ARCHITECT’S
SPECIFICATIONS
The handheld vocal radio microphone shall
be for use with a companion receiver as
part of a wireless RF transmission system.
The radio microphone shall operate within
six UHF frequency ranges, each with a 42 MHz
switching bandwidth: 516 – 558 MHz,
566 – 608 MHz, 626 – 668 MHz, 734 –
776 MHz, 780 – 822 MHz, 823 – 865 MHz;
transmission frequencies shall be 1,680 per
range and shall be tunable in 25 kHz steps.
The radio microphone shall feature 20 fixed
frequency banks with up to 24 compatible
frequency presets and 6 user banks with up
to 24 user programmable frequencies.
Nominal/peak deviation shall be ±24 kHz/
±48 kHz. Frequency stability shall be
≤
±15 ppm. RF output power at 50
O
shall
be switchable between 10 mW (Low) and
30 mW (Standard).
The radio microphone shall incorporate the
Sennheiser HDX compander system and a
defeatable pilot tone squelch.
Audio frequency response shall range from
80 –18,000 Hz. Signal-to-noise ratio at 1 mV
and peak deviation shall be
≥
115 dBA.
Total harmonic distortion (THD) shall be
≤
0.9 %. Input sensitivity shall be adjustable
within a 48 dB range in steps of 6 dB.
The radio microphone shall be menu-driven
with a backlit LC display showing the cur-
rent frequency, frequency bank and channel
number, metering of AF level, transmission
status, lock status, pilot tone transmission,
muting function, and battery status. An au-
to-lock feature shall be provided to prevent
settings from being accidentally altered.
The radio microphone parameters shall
either be configurable in the associated
receiver’s menu and synchronized with the
radio microphone via an integrated infrared
interface or shall be programmable in the
radio microphone menu.
Continued on page 3
SKM 300-835 G3, SKM 300-845 G3, SKM 300-865 G3
Handheld vocal radio microphone
TECHNICAL DATA
Modulation ...............................................................wideband FM
Frequency ranges.................................................... 516 – 558, 566 – 608, 626 – 668,
734 –776, 780 – 822, 823 – 865 MHz
Transmission frequencies ..................................... 1,680 frequencies, tuneable
in steps of 25 kHz
20 frequency banks, each with up
to 24 factory preset channels
6 frequency banks, each with up to
24 user programmable channels
Switching bandwidth .............................................42 MHz
Nominal/peak deviation .......................................±24 kHz/±48 kHz
Frequency stability .................................................
≤
±15 ppm
RF output power at 50
O
, switchable ................ typ. 10 mW (Low)
typ. 30 mW (Standard)
Pilot tone squelch ...................................................can be switched off
Compander system .................................................Sennheiser HDX
AF frequency response ..........................................80 –18,000 Hz
Signal-to-noise ratio (1 mV, peak deviation) ...
≥
115 dBA
THD .............................................................................
≤
0.9 %
Adjustment range of input sensitivity ..............48 dB, adjustable in 6-dB steps
Temperature range .................................................−10 °C to +55 °C
Power supply............................................................ 2 AA size batteries, 1.5 V or
BA 2015 accupack
Nominal voltage ......................................................2.4 V
Current consumption:
at nominal voltage .................................................typ. 180 mA (30 mW)
with switched-off radio microphone ..................
≤
25 µA
Operating time ........................................................typ. 8 hrs
Dimensions ............................................................... approx. Ø 50 mm (2“)
x 265 mm (10.4“)
Weight (incl. batteries) .........................................approx. 450 g (15.9 oz)
SKM 300-835 G3
Transducer / microphone type ............................dynamic
AF sensitivity ........................................................... 2.1 mV/Pa
Sound pressure level (SPL) ...................................154 dB(SPL) max.
Pick-up pattern ........................................................cardioid
Continued on page 3
