78P2253-IGT Просмотр технического описания (PDF) - TDK Corporation
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78P2253-IGT Datasheet PDF : 23 Pages
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78P2253
E4/STM-1/STS-3/OC-3
Transceiver
ELECTRICAL SPECIFICATIONS (continued)
TRANSMITTER OUTPUT JITTER
The transmit jitter specification ensures compliance with ITU-T G.823 and G.825 and ANSI T1.105.03-1994 for
all supported rates. The corner frequency of the transmit PLL is nominally 3.0 MHz.
Transmitter
Output
Jitter
Detector
20dB/decade
200 Hz
3.5 MHz
Measured Jitter
Amplitude
PARAMETER
Transmitter Output Jitter
CONDITION
200 Hz to 3.5 MHz
MIN NOM MAX
UNIT
0.075
UI
TRANSMITTER SPECIFICATIONS FOR CMI INTERFACE IN E4 MODE
Bit Rate: 139.264Mbit/s ± 15ppm
Code: coded mark inversion (CMI)
The following specifications are met with the external components for E4 operation, above, and configured with
a recommended 1:1 transformer as in Figure 10. With the coaxial output port driving a 75Ω load, the output
pulses conform to the templates in Figure 4 and Figure 5.
PARAMETER
Peak-to-peak Output Voltage
CONDITION
Template
MIN NOM MAX
0.9
1.1
UNIT
V
Rise/ Fall Time
10-90%
2
ns
Transition Timing Tolerance
Negative Transitions
Positive Transitions at Interval
Boundaries
Positive Transitions at mid-
interval
-0.1
-0.5
-0.35
0.1
ns
0.5
ns
0.35
ns
TRANSMISSION PERFORMANCE
PARAMETER
CONDITION
Return Loss
7MHz to 240MHz
MIN NOM MAX
15
UNIT
dB
10
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