Pro Audio MRX-16 User guide

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Page 1

16-CHANNEL

MICRO WIRELESS

SYSTEM

MRX-16 RECEIVER

Instructions for use with any of these transmitters

micro

MGT-16 SYSTEM

MT-16A

MT-16R

micro

MHT-16 SYSTEM

MH-16

micro

LINK-16 SYSTEM

LK-16

WHM-16 SYSTEM

micro

WH-16

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Contents

Introduction ............................................................................. 2

Using this Manual ..................................................................... 2

System Features

microMRX-16/microMHT-16/microLINK-16/microWHM-16 .......... 3

Quick User Controls/Connections Guide ....................................... 4

MRX-16 Wireless Instrument Receiver ..................................... 4

MT-16A/R Instrument Transmitter ........................................... 6

MH-16 Horn Instrument Transmitter ........................................ 7

LK-16 Snap-On Transmitter .................................................... 8

WH-16 Head-Worn Transmitter ............................................... 9

System Operation ..................................................................... 10

MRX-16 Wireless Receiver ...................................................... 10

MT-16A/R, MH-16, LK-16, WH-16 Transmitters ......................................12

Miscellaneous Tips .................................................................... 14

Cautions and Troubleshooting .................................................... 15

MRX-16 System DIP-Switch Frequency Selection Chart .................. 16

Specications ........................................................................... 17

Servicing ................................................................................. 18

Warranty ................................................................................. 19

Introduction

Thank you for choosing the Nady microMGT-16/microMHT-16/ microLINK-16/microWHM-16 Mini Wireless System. Each of these units is a 16-channel, ultra-compact UHF wireless system featuring 16 selectable frequencies, up to 250 feet operating range, and infrared ASC Sync Channel) for quick convenient setup. The miniature receiver can be plugged directly into any amp or mixer.

(Auto

Using This Manual

This booklet provides information regarding the use of the microMGT-16, microMHT-16, microLINK-16 or microWHM-16 Wireless System with the MRX-16 receiver and one of the following transmitters: MT-16A/R, MH-16, LK-16 or WH-16. It includes a description of features and a step-by-step guide to operation of the particular system you have purchased. This manual should answer any questions you may have about the operation and servicing of your

system.

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System Features

MRX-16 Systems

•

UHF wireless system for musical instrument sounding

•

16 user-selectable PLL frequencies for interference-free operation

•

Up to 250’ operating range, line-of-sight

•

ASCTM (Auto Sync Channel) infared wireless download pairs transmitters to selected

receiver frequency for quick, easy setup

• Battery operated receiver and transmitters

MRX-16 Instrument Receiver

•

Compact, portable, “pocket size” receiver

•

Flexible wire ¼ wave antenna

•

Unbalanced ¼” line output plug

• Power On/Off/Mute switch; Volume Control; LED indicators for Low Battery, and RF Reception; DIP-switch channel selection with IR sync to transmitter; IR Sync LED

• Powered by one AA alkaline battery for portability (Up to 8 hours battery life)

Available Transmitters

MT-16A & MT-16R Instrument Transmitters

• Choice of two transmitter housings— MT-16A with 30° angled ¼” plug for use with either recessed or surface mounted jacks, or MT-16R with 90° angled ¼” plug for

surface mounted jacks only

• Up to eight hours of battery life from a single AAA alkaline or NiMH rechargeable

battery

• Infrared channel sync with receiver for instant setup

• Power On/Off switch; Power/Low Battery LED indicators; IR Sync LED

• Input level attenuation switch; internal audio level control trim-pot

• External exible wire antenna

MH-16 Saxophone (Horn) Instrument Transmitter

• Clip-on-the-horn barrel style without any tangling wires

• Up to eight hours of battery life from a single AAA alkaline or NiMH rechargeable battery

• Infrared channel sync with receiver for instant setup

• Power On/Off switch; Power/Low Battery LED indicators; IR Sync LED

• Input level attenuation switch; internal audio level control trim-pot

• External exible wire antenna

LK-16 Snap-On Transmitter

• Female XLR input connector for mounting transmitter on any hardwired dynamic microphone

• Up to eight hours of battery life from a single AAA alkaline or NiMH rechargeable battery

• Infrared channel sync with receiver for instant setup

• Power On/Off switch; Power/Low Battery LED indicators; IR Sync LED

• External exible wire antenna

WH-16 Head-Worn Transmitter

• Head-Worn (over ears style) transmitter for hands free, cordless operation

• Up to eight hours of battery life from a single AAA alkaline or NiMH rechargeable battery

