Product Specification
PRODUCT SPECIFICATION
SpeechLine Digital Wireless
SL Handheld DW
2/3
DIMENSIONS
ARCHITECT‘S SPECIFICATION
The handheld transmitter shall be for use with a compan-
ion receiver as part of a wireless RF transmission system
and shall operate in the license-free 1.9 GHz band (fre-
quency ranges shall be from 1,880 to 1,930 MHz, depend-
ing on country-specific regulations).
The transmitter shall be equipped with a mute switch
(deactivatable via the receiver’s user interface) and shall
feature an LC display showing the name of the wireless
link, battery status, RF output power, and reception quality.
The AF frequency response shall range from 50 –
20,000 Hz. The dynamic range shall be > 120 dB(A). Total
harmonic distortion (THD) at 1 kHz shall be typical 0.1 %.
Signal-to-noise ratio shall be > 90 dB(A). RF output power
shall be adaptive and up to 250 mW (country-specific). The
transmitter shall have automatic sensitivity adjustment.
The transmitter shall be powered by either one Sennheiser
Lithium-Ion rechargeable accupack with a typical oper-
ating time of 15 hours or with an optional battery case for
two 1.5 V AA size batteries.
Dimensions shall be approximately 40 mm (1.57") in diame-
ter and 215 mm (8.46") in length. Weight (with microphone
head, without accupack) shall be approximately 262 grams
(9.24 oz). Operating temperature shall range from -10 °C to
+55 °C (+14 °F to +131 °F).
The handheld transmitter shall be the Sennheiser
SL Handheld DW.
The microphone head suitable for use with the handheld
transmitter shall be a condenser type with a super-cardi-
oid pick-up pattern and a sensitivity of 1.6 mV/Pa. Maxi-
mum sound pressure level shall be 152 dB SPL.
The microphone head shall be the Sennheiser MME 865-1.