
DS3171/DS3172/DS3173/DS3174
230 of 232
Table 18-10. Receiver Input Characteristics—E3 Mode
(V
DD
= 3.3V 5%, T
A
= -40°C to +85°C.)
PARAMETER
MIN
TYP
MAX
UNITS
Receive Sensitivity (Length of Cable)
Signal-to-Noise Ratio, Interfering Signal Test (Notes 2, 3)
Input Pulse Amplitude, RMON = 0 (Notes 2, 3)
Input Pulse Amplitude, RMON = 1 (Notes 2, 3)
Analog LOS Declare, RMON = 0 (Note 4)
Analog LOS Clear, RMON = 0 (Note 4)
Analog LOS Declare, RMON = 1 (Note 4)
Analog LOS Clear, RMON = 1 (Note 4)
Intrinsic Jitter Generation (Note 2)
900
-16
-29
1200
12
-24
-17
0.03
ft
1300
260
-28
-38
mVpk
mVpk
dB
dB
dB
dB
UI
P-P
Note 1:
An interfering signal (2
15
– 1 PRBS for DS3, 2
23
– 1 PRBS for E3, B3ZS/HDB3 encoded, compliant waveshape, nominal bit rate) is
added to the wanted signal. The combined signal is passed through 0 to 900ft of coaxial cable and presented to the LIU. This spec
indicates the lowest signal-to-noise ratio that results in a bit error ratio <10
.
Note 2:
Not tested during production test.
Note 3:
Measured on the line side (i.e., the BNC connector side) of the 1:2 receive transformer (
Figure 1-1
). During measurement, incoming
data traffic is unframed 2
– 1 PRBS for DS3 and unframed 2
– 1 PRBS for E3.
Note 4:
With respect to nominal 800mVpk signal for DS3 and nominal 1000mVpk signal for E3.
Table 18-11. Transmitter Output Characteristics—DS3 Modes
(V
DD
= 3.3V 5%, T
A
= -40°C to +85°C.)
PARAMETER
MIN
700
520
0.9
TYP
800
700
MAX
900
800
1.1
UNITS
mVpk
mVpk
DS3 Output Pulse Amplitude, TLBO = 0 (Note 5)
DS3 Output Pulse Amplitude, TLBO = 1 (Note 5)
Ratio of Positive and Negative Pulse-Peak Amplitudes
DS3 Unframed All-Ones Power Level at 22.368MHz, 3kHz
Bandwidth
DS3 Unframed All-Ones Power Level at 44.736MHz vs.
Power Level at 22.368MHz, 3kHz Bandwidth
Intrinsic Jitter Generation (Note 6)
-1.8
+5.7
dBm
-20
dB
0.02
0.05
UI
P-P
Table 18-12. Transmitter Output Characteristics—E3 Mode
(V
DD
= 3.3V 5%, T
A
= -40°C to +85°C.)
PARAMETER
MIN
TYP
MAX
UNITS
Output Pulse Amplitude (Note 5)
900
1000
1100
mVpk
Pulse Width
Ratio of Positive and Negative Pulse Amplitudes (at Centers
of Pulses)
Ratio of Positive and Negative Pulse Widths (at Nominal Half
Amplitude)
Intrinsic Jitter Generation (Note 6)
14.55
ns
0.95
1.05
0.95
1.05
0.02
0.05
UI
P-P
Note 5:
Measured on the line side (i.e., the BNC connector side) of the 2:1 transmit transformer (
Figure 1-1
).
Note 6:
Measured with jitter-free clock applied to TCLK and a bandpass jitter filter with 10Hz and 800kHz cutoff frequencies. Not tested during
production test.