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Phone: +86-10-62893032

E-mail: support@neutrontek.com

Company Address: No. 536, Huai Sha Road, Bohai Town, Huairou District, Beijing

R&D Center: 4th Floor, Yicheng International Center, Haidian District, Beijing

Handheld Mobile Transport Clock DNHH-9

The DNTS-9 series of high-performance time servers provides stable, reliable, and traceable network time services for closed‑environment data centers.

Keywords:

Handheld Portable Clock

Category:

Portable Clock

Download:

DNHH-9_Technical_Specification_English.docx

Tel :

+86-10-62893032

For details, please contact Mr. Yu.

For more details, please contact Engineer Wen.

Product Features

Product Overview

Technical Specifications

Optional accessories

Product Features
Product Overview
Base parameter
Optional accessories

- Commodity name: Handheld Mobile Transport Clock DNHH-9
The DNTS-9 series of high-performance time servers provides stable, reliable, and traceable network time services for closed‑environment data centers.

Product Features
When paired with the newly developed DNTS‑9 series of high‑performance time servers, it can provide stable, reliable, and traceable network time services for closed‑type data centers. In enclosed server room environments where satellite receiving antennas cannot be installed, operations personnel can periodically use the DNHH‑9 portable clock to receive satellite time signals outdoors, then bring the DNHH‑9 into the server room. By connecting the DNHH‑9 to the DNTS‑9 via a dedicated interface and cable, the DNTS‑9 obtains precise time information traceable to the highest‑level UTC time source, thereby continuing to deliver stable and reliable time services to the data center’s internal network.
It provides a precise and reliable time‑frequency reference for scientific expeditions, exploration, surveying, and mapping activities. The DNHH‑9 handheld transportable clock can operate continuously for more than 14 hours without an external power supply and can perform real‑time frequency calibration via GNSS satellite systems, delivering accurate and dependable time‑frequency information to scientific and engineering instruments under a wide range of demanding environmental conditions.
Product Overview

The DNHH‑9 handheld time‑keeping clock is a portable, high‑precision time and frequency reference source. Unlike rack‑mount units, the DNHH‑9 boasts a compact size, lightweight design, and an integrated power supply, making it suitable for mobile applications such as outdoor use.

The DNHH-9 features a high‑performance oven‑controlled crystal oscillator and can lock its frequency to the UTC atomic clock ensemble maintained by the U.S. Naval Observatory and the National Time Service Center of China via the GPS satellite system. When satellite signals are lost, the device automatically compensates for frequency drift in the built‑in oven‑controlled crystal oscillator using an advanced discipline algorithm. Consequently, the DNHH‑9 can serve as a portable time source, enabling the transfer of satellite‑derived time signals to locations where installing a satellite antenna is impractical.

The DNHH-9 handheld time‑keeping device can perform automatic calibration by receiving GPS satellite signals, eliminating the need for manual intervention and obviating the requirement for additional specialized equipment or auxiliary testing.

The DNHH-9 features a built-in high-capacity lithium‑ion battery pack (139 Wh), providing continuous operation for at least 14 hours on a full charge (typical value when equipped with a CPT temperature‑compensated crystal oscillator). The longer the device maintains continuous satellite signal lock, the higher the accuracy of its internal frequency source, resulting in a more precise clock signal for downstream equipment. The battery pack utilizes brand‑new, original Panasonic cells and is paired with a mature battery management system to ensure safe operation and storage.

The panel is equipped with an OLED/VFD display that provides clear visibility of the device’s operating status and remaining battery level even in direct sunlight. It also features six high-brightness, dual-color LED indicators that intuitively signal operational status, alarm conditions, and more.

The device’s rear panel is equipped with a variety of commonly used output interfaces, providing standard time and frequency signals such as 1‑PPS pulse signals, 10 MHz clock signals, ToD time information, and IRIG‑B codes, thereby supplying timing signals to a wide range of equipment. Depending on the specific application scenario, NTP network interfaces, PTP network interfaces, and custom‑configured arbitrary‑frequency output interfaces can be optionally selected or tailored to meet the diverse needs of various industries and use cases.

