TeachLogic Ovation OA-50 Manual de usuario

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User Guide: OA-50

TeachLogic’s Ovaon Amplier/ Mixer/ Receiver (OA-50) uses special DECT (Digital Enhanced Cordless Telecommunicaons) radio

technology to wirelessly receive audio, making it perfect for any size or type of classroom. With four inputs, two outputs, and two

mic channel receivers, the OA-50 can integrate various media devices and simultaneously use two wireless microphones to

supplement your presentaon material for added student engagement.

DIAGRAM 1: Main System Controls

1234567891110 12

13245678910 11 12 13 14 15

Front Panel

1. Power Button Logo Indicator Light

2. MIC A Microphone Volume Control

3. MIC A Pairing Button and Indicator Light

4. MIC B Microphone Volume Control

5. MIC B Pairing Button and Indicator Light

6. DVD Input Volume Control

7. Computer Input Volume Control

8. Aux Input Volume Control

9. Video Conference Input Volume Control

10. Video Conference Input Port (3.5 mm)

(Also suitable for Aux audio source)

11. Video Conference Output Volume Control

12. Video Conference Output Port (3.5 mm)

(Also suitable for Lesson Capture)

Back Panel

1. Speaker Output

2. Fire Alarm Mute Input

3. Page Input

4. Page Sensitivity Control

5. Page Input Voltage Selector

6. ALS Output (3.5 mm) & Gain Control

7. Five Band Equalizer Controls

8. RS-232 Input & OFF/ON Switch

9. Security Alert Interface

10. Aux Input Port (3.5 mm) & Mic/Line Level

Selector; Mic: -40dB/Line: -10dB

11. Computer Input Port (3.5 mm) / Computer

Anti-Hum ON/OFF Switch

12. DVD Input Port (3.5 mm)

13. External Pairing Control for OP-10 Wall Mount

Control Panel

14. 5 Volt USB Output for Chargers

15. Power Input: 19 Vdc, 3.5 A

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DIAGRAM 2: Side Switches

DIAGRAM 3: OP-10 Buttons

1. MIC A Pairing Button

2. MIC A Pairing Indicator Light

3. MIC B Pairing Button

4. MIC B Pairing Indicator Light

5. OA-50 Power Button

6. Power Status Indicator Light

DIAGRAM 4: Speaker Wiring

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TABLE 1: OA-50 Power Button Indicator Lights

The main power (logo) buon on the amplier’s front panel has mulple indicaons as shown in the table below.

TABLE 2: OA-50 Power (Logo) Button Controls

Red Solid Off

Note that power is still supplied to USB port on back panel.

Red Blinking Muted by Fire Alarm Mute Input

Blue Solid On

Blue Blinking Page detected and audio sources muted

Blue Slow Blinking In Standby (or “Sleep”) mode. See “Standby Mode” below

Purple Solid

In Talkover mode. All line inputs are lowered in volume

(“ducked”) to allow microphones to be better heard.

“Talkover” mode can be triggered by pressing the spring

switch on the left side of the OM-10 pendant mic.

Yellow Blinking (3x)

Radio (RIB) reset. Requires 6 sec power button press (when

blue) to reset.

Note that both pair lights (pictured in Diagram 1 as #3 and #5

on the front panel) will also flash green 3x.

Green Blinking Security Alert activated. Also indicates whether in Security

Alert 1- or 4- pulse mode (see “Security Alert” section below).

Tap

Off —> On

Standby —> On

On —> Off

Double Tap

On —> Standby

Press and Hold 6s

On —> Radio Reset

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Initial Setup

Powering your OA-50 On and O

• To power your OA-50, you must rst connect the external power supply cable to the power input (labeled “POWER 19V DC 3.5A”)

on the back of your OA-50. Then plug the power supply’s cord into a 110Vac wall outlet.

• Once plugged in, your OA-50’s power/ logo buon light will illuminate red or blue indicang power is being received. Red indicates

O, and blue indicates On. It will be in whichever state it was in when last powered.

• If o (red), turn it on by tapping the logo buon once. The buon light will turn blue.

• To turn o your OA-50, tap the logo buon once more, and the light will turn back to red.

• You may also manually put the OA-50 into standby mode by double pressing the logo buon. You can do this from a blue light

“On” state.

