For applications that demand time and frequency synchronization, RKTPL’s timing solutions provide the best performance to price ratio. Spanning a product range from simple timing modules to accurate clocks, RKTPL’s offerings meet the differing requirements of the end product.

Our Time & Frequency Product Family 

RKTPL’s timing modules are based on the global navigation satellite footprint, providing accurate timing from a combination of GPS, GLONASS and IRNSS constellations. All modules support SBAS (WAAS, EGNOS, GAGAN) and deliver improved timing accuracy. Features like TRAIM, single satellite based time output, position hold mode, dedicated timing message output are built in to address the specific needs of the timing community.

RKTPL offers GNSS clocks that provides accurate time and frequency outputs by disciplining a VCXO/TCXO/OCXO/DOCXO/Rb/Cs/Maser. These clocks offer the flexibility to choose the stability of clocks to be used based on the needs of the end application.

Active Hydrogen Maser -A
Active Hydrogen Maser-B
Passive Hydrogen Maser
Rubidium Frequency Standard
High Stability Crystal Oscillators
IRNSS-GPS-GLONASS-GAGAN Receiver
GPS/GNSS Time & Frequency Module
Active Hydrogen Maser -A

Active Hydrogen Maser

    • The highest accuracy and short- and long-term frequency stability
    • Autonomous automatic cavity tuning (no external reference required)
    • Frequency drift: ≤5×10-16/day
    • Frequency accuracy: ±5.10–13/year
  • Frequency stability: 7.10–16/day, 2.10–13/s

DESCRIPTION

The Active Hydrogen Maser is designed to operate as a high stability, precision spectral pure 5,10 and 100 MHz signal source and provides time scale signals of 1 s period.

The Active Hydrogen Maser provides the highest frequency stability among all industrial frequency standards known today.

The principle of operation is based on a quartz crystal oscillator, phase locked to the hyperfine transition of the hydrogen atom.

APPLICATIONS

National  timekeeping and  frequency services, ground control and surveillance points of satellite navigation systems,  very long baseline interferometry  (VLBI), for scientific research.

SPECIFICATIONS

Frequency Outputs: 5MHz,10 MHz  and  100 MHz (sine), 1±0.2 V rms  into 50 Ohm

Timing Output: 1 Hz (1pps)

Amplitude: >2.5 V into 50 Ohm

Width: 10–20 ms

Rise time: <15 ns

Jitter: <0.1 ns

Frequency  stability ( Allan Deviation)

1 s               £2×10–13

10 s             £3×10–14

100 s           £7×10–15

1 hour          £2×10–15

1 day            £7×10–16

(Although this is a rugged instrument which operates within   +10°C  to +35 °C ambient, the quoted specifications for  100 s, 1 hour and 1 day apply while the instrument is confined to a ±1°C ambient  temperature  change).

Temperature   sensitivity: 1.5×10–15/ ° C

Magnetic field sensitivity: <1×10–14/Gauss

Drift (aging): 2×10-15 /day at delivery, <pstyle="font-size: 9pt"="">5×10-16 /day after 1 year operation</pstyle="font-size:>

Frequency trim range: 1×10–10

Setting resolution: 1×10–15 Steps

Phase noise:

Offset from carrier

SSB phase noise, dBc/Hz

10 Hz

–130

100 Hz

–140

1 kHz

–150

10 kHz

–150

Harmonic distortion: < 30 dB (for 5 MHz output)

Non-harmonic distortion: < –100 dB in the range from 10 Hz to 10 kHz

GENERAL

Power: 100, 120, 220 V±10 %, 240 V+5–10 %, 47–63 Hz or 22–30 V dc

At power line failure the Instrument automatically switches to an external 22–30 V dc Power Supply.