• Infrared channel sync with receiver for instant setup

• Power On/Off switch; Power/Low Battery LED indicators; IR Sync LED

• External exible wire antenna

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Quick User Controls/Connections Guide

MRX-16 Receiver

DIPSWITCH

EXPLODED

VIEW

Page 5

Quick User Controls/Connections Guide

MRX-16 Receiver

1. BATTERY COMPARTMENT COVER Holds one AA battery, slide to open

2. AA BATTERY One required for operation, alkaline or NiMH

3. BATTERY COMPARTMENT Insert one AA battery for operation, note correct polarity

4. AUDIO OUTPUT PLUG For connecting to other sound equipment (amp or mixer) input jack

5. ANTENNA Permanently attached exible antenna

6. RF SIGNAL LED (Green) Indicates the received signal from the transmitter

7. POWER & LOW BATTERY LED (Red) Flashes once at power up,

continuous ashing battery needs replacement

8. ACS™ IR SYNC BUTTON Press to make the IR link download the receiver’s selected frequency to the TX. First, turn on the transmitter (or turn off and then on again if already on) and position its IR window 6-12” away from the RX IR window, press the SYNC button once and wait one second for the RX to respond. If the IR data download is successful, the receiver SIGNAL LED (6) will light indicating the transmitter is locked in and transmitting.

9. CHANNEL SELECT DIP-SWITCH Select one of 16 pre-set channels per MRX-16 DIP-Switch Frequency Selection Chart (see page 16)

10. VOLUME CONTROL Adjusts the audio output level—at maximum

setting the gain will be about +4dB over a direct instrument-to-cord-to-

amp connection

11. POWER SWITCH Select OFF/MUTE/ON (MUTE=power On, audio output highly attenuated)

12. ACS™ IR SYNC INFRARED LED WINDOW For downloading selected Channel (Frequency) to transmitter

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Quick microMGT-16 User Controls/Connections Guide

MT-16A/R Instrument Transmitter

17. POWER SWITCH Slide in arrow direction to power transmitter On

18. 15dB ATTENUATION PAD Select to

reduce the input gain by 15dB for higher level

audio input signals

19. INPUT ¼” PLUG Connect directly intoguitar/bass output jack

20. POWER & LOW BATTERY LED Flashes

once at power up, continuous ashing indicates

battery needs replacement

21. IR RECEPTOR SENSOR/WINDOW Infrared LED sensor for linking the TX to the RX during IR frequency download

22. BATTERY COMPARTMENT Insert one AAA battery, observing correct polarity

23. INTERNAL AUDIO LEVEL ADJUST Remove battery to access slot and adjust internal trim-pot with small screwdriver for optimal input level setting. Note: this is to be

done only in rare cases as factory level setting is already optimized for most guitars and basses and 15dB Pad also available.Note: Set control carefully. If trim-pot is turned past minimum and maximum adjustment points it may need to be backed up to achieve desired setting.

24. ANTENNA Permanently attached exible antenna

25. BATTERY Single AAA alkaline or NiMH battery required for operation

26. BATTERY COMPARTMENT COVER Slide to open

ASC

IR Sync Download of Selected Frequency of MRX-16 Receiver to micro MT-16A/R, micro MH-16, micro LK-16 or micro WH-16 Transmitter

(1) ASC™ IR SYNC INFRARED LED WINDOW

For downloading selected Channel (Frequency) to transmitter

(21, 31, 46, 56) MT-16A/R, MH-16, LK-16, WH-16

TRANSMITTER IR RECEPTOR SENSOR/WINDOW Infrared LED sensor for linking the TX to the RX during IR frequency download.

(14) ASC

™

IR SYNC BUTTON Press to make the IR link

download the receiver’s selected frequency to the TX. First, turn on the system transmitter supplied (or turn off and then on again if already on) and position its IR window 6-12” away from the RX IR window, press the SYNC button once and wait one second for the RX to respond. If the IR data download is successful, the receiver SIGNAL LED (6) will light indicating the transmitter is locked in and transmitting.