Connecng Loudspeakers to your TeachLogic System

• On the back panel of your OA-50 (#1 in Diagram 1 above), there is a 4-pin blue terminal block connector used for loudspeaker

connecon. The OA-50 can power 4 classroom speakers.

• There are two loudspeaker (amplied audio) channels, each rated for a minimum 4-ohm speaker load (two 8-ohm speakers each,

connected in parallel provide 4 ohms impedance). See Diagram 4: Speaker Wiring above.

Pairing a Mic to your OA-50 - MIC A or MIC B

 What is Pairing? Since the TeachLogic DECT microphones are compable with any OA-50, and there may be many of both

products in your building, it is important to associate your mic to the specic OA-50 in your classroom. This associang is called

“pairing”. To pair your OM-10 pendant mic or OM-20 handheld mic with your OA-50, you will need to tell your mic to

communicate with your specic receiver and not another down the hallway.

 Choosing the right channel: On your OA-50, there are two channels to which you can pair your microphone; select either A or B.

Usually, the teacher microphone will be paired as MIC A while the student mic will be paired as MIC B.

• To pair, both mic and receiver (OA-50) will need to be in pairing mode. To do this, refer to Diagram 1 and the below

instrucons.

Note: In this example, we will be pairing an OM-10 with an OA-50. For instrucons on how to pair with an OM-20 see the OM-20

user guide.

1) Press the spring switch on the le side of your mic and the logo buon at the same me and hold both for 3 seconds.

• This will iniate the pairing mode for your microphone, and it will begin to fast-ash green. It will stay in this pairing mode

for 1 minute or unl paired.

2) During this me, press and hold the pairing buon on the OA-50 next to the MIC channel you want to pair with (or on the OP-

10 wall panel if installed) for 3 seconds.

• This pairing buon will illuminate and start fast-ashing green indicang it has entered the pairing mode. It will stay in this

pairing mode for 1 minute.

3) While both units are in pairing mode, they will nd each other and become paired. Once the pairing has been established, the

mic logo buon will turn solid blue and the OA-50 pairing buon will change to solid green. Your mic is now paired and

connected, ready to be used with your TeachLogic system.

Pairing vs Connecng

• Pairing your mic and receiver creates a sustained link between the two. Your mic and OA-50 will each remember its pairing even

aer being turned o and on. The act of pairing does not need to be repeated each me you use your mic. Each mic and receiver

channel is paired to at most one other device.

• Connecng is when data transmits between the two paired devices. When connected, the two devices are communicang with

each other allowing audio to be passed through and heard. If already paired, your mic will automacally connect to your OA-50

each me they are both on.

• This automac connecng will connue unl either device has terminated the pairing.

Un-pairing your OA-50

• You may wish to un-pair your receiver from your mic if you want to stop using your mic with your receiver. There are two

methods.

1) To un-pair your mic from your OA-50, press the pairing buon next to the channel you wish to un-pair and hold for 3 seconds.

Ideally, perform this un-pairing when the mic and OA-50 are both on.

2) Alternavely, you can use the microphone to un-pair the two devices. To un-pair using the mic, press and hold for 3 seconds

the same two buons used to pair (the spring switch on the le side of your mic and the logo buon in the center of your

mic).

• The channel pairing indicator light on the OA-50 will turn o, and the logo buon light on your mic will turn yellow indicang they

are no longer paired. Transmission of audio will stop on that channel.

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Using your OA-50

Using your Audio Inputs

• The OA-50 has 4 audio inputs to integrate various media devices so you can supplement your presentaon material for added

engagement. These 4 input channels can all be used simultaneously with your microphone; they include: DVD, Computer,

Auxiliary, and Conference.

• Each input channel is appropriate for “line level” inputs from a variety of devices. The DVD input is calibrated for a slightly

higher-level input signal. Inputs may be stereophonic or monophonic, and will be converted to monophonic in the

OA-50.

I. DVD Input

• Pictured in Diagram 1 as #12 on the back panel, the 3.5mm DVD input is frequently used with xed video

displays and mobile TV carts. You can control the volume by turning the DVD volume knob (#6 on the front panel of

Diagram 1) clockwise (“CW”) to increase or counterclockwise (“CCW”) to decrease the volume of the audio on this input

channel.

