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STM-Rb-N Series High-Performance Rubidium Clock
STM-Rb-N Series High-Performance Rubidium Clock
The STM-RB-N series rubidium atomic clock is a typical rubidium lamp-pumped atomic clock, characterized by good short-term stability, small size, light weight, short lock time, and low power consumption. The product supports external 1PPS automatic taming for better accuracy and smaller frequency drift, and is widely used in fields such as navigation and positioning, power, rail transit, and communications.
Product features

1PPS Taming Function

Fast lock and tame, frequency accuracy better than 5E-11 within

300 seconds after power on

High stability: 6E-13/s

Low aging rate: ≤2.0E-12/day

Wide temperature operation

High-resolution digital frequency adjustment (5E-13)

Product Features

Specification name

Indicator parameters

Remark

RF Output

Frequency

10MHz

1 sine wave output, SMA interface

Output Power

11±2dBm

Load impedance 50Ω@10MHz

Factory accuracy

5E-11

+25℃

Short-term stability

Conventional model C: 5.0E-12/1s; <4.0E-12/10s; <3.0E-12/100s

Professional P: 3.0E-12/1s; <2.0E-12/10s; <6.0E-13/100s

High performance H: 6.0 E-13/1s; < 6.0E -13 / 10s;

5.0E-13/100s

Domestic G:<5.0E-12/1s; <4.0E-12/10s; <3.0E-12/100s

Phase Noise

Regular model C:

1Hz   ≤-95dBc/Hz

10Hz  ≤-130dBc/Hz

100Hz ≤-145dBc/Hz

1kHz  ≤-150dBc/Hz

10kHz ≤-155dBc/Hz

Professional P:

1Hz   ≤-100dBc/Hz

10Hz  ≤-132dBc/Hz

100Hz ≤-150dBc/Hz

1kHz  ≤-158dBc/Hz

10kHz ≤-160dBc/Hz

High Performance H:

1Hz   ≤-115dBc/Hz

10Hz  ≤-135dBc/Hz

100Hz ≤-150dBc/Hz

1kHz  ≤- 158dBc/Hz

10kHz ≤-160dBc/Hz

Domestic Model G:

1Hz ≤-95dBc/Hz

10Hz ≤-130dBc/Hz

100Hz ≤-145dBc/Hz

1kHz ≤-150dBc/Hz

10kHz ≤-155dBc/Hz

Timekeeping accuracy

0.5us/24h(P/H type)

0.8us/24h(C/G type)

Frequency reproducibility

± 2 E-11 (P/H type)

±5E-11(C/G type)

aging

±2.0E-12/day(P/H type)

±5.0E-12/day(C/G type)

Harmonic

-40dBc

Spurious

-80dBc

Frequency Temperature Characteristics

<3.0E-10 (0℃ to 50℃); <6.0E-10 (others)

1PPS output

Rise time

2ns

Pulse Width

500us~500ms (default 100ms)

Level

4.5V(1MΩ/15pF load)

PPS Taming

PPS Input

3.3V~+5.5V

Taming accuracy

<1E-12

Power on for 2 hours, taming time is more than 1 day

Monitoring and Control

Frequency modulation accuracy

<5.0E-13

Adjustment range: ±1.0E-6

Lock Time

≤ 3 min.

+25°C

Condition Monitoring

Rubidium clock lock and discipline lock indication

High level lock (5V)

Low level unlock (0V)

Communication monitoring

RS-232

Supply voltage

Input voltage

+16 ~ 28 VDC

Maximum current

1.4 A (+25°C)

Steady-state current

<0.5A (+25°C)

Power supply interface

DB9 Male

environment

Operating temperature

-40℃~+60℃

Storage temperature

-55℃~+85℃

Relative humidity

≤85% non-condensing (working state)

Appearance

weight

490g

size

127mm×92.5mm×39.6mm



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