Digital clocks are widely used these days. The HQS-Y digital clock system is used primarily in schools and other facilities. In addition to measuring time, the clock can also be used to control the school bell.
The network consists of master and an unlimited number of slave clocks. The master clock of the network is called HQS-Y01, while the slave clocks are signified by numbers and letters based on the number of clocks (e.g. HQS-Y02, HQS-Y03, etc.) The numbers indicate the number of slave clocks within the system.
The clocks are connected to the system wirelessly (radio) or via wired (RS485) connections where both connections can be used. The master clock receives the exact time via the GPS receiver and then synchronizes with the other clocks. The clocks can also be controlled by computer, transmitting the information to the master unit, which collects and stores the data in the EEPROM memory until the data is modified. Each clock has an integrated sensor which registers outdoor light conditions and adjusts its display brightness accordingly.
The receiver can be used as an integral part of the master unit and as a receiver. It operates with SiRF Star II chips.
Technical specification:
Weight: 40 g, Dimensions: 80 mm x 40 mm x 22 mm. Number of channels: 20. Extra sensibility starting at -159 dBm. Positional precision: 10 m, precision with WAAS 5 m. Hot start: 1 s. Warm start: 38 s. Cold start: 42 s. Consumption 70 mA (5V). Output: NMEA 0183 and SiRF III binary protocol.