參數(shù)資料
型號(hào)： 78P2253-IGT
廠商： Electronic Theatre Controls, Inc.
英文描述： XTAL CER SMT 11X5 4PAD
中文描述： 收發(fā)器
文件頁(yè)數(shù)： 15/23頁(yè)
文件大?。?/td> 107K
代理商： 78P2253-IGT
78P2253
E4/STM-1/STS-3/OC-3
Transceiver
15
Note 1
– The maximum “steady state” amplitude should not exceed the 0.55V limit. Overshoots and other transients are permitted to fall into the
shaded area bounded by the amplitude levels 0.55V and 0.6V, provided that they do not exceed the steady state level by more than 0.05V.
Note 2
– For all measurements using these masks, the signal should be AC coupled, using a capacitor of not less than 0.01
μ
F, to the input of the
oscilloscope used for measurements. The nominal zero level for both masks should be aligned with the oscilloscope trace with no input signal.
With the signal then applied, the vertical position of the trace can be adjusted with the objective of meeting the limits of the masks. Any such
adjustment should be the same for both masks and should not exceed
±
0.05V. This may be checked by removing the input signal again and
verifying that the trace lies with
±
0.05V of the nominal zero level of the masks.
Note 3
– Each pulse in a coded pulse sequence should meet the limits of the relevant mask, irrespective of the state of the preceding or
succeeding pulses, with both pulse masks fixed in the same relation to a common timing reference, i.e. with their nominal start and finish edges
coincident. The masks allow for HF jitter caused by intersymbol interference in the output stage, but not for jitter present in the timing signal
associated with the source of the interface signal. When using an oscilloscope technique to determine pulse compliance with the mask, it is
important that successive traces of the pulses overlay in order to suppress the effects of low frequency jitter. This can be accomplished by several
techniques [e.g. a) triggering the oscilloscope on the measured waveform or b) providing both the oscilloscope and the pulse output circuits with
the same clock signal].
Note 4
– For the purpose of these masks, the rise time and decay time should be measured between –0.4V and 0.4V, and should not exceed 2ns.
Note 5
–The inverse pulse will have the same characteristics, noting that the timing tolerance at the level of the negative and positive transitions
are
±
0.1ns and
±
0.5ns respectively.
Figure 7 – Mask of a Pulse corresponding to a binary One in STS-3 mode
(Note 1)
(Note 1)
0.60
0.55
0.50
0.45
0.40
0.05
-0.05
-0.50
-0.55
-0.60
-0.45
-0.40
(Note 1)
Nominal
Zero Level
(Note 2)
6.43ns
0.1ns
0.1ns
1ns
1.608ns
1ns
Nominal
Pulse
V
3.215ns
1.2ns
1.2ns
3.215ns
1.608ns
1ns
1ns
0.5ns
0.5ns
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
78P2254 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:OC-3 / STM-1 / STS-3 / E4 Transceivers
78P2254-IGT 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Telecomm/Datacomm
78P2342-IGT 制造商:TERIDIAN 制造商全稱(chēng):TERIDIAN 功能描述:2-port E3/DS3/STS-1 LIU with Jitter Attenuator
78P2342-IGT/A07 制造商:TERIDIAN 制造商全稱(chēng):TERIDIAN 功能描述:2-port E3/DS3/STS-1 LIU with Jitter Attenuator
78P2342-IGT/F 制造商:Maxim Integrated Products 功能描述:LEAD FREE - Rail/Tube
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