Summary delta event bits provide a consolidated view of the various individual delta event bits, grouped either by function or SONET tributary. Summary delta events are therefore a function of the other delta events bits in the register maps. The summary bits are read only, and will only be cleared when all delta event bits that contribute to them are cleared.

The summary bits are O/R'd to- gether to form the HDMP-3001 interrupt outputs, INTB and APS_INTB. The contribution of any of these bits to the summary interrupts can be deleted by set- ting the corresponding mask bit.

The loopback modes are selected by programming register bits in the register map. For details please refer to the description of register 0x001.

In SONET loopback mode SONET_R_TO_T_LOOPL, the data received on the RX_DATA pins is routed straight to the TX_DATA pins. The data is not processed by the chip. In SONET loopback mode SONET_R_TO_T_LOOP, the data received on the RX_DATA pins is processed by the line side receive circuitry. After the framer the

data is looped back to the line side transmit circuitry, from where it is sent out on the TX_DATA pins.

The Ethernet loopback mode can be enabled by setting register bit MII_LOOPBACK_MODE. In loopback mode, the MII RX inter- face and MII TX interface are used together to route the MAC frames from the MAC device back to the MAC device. That is, the MAC frames under test are re- ceived from the MAC device through the MII TX interface. Then, the MAC frames are not processed and are sent directly to the MII RX interface.

3.6 Test

3.6.1 Loopbacks

Several loopbacks are provided for test purposes, as shown in Figure 8:

•Loopback 1:

SONET_R_TO_R_LOOPL, requires STS-3c/STM-1 mode with TX_SONETCLK =

RX_SONETCLK.

•Loopback 2:

SONET_R_TO_T_LOOP, requires STS-3c/STM-1 mode with TX_SONETCLK =

RX_SONETCLK.

•Loopback 3: Loopback done on the board level.

•Loopback 4:

MII_T_TO_R_LOOP, only supported in PHY mode, i.e. when the HDMP-3001 drives the MII clocks.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

THIRD LOOPBACK

 

 

 

 

 

 

 

 

 

 

 

OUTSIDE CHIP

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TX

 

 

 

 

 

 

TX_LAPS

 

 

 

 

 

 

 

 

 

 

 

 

F

 

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OVERHEAD

 

I

 

 

 

MII

 

 

 

 

 

 

 

 

 

 

F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RX

 

 

 

 

O

 

RX_LAPS

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

Figure 8. Loopbacks

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Agilent Technologies HDMP-3001 manual Test Loopbacks
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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.
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