KJK-1000 series - precision time signal sources, signal distributors, and delay meters
KJK-1200R High-Precision Rubidium Frequency Standard
The KJK-1200R is a high-precision frequency and time reference unit housed in a standard 1U 19-inch rack-mountable metal case. At its core is the M-295 module, featuring a rubidium oscillator, a type of atomic clock known for high accuracy and stability. This module generates highly stable and pure 10MHz sine wave, 10MHz pulse14, and 1 Pulse Per Second (1PPS) reference signals.

Key Features:
- Rubidium Oscillator Driven: Utilizes the M-295 module with a high-precision rubidium atomic frequency standard for exceptional stability and low drift.
- High-Purity Outputs: Delivers 10MHz sine wave, 10MHz pulse, and 1PPS signals with unmatched signal purity and frequency stability. Rubidium oscillators provide excellent short-term stability and low phase noise.
- GNSS Disciplining: Features an internal GNSS receiver input, allowing the rubidium oscillator to be disciplined to the Coordinated Universal Time (UTC) scale for enhanced long-term accuracy8.
- User Interface: Equipped with a front panel containing an LCD, keypad for configuration, and LED indicators for status signaling.
- Integrated Power Supply: Operates from a single 230VAC mains power source.
- Output Distribution: Includes a built-in 12-output TTL signal splitter for distributing reference signals.
- Expansion Options:
- Accommodates a second splitter module, such as the M-243 (12x TTL) or M-244 (16x RS422), for increased output capacity.
- Supports the addition of an M-291 module for 1PPS delay measurement capabilities.
- Form Factor: Compact 1U, 19-inch rack-mountable chassis suitable for standard equipment racks.
The KJK-1200R provides a robust and precise timing and frequency reference solution ideal for synchronization, telecommunications infrastructure, calibration laboratories, and demanding scientific applications.
KJK-1201D High-Precision Rubidium Reference Signal Generator
The KJK-1201D is a state-of-the-art reference signal generator powered by a high-precision rubidium oscillator. It provides 10 MHz and 1PPS reference signals with exceptional frequency stability and signal purity, making it ideal for demanding applications in synchronization, communications, and instrumentation.

Key Features:
- Rubidium Oscillator Core: Utilizes an advanced rubidium atomic clock, ensuring ultra-low phase noise and long-term frequency stability for both 10 MHz and 1PPS outputs.
- Versatile Signal Outputs: Delivers three types of reference signals:
- 10 MHz sine wave
- 10 MHz pulse
- 1PPS (one pulse per second)
- User Interface: Equipped with a front-panel LCD, keyboard, and LED indicators for intuitive operation and real-time status monitoring.
- Power Supply: Operates on a standard 230 VAC input, simplifying integration into existing laboratory or industrial environments.
- Optional Delay Meter: Can be fitted with the M-291-1PPS delay meter for advanced timing analysis.
- Compact and Robust Design: All components are housed in a single 1U metal desktop case, optimizing space while providing durability and electromagnetic shielding.
The KJK-1201D is engineered for applications where precise timing and reference signals are critical, offering unmatched reliability and performance in a compact, user-friendly form factor.
KJK-1110R Signal Distribution Unit
The KJK-1110R is a versatile signal distribution unit housed in a standard 1U, 19-inch metal rack-mountable case. It is equipped with two independent 12-output TTL distribution modules, providing 24 digital outputs.

Core Features:
- Dual TTL Distributors: Includes two modules, each offering 12 TTL outputs.
- Power Supply: Features a single, integrated 230VAC power supply.
- Rack Mountable: Designed in a compact 1U, 19-inch form factor for easy integration into standard equipment racks.
Expansion Capabilities:
- The unit offers flexibility with optional expansion slots for up to two additional distribution modules.
- These expansion modules can be either TTL or RS-422 type distributors.
- Furthermore, the distribution modules (both standard and optional) can be configured with different input cards to suit various signal requirements, including RS-422, TTL, or GPS inputs.
This modular design allows the KJK-1110R to be adapted for diverse signal distribution needs within a compact footprint.
KJK-1120R RS422 Distribution Unit
The KJK-1120R is a versatile signal distribution solution housed in a standard 1U, 19-inch metal rackmount enclosure.

