AKG Acoustics HT 4000 - Manual

Features
• Wideband UHF handheld transmitters
with interchangeable acoustics
Wideband UHF pocket transmitters
with die-cast metal housings
• Pre-matched, optimized frequency
groups for quick, easy frequency
selection (Presets)
• Backlit LCD Displays for easy status
monitoring
• Simple, fool-proof setup procedure
using Jog element for quick navigation
• Integrated charging contacts for
convenient recharging of optional
battery pack
• Continuous operation of >15 hrs. with
2 x AA alkaline batteries or > 12 hrs.
with optional BP 4000 rechargeable
battery pack
• Up to 24 intermodulation-free preset
groups available on each frequency
band
• Wide range of optional accessories
available for system customization
HT 4000 / PT 4000
Description
The AKG PT 4000 bodypack and HT 4000 handheld transmitters have identical
transmission characteristics, with a maximum radiated output power of 50 milliwatts.
Through special signal companding circuits (compression and expansion), dynamic
range capability greater than 120 dB is delivered at the receiver’s output. Audio
bandwidth of the system is uniform from 35 Hz to 20 kHz. The
usable distances between the receiver and transmitter can be
100 meters (330 ft) or more. Individual handheld microphone
and bodypack transmitters are factory-matched to each
receiver. Each system operates on a 30 MHz-wide UHF channel
and includes a set of Presets containing Intermodulation Free
frequencies as well as a search tuning mode with access to
up to 1,200 switchable frequencies. In the U. S., a total of
three bands of 30 MHz channels may be selected. The user
may expect a maximum of approximately 50 usable channels
in a given locale (depending on the local TV channels and wireless
frequencies used). In addition to the modulated audio signal, the
transmitters send out a data-encrypted PilotTone (at 32,768 Hz)
to send important information such as battery status, mute status
and more to the system´s receiver.
The HT 4000 handheld and PT 4000 bodypack transmitters can
be powered by 2 AA batteries and normal battery life of up to 15
hours can be expected from standard 1.5-volt alkaline cells. An
optional BP 4000 rechargeable battery pack is available, featuring
Smart Battery Management System Software, and can provide
battery life of up to 12 hours plus the remaining battery life can
be monitored on the transmitter's & receiver's displays.
Both transmitters come with a backlit display and a jog element
for easy setup and full status control. The display features
information on selected frequency, gain setting, and remaining
battery life in hrs. as well as LOCK and MUTE status. Beside the
display and the jog element, the controls on the HT 4000 &
PT4000 include lockable ON/OFF button and a separate MUTE
switch whose position is easily distinguishable as well as a status
indication LED. An inscribable color code facility helps easy
channel recognition in multi-channel systems.
The PT 4000 bodypack accepts both microphone and line-level
input signals, and the input sensitivity can be adjusted from 0 –
25 dB for optimum gain matching. The antenna is a quarter-
wavelength type that affords easy concealment and comfortable
wearing. A lockable TA-3F Mini-XLR connector is available for easy
connection of a broad range of AKG headset, lavalier or instrument
mics (e.g. MicroMic Series microphones) as well as instrument
cables. The PT 4000 also comes with a 2.5-mm jack connector
suitable for the optional RemoteMuteSwitch device RMS 4000.
The HT 4000 handheld transmitter comes with a rugged mechanical
solution for interchangeable microphone modules. Six of AKG’s most popular
handheld "vocal" microphone head units are available for the handheld
transmitter model. The microphones are the dynamic models D 880
WL1, D 3700WL 1, D 3800 WL 1 as well as the condenser models
C 900 WL1, C 5900 WL 1, and C 535 WL 1.
Battery Status Auto Gain Preset Frequencies