Lectrosonics H187 User Manual download pdf (Page 7)

Plug-On Transmitter

Rio Rancho, NM 7

SWING OPEN

RELEASE

DOOR

OBSERVE

POLARITY

Battery Replacement

The H187 transmitter is powered by a standard alkaline

9 Volt battery. It is important that you use ONLY an

ALKALINE battery for longest life. Standard zinc-

carbon batteries marked “heavy duty” or “long-lasting”

are not adequate. They will provide only about 4 hours

of operation. Similarly, nicad rechargeable batteries

only give 4 hours of operation, and will also run down

quite abruptly. Alkaline batteries provide about 15

hours of operation.

To open the battery compartment, press outward on the

cover door in the direction of the arrow as shown in the

Specifications and Features

drawing. Only slight, sliding pressure is needed to open

and close the battery door.

Swing the door open and take note of the polarity

marked inside showing the location of the positive (+)

and negative (-) terminals. Insert the battery and close

the cover by pressing in and across, reversing the

opening procedure outlined above. Note that the

battery door will NOT close if the battery is inserted

incorrectly, since the terminals will hit a protective

polarity barrier.

Operating frequencies: 150 to 216 MHz

RF Power output: 50mW

Deviation: ±15kHz

Spurious radiation: 55dB below carrier

Equivalent input noise: -126dBV

Input level: Nominal 2mV to 300mV (before compression)

Input impedance: 22k Ohms (compatible with all Lo-Z microphones)

Input compressor: Soft compressor, 35 dB range allows

3 Volt max. input

Gain control range: 43dB; semi-log rotary control

Modulation indicators: Dual LEDs indicate modulation level and onset

of limiting

Controls: 3 position “OFF-MUTE-ON” for noiseless operation;

rotary knob adjusts audio gain

Connector: 3-pin XLR type with auto-locking collar

Battery: Any 9 Volt alkaline battery

Weight: 7 ozs. including battery

Dimensions: 1.5 x 1.5 x 4.2 inches

Emission Designator: 54KOF3E

Specifications subject to change without notice.

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Lectrosonics H187 User Manual Page 7

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