Lectrosonics D4 System - Manual (Page 17)

4-channel Digital Wireless System
Rio Rancho, NM, USA 17
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 modifications 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.