Lectrosonics HMa Manuel utilisateur

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This guide is intended to assist with

initial setup and operation of your

Lectrosonics product.

For a detailed user manual, down-

load the most current

version at:

www.lectrosonics.com/manuals

HMa

Plug-On Transmitter

13 August 2018

Digital Hybrid Wireless®

U.S. Patent 7,225,135

LECTROSONICS, INC.2

LCD Screen

Backlit for easy viewing in bright or dimly lit conditions.

Pwr (power) LED

Indicates power status and battery strength.

XLR Input Jack

Standard 3‑pin Switchcraft XLR type. Coupler is spring‑loaded to maintain a

snug ﬁt and to prevent noise.

Modulation LEDs

Provides a visual indication of the audio input signal level ‑ either red or green

to indicate modulation levels.

AUDIO Button

Used to display the view and adjust the audio gain setting (0 dB to 44 dB).

FREQ Button

Used to set the operating frequency and toggle the LCD between the operating

frequency in MHz and a two‑digit hexadecimal frequency code.

UP/DOWN Arrows

Used to view and select parameters and values during setup and operation.

Battery Compartment Cover

Hinged to housing to prevent loss.

Controls and Functions

Battery

Compartment

Cover

XLR Input

Jack

AUDIO Button

LCD

Input

Coupler

FREQ Button

Modulation

LEDs

PWR LED

UP Arrow

DOWN Arrow

www.lectrosonics.com 3

The transmitter is powered by two AA batteries.

Note: Standard zinc‑carbon batteries marked “heavy-duty” or “long-

lasting” are not adequate.

To install new batteries:

1. Slide open the Battery Cover and remove any old batteries.

2. Insert the new batteries into the housing. One battery goes in positive

(+) end ﬁrst, the other negative (‑) end ﬁrst. Look into the battery com‑

partment to determine which end goes in which side. The side with the

plastic ring is the side which accepts the positive end of the battery.

Note: It is possible to install the batteries backward and close the

battery door, but the batteries will not make contact and the unit will not

work.

3. Slide the Battery Cover until it snaps securely shut.

Battery Installation

Battery

Compartment

Battery

Cover

positive (+)

terminal

negative (–)

terminal

LECTROSONICS, INC.4

Operating Instructions

Powering On in Operating Mode

1) Ensure that good batteries are installed.

2) Simultaneously press and hold the AUDIO

and FREQ buttons as the timer counts from 1

to 3 (about 3 seconds).

Powering Off in Operating Mode

1) Simultaneously press and hold the AUDIO

and FREQ buttons while observing that the

word OFF and the counter in the LCD.

2) When the counter reaches 0, the unit turns

off.

Note: If the AUDIO and FREQ buttons are released before the end of

the countdown, the unit will not turn off.

Powering On/Off in Standby Mode

From the OFF position, quickly press and release

both the AUDIO and FREQ buttons simultaneously

to enter and exit this mode. Adjustments and set‑

tings can be checked or changed, but the unit will

not be transmitting to avoid interfering with other

systems in the vicinity.

Up Button Menu

Hold the UP button wihile powering up the unit. Then press the

AUDIO button repeatedly to scroll through the following settings. Use the UP

and DOWN arrow to select the available options under each setting.

Selecting the Compatibility Mode (Up Button Menu)

CP (Compatibility Mode); press the UP and DOWN

arrows to select one of the following:

Note: RF transmission is prevented while

selecting Compatibility Modes.

• 400 ‑ For Digital Hybrid Wireless®receivers.

• 3 ‑ (Mode 3) For non‑Lectrosonics analog receivers. Contact the

factory for details.

• 200 ‑ For Lectrosonics 200 Series receivers.

• 100 ‑ For Lectrosonics 100 receivers.

• 7 ‑ (Mode 7) For non‑Lectrosonics analog receivers. Contact the

factory for details.

• 6 ‑ (Mode 6) For non‑Lectrosonics analog receivers. Contact the

factory for details.

• IFB ‑ For Lectrosonics IFB receivers.

