Datasheet

DS3150
23 of 28
RECEIVER INPUT CHARACTERISTICS—DS3 AND STS-1 MODES
(V
DD
= 3.3V ±5%, T
A
= 0°C to +70°C for DS3150Q/T, T
A
= -40°C to +85°C for DS3150QN/TN.)
PARAMETER MIN TYP MAX UNITS
Receive Sensitivity (Length of Cable) 900 1200 feet
Signal-to-Noise Ratio, Interfering Signal Test (Notes 9, 10) 10
Input Pulse Amplitude, RMON = 0 (Notes 10, 11) 1300 mVpk
Input Pulse Amplitude, RMON = 1 (Notes 10, 11) 260 mVpk
Analog LOS Declare, RMON = 0 (Note 12) -25 dB
Analog LOS Clear, RMON = 0 (Note 12) -18 dB
Analog LOS Declare, RMON = 1 (Note 12) -39 dB
Analog LOS Clear, RMON = 1 (Note 12) -32 dB
Intrinsic Jitter Generation (Note 10) 0.03 UI
P-P
RECEIVER INPUT CHARACTERISTICS—E3 MODE
(V
DD
= 3.3V ±5%, T
A
= 0°C to +70°C for DS3150Q/T, T
A
= -40°C to +85°C for DS3150QN/TN.)
PARAMETER MIN TYP MAX UNITS
Receive Sensitivity (Length of Cable) 900 1200 feet
Signal-to-Noise Ratio, Interfering Signal Test (Notes 9, 10) 12
Input Pulse Amplitude, RMON = 0 (Notes 10, 11) 1300 mVpk
Input Pulse Amplitude, RMON = 1 (Notes 10, 11) 260 mVpk
Analog LOS Declare, RMON = 0 (Note 12) -25 dB
Analog LOS Clear, RMON = 0 (Note 12) -18 dB
Analog LOS Declare, RMON = 1 (Note 12) -39 dB
Analog LOS Clear, RMON = 1 (Note 12) -32 dB
Intrinsic Jitter Generation (Note 10) 0.03 UI
P-P
Note 9:
An interfering signal (2
15
- 1 PRBS for DS3/STS-1, 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 900 feet of coaxial cable and presented to the
DS3150 receiver. This spec indicates the lowest signal-to-noise ratio that results in a bit error ratio <
10
-9
.
Note 10:
Not tested during production test.
Note 11:
Measured on the line side (the BNC connector side) of the 1:2 receive transformer (Figure 1-2
). During measurement, incoming
data traffic is unframed 2
15
- 1 PRBS for DS3/STS-1 and unframed 2
23
- 1 PRBS for E3.
Note 12:
With respect to nominal 800mVpk signal for DS3/STS-1 and nominal 1000mVpk signal for E3.