ABB SDCS-IOB-22 3BSE005177R1 Channel intelligent module

At medium jitter frequencies, the gain and tuning range of the VCO are not large enough to track input jitter. In this case, the VCO control voltage becomes large and saturates, and the VCO frequency dwells at one extreme of its tuning range or at the other. The size of the VCO tuning range, therefore, has only a small effect on the jitter accommodation. The delay-locked loop control voltage is now larger, and therefore the phase shifter takes on the burden of tracking the input jitter. The phase shifter range, in UI, can be seen as a broad plateau on the jitter tolerance curve. The phase shifter has a minimum range of 2 UI at all data rates

The gain of the loop integrator is small

 for high jitter frequencies; therefore, larger phase differences are needed to make the loop control voltage large enough to tune the range of the phase shifter. Large phase errors at high jitter frequencies cannot be tolerated. In this region, the gain of the integrator determines the jitter accommodation. Because the gain of the loop integrator declines linearly with frequency, jitter accommodation is lower with higher jitter frequency. At the highest frequencies, the loop gain is very small, and little tuning of the phase shifter can be expected. In this case, jitter accommodation is determined by the eye opening of the input data, the static phase error, and the residual loop jitter generation. The jitter accommodation is roughly 0.5 UI in this region. The corner frequency between the declining slope and the flat region is the closed loop bandwidth of the delay-locked loop, which is roughly 1.0 MHz at 675 Mb/s.

FREQUENCY ACQUISITION

 The ADN2816 acquires frequency from the data over a range of data frequencies from 10 Mb/s to 675 Mb/s. The lock detector circuit compares the frequency of the VCO and the frequency of the incoming data. When these frequencies differ by more than 1000 ppm, LOL is asserted. This initiates a frequency acquisition cycle. The VCO frequency is reset to the bottom of its range, which is 10 MHz. The frequency detector then compares this VCO frequency and the incoming data frequency and increments the VCO frequency, if necessary. Initially, the VCO frequency is incremented in large steps to aid fast acquisition. As the VCO frequency approaches the data frequency, the step size is reduced until the VCO frequency is within 250 ppm of the data frequency, at which point LOL is deasserted.

Company introduction

Temporal Ming sheng automation equipment co., LTD. Was established in April 02, 2021, registered jiujiang ruichang city in jiangxi province, east yi road no. 23 lake farmers 401 mall, the legal representative person Zhou Zuochen.

[Main Products]

Main products: PLC and DCS system spare parts modules of world famous brands

①Allen-Bradley 1756、1746、1747、1771、1785

②Schneider 140 Series PLC module

③General electric GE

IC693 IC697 IC698 Series PLC module

DS200 DS3800 DS215 IS200 IS215 IS220 Series gas turbine module

VMIVME Control module of series

④Bently：3500 series cards 3500/22M、3500/15、3500/92 And other products

⑤ICS TRIPLEX

⑥ABB Robots. FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、Panasonic Robots、MOTOMAN Robots。

⑦EMERSON：Spare parts for OVATION system, WDPF system and MAX1000 system.

⑧ Invensys Foxboro: I/A Series system, FBM (field input/output module) sequential control, ladder logic control, accident recall processing, digital analog conversion, input/output signal processing, data communication and processing, etc. Invensys Triconex: redundant fault-tolerant control system, Zui modern fault-tolerant controller based on triple module redundancy (TMR) structure.

⑨Woodward：505 series governor 9907-164 And other products

⑩Bosch Rexroth：Indramat，I/O module,PLC CPU,Motors, drives and other products. 

◆Motorola：MVME 162、MVME 167、MVME1772、MVME177and other products.