WMS420 23
Description
The HT420 handheld transmitter operates within a switching bandwidth of up to 30 MHz in the
530.025 to 931.850 MHz UHF carrier frequency range and offers up to 8 selectable carrier
frequencies. The transmitter uses an antenna integrated within the housing.
The capsule in the transmitter is the patented dynamic AKG D5 capsule with its hypercardioid
directional characteristic. It provides low handling noise sensitivity, high gain before feedback
and brilliant sound quality, as well as a built-in wind and pop filter to reduce wind and breath
noise.
Control elements
1 Display: Shows the set transmission
channel.
2 CHANNEL: With this button, you can
adjust the transmitter to one of up to eight
different carrier frequencies within the
transmitter's carrier frequency band.
3 GAIN: Use this slider to set the audio
input sensitivity of the transmitter in two
steps: "HI" = high input sensitivity,
"LOW" = low input sensitivity.
NOTE
The CHANNEL button and the GAIN slider are located beneath a rubber flap. Fold this down to
use the functions.
4 Control LED: This LED indicates the operational availability of the transmitter.
LED is green: Battery is OK.
LED is red: As soon as the LED changes to red, the remaining battery power allows at
most one more hour of operation. We recommend exchanging the batteries as soon as
possible.
5 On/Off switch: This slider has three positions:
ON: The transmitter's power supply is turned on.
MUTE: The audio signal received from the microphone head is muted. The power supply
and HF carrier frequency remain activated.
OFF: The transmitter's power supply is turned off.
NOTE
If you use a rechargeable battery, the LED will change to red approximately 15 minutes before
the battery goes flat.
6 Carrier frequency label: An adhesive label stating the carrier frequency band is affixed
above the battery compartment. The enclosed frequency chart provides further information
about the available frequencies.
7 Battery compartment cover: See Inserting and testing batteries in the handheld/pocket
transmitters (Page 27)
8 Charging contacts: The recessed charging contacts allow you to charge a battery using the
optional charger CU400 without having to remove the battery from the battery compartment.
NOTE
Turn the transmitter off prior to charging.
HT420 handheld transmitter
Figure 3: Controls on HT420 transmitter
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