Power consumption: 150 VA ac, 100 W dc

Operating Temperature : +10°C  to +35 °C 

Storage temperature  : –50°C to +50 °C

Humidity: up to 80 % at 25 °C

Size: (H ×W ×D)  70.8×48.0×59.5  cm

Weight: 90 kg

Service Life: 15 years

Active Hydrogen Maser-B

Active Hydrogen Maser

  • The highest accuracy and short- / long-term stability

  • The lowest environment temperature changing sensitivity

  • Frequency accuracy ± 5×10–13 /year

  • Frequency instability ≤ 5×10–16/day, ≤ 1,5×10–13/s

  • Temperature coefficient of frequency: ± 1,5×10–15/°C

AHM is designed to operate as a source of high-stability, high-accuracy and spectrally pure frequency and timing signals.
AHM has an autonomous automatic cavity tuning system, which dispenses with the use of another analogous Maser.
AHM has a built-in self-test system; the unit control and parameters monitoring (including warnings on errors / malfunctions) are performed through touchscreen graphic interface (on-the-spot) and through LAN interface (remotely). 

AHM Applications:
Metrology, time keeping & precision time scaling, frequency reference source, global positioning / navigation satellite systems (GPS / GNSS), deep space tracking, radio astronomy with very long baseline interferometry / array (VLBI / VLBA).
Please note that some compulsory performance parameters values specified for serial production (Frequency Instability and Phase Noise especially) can be improved (tuned up / adjusted) upon a Customer's request.

PERFORMANCE PARAMETERS

Frequency accuracy and stability:

Compulsory values

Typical values

Accuracy (at shipment date)

≤(±)1×10–13

≤(±)5×10–14

Instability sу(2,t) at time interval t 
(Allan Deviation):

Compulsory values
(2 Hz bandwidth)

Typical values
(2 Hz bandwidth)

Typical values
(0,5 Hz bandwidth)

1 s

≤1,5×10–13

≤1,2×10–13

≤0,6×10–13

10 s

≤2,5×10–14

≤2,0×10–14

≤1,5×10–14

100 s

≤5,5×10–15

≤4,5×10–15

≤4,5×10–15

1 000 s*

(n/d)

≤1,5×10–15

≤1,5×10–15

10 000 s*

(n/d)

≤1,0×10–15

≤1,0×10–15

100 000 s*

(n/d)

≤3,5×10–16

≤3,5×10–16

1 h*

≤1,5×10–15

≤1,3×10–15

≤1,3×10–15

1 day*

≤5,0×10–16

≤5,0×10–16

≤5,0×10–16

* Specified / measured only under laboratory conditions: during the whole measuring period (not less than 1 day for 1 hour instability measuring; not less than 10 days for 1 day instability measuring) the ambient temperature variation shall be not more than ± 1 °C and with the rate of ambient temperature change ?0.5°C per hour within 10 to 35 °C operating temperature range at 30 to 80 % operating humidity range; during the whole measuring period the Maser shall be protected against strong magnetic fields and vibration; during the whole measuring period the Maser supply voltage shall be constant, with the surges not more than ± 5 % of the nominal supply voltage value.

Frequency aging (Drift) 
(during 24 hours of operation)

≤1×10–15 (at shipment date)
≤5×10–16 (after 6 months of continuous operation)*

* Typically achieved values after a year of continuous unperturbed operation: ? 2.0×10–16

Temperature sensitivity

≤1,0×10–15/°C (Typical : ≤0,5× 10–15/°C)

Magnetic field sensitivity

≤5,0×10–15/Gauss

Power source sensitivity

~ 0 (zero within the measurement accuracy)

Frequency settability:

Frequency trim range

1×10–10

Setting resolution

1×10–16

Frequency output signals (sinusoidal)
(2 × 5 MHz, 2 × 10 MHz and 2 × 100 MHz frequency isolated outputs):

Output connectors type

TNC

Amplitude

1 ± 0.2 V RMS (13 ± 2 dBm) into 50 Ohms load

Harmonic distortion

≤–30 dBc (for 5 MHz output)

Non-harmonic distortion (1 Hz - 10 kHz)

≤–100 dBc

SSB phase noise (at 5 MHz, dBc/Hz):

