Hiper Ii Receiver - Topcon HiPer II Operator's Manual

HiPer II Receiver

When power is turned on and the receiver self-test completes, the
receiver's 72 channels initialize and will begin tracking all visible
satellites. Each of the receiver's channels can be used to track any one
of the available GPS or GLONASS signals. The number of channels
on the HiPer II allows the receiver to track all visible global
positioning satellites at any time and location.
The internal micro-centered GNSS antenna delivers a stable and low-
noise signal to the receiver sub-system. This wide-band signal is
down-converted, filtered, digitized, and assigned to different
channels. The receiver processor controls the process of signal
tracking.
Once a specific satellite signal is locked into a receiver channel, it is
demodulated and necessary signal parameters (carrier and code
phases) are measured. Also, broadcast navigation data is retrieved
from the navigation frame.
Once the receiver successfully locks on to four or more satellites, its
absolute position in WGS84, along with the time offset between the
receiver clock and GPS time are computed. This information and the
measurement data can be optionally stored on the SD/SDHC card,
later downloaded onto a computer, and then processed using a post-
processing software package. Even when the receiver operates in
RTK mode, raw data measurements can still be recorded to the
receiver's storage card; this allows the operator to perform post-
mission verification of real-time results obtained in the field.
The HiPer II comes in one of the following configurations:
• with a Digital UHF TX/RX radio modem
• with a Digital UHF TX/RX radio modem and a GSM/GPRS
module
• with a Digital UHF TX/RX radio modem and a CDMA module
(for US customers)
P/N 7010-0982
Principles of Operation
1-7