIN (DYNAMIC)
GAIN 6
5
65
+––+
GAIN 4
LINE OUTPUTS
43
3
21
43658710 9
+––++––++––++––+
GAIN
21
2
1
+––+
passes signals both to and from the AM16. In the AM16 software setup, Misc Settings
tab, be sure the Expansion In port is linked to the NOM bus associated with the micro­phones (usually NOM 1). This ensures that the LecNet anti-echo feature will work
PWR
IN
EXPANSION
(PS60)
M
OUT IN
S
A S
L
16.5 VAC
T
A
E
V E
R
PHANTOM POWER
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
MADE IN U.S.A.
OFF
correctly.
Sound Reinforcement Amplifier
INPUT
AM16 NOM settings
The Matrix Setup tab must assign “Exp In” to the amplified output, so the remote signals can be heard. The matrix may be further manipulated to route the microphone signals to the amplifier, or not, as desired.
OUTPUT
LEVEL
TH3
+––+
+––+
AM16
AM16 Matrix Settings
Rio Rancho, NM – USA
7
Example 5: NON-LECTROSONICS MIXER
In this example, the TH3 is connected to a third-party mixer, and both local and remote signals are amplified.
REMOTE CONTROLS
TELEPHONE
CODEC
AUX
IN OUT
+
–
LEVEL
FINE
LEVEL
RELAY
COARSE
LEVEL
+
–
LINE
MIC
OUTPUT
+
–
RECORD OUT
TH3
Note that the combined local and remote signal is derived from the record out jack on the TH3. This is valid and completely functional, but with this configura­tion the TH3 must be powered on in order for the local microphones to be audible through the sound reinforce­ment system.
The LecNet anti-echo feature of the TH3 will not work without a Lectrosonics mixer.
Microphone Mixer
OUTPUT
Sound Reinforcement Amplifier
INPUT
Example 6: NON-LECTR OSONICS MIXER, NO LOCAL SOUND REINFORCEMENT
In this example, the TH3 is connected to a third par ty mixer, and only remote signals are amplified.
The LecNet anti-echo feature of the TH3 will not work without a Lectrosonics mixer.
8
REMOTE CONTROLS
TELEPHONE CODEC
IN OUT
Microphone Mixer
Sound Reinforcement Amplifier
AUX
+
–+–
OUTPUT
LEVEL
FINE
LEVEL
RECORD OUT
RELAY
+
OUTPUT
INPUT
–
COARSE
LEVEL
MIC
TH3
LINE
Digital Telephone Hybrid
BASIC OPERATION
This chapter describes the TH3’s most essential user functions. The word “interface” is used here to distinguish between the controls associated with the telephone (“telephone interface”) and those associated with the 4-wire codec (“codec interface”).
Placing a T elephone Call
Telephone calls may be initiated from the TH3’s front panel, from a wired remote control, or from a PC or control system connected via the TH3’s serial port. The TH3’s DTMF dialer may be used only from a PC or control system.
The simplest way to place a call is to attach a standard telephone to the Telephone Set jack. Dial the call with the telephone, then press the CONNECT button for the telephone interface. When the TH3 connects, it automatically disconnects the telephone set from the line. The CONNECT led will turn on and remain illuminated for the duration of the call.
If the TH3 does not remain connected, please refer to the TROUBLESHOOTING chapter. For information about using the TH3 software control panel to dial a call, please refer to the chapter on the TH3
SOFTWARE CONTROL PANEL.
Answering a Telephone Call
Upon receipt of an incoming call, the CONNECT led flashes and, optionally, a beeping sound is sent to the audio outputs to indicate a ringing condition. By default, the TH3 will not answer telephone calls automatically. To manually answer an incoming telephone call, press the CONNECT button for the telephone interface on either the front panel, the wired remote control, or the TH3 software control panel. The CONNECT led will turn on and remain illuminated for the duration of the call.
If the TH3 does not remain connected after answering, please refer to the Troubleshooting chapter. For information about answering the phone from the TH3 software control panel or configuring the TH3 to answer
incoming calls automatically, please refer to the chapter on the TH3 Software Control Panel.
Ending a Telephone Call
The CONNECT button acts as a toggle. Pressing it while a call is in progress will disconnect the call. The TH3 offers an automatic disconnect feature which is disabled by default. On telephone networks supporting this
feature, the TH3 can automatically disconnect when the other party disconnects. This feature is not compatible with some PBX systems and the call waiting feature on some telephone networks. Please refer to the TH3 SOFTWARE CONTROL PANEL chapter for information on enabling automatic disconnect.
Using the 4-wire Codec
The codec interface works nearly identically to the telephone interface, except that it is simpler. The codec interface requires no dialing, and no automatic answer or automatic disconnect features are offered.
To connect or disconnect, simply press the codec CONNECT button on either the front panel, the wired remote, or the TH3 software control panel.
Rio Rancho, NM – USA
9
Loading...
+ 19 hidden pages
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use