II. Computer Input

• On the back panel (#11 on Diagram 1) is the Computer input where you can use a 3.5mm stereo audio

jack to connect your computer output to your OA-50. To increase or decrease the volume of your

Computer audio, you can turn the Computer volume knob (#7 on the front panel of Diagram 1) CW to

increase or CCW to decrease the channel’s volume.

• The Computer input has a switchable feature called “An-Hum” to eliminate or reduce 60 Hz “ground

loop” hum sounds oen present when computers are connected to external ampliers.

Note: If this feature is not needed, it is beer to leave the switch in the “OFF” posion as the sound

quality for the connected device will be slightly beer in the “OFF” posion.

III. Auxiliary Input

• On the back panel (#10 on Diagram 1) is the Auxiliary channel for your OA-50. This 3.5mm port is commonly used to

connect sound sources such as a video displays or cell phones with a line level audio output. You can turn the AUX

volume knob (#8 on Diagram 1) CW to increase or CCW to decrease the input volume.

• The Auxiliary Input has a switchable feature called “Level” where you can choose between “MIC”

or “LINE”. If using a wired “dynamic” microphone in this input, it is best to select “MIC” and for

all other audio sources, one should select “LINE” because “LINE” signals are higher level signals.

Note: Connecng a line-level source to this input if set to MIC level will cause distoron and

excess loudness from your speakers. On the other hand, connecng a mic-level source to

a LINE level input will result in lile to no sound as the mic signal is too weak for the line level seng. For these

reasons, it is important to ensure you select the correct level when using this channel.

IV. Conference Input

• Shown as #10 on the front panel of Diagram 1, the Conference Input is used to ensure all students hear equally well

regardless of their locaon. This input uses a 3.5mm stereo audio jack to connect a device hosng an audio or video

conference (such as a computer using Zoom, Teams, or a at panel video display using Hangouts). Connect the computer/

display audio output to the Conference Input on the OA-50 to share all audio from distance learners, including devices

connected directly to their computer, and to play this audio through the TeachLogic OA-50 speakers in the classroom.

• The Conference Input’s volume control knob is located directly to the le of the input (#9 on the front panel of Diagram 1).

Like the other knobs, turn it CW to increase or CCW to decrease the input volume.

• The Conference Input may have the “Echo Guard” feature switched On or O. The Conference Output mixes various input

channels, including any device’s audio plugged into the Conference Input. When both the Conference Input and Conference

Output are being used simultaneously, the Echo Guard should be switched to On. This will prevent the Conference Input

channel’s audio from creang an echo on the Conference Output channel. The Echo Guard otherwise does not need to be

On when Conferencing Output is not being used.

TeachLogic recommends a USB

connection. USB simplifies cable

management, and most video con-

ferencing applications automatical-

ly recognize a USB connection in

their audio settings menu. (See

recommended adapter shown

here.)

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Using your Audio Outputs

• The OA-50 has 2 audio outputs that ensure distance learning students as well as students with hearing impairments can hear

their instructor and the audio material available to other students in the classroom.

I. Conference Output

• Shown as #12 on the front panel of Diagram 1, a 3.5mm stereo audio jack can be used to deliver audio to conference

parcipants. The audio can come from wireless microphones in the classroom as well as from all other media devices

connected to the TeachLogic OA-50.

• The Conference Output’s volume control knob is located directly to the le of the Conference Output (#11 on the front

panel of Diagram 1). Turn the knob CW to increase or CCW to decrease the output volume.

Note: For further instrucon on how to set up your Conference Input and Output for distance learning, follow this link:

hps://nyurl.com/52xjh3z8

II. Assisve Listening System (ALS) Output

• This output is generally used with an Assisve Listening System already set up in your classroom. By connecng

a 3.5mm jack from the output on the back of your OA-50 to your ALS, students with hearing loss can directly

receive sound via their personal receiver from anything that the TeachLogic system amplies.

• The ALS Output can also be directly connected to a student’s personal transmier via a 3.5mm jack cable if

needed.

• The ALS Output audio will include a mix of all the audio inputs on the OA-50, including the audio received on

the Page Input. Thus, a student listening on an ALS device will hear pages if they are routed to the OA-50 loud-

speakers (see below “Page Pass Through”).

