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參數(shù)資料
| 型號： | TZA3040 |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | XO, clock |
| 英文描述： | SDH/SONET data and clock recovery unit STM1/4 OC3/12 |
| 中文描述： | SDH / SONET的數(shù)據(jù)和時鐘恢復單元STM1 / 4 OC3/12 |
| 文件頁數(shù)： | 15/54頁 |
| 文件大?。?/td> | 1852K |
| 代理商： | TZA3040 |
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Fiber optic transceiver board STM1/4/8,
OC3,12,24, FC/GE
Philips Semiconductors
15
Application Note
AN98090
off.
This is a problem since the TZA3004 needs the 19 MHz signal, generated by the TZA3005’s synthesizer.
Therefore remove C307 and C308, and mount a dummy load of 100 ohm between the outputs of the
transmission lines from the splitter.
This ensures proper termination & pulse waveform at the laserdriver, and the TZA3005 can remain on to
generate the 19 MHz for the TZA3004, without disturbing the input signal of the TZA3001 laserdriver.
3.
Providing a 19 MHz reference for the DCR directly via REFCLKQ
A provision has been made to provide a reference clock without the TZA3005. This is enabled by removing
0 ohm resistor R511 and connecting a 220 nF 1206 capacitor on pads for C519 (diagonally on the PCB near
L306. This provides a path to the net ‘19MHz3004’.
The following measurement equipment is necessary for this measurement
1.
Pattern generator. Output level 400 .. 800 mV.
2.
Optical attenuator
3.
Optical power meter
4.
Bit Error Receiver
5.
Power supply of 3.3 V and 5.0 V max 800 mA for the demoboard
The connections of the measurement equipment to the board should be done as follows:
1.
Connect 3.3 V and 5.0 V power supply to the demoboard
2.
Connect the output of the laser to the optical attenuator input
3.
Connect the electrical output LA to a sample scope. This shows the switching current of the laser
4.
Connect the output of the optical attenuator to the photo detector input
5.
Either remove C307 and C308 & place a dummy OR apply a clock via REFCLKQ and make the connection
via the C519 (both described above).
6.
Connect the output of the pattern generator to LDR DIN and LDR DINQ. If a single ended source is used,
terminate the non-used input with 50 ohm.
7.
Connect the Bit Error Receiver to the COUT/COUTQ and DOUT/DOUTQ outputs of the Data & Clock
recovery unit. If a single ended receiver is used, terminate the non-used outputs with 50 ohm.
8.
Mind the polarity inversion of the total system. (Use signal inversion on the Bit Error Receiver).
9.
Disable the TZA3001 alarms by either changing the alarm levels (Potentiometer Alarmhi/Alarmlo) or setting
‘AlarmReset’ high.
10. Set the TZA3000 output to DCR by selecting CML: CML/ECL = high
11. Set the Data & Clock recovery unit in ‘both’ mode by making ENL = LOW
12. Check if the reference frequency for the DCR is available. If the TZA3005 Mux/demux generates 19 MHz for
the DCR by activating it: all other switches should be low, except MODE=HIGH, DLEN=HIGH and
LLEN=HIGH. If the REFCLKQ input is used: check the connection.
1.4.6
Sensitivity on 1 chip receiver TZA3000
When the TZA3000 is solely tested, the PECL outputs should be selected. (PECL/CML = LOW).
1.4.7
Laserdriver output waveforms
The setup of the transmitter is identical to that of the sections above. The optical output can be monitored on an
optical oscilloscope.
相關PDF資料 |
PDF描述 |
|---|---|
| TZA3001AHL | SDH/SONET STM4/OC12 laser driver(SDH/SONET STM4/OC12 激光驅動器) |
| TZA3001A | SDH/SONET STM4/OC12 laser driver(SDH/SONET STM4/OC12 激光驅動器) |
| TZA3005 | SDH/SONET STM1/OC3 and STM4/OC12 transceiver |
| TZA3023 | SDH/SONET STM4/OC12 transimpedance amplifier |
| TZA3023T | SDH/SONET STM4/OC12 transimpedance amplifier |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TZA3041 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Gigabit Ethernet/Fibre Channel laser drivers |
| TZA3041AHL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Gigabit Ethernet/Fibre Channel laser drivers |
| TZA3041BHL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Gigabit Ethernet/Fibre Channel laser drivers |
| TZA3041U | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Gigabit Ethernet/Fibre Channel laser drivers |
| TZA3043 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Gigabit Ethernet/Fibre Channel transimpedance amplifier |
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