Instruction manual

Explorer 100 Transmitters
5
EXPLORER 100 TRANSMITTERS
The Explorer 100’s multi-channel format provides worldwide compliance with regional frequency
allocations and maximum freedom from interference.
Unique Explorer Companding System
An upgraded Explorer Compression/Expansion system ensures best possible signal to noise
performance.
Automatic Gain Control Option
The design of the limiter in the MICRON Explorer 100 transmitter enables it to be used as an automatic
gain control system, without the pumping effect associated with audio AGC systems. It can also be used
as a 'distortionless' limiter, to prevent distortion due to over-modulation.
'Overload-proof' Audio Input Amplifier
The variable -gain microphone amplifier has a gain control range of 40dB. Distortion is less than 0.3%
over the whole of this range.
LED Volume Indicator (AF Peak)
One problem associated with radio microphones is the setting of the modulation level. As with tape
recording, too low a setting results in a poor signal to noise ratio, too high a setting causes distortion. A
common practice is to adjust the audio gain of the transmitter until distortion is heard and then 'back off a
bit'. The MICRON transmitter is fitted with a simple LED volume indicator to allow the modulation level to
be set quickly and accurately, without having to monitor the receiver output. A ‘-10’ indicator is available
only on the TX700B model, which shows modulation metering at 10 dB below limiting level. The
addition of this LED simplifies the setting up procedure making it more accurate.