Chapter 4 ______________________________________________________ Hand Terminal RTH21
VAISALA _______________________________________________________________________ 41
CHAPTER 4
HAND TERMINAL RTH21
This chapter contains information on using the Hand Terminal RTH21.
General Information
Hand Terminal RTH21 is a microprocessor-based device with a
membrane keypad and Liquid Crystal Display (LCD) for controlling the
radio and motor drivers of the antenna. With the hand terminal it is
possible, for example, to find the radiosonde signal, choose the
radiosonde signal tracking mode (Track or AFC), and scan the signal.
You can also set the antenna to track manually or automatically, drive the
antenna manually, monitor mechanical angles, and monitor PTU.
The hand terminal electronics are housed in an EMI/EMP-shielded,
robust metal enclosure. Connection to the antenna pedestal is made
through a shielded spiral cable. The terminal communicates with other
units via Arcnet Local Area Network (LAN). The dimensions of the unit
are 96 x 160 x 35 mm.
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