Lectrosonics D4 System Instrukcja Użytkownika Pobierz pdf (Strona 17)

4-channel Digital Wireless System

Rio Rancho, NM, USA

FCC Notice

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 protection against

harmful interference in a residential installation. The

equipment generates, uses and can radiate radio

frequency energy and, if not installed and used in

accordance with the instructions, may cause harmful

interference to radio communications. However, there

is no guarantee that interference will not occur in a

particular installation. If this equipment does cause

harmful interference to radio or television reception,

which can be determined by turning the equipment

off 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separationbetweentheequipment

and receiver

• Connecttheequipmentintoanoutletonacircuit

different from that which the receiver is connected

• Consultthedealeroranexperiencedradio/TV

technician for help

Changesormodicationstothisequipmentnotex-

presslyapprovedbyLectrosonics,Inc.couldvoidthe

user’s authority to operate it.

Industry Canada Notices:

Operationofthisdeviceissubjecttothefollowingtwo

conditions: (1) this device may not cause interference,

and (2) this device must accept interference, including

interference that may cause undesired operation of the

device.

This device has been designed to operate with the

antenna listed below, and having a maximum gain of 6

dB. Antennas not included in this list or having a gain

greater than 6 dB are strictly prohibited for use with

thisdevice.Therequiredantennaimpedanceis50

ohms.

Lectrosonics P/N: AMJR-915

To reduce potential radio interference to other users,

the antenna type and its gain should be so chosen that

the equivalent isotropically radiated power (e.i.r.p.) is

not more than that permitted for successful communi-

cation.

Speciﬁcations

Overall System

Operating Spectrum: 902 - 928 MHz

Center Frequencies (MHz):

4-channel Mode: 907.776, 912.384, 916.992, 923.904

Four 4-channel systems can operate simultaneously

for a total of 16 audio channels.

Center Frequencies: (MHz):

2-channel Mode: 906.624, 908.928, 911.232, 913.536, 915.840,

918.144, 922.752, 925.056

Eight 2-channel systems can operate simultaneously

for a total of 16 audio channels

Modulation Type: Differential QPSK with Forward Error Correction,

spread spectrum

Occupied Bandwidth: 4 MHz (4-channel mode), 2 MHz (2-channel mode)

Audio Sampling: 48 kHz, 24-bit

Latency (overall system):

Digital In/Digital Out: Less than 0.5 mS

Analog In/Analog Out: 1.0 mS

Selectable Audio Channels: • 4 digital

• 2 digital, 2 analog

• 4 analog

Audio Performance (overall system):

Frequency Response: 20 Hz - 20 kHz, +/– 0.5 dB

THD+N: < 0.05% (1 kHz @ –10 dBFS)

Dynamic Range: > 104 dB A-weighted

Adjacent Channel Isolation: > 93 dB

D4T Transmitter

Power output: 200 mW

Audio Input: Simulated transformer balanced inputs,

clip level adjustable +0 to +20 dBu

(or AES/EBU digital standard)

Power requirements: 9 - 16 VDC

Power consumption: • 675 mA at 9 VDC

• 495 mA at 12 VDC

• 390 mA at 15 VDC

Dimensions: 4 x 4 x 1.5 inches

Weight: 339 grams; 12 ounces

D4R Receiver

Diversity Type: Dual receivers with artifact-free digital combining

Audio Output: Electronically balanced outputs,

max. level adjustable –20 to +8 dBu

(or AES/EBU digital standard)

Power requirements: 9 - 16 VDC

Power consumption: • 306 mA at 9 VDC

• 233 mA at 12 VDC

• 195 mA at 15 VDC

Dimensions: 4 x 4 x 1.5 inches

Weight: 346 grams; 12.2 ozs.

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