Rainbow Electronics DS3170 - Manual (Page 230)

DS3170 DS3/E3 Single-Chip Transceiver
230 of 233
17.5.2 LIU Input/Output Characteristics
Table 17-10. Receiver Input Characteristics—DS3 Mode
(V
DD
= 3.3V ±5%, T
A
= -40°C to +85°C.)
PARAMETER MIN TYP MAX UNITS
Receive Sensitivity (Length of Cable) 900 1200 ft
Signal-to-Noise Ratio, Interfering Signal Test (Notes 1, 2) 10
Input Pulse Amplitude, RMON = 0 (Notes 2, 3) 1000 mVpk
Input Pulse Amplitude, RMON = 1 (Note 2, 3) 200 mVpk
Analog LOS Declare, RMON = 0 (Note 4) -24 dB
Analog LOS Clear, RMON = 0 (Note 4) -17 dB
Analog LOS Declare, RMON = 1 (Note 4) -38 dB
Analog LOS Clear, RMON = 1 (Note 4) -29 dB
Intrinsic Jitter Generation (Note 4) 0.03 UI
P-P
Table 17-11. 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) 900 1200 ft
Signal-to-Noise Ratio, Interfering Signal Test (Notes 1, 2) 12
Input Pulse Amplitude, RMON = 0 (Notes 2, 3) 1300 mVpk
Input Pulse Amplitude, RMON = 1 (Notes 2, 3) 260 mVpk
Analog LOS Declare, RMON = 0 (Note 4) -24 dB
Analog LOS Clear, RMON = 0 (Note 4) -17 dB
Analog LOS Declare, RMON = 1 (Note 4) -38 dB
Analog LOS Clear, RMON = 1 (Note 4) -29 dB
Intrinsic Jitter Generation (Note 4) 0.03 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 DS3154 receiver.
This spec indicates the lowest signal-to-noise ratio that results in a bit error ratio <10
-9 .
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 15 – 1 PRBS for DS3 and unframed 2 23 – 1 PRBS for E3.
Note 4: With respect to nominal 800mVpk signal for DS3 and nominal 1000mVpk signal for E3.