Agilent/HP 83493A Single Mode Clock Recovery Module

Agilent/HP 83493A Single Mode Clock Recovery Module
Manufacturer: Agilent / HP
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Agilent/HP 83493A Single Mode Clock Recovery Module


Agilent/HP 83493A Single Mode Clock Recovery Module

Rent me for $300 a month

For the 86100A/B/C and 83480A Mainframes

   Agilent/HP 83493A clock recovery modules are designed to operate in 86100-series infiniium Digital Communications Analyzers (DCA) and 83480A DCAs. These modules recover clock and data information at standard telecom and datacom rates. The resulting trigger signal is made available to the DCA mainframe via a connector located on the module¿s rear-panel. An external front-panel cable passes the data signal, with some insertion loss, to the receiver module.

Optical clock recovery for 9/125 fibers
  • Wavelength range: 1200-1600 nm
  • Data rates: 0.155/0.622/1.250/2.488/2.500 Gb/s
  • PLL bandwidth: 50 to 70 kHz (internal triggering), 4 to 5 MHz (external output)
  • Input power: -20 to +3 dBm

   If you use an 83493A module in an 83480A DCA, you¿ll notice that, unlike most modules designed to be used with the 83480A, the clock recovery modules do not include Channel keys or menus. Also, there are no GPIB programming commands for these modules when used in an 83480A mainframe.

Direct triggering through clock recovery

   Typically an external timing reference is used to synchronize the oscilloscope to the test signal. In cases where a trigger signal is not available, clock recovery modules are available to derive a timing reference directly from the waveform to be measured. The Agilent 83493A  clock recovery modules are available for single-mode optical input signals. 83493A modules have excellent jitter performance to ensure accurate measurements. Each clock recovery module is designed to synchronize to a variety of common transmission rates. The 83493A can derive triggering from optical and electrical signals at any rate up to OC-48. Since the clock recovery system is integrated with the samplers, measurements are achieved with a single instrument connection.

Clock recovery loop bandwidth

   The Agilent/HP clock recovery modules have adjustable loop bandwidth settings. Loop bandwidth is very important in determining the accuracy of your waveform when measuring jitter, as well as testing for compliance. When using recovered clocks for triggering, the amount of jitter observed will depend on the loop bandwidth. As the loop bandwidth increases, more jitter is ¿tracked out¿ by the clock recovery resulting in less observed jitter.

¿Narrow loop bandwidth provides a ¿jitter free¿ system clock to observe a wide jitter spectrum

¿Wide loop bandwidth in some applications is specified by standards for compliance testing. Wide loop bandwidth settings mimic the performance of communications system receivers