Initial Power On

Timer Screen

Initial Power Off

Timer Screen

Standby Screen

www.lectrosonics.com 5

RF Power Output (Up Button Menu)

Pr (RF Power output) may be selected as either 100 or 50.

Selecting the Audio Polarity (Up Button Menu)

Pin 2

(+)

Pin 2

(–)

The input to the transmitter can be set for

XLR Pin 2 as positive (+) or negative (–) to

match the polarity of other mics being used.

Selecting Step Size Mode (Up Button Menu)

The frequency increments can be set at either 25 kHz or 100 kHz.

DOWN Button Menu

Hold the DOWN button while powering up the unit. Then press the

AUDIO button repeatedly to scroll through the following settings. Use the UP

and DOWN arrow to select the available options under each setting.

Enable Remote Control

rc on and rc OFF enable and disable remote control functions. See page 7.

Power Back On (DOWN Button Menu)

PbAc (Power back on after power loss) allows the unit to either (1) turn back

on after power loss or (0) remain off.

LCD Backlight Setting (DOWN Button Menu)

The LCD backlight can be set to stay on continuously or turn off after either 5

minutes or 30 seconds

LECTROSONICS, INC.6

Audio Screen Menu

The Audio Screen is used to adjust input gain and

low frequency roll‑off, and to turn phantom power

on and off. Repeatedly pressing the AUDIO button

selects the setting. Press and hold the AUDIO

button and use the UP and DOWN arrows to

adjust the value.

Adjusting the Input Gain (Audio Screen Menu)

The control panel Modulation LEDs indicate the modulation level and limiter

activity. This gain adjustment matches the transmitter gain with the micro‑

phone’s output level, the user’s voice level and the position of the microphone.

Once set, the transmitter’s audio level setting should not be used to control

the volume of your sound system or recorder levels. The audio input level can

be set with the unit in Standby Mode or while powered up in normal operation.

Signal Level -20 LED -10 LED

Less than ‑20 dB Off Off

‑20 dB to ‑10 dB Green Off

‑10 dB to +0 dB Green Green

+0 dB to +10 dB Red Green

Greater than +10 dB Red Red

Note: Voice levels vary signiﬁcantly between different people. If several

different people will be using the transmitter and there is not time to

make the adjustment for each individual, adjust it for the loudest voice.

1) With the HMa powered off, insert the microphone plug into the XLR Input

Jack, aligning the pins and ensuring that the connector locks.

2) Place the transmitter in the Standby Mode, or if the unit is to be powered

up and adjusted, mute the main sound system prior to powering up the

transmitter.

3) Position the microphone in the location where it will be used in actual

operation.

4) Observe the audio level LEDs while speaking or singing into the micro‑

phone at the same voice level that will be used during use. While holding

the AUDIO button, press the UP or DOWN arrows until both the ‑20 and

‑10 LEDs glow green, with the ‑20 LED ﬂickering red on louder peaks.

This will optimize the signal to noise ratio of the system with full modula‑

tion and adequate headroom to prevent overload and audible compres‑

sion of signal peaks.

Note: Setting the audio level too high reduces the dynamic range of the

audio signal. Setting the audio level too low may cause hiss and noise

in the audio.

www.lectrosonics.com 7

5) If the unit was set up in Standby Mode, it will be necessary to turn the

transmitter off, then power it up again in normal operation so the RF

output will be on. Then the other components in the sound or recording

system can be adjusted.

Adjusting the Low Frequency Roll-Off (Audio Screen Menu)

Repeatedly press the AUDIO button until the LF

roll‑off adjustment screen appears. Then press

and hold the AUDIO button while selecting the

desired roll‑off frequency with the UP and DOWN

arrows.

Selecting the Phantom Power Supply (Audio Screen Menu)

The transmitter input jack can provide phantom power for the attached micro‑

phone if needed, with voltages at 5, 15, or 48. Phantom power will consume a

slight amount of battery power, so it can also be turned off. With the transmit‑

ter powered on and in the normal or standby mode, press and hold the audio

button and observe the LCD. Release the button and press and hold it again.

