Lectrosonics SMV-941 Series Manual de usuario

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Guide

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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

SMV-941 Series Transmitters

SMV-941 SMQV-941

30 November 2018

Digital Hybrid Wireless®US Patent 7,225,135

For FCC Part 74 licensed operators

LECTROSONICS, INC.2

Controls and Functions

Battery

Compartment

Thumb Screw

Battery

Compartment

Cover Plate

Audio

Input Jack

AUDIO Button FREQ Button

Modulation

LEDs

PWR LED

UP Arrow

DOWN Arrow

Antenna

Jack

LCD

LCD Screen

The LCD is a numeric-type Liquid Crystal Display with screens for adjusting

power, frequency, audio level and low frequency audio roll-off. The transmit-

ter can be powered up with or without the RF output turned on. A countdown

appears in the LCD when powering on and off, allowing the transmitter to be

turned on without RF for adjustments, and to prevent accidentally turning it off

with momentary button presses.

Power LED

The PWR LED glows green when the battery is good. The color changes to

red at a midpoint of the runtime as the battery voltage drops. When the LED

begins to blink red, there is usually less than 30 minutes remaining with a

lithium battery.

The exact point at which the LED turns red will vary with battery brand and

condition, temperature, and the output power setting. The LED is intended to

simply catch your attention, not to be an exact indicator of remaining time. The

illustration below depicts typical behavior with a lithium battery in the single

battery model at 50 mW.

1.6

1.4

1.2

1.0

2468

Hours

Voltage

Varies

Green Red Blink

A weak battery will sometimes cause the PWR LED to glow green immediate-

ly after the transmitter is turned on, but will soon discharge to the point where

the LED will turn red or the unit will turn off completely.

www.lectrosonics.com 3

Power LED Off Feature

In normal operating mode, the UP and DOWN arrow buttons may be used to

turn the PWR LED indicators off and on. This setting does not persist through

a power cycle nor does it affect the LCD backlight.

Audio Input Jack

The Servo Bias input circuitry accommodates virtually every lavaliere, hand-

held or shotgun microphone available, plus line level signals.

Battery Compartment and Thumb Screw

The large knurled thumbscrew is used to release or secure the Battery Com-

partment Cover Plate.

Modulation LEDs

Proper input gain adjustment is critical to ensure the best audio quality. Two

bicolor LEDs will glow either red or green to accurately indicate modulation

levels. The input circuitry includes a wide range DSP controlled limiter to pre-

vent distortion at high input levels.

It is important to set the gain (audio level) high enough to achieve full modu-

lation during louder peaks in the audio. The limiter can handle over 30 dB of

level above full modulation, so with an optimum setting, the LEDs will ﬂash red

during use. If the LEDs never ﬂash red, the gain is too low. In the table below,

+0 dB indicates full modulation (-20 LED just turns red).

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

AUDIO and FREQ Buttons

The AUDIO button is used to display the audio level and low frequency roll-off

settings. The UP and DOWN arrow buttons adjust the values.

The FREQ Button displays the selected operating frequency and toggles the

LCD between displaying the actual operating frequency in MHz and a two-

digit hexadecimal number that corresponds to the equivalent frequency switch

setting on legacy transmitters.

Pressing both buttons simultaneously enters the standby mode and turns the

unit on and off

UP/DOWN Arrow Buttons

The UP and DOWN arrow buttons are used to select the values on the vari-

ous setup screens and to lock out the control panel.

Antenna

The transmitter uses a whip antenna with a ﬂexible woven, galvanized steel

mesh cable and a standard SMA connector.

LECTROSONICS, INC.4

Battery and Battery Eliminator Installation

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

lasting” are not adequate.

The battery status circuitry is designed for the voltage drop over the life of

lithium batteries.

To install new batteries:

1. Turn the battery cover plate thumbscrew counterclockwise a few turns

until the door will rotate.

2. Insert the new batteries into the housing. Polarity is marked on the back

of the housing.

3. Align the battery cover plate and tighten the battery cover plate thumb-

screw.

Two battery

compartments

(SMQV)

Gore-Tex® covered vent

Polarity engraved

into housing

Do Not Cover Vent

Cover plate

thumbscrew

To install the battery eliminator, loosen the

thumbscrew completely and remove the battery door. Insert the battery

eliminator and tighten the thumbscrew.

