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BeiDou GPS satellite
Receives BeiDou and GPS satellite signals to obtain standard time currently, there are over 50 BeiDou and GPS satellites in total, providing wide coverage it only needs to receive signals for a few minutes each day for time synchronization suitable for outdoor environments, mountainous areas, remote regions, at sea, and on islands.
CDMA network time synchronization
Receives standard time from China Telecoms CDMA base stations time synchronization is possible wherever China Telecoms Tianyi mobile phones can receive a signal China Telecom currently has hundreds of thousands of base stations, providing excellent signal coverage it is suitable for densely populated urban and town areas, as well as indoor and basement locations.
Network time synchronization
It obtains standard time from an internet or local area network time server it automatically sends a request to the server every time it powers on it connects directly via the network port to a router on the local area network.
Overview:
DH34W is a time terminal that displays information using LED digital tubes. It can receive external signals for automatic time correction, features exquisite craftsmanship, and has an elegant and attractive appearance, making it suitable for various applications such as offices and control rooms.
Features:
(1) Automatic time correction to eliminate timing errors; supports multiple time synchronization methods including Beidou/GPS satellite, telecommunication base stations, and NTP Ethernet;
(2) Hour and minute time display;
(3) Power-off memory function;
(4) Optional: Supports PoE power supply;
(5) Optional: Supports network management monitoring (NTP timing type only);
(6) Optional: LED color: Red/White;
Specifications
| Category | Subcategory | Description |
|---|---|---|
| Interfaces | B: Beidou/GPS Satellite Signal | Supports Beidou B1 & GPS L1 frequency signals: (1) Operating frequency: 1555 MHz ~ 1580 MHz; (2) Gain: 28±2dB@3.3V; (3) Polarization: Right-hand circular polarization; (4) Noise figure: 1.5dB; (5) Output impedance: 50Ω; (6) Voltage standing wave ratio: ≤2 |
| C: China Telecom Base Station Signal | 800M–1800M wireless signal | |
| E: Ethernet Network Data | 10M/100M/10G Ethernet, IEEE 802.3, NTP v1.v2.v3, SNTP, DHCP | |
| W: WiFi Wireless Signal | WiFi@2.4GHz, IEEE 802.11b/g/n, NTP, SNTP | |
| S: Proprietary LoRa Wireless | 398M–525MHz LoRa wireless signal | |
| R: Industrial Bus | RS485 bus | |
| Electrical Characteristics | Power Supply | 110~220V, 50Hz (suitable for regions using 110V AC, e.g., South Korea, Taiwan) |
| Power Consumption | 1.5W~5W (varies by model) | |
| Reliability | MTBF > 100000h | |
| Electromagnetic Compatibility | Complies with GB-9254-1998 Class A (radio interference limit) | |
| Mechanical Characteristics | Appearance | Integrally molded plastic shell / high-strength glass panel |
| Installation Method | Wall-mounted | |
| Dimensions | 130×360×35mm | |
| Environmental Characteristics | Operating Temperature | -20°C ~ +70°C |
| Storage Temperature | -40°C ~ +70°C | |
| Humidity | 5%~95% RH |
Dimensions
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