cates that the VC-4 starts three bytes after the K2 byte.

In addition, 8-bit counters are pro- vided for counting positive and negative justification events, as well as NDF events. Status bits are provided for indicating the de- tection of negative justification, positive justification, NDF, invalid

pointer, new pointer and concat- enation indication. When the LOP or LOPC states are entered as in- dicated in Figures 15 and 16, the LOP interrupt request bit in the corresponding OR#IRQ2 register will be set. Likewise if the AIS or AISC states are entered, the corre- sponding HPAIS interrupt request bit will be set.

3.9.4.9Path Overhead Monitoring

The POH monitoring block con- sists of J1, B3, C2, and G1 monitoring. These POH bytes are monitored for errors or changes in state.

3.9.4.9.1 Path Trace (J1) Capture/

Monitor

As with J1 insertion, the HDMP-

3001 supports two methods of

 

NDF_enable

lnc_lnd/dec_lnd

3x norm_point

 

 

NORM

Nx inv_point

3x norm_point

Nx NDF_enable

NDF_enable

3x norm_point

3x AIS_ind

 

3x AIS_ind

LOP

AIS

 

Nx inv_point

NOTE: x MEANS TIMES

Figure 15. Pointer Processing

Path Trace (J1) capture. The first,

typically used in SONET applica-

tions, captures 64 consecutive J1

bytes in the STS-3c/AU-4. The sec-

ond, used in SDH applications,

looks for a repeating 16 consecu-

tive J1 byte pattern. When it has

detected a consistent 16 byte pat-

tern for three consecutive

instances, the J1 pattern is stored

in designated registers.

CONC

Nx inv_point

3x conc_ind

3x conc_ind

3x AIS_ind

3x AIS_ind

LOPC

Nx inv_point

NOTE: x MEANS TIMES

Figure 16. Pointer tracking algorithm

AISC

33

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Agilent Technologies HDMP-3001 manual Path Overhead Monitoring, Supports two methods

HDMP-3001 specifications

Agilent Technologies, a prominent name in electronics and measurement technology, offers a wide range of products that cater to various industries. Among its notable offerings is the HDMP-3001, a high-speed, serial data transceiver designed to facilitate robust communications in electronic systems. The HDMP-3001 stands out with its ability to handle high bandwidths, making it particularly suited for applications requiring rapid data transfer, such as telecommunications, computer networking, and high-performance computing.

One of the main features of the HDMP-3001 is its advanced signaling technology. By employing differential signaling, the transceiver minimizes electromagnetic interference and enhances signal integrity. This is crucial in environments with multiple electronic devices operating simultaneously, as it ensures data is transmitted clearly and without degradation.

The HDMP-3001 operates at a maximum data rate of 1 Gbps, allowing for efficient data transfer over short distances. This capability is coupled with a flexible architecture that enables users to configure the transceiver for various applications. The device supports both point-to-point and point-to-multipoint configurations, giving engineers the versatility they need in designing communication links.

Moreover, the HDMP-3001 features on-chip clock recovery functionality, which simplifies system design by reducing the number of external components needed. This built-in feature allows the transceiver to maintain synchronization even as data rates increase, further enhancing performance.

The low power consumption characteristic of the HDMP-3001 is another notable advantage. This makes it an attractive choice for battery-operated devices and systems where power efficiency is critical. The transceiver’s design ensures optimal performance while minimizing heat generation and power draw, enabling longer operational lifetimes.

In terms of physical characteristics, the HDMP-3001 comes in a compact, surface-mount package, allowing for easier integration into various circuit board designs. The small form factor, combined with its innovative technology, makes it a popular choice among engineers seeking to improve data transmission reliability without compromising on space or power constraints.

Overall, Agilent Technologies' HDMP-3001 is a formidable solution for high-speed serial data transmission, characterized by its robust performance, low power consumption, and versatile configuration options. With these features, it continues to be an essential component in the evolving landscape of electronic communications.