Products

Clock Ensemble Synthesizer

发布时间:2024-03-06

1 Equipment Image

2 Functional Specifications

2.1 Basic Functions

1) Synthesizes signals from multiple clocks in a clock ensemble

2) Performs continuous, uninterrupted multi-channel phase comparison

3) Automatically detects frequency and phase jumps in atomic clocks and switches input signals seamlessly, manually or automatically

4) Indicates operating status through the communication interface and front panel

5) Reports operating status and alarms every second through the communication interface and receives control commands, enabling real-time reporting and monitoring of equipment status and measurement data

2.2 Optional Extended Functions

1) Provides a 1PPS pulse output

2) Synchronizes with an external 1PPS signal

3) Supports frequency-step and phase adjustment of clock ensemble signals

3 Performance Specifications

3.1 Input Signal Requirements

Parameter

Standard Configuration

Optional Configuration

Input Signal Frequency

10 MHz

-

Number of Input Channels

3~6 channels

-

Input Signal Amplitude

7 ± 1 dBm

-

Input Signal Impedance

50 Ω impedance

-

Phase Difference between Input Signals

No requirement

-

Frequency Difference between Input Signals

≤1E-12

-

External Synchronization Signal Type

-

1PPS

Number of External Synchronization Signals

-

1 channel

External Synchronization Signal Amplitude

-

≥2.4 V (TTL level)

External Synchronization Input Impedance

-

50 Ω impedance



3.2 Output Frequency Signal Specifications

Parameter

Standard Configuration

Optional Configuration

Signal Frequency

10 MHz

-

Number of Channels

2 channels

-

Signal Amplitude

7 ± 1 dBm

(5~13)± 1 dBm

Output Impedance

Can drive a 50 Ω load

Frequency Stability

-

≤5.0E-12/1s
≤ 1.0E-12/10s
At averaging times above 10 s, stability is determined by the input signal specifications

Single-Sideband Phase Noise

-

Option 1

≤-100 dBc/Hz@1 Hz
≤ -130 dBc/Hz@10 Hz
≤ -140 dBc/Hz@100 Hz
≤ -150 dBc/Hz@1 kHz
≤ -150 dBc/Hz@10 kHz

Option 2

≤-115 dBc/Hz@1 Hz
≤ -130 dBc/Hz@10 Hz
≤ -142 dBc/Hz@100 Hz
≤ -157 dBc/Hz@1 kHz
≤ -158 dBc/Hz@10 kHz

Harmonic distortion

≤-40 dBc

-

Non-harmonic distortion

≤-80 dBc

-



3.3 Output Pulse Signal Specifications

Pulse outputs are optional and are not included in the standard configuration. Their specifications are as follows:

1) Signal frequency: 1PPS pulse signal

2) Number of channels: 1

3) Signal amplitude: ≥2.4 V (TTL level)

4) Leading-edge jitter: ≤50 ps

5) Leading-edge width: ≤2 ns (at the end of a 10-meter transmission cable)

6) Pulse width: customizable

3.4 Other Specifications

Parameter

Standard Configuration

Optional Configuration

Frequency-jump switching threshold

≥1E-11

Customizable

Phase-jump switching threshold

≥500 ps

Above 300 ps; customizable

Phase change before and after switching

≤500 ps

Same as the phase-jump switching threshold

Coarse synchronization accuracy

-

≤±100 ns





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