Compulsory values

Typical values

1 Hz

≤–116

≤–120

10 Hz

≤–130

≤–140

100 Hz

≤–140

≤–155

1 kHz

≤–150

≤–160

10 kHz

≤–150

≤–160

100 kHz

≤–150

≤–160

SSB phase noise (at 10 MHz*, dBc/Hz):
*calculated values

Compulsory values

Typical values

1 Hz

≤–110

≤–114

10 Hz

≤–124

≤–134

100 Hz

≤–134

≤–149

1 kHz

≤–144

≤–154

10 kHz

≤–144

≤–154

100 kHz

≤–144

≤–154

SSB phase noise (at 100 MHz*, dBc/Hz):
*calculated values

Compulsory values

Typical values

1 Hz

≤–90

≤–94

10 Hz

≤–104

≤–114

100 Hz

≤–114

≤–129

1 kHz

≤–124

≤–134

10 kHz

≤–124

≤–134

100 kHz

≤–124

≤–134

Timing output signals (pulse)
(2 × 1 Hz (1 PPS) timing isolated outputs, one of the outputs has a correctable timescale):

Output connectors type

TNC

Polarity

Positive

Amplitude (output level is TTL compatible)

2.5 to 5 V Peak (into 50 Ohms load)

Width

10 to 20 ?s

Rise time

≤5 ns (typical values: ≤2 ns)

Jitter

≤0.1 ns RMS (typical values: ≤0.02 ns)

Timescale correction range

0 to 1 s

Timescale correction resolution

1 ns

Timing synchronization pulse (synchronization to reference pulse):

Input connector type

TNC

Polarity

Positive

Input impedance

50 Ohms

Time reference

Rising edge

Accuracy (Synchronization error)

≤50 ns (typical values: ≤20 ns)

Amplitude (input level is TTL compatible)

2.5 to 5 V Peak (into 50 Ohms load)

AHM control and monitoring

Touchscreen graphic interface

AHM remote control and monitoring interface

LAN interface control / monitoring functions:
• Unit parameters (check points) control / monitoring; 
• Frequency control / correction within 1×10–10 s range and with 1×10–16 s setting resolution; 
• Timescale control / correction within 0 to 1s range and with 1 ns correction resolution;
• Check points data transmission, possible errors / malfunctions data transmission.

GENERAL PARAMETERS

Power requirements:

Input voltage:
AC

100 / 120 / 220 V ± 10 % 
240 V ± 5 %
47 to 63 Hz

DC (external)*
* At AC power line failure the Maser automatically switches to the external 22 … 30 V DC power supply.

22 to 30 V

Power consumption:

 

AC

≤ 150 VA

DC

≤ 100 W

Environmental requirements:

 

Temperature:

 

Operating

+10 to +35 °C

Storage

–50 to +50 °C

Relative humidity:

 

Operating

up to 80 % at 25 °C

Storage

up to 98 % at 25 °C

Atmospheric pressure:

 

Operating

84 to 106 kPa (630 to 795 mm Hg)

Storage

12 to 106 kPa (90 to 795 mm Hg)

Maser dimensions* (height×width×depth)

955×550×600 mm

* The Maser dimensions are given with an accuracy of ± 3 mm for each (height/width/depth) direction.

Maser weight

100 (± 0.5) kg

Package** dimensions* (height×width×depth)
* The package dimensions are given with an accuracy of ± 50 mm for each (height/width/depth) direction.

1280×780×870 mm

Package** (Maser + Packing Unit) weight

175 (± 5) kg

** The Maser is supplied completed with an Original Packing Unit (plywood box + inner steel transportation frame with two rubber pneumatic shock absorbers). The Original Packing Unit protects the Maser against shocks and strains and provides safety of the Maser during transportation. The Maser shall be transported in its Original Packing Unit only; the Maser transportation without its Original Packing Unit can cause irreparable damage to the Maser. Please keep the Original Packing Unit for the Active Hydrogen Maser within the whole Maser’s lifetime.

Service life

15 years

Standard warranty period

24 months

Extended warranty period (upon a customer's request and at additional charge)

up to 7 years

 

Passive Hydrogen Maser

Passive Hydrogen Maser

  • High long-term and short-term frequency stability: ≤5´10-13/s and ≤4´10-15/day

  • Frequency drift: ≤2´10-15/day

  • Small size and weight

DESCRIPTION

The Passive Hydrogen Maser is designed to operate as a high-stability frequency source with precise, spectrally pure 5 MHz output.

