78P2241-IGT Просмотр технического описания (PDF) - TDK Corporation
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78P2241-IGT Datasheet PDF : 23 Pages
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78P2241
E3/DS3/STS-1
Transceiver
DS3/STS-1 RECEIVER (RFO = 5.23kΩ for DS3 and 4.53kΩ for STS-1, E# pin is set high or allowed to float),
Input is transformer coupled
PARAMETER
Peak Differential Input
Amplitude, LIN+ and LIN-
(see Note 5)
Peak Differential Input
Amplitude, LIN+ and LIN-
Peak Differential Input
Amplitude, LIN+ and LIN-
CONDITION
MIN
MON=0. Signal at DSX is 360-850mVP 90
(see Note 6)
Mon=1
25
Mon=0. DS3 HIGH (see Note 7)
90
TYP MAX UNIT
850 mVP
80
1200
mVP
mVP
Bit Error Ratio in the presence of IS is a sinusoidal tone, 22.368 MHz
10-9
an Interfering Signal (IS) at
LIN+,LIN-
for DS3 or 25.92MHz for STS-1. Data
is a PRBS15 (215-1) pattern. IS power
is 10dB below data signal power.
RCLK rise/fall time TRCT
Cl=25pf
5
ns
RCLK period
TRCF
DS3
STS-1
22.35
ns
19.29
RCLK pulse width
TRC
DS3
STS-1
12.24
ns
9.65
RPOS/RNEG data setup time
TRDPS
CL=15 pF
7
ns
RPOS/RNEG data hold time
TRPDH
CL=15 pF
7
ns
Note 5:
Signal source should meet DS3 template of ANSI-T102.1993 Figure 4 and STS-1 template of ANSI-
T102.1993 Figure 5, Loss characteristics of the WE728A or RG 59B cable should be better than Figure
C2 of ANSI-T102.1993.
Note 6: Receiver can handle up to 450 feet of cable loss (5.5dB) from the DSX cross-connect.
Note 7: Case where test signal is fed directly into receiver with fast rise times violates DS3 template and normal
maximum. In this mode no noise, jitter, or interfering tone impairments will be added.
Note 8:
This is performed in digital loop-back mode. Jitter is supplied by a Bit Error Rate Tester and bit errors
are measured. Jitter is specified in terms of UI (Unit Interval) and frequency, is summed with DS3
PRBS15 data through 450 feet of cable.
8
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