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Quick microMHT-16 User Controls/Connections Guide

MH-16 Saxophone (Horn) Instrument Transmitter

28. BATTERY COMPARTMENT COVER To cover AAA battery, slide to open

29. BATTERY Single AAA alkaline or NiMH battery required for operation

30. BATTERY COMPARTMENT Insert one AAA battery, observing correct polarity

31. IR RECEPTOR SENSOR/WINDOW Infrared LED sensor for linking the TX to the RX during IR frequency download (See also ASC

32. POWER & LOW BATTERY LED Flashes once at power up, continuous ashing indicates battery needs replacement

33. ANTENNA Permanently attached exible antenna

34. INTERNAL AUDIO LEVEL ADJUST Remove battery to access slot and adjust internal trim-pot with small screwdriver for optimal input level setting.

Note: This is to be done only in rare cases as factory level setting is already optimized for most horns and 15dB Pad also available.

Note: Set control carefully. If trim-pot is turned past minimum and maximum adjustment points it may need to be backed up to achieve desired setting.

35. POWER SWITCH Slide in arrow direction to power transmitter On

36. 15dB ATTENUATION PAD Select to reduce the input gain by 15dB for higher level audio input signals

37. MOUNTING SCREW To secure the transmitter onto the bell of the horn

38. INPUT MIC For unidirectional pickup of horn’s sound

IR Sync Download section, page 6)

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QUICK microLINK-16 SYSTEM USER CONTROLS/CONNECTIONS

GUIDE

LK-16 Snap-On Transmitter

39. XLR LOCKING CLIP To lock the hardwired microphone securely

40. POWER SWITCH Slide in arrow direction to power transmitter On

41. BATTERY COMPARTMENT COVER To cover AAA battery, slide to open

42. BATTERY Single AAA alkaline or NiMH battery required for operation

43. ANTENNA Permanently attached exible antenna

44. FEMALE XLR PLUG Accepts any hardwire MIC with male XLR connector

45. BATTERY COMPARTMENT Insert one AAA battery, observing correct polarity

46. IR RECEPTOR SENSOR/WINDOW Infrared LED sensor for linking the TX to the RX during IR frequency download (See also ASCTM IR Sync Download section, page 6)

47. POWER & LOW BATTERY LED Flashes once at power up, continuous ashing indicates battery needs replacement

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QUICK microWHM-16 USER CONTROLS/CONNECTORS

GUIDE

WH-16 Head-Worn Transmitter

48. POWER SWITCH Slide in arrow direction to power transmitter On

49. POWER & LOW BATTERY LED Flashes once at power up, continuous ashing indicates battery needs replacement

50. BATTERY COMPARTMENT Insert one AAA battery, observing correct polarity

51. BATTERY Single AAA alkaline or NiMH battery required for operation

52. BATTERY COMPARTMENT COVER To cover AAA battery, slide to open

53. INPUT MIC Unidirectional pickup for vocals

54. FLEXIBLE HEADBAND For mounting over the ears

55. ANTENNA Permanently attached exible antenna

56. IR RECEPTOR SENSOR/WINDOW Infrared LED sensor for linking the TX to the RX during IR frequency download (See also ASCTM IR Sync Download section, page 6)

AAA

Page 10

SYSTEM OPERATION

MRX-16 Receiver

Selecting the MRX-16 Receiver Channel and IR Sync

Antenna

The MRX-16 receiver is supplied with an attached Antenna (5). It should be extended fully to obtain maximum range. For maximum range, it is always best to maintain a line-of-sight (no obstructions) between the receiver antennas and the transmitter whenever possible.

Powering the Receiver

The MRX-16 receiver can operate with either two AA size batteries (DC operation) or with the supplied AC adaptor (AC operation).

For DC operation, open the receiver’s Battery Compartment Door (1) and place a fresh AA Battery (2) in the Battery Compartment (3), observing the correct polarity. A fresh alkaline or NiMH AA battery will generally provide 6-8 hours performance, but in order to ensure optimal performance it is recommended that the batteries be replaced after six hours of use, or as indicated by the Low Battery Indicator (7). As the battery begins to weaken below

usable voltage, the low battery indicator will ash

continuously, warning that the battery is now too low and should be replaced as soon as possible. To preserve battery life, keep the receiver Off when it is not in use.

Turn on the MRX-16 receiver by sliding the Power Switch (11) to the second position (receiver On but audio output muted/ attenuated), or to the third position for normal operation (receiver On and audio un-muted). The Power & Low Battery LED (7) will ash once indicating receiver is operational.

