PRL-257, 12 GHz Programmable 2-Phase Frequency Divider

Basic Lab Tools > Frequency Dividers > PRL-257

Applications:

• System Clock Simulation
• Low Jitter NECL Clock Source
• SONET Clock Generator
• Laser Pump Synchronization
• Scope triggering
• PRBS/BERT synchronization
• Optimizing outputs from frequency synthesizers
• Testing high-speed serial/SERDES links (GB Ethernet, eSATA, PCIe, HT, etc)
• An Essential Lab Tool for Working with ECL Circuits

Features:

• 12 GHz typical maximum External Clock Input frequency
• f/8 to f/128 with independent 2Φ outputs
• Common Divide by 8 pre-scalar for both Φ1 and Φ2
• Φ1 output=(f/8)/(1, 2, 4 or 8), for max. ratio of 64
• Φ2 output=(f/8)/(2, 4, 8 or 16), for max. ratio of 128
• Both Φ1 and Φ2 have two pairs of complementary NECL square wave outputs
• Single-ended AC Coupled Input with internal 50 Ω terminations
• 5 ps typical Edge Jitter
• 40 ps typical skew between f/n & f/n NECL outputs
• Complementary DC coupled NECL Outputs drive 50 Ω loads terminated to -2V, AC-coupled or floating 50 Ω loads
• SMA I/O Connectors
• Ready-to-Use 1.3 x 2.9 x 2.9-in. Module includes a ±8.5V AC/DC Adapter

Description:

The PRL-257-8 is an AC-coupled input, manually programmable, two phase frequency divider with two sets of complementary NECL outputs. It is capable of running at input frequencies in excess of 12 GHz.

It has a common divide-by-8 pre-scalar front end followed by two banks of independent manually programmable dividers, Φ1and Φ2. The f/8 pre-scalar output is further divided by 1, 2, 4, or 8 for the Φ1 bank via D0 and D1 of a two-bit DIP switch, providing a maximum ratio of 64. It is divided by 2, 4, 8 or 16 for the Φ2 bank via D2 and D3 of a second two-bit DIP switch, providing a maximum ratio of 128. All outputs are synchronous with the input frequency and are square waves (50% duty cycle) suitable for driving long lines terminated into 50 Ω/-2 V or AC-coupled 50 Ω loads.

The PRL-257 is ideal for applications where a high frequency divider or pre-scalar is needed for triggering or down-sampling. The two phases of output enable applications requiring two different ratios from a common reference frequency, and the 1:2 fanout feature enables system synchronization and monitoring/triggering applications from a single reference clock source. Applications for the PRL-257 include data acquisition, test, measurement, R&D, and system integration.

The unit includes an AC adapter for ready-to-use convenience on the bench or in a system. All I/O connectors are SMA. The extruded aluminum housing is suitable for mounting with the optional brackets.

***All prices are for domestic orders only. For international orders, please add 15%. Prices are subject to change without notice. Please consult factory for additional information at 310-515-5330.***

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