Operating Manual

Specifications

Table 5 Output Specifications and Characteristics (Continued)

Coherencea

The 1 PPS OUT time delay is < 10 nanoseconds from the

mean of the 1 PPS Input

 

 

 

Port to Port Isolation

90 dB

 

 

Isolation (with respect to 1 PPS

90 dB

input)

 

 

 

DRO 10 MHz Output Type

5401: Isolated SMA (J7-J12)

 

5402: Isolated SMA (J10-J15)

 

 

 

The DRO outputs 10 MHz signals with the following characteristics (After a 30 minute warm-up at an ambient temperature of 25ºC):

Level

1.6 to 3.0 volts peak-to-peak (adjustable)

 

 

 

Output Impedance

50Ω

 

 

 

Short Term Accuracy

3.0 x 10-11 RMS @ 1 second

 

 

Long Term Accuracy

5 x 10-12 RMS @ 1000 seconds (while disciplining)

 

 

Stability

2.5 x 10-12 Alan Deviation @ 100 seconds

 

 

 

Quiescent Phase Noise

Symmetricom 5401

Symmetricom 5402

 

 

 

1 Hz

< –94 dBc/Hz

< –85 dBc/Hz

 

 

 

10 Hz

< –110 dBc/Hz

< –100 dBc/Hz

 

 

 

100 Hz

< –140 dBc/Hz

< –130 dBc/Hz

 

 

 

1000 Hz

< –147 dBc/Hz

< –140 dBc/Hz

 

 

 

10 kHz

< –152 dBc/Hz

< –145 dBc/Hz

 

 

 

Spurs

Symmetricom 5401

Symmetricom 5402

 

 

 

Harmonic

40 dBc

40 dBc

 

 

 

Non-Harmonic

50 dBc

50 dBc

 

 

 

Port to Port Isolation

> 99 dB

> 99 dB

 

 

Coherence

2 nanoseconds (zero crossing of the 10 MHz sine wave with

respect to the rising edge of the 1 PPS output.)

 

 

 

 

aThe setup parameters have an effect on the coherence. Refer to the RS232 I/O de- scription in Chapter 3. Port to Port Isolation 90 dB Isolation (with respect to 1 PPS in- put) 90 dB.

PN 8500-0150, Rev. A, May 2005

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Symmetricom 5402, 5401 manual Coherence a

5401, 5402 specifications

The Symmetricom 5402 and 5401 are highly regarded timing and synchronization solutions designed for telecommunications and data networking applications. These devices are part of the renowned line of precision timekeeping products developed by Symmetricom, which is now known as Microchip Technology.

The Symmetricom 5402 offers advanced capabilities, including GPS and precision time protocol (PTP) synchronization. It provides an accurate and stable time reference, crucial for industries that require precise timing to ensure system integrity and communication efficiency. The 5402 supports various synchronization protocols including IEEE 1588v2, ensuring interoperability with existing systems. This allows organizations to implement cutting-edge technologies while maintaining compatibility with older infrastructure.

On the other hand, the Symmetricom 5401 serves as a more compact and economical option tailored for specific applications where full GPS capabilities may not be necessary. This unit simplifies the synchronization process while still offering reliable performance. The 5401 provides multiple outputs including T1/E1 and 10 MHz, making it versatile for different network configurations.

Both models incorporate advanced oscillator technology that ensures accuracy and stability. They have a temperature-compensated crystal oscillator (TCXO) or optional oven-controlled crystal oscillator (OCXO) that provides superior frequency stability across a wide range of operating conditions. These devices also feature high-performance phase-locked loops (PLLs), which enhance their ability to maintain synchronization over time and under varying operational environments.

Additional features include robust network management capabilities, allowing for real-time monitoring and diagnostics through a user-friendly interface. The devices are equipped with multiple input/output ports that facilitate seamless integration into existing network architectures. The Symmetricom 5402 and 5401 support both local and remote management, enabling network administrators to maintain optimal synchronization performance.

In summary, the Symmetricom 5402 and 5401 deliver reliable, high-precision timing solutions designed to meet the demands of modern telecommunications infrastructures. With their advanced synchronization technologies, versatile connectivity options, and robust performance characteristics, these devices are essential components for ensuring accurate timekeeping in any network. Whether organizations choose the feature-rich 5402 or the cost-effective 5401, they can be confident in the reliability and precision these products deliver.