Standard Configuration:
- Distribution Modules: Includes two high-density modules, each providing 16 RS-422 outputs.
- Power Supply: Equipped with a single 230VAC power supply unit.
Expansion Capability:
- The unit offers flexibility with space for up to two additional distribution modules. These optional expansion modules can be either TTL or RS-422 types.
Input Flexibility:
- The splitter modules within the KJK-1120R are designed to accommodate various signal types through interchangeable input cards. Supported input card types include RS-422, TTL, and GPS.
This configuration allows for significant signal distribution capacity and customization within a compact 1U footprint.
KJK-1231/1232 - GNSS/PCSK225 time receiver with RS-485 interface
The KJK-1231 is an external receiver unit designed to interface with Global Navigation Satellite Systems (GNSS). This device provides a robust solution for acquiring GNSS data for various applications. Built for flexibility and reliable connectivity, the KJK-1231 integrates easily into existing setups using standard cabling and offers long-distance communication capabilities.
Key Features:
- GNSS Reception: Functions as an external receiver for GNSS signals.
- RS-485 Interface: Equipped with an RS-485 interface for serial data communication.
- Modular Design: Features interchangeable OCP-RCB format GNSS cards, allowing for flexibility and potential customization.
- Standard Cabling: Connection is established using readily available UTP/SFTP CAT 5+ cable.
- Extended Range: Supports communication distances up to a maximum of 500 meters via its RS-485 interface.
The KJK-1232 is an external receiver unit (PCSK225) designed to capture the official time frame signal broadcast on the 225 kHz frequency. This signal originates from the Polskie Radio Program I transmitter located in Solec Kujawski, Poland, and carries the time standard provided by the Polish Central Office of Measures. Leveraging this reliable broadcast, the KJK-1232 delivers a synchronization accuracy of 10ms, making it suitable for applications requiring precise timekeeping based on the national standard.
Key Features:


- Coverage: Designed to operate effectively throughout Poland and potentially in adjacent regions where the signal is available.
- Signal Reception: Receives the 225 kHz time signal broadcast from Solec Kujawski.
- Synchronization: Achieves 10ms accuracy relative to the official Polish time standard.
- Modularity: Equipped with interchangeable OCP-RCB format cards for enhanced flexibility.
- Connectivity: Uses standard UTP/SFTP CAT 5+ cabling for straightforward installation.
- Interface: Features an RS-485 interface allowing for connection distances up to 500 meters.
KJK-1301D - Digital Control Clock
The KJK-1301 is an advanced digital control clock designed for precise management of electrical devices, including lighting systems and various technological equipment.

Key Features:
- Dual Isolated Inputs: Features two isolated inputs compatible with external KJK-123x series receivers.
- Large Graphical Display: Equipped with a clear, large graphical LCD for easy viewing of status and programming information.
- Simple User Interface: Includes a straightforward keypad for intuitive operation and configuration.
- High-Power Outputs: Provides six independent power switch outputs, rated at 230V / 10A each, for controlling electrical circuits.
- Flexible Scheduling: Supports reliable scheduling with the capacity for up to 50 distinct programmed schedules.
- Integrated Calendar: Includes a built-in calendar function for date-based control.
- Multiple Time Synchronization Options:
- Network Time: Synchronizes time accurately via an internet connection.
- GNSS Time: Capable of acquiring precise time signals from GNSS constellations (GPS, Galileo, Beidou).
- Enhanced Accuracy Option: Supports the use of an external PCSK225 standard receiver, maintaining high time accuracy even in environments prone to GPS signal jamming.
- Connectivity: Features a built-in WiFi interface, enabling internet access for time synchronization and potentially retrieving other relevant information online.
The KJK-1301 offers robust and versatile timing control for demanding applications requiring automation and precision.