Lectrosonics H185 - Manual (Page 7)

The LEVEL LED turns on at -10dB below full deviation. The LIMIT LED turns on at full deviation and
indicates that the input shunt compressor is operating. The input compressor operates over a full 20dB
range regardless of the gain control setting. The compressor uses a true absolute value circuit to
detect both positive and negative peaks. The attack time is 2 milliseconds and the release time is 80
milliseconds. Occasional limiting is desirable, indicating that the gain is correctly set and the transmitter
is fully modulated.
BATTERY REPLACEMENT
The H185 transmitter is powered by a standard alkaline 9 Volt battery. A lithium 9 Volt battery may
also be used. It is important that you use ONLY an ALKALINE or LITHIUM 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,
while lithium batteries will give almost 30 hours of useful life.
To open the battery compartment, press outward on the cover door in the direction of the arrow as
shown in the drawing. Only slight, sliding pressure is needed to open and close the battery door.
Figure 5 - Battery Compartment Action
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.
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