The Frequency Select DIP Switches (9) are used for selecting one of 16

preset frequencies. Simply position the DIP switches to a desired open channel on the receiver. There should be no ickering of the RF Signal LED (6) with the transmitter off. See the MRX-16 DIP- Switch Frequency Selection Chart on page 16 for the correct switch position for each of the 16 available channels. Once you have selected the receiver frequency it can easily be downloaded to the transmitter to establish the necessary RF connection. For further info on selecting open channels, see RF Interference and Finding Open Channels on page 15.

The IR Sync Button (8) on the MRX-16 receiver frequency info from the receiver to the transmitter for quick synchronization prior

to use. Begin programming by holding

the wireless transmitter’s IR Receptor/ Sensor Window (21, 31, 46, 56) about 6-12” from the receiver’s IR Synch Infrared LED Window (12). Press the

IR Sync Button once to begin the IR sync

download of the selected frequency to the transmitter.

Note: To insure proper synchronization, the

transmitter must always be just turned on, or

else turned off then on again, before syncing

is used to transfer the selected

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MT-16A transmitter pictured. Use same procedure with transmitter model supplied with your system

When the RF Signal LED (6) on the receiver lights up, the system frequency is properly synchronized. To change to a different frequency, reset the Frequency Select DIP Switches (9) and sync the transmitter again to the new

selected frequency rst, after turning the

transmitter off and then on again. If no action is taken during the 10 seconds of active data transfer ( i.e., the transmitter is not turned on or properly positioned) the receiver and the transmitter units do not link and transmitter’s previously programmed channel remains unchanged.

Note: Only one transmitter can be used

with one receiver. It is not possible to use two transmitters on the same frequency and mix the output of these transmitters into one wireless receiver.

Note: The IR link is infrared light and works best when this data transfer is accomplished in a light-shielded or darker environment. It may not be successful in a brightly lit area. If the transfer fails, repeat the procedure in a darker location or somehow shield the link from outside light to successfully program the transmitter

with the selected channel info from the receiver.

Connecting Audio Output

The MRX-16 receiver’s Audio Output Plug (4) is a ¼” unbalanced line out and its level is controlled by the Volume Knob (10). Plug into your pedal board or

amplier/mixer as you would with a direct

cord from the instrument or mic. When the

Volume knob is set to maximum receiver

volume setting, the system audio output

is approximately +4dB higher than a

direct instrument (or mic)-to-cord-to-amp connection.

Note: As when making any connection,

make sure the amplier volume control is

set at the minimum level before plugging in the receiver to avoid possible speaker damage.

Your MRX-16 receiver is now operational and ready to use. Once you have completed the above steps, proceed to the following instructions for the transmitter model supplied with your system.

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SYSTEM OPERATION

MT-16A/R, MH-16, LK-16, or WH-16 Transmitter

Note: The transmitter referred to below is one of the following: MT-16A/R, MH-16, LK-16 or WH-16, as provided with your system.

Powering the Transmitter

The transmitter each requires one AAA Battery (25, 29, 42, or 51). To install

the battery, push the locking tabs on the Battery Cover (26, 28, 41, or 52) and push out to expose the Battery Compartment (23, 30, 45, or 50). Insert one fresh AAA battery according to the correct polarity as indicated on the transmitter body. Close the battery cover, ensuring the cover is snapped shut. A fresh AAA alkaline battery generally provides up to 6-8 hours of operation, but in order to ensure optimal performance it is recommended that the battery be replaced after six hours of use or as indicated by the

Low Battery Indicator (21, 32, 47, or

49).

As the batteries weaken, the Low Battery Indicator will ash to warn that the battery

level is too low and should be replaced as soon as possible. To preserve battery life, turn the transmitter off when not in use. To turn the transmitter off, slide the Power Switch in the opposite direction of the arrow.

To turn on the transmitter, slide the Power Switch (17, 35, 40, or 18) in the

direction of the arrow. The Low Battery Indicator will ash once. The unit is now

on and the receiver’s RF Signal LED (6) will light up if the transmitter has been frequency synchronized to the receiver’s selected frequency as per below. To turn it off, slide the power switch opposite direction, and the receiver RF Signal LED (6) should be off.

The transmitters (MT-16A/R, MH-16 only) have a 15dB Pad (18) switch which can be selected to attenuate high output from instrument pick-up levels if needed to reduce distortion through the system. To attenuate, slide the switch in the direction of the arrow. Turning opposite the arrow indication is for standard 1:1 gain operation and is recommended for normal, optimal low-noise operation.