The Passive Hydrogen Maser is the first in the world Time and Frequency Hydrogen Maser of a passive type. Its principle of operation is based on hydrogen atom emission, but hydrogen atoms emit only by the action of an external signal from a crystal oscillator. The quantum device is used as a frequency discriminator in an automatic frequency tuning system of a crystal oscillator.

APPLICATIONS

National time and frequency services, ground control and surveillance points of satellite radionavigation systems,  transportable clocks, a reference standard for verification of other standards and oscillators and for scientific research.

SPECIFICATIONS

Frequency Outputs: 5 MHz (sine), 1±0.2 V rms into 50 Ohm

Timing Output: :>1 Hz (pulse)

Amplitude: ³2.5 V into 50 Ohm

Width: 10–20 ms

Rise time: <30 ns

Jitter: <0.1 ns

Frequency stability (Allan Deviation):

Averaging time

 

σ(τ)

Specifications

Typical Values

1 s

≤1.5´10–12

≤4.8´10-13

10 s

≤5´10–13

≤1.5´10–13

102 s

≤2´10–13

≤4.5´10–14

103 s

≤5´10–14

≤1.5´10–14

1 h         

≤3 ´10–14

≤8.5 ´10–15

1 day     

≤1´10–14

≤4´10–15

Drift (Aging): <3´10–15/day

Accuracy: ±1.2´10–12/year

Temperature sensitivity: ≤2 ´10–14/ °C

Magnetic field sensitivity: ±2.10–14/Gauss

Frequency trim range: 1´10–10

Setting resolution: 1´10–14 Steps

Phase noise:

Offset from carrier

SSB phase noise, dBc/Hz

10 Hz

–110

100 Hz

–125

1 kHz

–150

10 kHz

–150

Harmonic distortion: < 30 dB

Non-harmonic distortion: < 100 dB

GENERAL

Power: 220±22 V, 50±1 Hz, 220±11 V, 115±6 V, 400 Hz

At power line failure the Instrument automatically switches to an external 22–30 V DC Power Supply

Power consumption: 140 VA, 90 W

Operating temperature range: 5–40 °C

Storage temperature range: –50–+50 °C

Humidity: up to 80 % at 25 °C

Size: (H ´W ´D) 28.0 ´48.0 x 55.5 cm

Weight: 51 kg

Service Life: 12  years

Rubidium Frequency Standard

Rubidium Frequency Standard

DESCRIPTION

Rb Frequency Standard is used to keep time and frequency units, to measure high-stability time and frequency parameters, to verify and certify various types of high-stability crystal oscillators.

The Standards can be supplied as a separate module with a 27 Vdc power supply in a standard case with a built-in time scale former providing time scale signal outputs.

The Instrument principle of operation is based on a crystal oscillator frequency stabilization to the electromagnetic energy absorption frequency during RB87 atoms transition from one energy state to another.

The high stability of the standard output signal is defined by the frequency stability of the atomic transition used.

SPECIFICATIONS

Output: 5 MHz, 1±0.2 V rms into 50 Ohm

Frequency stability:

Measurement time

CH1-81

1 s

1.10–11

10 s

5.10–12

100 s

3.10–12

Temperature coefficient of frequency: 1.2.10–12/ °C

Frequency tuning range (by a magnetic field): 1.5.10–9

Drift per day: 1.10–12 (CH1-81, CH1-81/2/4), 3.10–12 (CH1-81/1/3/5)

Phase Noise

Offset from carrier

SSB phase noise, dB/Hz

85 Hz

–120

1 kHz

–140

10 kHz

–150

Frequency drift in operating temperature range: not more than 1.2.10–10

GENERAL

Operating temperature range: –40–+55 °C

Power: 22–30 V dc

Power consumption:

warm-up: <80 W

operating mode at 25 °C: 18–21 W

Dimensions, mm; weight, kg:

358x167x82; 3.5 (CH1-81, CH1-81/1)

459x188x129; 6.0 (CH1-81/2/3)

459x188x129; 6.5 (CH1-81/4/5)

High Stability Crystal Oscillators

High Stability Crystal Oscillators

  • High metrological characteristics
  • Small size and weight
  • Output signal frequency 5 and 10 MHz

DESCRIPTION

The Crystal Oscillators provide generation of high stability signals.