• Equalizer Controls

• Five knobs along the top of the OA-50 (#7 on the back panel in Diagram 1) are controls for the equalizer. Use these controls to

increase or decrease the dierent spectral parts of audio output to ensure audio quality is at its best.

• Normally these controls are set in their 0 dB posions as shown.

Using your 5 Volt Output

• A USB-A port on the OA-50 (#14 on the back panel in Diagram 1) provides a 5Vdc power output. This output can be used to

charge your microphone with a single cable. It can also power an OC-20 Charging Staon to charge mulple mics at one me.

• This power port should not be used with non-TeachLogic devices which may require too much power and may overload the port.

Reseng your OA-50

• If your OA-50 is not pairing as expected, you can manually reset the radio by pressing and holding the logo buon (#1 on the

front panel in Diagram 1) for 6 seconds. Or you can press and hold the OP-10 power buon. The OA-50 logo buon will blink

purple 3x, briey power o, then power back on to the solid blue state. This should remedy any radio error state that may have

occurred.

Standby Mode

• Standby Mode is a feature that reduces power consumpon aer the OA-50 has not been used to amplify audio signal for a

period of two hours. Aer entering the automac standby mode, the OA-50 power buon displays a slow blinking blue light.

• Normal “On” mode may be resumed by:

1. Powering on a TeachLogic Ovaon microphone that is paired with your OA-50.

2. Sending an audio signal into one of the line inputs of the OA-50 from a connected source such as a computer or at panel

audio signal.

3. Pressing the power buon on your OA-50 once (or on your OP-10).

Note: It may take a few seconds for the normal On mode to resume aer one of these acons is taken. A page signal can also

“wake” the amplier, but to hear the full rst page of the morning, be sure to wake the OA-50 rst with one of the

methods above because the inial seconds of a page may be missed as the amplier is waking up (if there are no other

paging speakers provided to deliver the page audio).

External and Internal Antennae

• Your OA-50 comes with one internal and one external secondary antenna. A switch on the side of the OA-50 allows you to select

between the two. These antennae receive signals from the Ovaon wireless microphones or from other transmiers. In medium to

large sized rooms, the external antenna should be selected and connected as instructed below.

• You can aach the supplied external antenna directly to the back panel of your OA-50 by screwing it onto the gold threaded

connector (SMA type) on the back panel. An extension cable for the antenna may also be used for remote antenna locaon. You

may opmize recepon quality by adjusng the orientaon and/ or locaon of the antenna. Higher non-blocked locaons are best.

Note: When threading your external antenna onto the gold threaded connector, be sure the knurled poron is only nger

ghtened. To change the orientaon of the antenna, hold the knurled poron and rotate the antenna via the slip joint.

• Aer installing your external antenna, posion the switch on the le side of your OA-50 in the “UP” posion (far le switch in

Diagram 2). You can also nd this switch posion diagram on the boom of your OA-50.

Note: Ensure you use a non-metallic object such as a toothpick to manipulate the switch.

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RS-232 Control and Switch

• There is a 6-pin green terminal block connector with 3 contacts labeled RS232 (#8 on the back panel of Diagram 1) that provide a

connecon for a third-party RS232 control device to be used with the OA-50.

• There is a switch labeled RS232 SWITCH OFF / ON directly to the le of the green terminal block connect-

or. When using a RS232 control device, ensure the RS232 switch is in the ON posion. This will direct the

OA-50 to take commands from the panel. If you are not using a control panel, switch to the OFF posion.

• The RS232 command list is available from TeachLogic

Note: When the RS232 switch is set in the ON posion, front panel volume controls on the OA-50 are

defeated and will not work.

Fire Alarm Mute Input

• The 2-pin orange terminal block connector labeled Fire Alarm Mute Input (#2 on back panel in Diagram 1) provides

a connecon to mute the OA-50. If a connected re alarm system is in alarm mode, this will mute all audio in the

OA-50 amplier. This feature will help lower the overall sound level to allow students and sta hear the audible

re alarm tones and instrucons within the classroom.

Note: The Page Pass Through audio is muted during alarm.

• Audio will resume at original volume 11 seconds aer re alarm input stops receiving a signal. The signal is a dry contact closure.

Note: This feature only works if your school connects their re alarm system to the OA-50.