The transmitters (MT-16A/R, MH-16 only) have an internal Audio Level Adjust (24,

34) to set the audio deviation level. It is accessed by inserting a small screwdriver into the slot. Turning this trim-pot counterclockwise reduces overall system audio output (thus lowering distortion but raising background noise), while turning clockwise increases overall system audio output (thus lowering background noise but raising distortion). The Audio Level Adjust is factory set to the mid position, which is the optimal setting for normal operation.

Note: The Audio Level Adjust is not intended for high-input signal adjustment— the 15dB pad is provided for that purpose. It is for use only in extreme cases during which satisfactory audio cannot be achieved with the pad alone.

Note: Set control carefully. If trim-pot is turned past minimum or maximum adjustment points, it may need to be backed up to achieve desired setting.

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The transmitters (LK-16 and WH-16)

have a xed input level. The Audio

Level is factory set to the optimal setting for normal operation. The audio levels should be obtained via the receiver volume control only. (See Connecting Audio Output section on page 11).

Programming The Transmitter to the Selected Channel

Before beginning operation, the

transmitter must be synchronized with the selected frequency from the receiver using the IR Receptor/ Sensor Window (22, 31, 46 or 56) on the transmitter and the IR Sync Window (12) on the receiver (see

Selecting the MRX-16 Receiver Channel and IR Sync on page 10).

After rst turning the transmitter on

(or off and then on again if already on), begin programming by holding the transmitter’s IR Receptor/ Sensor Window about 6-12” from the receiver’s IR Synch Window. Press the IR Sync Button (8) on the receiver once to begin the IR sync download of the selected frequency to the transmitter. Upon successful data transfer (usually in less than two seconds) the transmitter will transmit a radio signal on the same channel (frequency) as the receiver. The Signal LED (6) on the receiver will light up, indicating that the link is completed. If all the necessary steps noted above are not taken during the 10 seconds of active data transfer, the receiver and the transmitter units will not link and the transmitter’s previously programmed channel remains unchanged.

Operating the Transmitter

(MT-16A/R, MH-16, LK-16, or WH-16)

During normal operation with the unit powered on, the MT-16A/R transmitter should be fully inserted into the instrument (guitar, bass, etc.), or the MH-16 attached to the sax, or the LK-16 attached to the hard-wired mic or the WH-16 placed on the head. When ready to play, slide the Power Switch (17, 35, 40, or 48) to ON position in the direction of the arrow. The receiver Signal LED (6) should light up if system is properly synchronized. Adjust the volume on the receiver (see Connecting Audio Output on page 11) for unity gain (one-to- one) with a hardwired cord. Or, (MT-16A/R, MH-16 only)

select up to an added 4-5dB boost by

adjusting the receiver volume to maximum for normal use with guitars and bass guitars. A listening test prior to use will determine which receiver volume and transmitter input pad settings are best for your application. To mute/un-mute (attenuate) the audio during use, set the receiver power switch to the second (Mute) position. Or, just turn off the transmitter with the power switch. The signal LED will turn off and the audio will be muted (Off). When ready to play again, slide the receiver’s power switch to the third (On) position. Or, just turn on the transmitter.

When programming is nished,

close the battery compartment door, ensuring that it latches. The transmitter is now ready for use.

Note: Manually matching the transmitter frequency without the receiver is not possible. For proper operation, the transmitter must have the same channel as selected on the receiver. Only one transmitter can be IR synced and work with one receiver, but one transmitter can work with many receivers.

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Miscellaneous Tips

• The receiver antennas should be kept away from any metal surfaces whenever possible as they can reect away or shield the incoming RF signal.

• When inserting batteries, make sure they are inserted with the correct polarity.

• Before operation, conrm that the receiver and associated transmitter are

tuned to the same frequency/channel.

• After making a receiver channel change, make sure that the corresponding

change is also made on the matching transmitter.

• Use only fresh alkaline or fully charged NiMH batteries. Do not use “general

purpose” carbon batteries. When batteries are weak, replace all of them at the same time. Do not mix new and old batteries, or different types of batteries.

• Position the receiver so it has the least possible obstructions between it and

the transmitter. Line-of-sight is best.

• During operation, the transmitter and receiver should be as close as possible to

each other for optimal results.