Technical Specifications

Serial number	Importance	Indicator item	Indicator Requirements	Score
1	▲	Handheld搬运钟	1. Receiver: A standalone BeiDou satellite receiver supporting B1 and B2a frequency bands, with timing accuracy better than 5 ns (1σ). Tracking sensitivity: −165 dBm; single-point positioning accuracy: ≤1.5 m CEP. 2. LCD display: GNSS satellite status—number of satellites, acquisition process, and tracking or hold‑on status; position coordinates (longitude, latitude, altitude). Antenna status: operating, shorted, or disconnected; Equipment status: whether time synchronization with external sources is functioning normally. 3. Indicator light display Six tri-color indicator lights: PWR, ANT, SAT, LOCK, VALID, ALARM; Signals indicating power, antenna, satellite, lock, valid, and alarm statuses. ▲4. Relative frequency deviation of 5×10⁻¹³; a test report from the Second Metrology and Testing Research Center of the National Defense Science and Technology Industry or another nationally recognized testing authority is available. ▲5. Frequency stability at 1 second: 2 × 10⁻¹¹ (a test report from the Second Metrology and Testing Research Center of the National Defense Science and Technology Industry or a nationally recognized testing authority is available). ▲6. GNSS‑locked rubidium frequency standard with a second‑pulse timing偏差 of 20 ns; a test report from the Second Metrology and Testing Research Center of the National Defense Science and Technology Industry or another nationally recognized testing authority is available. ▲7. 1 PPS jitter: 36 ps (a test report from the Second Metrology and Testing Research Center of the National Defense Science and Technology Industry or a nationally recognized testing authority can be provided) ▲8. 1PPS timing accuracy (24-hour): 71 ns (a test report from the Second Metrology and Testing Research Center of the National Defense Science and Technology Industry or a nationally recognized testing institution can be provided) 9. Lithium battery, capacity: ≥100 Wh (operates independently for more than 14 hours); includes a battery charging switch, one channel.

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Product Overview

The DNHH‑9 handheld time‑keeping clock is a portable, high‑precision time and frequency reference source. Unlike rack‑mount units, the DNHH‑9 boasts a compact size, lightweight design, and an integrated power supply, making it suitable for mobile applications such as outdoor use.

The DNHH-9 features a high‑performance oven‑controlled crystal oscillator and can lock its frequency to the UTC atomic clock ensemble maintained by the U.S. Naval Observatory and the National Time Service Center of China via the GPS satellite system. When satellite signals are lost, the device automatically compensates for frequency drift in the built‑in oven‑controlled crystal oscillator using an advanced discipline algorithm. Consequently, the DNHH‑9 can serve as a portable time source, enabling the transfer of satellite‑derived time signals to locations where installing a satellite antenna is impractical.

The DNHH-9 handheld time‑keeping device can perform automatic calibration by receiving GPS satellite signals, eliminating the need for manual intervention and obviating the requirement for additional specialized equipment or auxiliary testing.

The DNHH-9 features a built-in high-capacity lithium‑ion battery pack (139 Wh), providing continuous operation for at least 14 hours on a full charge (typical value when equipped with a CPT temperature‑compensated crystal oscillator). The longer the device maintains continuous satellite signal lock, the higher the accuracy of its internal frequency source, resulting in a more precise clock signal for downstream equipment. The battery pack utilizes brand‑new, original Panasonic cells and is paired with a mature battery management system to ensure safe operation and storage.

The panel is equipped with an OLED/VFD display that provides clear visibility of the device’s operating status and remaining battery level even in direct sunlight. It also features six high-brightness, dual-color LED indicators that intuitively signal operational status, alarm conditions, and more.

The device’s rear panel is equipped with a variety of commonly used output interfaces, providing standard time and frequency signals such as 1‑PPS pulse signals, 10 MHz clock signals, ToD time information, and IRIG‑B codes, thereby supplying timing signals to a wide range of equipment. Depending on the specific application scenario, NTP network interfaces, PTP network interfaces, and custom‑configured arbitrary‑frequency output interfaces can be optionally selected or tailored to meet the diverse needs of various industries and use cases.

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Technical Specifications

Serial number	Importance	Indicator item	Indicator Requirements	Score
1	▲	Handheld搬运钟	1. Receiver: A standalone BeiDou satellite receiver supporting B1 and B2a frequency bands, with timing accuracy better than 5 ns (1σ). Tracking sensitivity: −165 dBm; single-point positioning accuracy: ≤1.5 m CEP. 2. LCD display: GNSS satellite status—number of satellites, acquisition process, and tracking or hold‑on status; position coordinates (longitude, latitude, altitude). Antenna status: operating, shorted, or disconnected; Equipment status: whether time synchronization with external sources is functioning normally. 3. Indicator light display Six tri-color indicator lights: PWR, ANT, SAT, LOCK, VALID, ALARM; Signals indicating power, antenna, satellite, lock, valid, and alarm statuses. ▲4. Relative frequency deviation of 5×10⁻¹³; a test report from the Second Metrology and Testing Research Center of the National Defense Science and Technology Industry or another nationally recognized testing authority is available. ▲5. Frequency stability at 1 second: 2 × 10⁻¹¹ (a test report from the Second Metrology and Testing Research Center of the National Defense Science and Technology Industry or a nationally recognized testing authority is available). ▲6. GNSS‑locked rubidium frequency standard with a second‑pulse timing偏差 of 20 ns; a test report from the Second Metrology and Testing Research Center of the National Defense Science and Technology Industry or another nationally recognized testing authority is available. ▲7. 1 PPS jitter: 36 ps (a test report from the Second Metrology and Testing Research Center of the National Defense Science and Technology Industry or a nationally recognized testing authority can be provided) ▲8. 1PPS timing accuracy (24-hour): 71 ns (a test report from the Second Metrology and Testing Research Center of the National Defense Science and Technology Industry or a nationally recognized testing institution can be provided) 9. Lithium battery, capacity: ≥100 Wh (operates independently for more than 14 hours); includes a battery charging switch, one channel.