Security Alert Acvaon and Sengs

• The Security Alert feature allows a user with a TeachLogic wireless pendant microphone to summon help or alert admin-

istraon personnel to an urgent situaon in the room of that user. This feature uses wire from the school’s paging or secu-

rity system (such as a wall-mounted call buon panel) to connect to the OA-50 receiver via the 2 or 3 contacts on the 6-pin

terminal block connector (#9 on the back panel of Diagram 1).

• To acvate the security alert (your OM-10 pendant microphone must be on and connected to your OA-50), push and hold the OM-

10’s AUDIO spring switch for 5 seconds. The OM-10 main (logo) buon will ash green 3x once an alert is acvated. Your OA-50

logo buon will do the same.

Note: The OA-50 will funcon normally during the

ale rt, i.e., there is no change the volume or to

audio input/output. The system will not pro-

duce any sound besides a quiet clicking noise

(1 or 4 mes) from the OA-50 itself.

• There are two security alert pulse modes, 1-pulse or

4-pulse, as required for dierent security systems.

You can switch between the two sengs via the

slide switch on the le side of your OA-50 (center

le switch on Diagram 2) or the boom of your OA-50 for the seng instrucons.

Note: Ensure you use a non-metallic object to manipulate the switch.

Page Mute vs Page Pass Through

• Page Pass Through is a feature that passes an audio paging signal through the amplier and to the connected loudspeakers.

• Page Mute will mute any audio signal passing through the OA-50 (except for a page signal) whenever a page is

detected on the separate paging system.

• Page Pass Though may be switched on or o by moving a side panel switch up or down center right switch in

Diagram 2). This switch posion guide is also located on the boom of your OA-50.

• Page Mute is controlled by a sensivity dial (#4 on the back panel of Diagram 1) and by a switch set to the

Nominal voltage level of the paging system (#5 on the back panel in Diagram 1).

• The impedance of the page system input port (2-pin green terminal block connector) is >50,000 ohms.

Using the OP-10 Control Panel

• If your OA-50 needs to be placed in an area or compartment that is not easily accessed by the user, an OP-10 Wall Mount Control

Panel can be used to allow limited remote controls. These include pairing and un-pairing microphones from an OA-50, turning an

OA-50 On and O, pung the OA-50 into or out of Standby Mode, and radio-reseng the OA-50. Please refer to Diagram 3 in con-

juncon with the instrucons below.

• Lights on the OP-10 indicate pairing and connecon status by duplicang certain illuminaons of the front panel pairing indicators

on the OA-50 (#3 & #5 on the front panel in Diagram 1).

• The indicator light next to the OP-10 power buon mimics that on the OA-50 logo buon showing solid blue (On), slow-blinking

blue (Standby), no light (O), and blinking blue (Radio Reset).

Note: If radio (RIB) reset is occurring all three LED indicator lights (#4, #5, and #6 on Diagram 3) will blink 3x.

• Pressing an OP-10 pair buon has the same eect as pressing a pair buon on the OA-50.

• Pressing the power buon on the OP-10 has the same eect as pressing the logo buon on the OA-50.

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FCC compliance statement:

Contains Transmier Module FCC ID: Y82-DA14AVD / IC ID: 9576A-DA14AVD

This device complies with Part 15 of the FCC Rules.

Operaon is subject to the following two condions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received,

including interference that may cause undesired operaon of the device.

Changes or modicaons to the equipment not expressly approved by the Party responsible for compliance could void the user's authority to operate the equipment.

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to

provide reasonable protecon against harmful interference in a residenal installaon. This equipment generates, uses and can radiate radio frequency energy and, if

not installed and used in accordance with the instrucons, may cause harmful interference to radio communicaons. However, there is no guarantee that interference

will not occur in a parcular installaon. If this equipment does cause harmful interference to radio or television recepon, which can be determined by turning the

equipment o and on, the user is encouraged to try to correct the interference by one or more of the following measures:

—Reorient or relocate the receiving antenna.

—Increase the separaon between the equipment and receiver.

—Connect the equipment into an outlet on a circuit dierent from that to which the receiver is connected.

—Consult the dealer or an experienced radio/TV technician for help.

—Privacy of communicaons may not be ensured when using this device.

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