Williams Sound T800 ユーザーズマニュアル



The T800 FM transmitter will broadcast a speaker's voice, music program, or audio service wirelessly up to 122m
(400ft) to a listening audience. Quick and easy setup: The installer simply connects a microphone with a XLR or
1/4” plug into the unit to broadcast their voice. Alternatively, the unit can connect to a sound system through a
line-level (RCA) jack to broadcast music or other audio service. The T800 features three channels on 863.250,
863.750 or 864.750 MHz.  For simultaneous interpretation, up to three T800 transmitters may be installed in a sin-
gle facility for broadcasting three languages with minimal crosstalk or interference. Audience participants use the
three-channel R863 FM receiver (optional) to pick up the broadcast for language interpretation or hearing assis-
tance applications.

Dimensions:

21.8 cm (8.6”) W x 21.8 cm (8.6”) D x 4.6 cm (1.8”) H

Weight: 

1.32 kg (2.9 lbs)

Color:

Black with white legends

Power:

AC: 100 to 240 VAC, 50-60 Hz, 400 mA, power inlet IEC C14
DC: 12 to 13 VDC, 800 mA, 2.1 mm DC input jack
Power Switch: Push ON - push OFF switch with red light

Temperature Range:

Operating: 0 C to 40 C (+32 F to 104 F)

Storage:

-20 C to 70 C (-4 F to +158 F)

Operating Frequencies:  

Selectable: Ch 1= 863.250 MHz, Ch 2 = 863.750 MHz, Ch 3 = 864.750 MHz,
13 other frequencies available (see manual)

RF Output:

5 to 10 dBm (full power switch) 

RF Switch:     

Low/ Full power switch on rear panel

LCD Display:

Backlit, Ch #, frequency, user name, audio level VU (indicated by 11 segments total)

Menu Push Buttons:

Menu, +Ch select, -Ch select, SET

Headphone Output:

Mono, 1/4” tip barrel jack, 0.35mW power into 33 ohms, level adjust on front  panel

Stability:

+/- .05 MHz (0 C to 40 C)

FM Deviation:

45 kHz (line input, L+R, 1 kHz, 0.5 Vrms)

Pre-Emphasis:

50 µsec

Nominal Range:

Up to122 meters (400 ft) at RF switch full power with Williams Sound R863 receiver 

Frequency Response: 

Line input: 25 to 10.0 kHz +- 3 dB
Microphone input: 110 to 8.5 kHz +/- 3 dB. Dynamic microphone only

Signal/Noise Ratio (1 kHz):

Line input: > 50 dB
Microphone input: > 40 dB

%THD + noise (1 kHz): 

Line input: < 0.4%  
Microphone input: < 0.5%

Audio Processing:

2:1 compression (line or microphone input) 

©2008, Williams Sound Corp.  MCAT 066A

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* 90 days on accessories.