Install plastic cap

on dual battery

model to cover

the open battery

compartment.

www.lectrosonics.com 5

Attaching and Removing the Microphone

The ﬂexible sleeve over the 5-pin plug on the microphone helps prevent dust

and moisture from getting into the input jack, and provides additional strain

relief. The ﬂange around the rim of the connector on the transmitter creates a

splash proof connection and keeps the sleeve securely attached.

The following procedure simpliﬁes the attachment and removal of the micro-

phone to assure the sleeve is seated securely.

Align the latch on the plug and jack and insert the connector. It is easier to

attach the microphone when the sleeve is pulled back as shown in the Step 3

photo below.

1If the sleeve is pulled down and covering

the connector, squeeze the end of the

sleeve so you can feel the connector inside

and press it into the jack until it latches.

Pinch and

squeeze the

sleeve on this end

to work it down

over the ﬂange.

2Pinch and squeeze the sleeve near the

ﬂange and work it down with a kneading

motion over the ﬂange all the way around

until it stays in place ﬂush with the housing.

Pull on the connector to make sure it is

ﬁrmly latched.

Release button To remove the connector, pull the sleeve

back to expose the black release button.

Press the button to unlatch the plug.

LECTROSONICS, INC.6

Operating Instructions

Power Up and Boot Sequence

1) Ensure that good batteries are installed in the unit.

2) Simultaneously press and hold the AUDIO and FREQ buttons until the

power on boot sequence is initiated.

The count will progress from 1 through 3 and the

unit will then power up with the RF output turned

on. During this turn on sequence, the modulation

and power LEDs all glow red, then green, and then

revert to normal operation. If the buttons are released before the count is

complete, the unit will boot up into the standby mode (see below).

The LCD displays the following information during the boot sequence:

Company Name: LECtro

Frequency Block and

Firmware Version (rX.X):

941r1.1 (typical)

Compatibility Mode: CP nHb (typical)

Power Level Pr 100 (as set)

Audio: Aud 22 (as set)

Power Down

Initial Power Off

Timer Screen

1) Simultaneously press and hold the AUDIO and FREQ buttons while ob-

serving that the word “Off” appears in the LCD along with a counter.

2) When the counter reaches “0”, the unit turns off.

Note: If the AUDIO and FREQ buttons are released before the LCD

goes blank at the end of the countdown, the unit will not turn off.

Instead, it will stay energized and the display will return to the previous

screen.

Standby Mode

Standby Screen

With the power turned off, pressing the AUDIO

and FREQ buttons brieﬂy places the unit in

Standby Mode.

In this mode the RF output is turned off so all

setup adjustments can be made without interfering with other systems operat-

ing in the same location. The screen displays “rf OFF” to remind the user that

the unit is not transmitting.

While the unit is in the standby mode, access the setup screens using the

AUDIO and FREQ buttons and make adjustments using the UP and DOWN

arrows.

www.lectrosonics.com 7

Menus

Setup is accomplished using menus and setup screens accessed by holding

the UP and DOWN arrow buttons at turn on, and by pressing the AUDIO and

FREQ buttons when the unit is turned on.

Hold UP arrow at turn on.

Hold the UP arrow button in while pressing both AUDIO and FREQ buttons to

access the setup screens below. It’s easier if you lay the unit on a ﬂat surface

and use two hands to press all three buttons at the same time. After the ﬁrst

screen loads, press the AUDIO button repeatedly to switch between the set-

tings. Press the UP and DOWN arrow buttons for the desired selection.

After the settings are made, press both AUDIO and FREQ buttons together to

exit and turn the power off.

CP (compatibility modes)

Allows the transmitter to be used with 941 Series receivers or IFB systems in

the 941 MHz band.

nHb new hybrid mode (ETSI compliant)

IFb Lectrosonics IFB systems

NOTE: The nHb compatibility mode is the same as the NU HYBR

mode in the SRc-941 receiver.

Pr (power output)

Can be set at 100 for slightly increased range or at 50 for longer battery life.

50 50 mW output and longer battery life when

maximum range is not necessary

100 100 mW for slightly increased range

NOTE: See battery life table in the speciﬁcations

bL (backlight settings)

Adjusts how long the LCD stays lit after pressing buttons.

55 minutes

30 30 seconds

on Stays on

StP (Frequency step size)

Sets the increments of frequency adjustment.