• A receiver cannot receive signals from two or more transmitters

simultaneously.

• Turn the transmitter off when it is not in use. For longest life, remove the

batteries if the unit is not going to be used for a long period of time as the transmitters draw a tiny residual current even when off in order to maintain the programmed settings. Also, since batteries installed for a long time can sometimes corrode and/or leak, causing damage, it is generally recommended that batteries be removed whenever the transmitters are not being used.

• When using the MT-16A/R with guitars and basses: Scratchy noises can

sometime occur when electric guitars with dirty pots or connections are used with a wireless system. If you hear scratchy noises, we suggest these steps to eliminate them:

1. Make sure all guitar volume and tone pots are clean and all contacts are solid. This is very important.

2. Solder a 47pF capacitor across the pot to ground terminal of the

guitar’s volume and tone pots — this will provide extra ltering.

Page 15

Cautions and Troubleshooting

Low or no audio

If you are not getting audio through the system, carefully re-check all setups. Especially note that the receiver and transmitter must be set to operate on the same RF channel. Make sure that the Power Switch (11) on the MRX-16 receiver is not in the second position (audio muted/attenuated). The receiver’s Audio Output (4) is adjustable, so make sure the Volume Control (10) is set properly.

RF Interference and Finding Open Channels

If you receive interference on a selected channel with the transmitter off, you must reprogram the receiver and transmitter to a different channel.

To reprogram, you must rst nd an open channel. To do this, follow the operating

procedure outlined in Selecting the MRX-16 Receiver Channel and IR Sync on page

10. With the transmitter off, change the receiver DIP Switches (9) setting to one of

the 16 channels until you nd one for which the Signal LED (6) doesn’t icker or light up. Also, for optimal interference-free operation, the Signal LED must not icker or

light up on any of the three immediately adjacent channels, both above and below the

selected channel (i.e., a eld of seven adjacent channels, with the chosen channel in

the middle, should all be clear). If operating multiple MRX-16 systems simultaneously, repeat this procedure every time a new channel is selected, with all other transmitters and receivers turned on.

It is important to note that wireless frequencies are shared with other radio services. According to current FCC regulations, wireless microphone operation is not protected from interference from other licensed operations in the band. If any interference is received by a government or non-government operation and wireless microphone use is deemed responsible for the interference, the wireless microphone must cease operation or change frequencies. Note: This requirement is applicable in the U.S. only.

Note: If the Signal LED is lit, this indicates good signal strength in operation. If the Signal LED remains lit with the transmitter off, this indicates the presence of likely RF interfering signals at that location. Should this occur, select a different channel.

Consumer Alert

Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone system without a license is subject to certain restrictions: the system

may not cause harmful interference; it must operate at a low power level (not in excess of 50mW);

and it has no protection from interference received from any other device. Purchasers should also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules are subject to change. For more information, call the FCC at 1-888-CALL-FCC (TTY: 1-888-TELL-FCC) or visit www.fcc.gov/ cgb/consumerfacts/wirelessmic_factsheet.html.

Page 16

MRX-16 DIP-Switch Frequency Selection Chart

Frequency Plan: 902.4MHz-923.7MHz (16 Channels) U.S.

Page 17

SPECIFICATIONS

MRX-16 System

Frequency Response 50Hz–16kHz (-3dB) Dynamic Range 120dB

Oscillating System Phase Lock Loop (PLL) Total Harmonic Distortion (THD) <0.8% RF Carrier Frequency Range 902.40MHz–923.70MHz Modulation FM (F3E), +/-30KHz normal Operating Range Up to 250 feet (typical, depending on site conditions)

MRX-16 Receiver Controls Audio Level, Power ON/MUTE/OFF Frequency Select DIP-switches, ASCTM IR sync button Connectors Unbalanced ¼”, DC Adapter input jack LED Indicators LED, IR Sync LED Antenna ¼ wave, permanently attached

Signal-to-Noise Ratio > 105dB (w/AC/DC power supply) Receiver Sensitivity -110dBm nominal, 12dB SINAD Squelch Sensitivity -95dBm (normal) Output Impedance 2.0KΩ Power Consumption DC: 1.5V.95mA Battery One AA alkaline or NiMH Battery Life Up to 8 hours

Dimensions 2.4” W x 4.7” D x 0.9” H (6.1 cm x 12.0 cm x 2.3 cm) Weight (w/o batteries) 2.3 oz (65.2g)