Repeat this process until the display indicates the PH.

Once you get to the PH setting, keep the AUDIO button pressed, then use the

UP and DOWN arrow keys to cycle through the available settings (off, 5, 15,

48 volts) until the desired setting is displayed.

When you release the AUDIO button, the setting will be stored to the value

you selected.

Remote Control Functions (dweedle tones)

Settings can be adjusted with the LectroRM phone app. LectroRM is a

mobile application for iOS and Android operating systems. Its purpose is to

remotely control Lectrosonics transmitters. The available functions are:

• Input Gain

• Lock/Unlock

• Tx power output

• Frequency

• LEDs on/off

• Audio LF roll‑off

The app was released by New Endian, LLC in September 2011. The app is

available for download and sells for $20 on the Apple App Store and Google

Play Store.

LECTROSONICS, INC.8

Setting Transmitter Operating Frequency

1) If the LCD is displaying something other than the Frequency Screen, press

the FREQ button on the Control Panel to enter this screen.

Note: The default display is in MHz. Pressing the FREQ button again

displays the operating frequency as a two‑digit hexadecimal number

that corresponds to legacy Lectrosonics products that used two

16‑position switches to set the frequency.

2) While holding the FREQ button, use the UP or DOWN arrow buttons to

move the operating frequency up or down.

Note: The operating frequency displayed on the LCD wraps as it

reaches the upper or lower end of its range. Thus, if you intend to move

the operating frequency from the lower end of the range to the upper

end, it may be faster to do this by using the DOWN arrow until the

frequency wraps to the upper end.

Set Up in 100 kHz Mode

Frequency displayed

in MHz

Frequency displayed as

two-digit hexadecimal

number

The operating frequency can be displayed either in

MHz or as a two‑digit hexadecimal number. The

example of the two‑digit display shown here

indicates CH (channel) and 2C as the frequency.

The frequency can be set with the unit in standby

mode or when powered up for normal operation.

Set Up in 25kHz Mode

The hexidecimal display in the 25 kHz mode will appear with a decimal sufﬁx

to indicate the 25 kHz steps.

475.875 MHz

490.225 MHz

487.650 MHz

509.200 MHz

www.lectrosonics.com 9

Lock/Unlock Screen

Simultaneously pressing and holding both the UP and DOWN arrow buttons

during normal operation starts the Lock timer. The timer starts at three and

counts down to zero. When the timer reaches zero, the keypad controls are

locked.

The LCD will display the locked condition as long

as the arrow buttons are held, then revert back to

the previous screen when either button is

released.

With the controls locked, the AUDIO and FREQ

buttons can still be used to display current set‑

tings. Any attempt to change a setting by press‑

ing either the UP or DOWN arrow button will

result in an on‑screen Loc reminder that the controls are locked. Remove the

batteries to unlock the control panel.

Important: Once the transmitter is locked, it cannot be unlocked

or powered off using the buttons. The only way to unlock a locked

transmitter is to remove the batteries.

LECTROSONICS, INC.10

Special Purpose Barrel Adapters

Mic adapter for Earthworks M30 microphone with HM, HMa and UH400a/TM

transmitters.

This polarity reversing adapter may be needed to correct for asymmetrical

current draw in some P48 powered condenser microphones, including older

Neumann 100 Series, Rode NTG3 and others. If you microphone does not

power on correctly when used with these transmitters, insert the adapter

between the transmitter and microphone.

P/N 21750

Polarity Reversing

Barrel Adapter

MCA-M30

This adapter may be needed if you are experiencing noise or distortion with

measurement microphones, particularly the Earthworks M30. The adapter has

a common mode choke for suppressing RF noise. If your microphone signal

exhibits the problems listed above when connected to a UH400, HM or HMa

transmitter, insert the adapter between the microphone and the transmitter.

Insert the adapter between the transmitter and microphone to alleviate the

problems listed above.

Barrel Adapter

Earthworks M30

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