100 100 kHz steps

25 25 kHz steps

LECTROSONICS, INC.8

Hold DOWN arrow at turn on.

Hold the DOWN arrow button in while pressing both AUDIO and FREQ but-

tons to access the setup screens below. It’s easier if you lay the unit on a ﬂat

surface and use two hands to press all three buttons at the same time. After

the ﬁrst screen loads, press the AUDIO button repeatedly to switch between

the settings. Press the UP and DOWN arrow buttons for the desired selection.

After the settings are made, press both AUDIO and FREQ buttons together to

exit and turn the power off.

rc (remote control with mobile app)

Allows the transmitter to respond to remote control “dweedle” tones from a

mobile device, or from tones generated by the Lectrosonics RM and RM2

devices.

on Enables the remote function.

oFF Disables the remote function.

NOTE: See page 10 for details

PbAc (auto power restore)

Sets the transmitter to automatically turn back on and return to the previous

state after a battery change or power interruption when it is in the operating

mode. This is convenient when the transmitter is powered by an external

source.

1 Restores power automatically

0 Does not restore power automatically

AUDIO Button

When the unit is turned on in either the Standby or Operating Mode, pressing

the AUDIO button repeatedly switches between the available settings.

• LF (XX) adjusts the low frequency roll-off of the audio signal.

• AUD (XX) adjusts the input gain

LF (XX) - Adjusting the Low Frequency Roll-off

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.

The roll-off frequency can be set to 35, 50, 70, 100, 120 and 150 Hz.

www.lectrosonics.com 9

AUD (XX) - Adjusting Audio Level (Gain)

The control panel modulation LEDs marked -10 and -20 indicate the audio

level and limiter activity. Once adjusted according to the following procedure,

the transmitter’s audio level setting should not be used to control the volume

of your sound system or recorder levels. This gain adjustment matches the

transmitter gain with the microphone’s output level, the user’s voice level and

the position of the microphone. The audio input level (gain) should be adjusted

with the unit in the Standby Mode while observing the LEDs.

It is generally best to set the LF roll-off before adjusting the gain, since low

frequency energy can affect the input level to the transmitter.

It is desirable to to set the gain so that some limiting occurs on louder peaks.

The limiter is very transparent over a 43 dB range, and its effect is not audible

until the system is close to overload. In other words, don’t be shy about turn-

ing up the gain.

It is actually a good idea to turn the gain up to maximum and listen for distor-

tion or compression to get a feel for how much headroom is available.

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: 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 transmitter in the Standby Mode, plug in the microphone and

make sure the connector is ﬁrmly seated.

Warning: If the wireless system is powered up while connected

to a live sound system, be careful to turn the sound system level

down ﬁrst or severe feedback can occur.

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

operation.

3) Observe the modulation LEDs while speaking or singing into the micro-

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

holding the AUDIO button, press the UP or DOWN arrow buttons until

the both the -20 and -10 LEDs glow green, with the -20 LED ﬂickering

red during louder peaks in the audio. This will maximize the signal to

noise ratio of the system with full modulation.

4) 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.

LECTROSONICS, INC.10

FREQ Button

The operating frequency can be adjusted according to the frequency in MHz

or a two-digit hexadecimal code. Press the button repeatedly to switch be-

tween the two displays. The display switches when the button is ﬁrst pushed;

push and hold the button in the desired mode and use the UP and DOWN

arrow buttons to make the adjustment.

In this example, the same frequency is displayed in MHz and the equivalent

hex code.

The hex code is a hexadecimal sequence that progresses upward from lowest

to highest frequency using the numerals and letters from 0 through F. When

the frequency is on a 100 kHz step, the hex code is only two digits, as shown

above, which is easy to remember. When the step size is set to 25 kHz, addi-

tional characters are used to denote the exact frequency with four characters.

Locking/Unlocking the Control Panel

Simultaneously pressing and holding both the UP

and DOWN arrow buttons during normal opera-

tion starts the Lock timer. The timer starts at three

and counts down to zero.

When the timer reaches zero, the buttons on the

control panel are locked.

With the controls locked, the AUDIO and FREQ buttons can still be used to

display current settings. Any attempt to change a setting by pressing 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 ways to unlock a locked

transmitter are to remove the battery or unlock it via the RM remote

control.

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