Lectrosonics H187 - Manual (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.