Crystal Oscillators are widely used in communication, navigation, radiolocation systems, in frequency measurement equipment as reference signal sources and in atomic frequency standards as output signal sources.

Environmental resistance, small size, weight, power consumption and a short warm-up time allow to use Oscillators in various mobile systems and complexes.

SPECIFICATIONS

Parameter

Option 1

Option 2

A

B

C

A

B

C

Output frequency, MHz

5

10

Tuning range (with an external corrector)

>±5.10–7

>±5.10–7

Output level, V (Rl=50 Ohms)

0.5±0.15

0.5±0.15

Frequency ageing after 72 h continuous operation:

 

 

 

 

 

 

per day

±5.10–10

±1.10–9

±2.10–9

±5.10–10

±1.10–9

±2.10–9

per year

±5.10–8

±1.10–7

±2.10–7

±5.10–8

±2.10–7

±2.10–7

Short-term stability (Allan var.):

 

 

 

 

 

 

1 s

3.10–12

5.10–12

1.10–11

5.10–12

5.10–12

1.10–11

10 s

5.10–12

5.10–12

1.10–11

5.10–12

5.10–12

1.10–11

Phase noise spectral power density, dBc/Hz:

 

 

 

 

 

 

at 10 Hz offset from carrier

–125

–125

–120

–125

–125

–120

at 100 Hz offset from carrier

–145

–145

–140

–145

–145

–140

at 1 kHz offset from carrier

–155

–155

–150

–155

–155

–150

at 10 kHz offset from carrier

–157

–155

–150

–157

–155

–150

Frequency tuning with ±5 V external voltage

±(2.5–10).10–8

±(2.5–10).10–8

Operating temperature range, °C

–40–+65

–40–+70

Frequency stability over operating temperature range

±3.10–8

±3.10–8

Frequency setting time after switch on within ±3.10–8 from the settled value, not more than, min.

 

6

 

6

Supply voltage (stabilized), V

+12(15, 18, 20)±10 %

+12(15, 18, 20)±10 %

Power consumption at +25 °C, W:

 

 

steady state

1.5

1.5

during warm-up

8

8

Dimensions, mm

45x45x38

45x45x38

Weight; volume, kg; cm3

0.09, 80

0.09, 80

 

IRNSS-GPS-GLONASS-GAGAN Receiver

Features

  • Indigenous IRNSS+GPS+GLONASS+GAGAN Receiver
  • 1 PPS Output and RS232/RS422
  • Ethernet interfaces, connects to device through a TCP/UDP data channel
  • LINUX/ WINDOWS compatible
  • USB 2.0 interface
  • NMEA0183 Rev 4.10 messages
  • Rugged IP67 qualified unit

The receiver has a 100Mbps LAN interface through which NMEA 0183 messages are communicated. The front panel has indications for power, position fix and link connectivity. The product also supports RS232/RS422/USB 2.0 interfaces. The position updates can be recorded in to a built-in flash memory.

GPS/GNSS Time & Frequency Module

Features

  • GPS-SBAS based time and frequency Receiver
  • Time and Frequency outputs
    • 1PPS
    • 10 MHZ Sine wave
    • 10 MHZ Square wave
  • High stable holdover performance
  • Multiple interfaces
    • BNC connectors (1PPS, 10MHz)
    • TNC connector (Antenna)
    • RS-232 on DB-9 connector
  • LED based indicator
  • ROHS complaint

These GNSS clocks provide a holdover support to ensure uninterrupted outputs. The clocks are available either as a timing module, sub-system, systems are completely packaged as per customer needs.

For Further Information

Please Contact Us for more information.