574 Chapter 16
reducing pops and bursts from certain consonant sounds
in speech.
16.12.1.3 Sabine Phantom Mic Rider Series 1
The series 1 Mic Rider includes Sabine’s patented FBX
Feedback Exterminator for maximizing gain before
feedback plus the automatic gain control, proximity
effect control, and plosive control. A nonadjustable IR
gate is also included.
The Phantom Mic Rider works with 48 Vdc phantom
power sources that conform to industry standards (DIN
standard 45 596 or IEC standard 268-15A). Devices that
do not conform can be modified to meet the standard, or
external phantom power supplies can be used.
16.12.1.4 Lectrosonics UH400A Plug-On Transmitter
The design of this transmitter was introduced in 1988, in
a VHF version aimed at broadcast ENG applications at a
time when production crews were being downsized.
Converting the popular dynamic microphones of the day
to wireless operation eliminated the cable, which was
very useful for the two-person production crews that had
evolved. During the 20 years that followed, the design
continued to evolve to address an ever-increasing
variety of applications. The addition of selectable bias
voltage allowed the transmitter to power electret micro-
phones. The move to UHF frequencies and a dual-band
compandor increased operating range and audio quality.
Modifications to the design continued through the
present day, leading to the current DSP-based model
available in two versions for use with all types of micro-
phones and modest line level signal sources.
The UH400A model has a 12 dB/octave
low-frequency roll-off down 3 dB at 70 Hz. The
UH400TM model offers an extended low frequency
response down 3 dB at 35 Hz, Fig. 16-158. Fig.16-159
is the block diagram of the transmitter.The most common applications of this transmitter are
eliminating the cable between a microphone and a sound
or recording system. A prime example is acoustic anal-
ysis in a large auditorium or stadium where measure-
ments must be made at multiple locations around the
sound system coverage area and extremely long cable
runs are not practical. In this case, the wireless not only
speeds up the process of making measurements, but it
also allows more measurements to be taken, which can
improve the final sound system performance.
Digital Hybrid Wireless™ is a patented process that
combines a 24 bit digital audio stream with wide devia-
tion FM (U.S. Patent 7,225,135). The process elimi-Figure 16-156. The Sabine Inline Mic Rider. Courtesy
Sabine, Inc.
Figure 16-157. The Sabine gooseneck Mic Rider with
built-in IR sensor. Courtesy Sabine, Inc.
Sabine Mic RiderFigure 16-158. Lectrosonics UH400A plug-on transmitter.
Courtesy Lectrosonics, Inc.