DS3251/DS3252/DS3253/DS3254
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Table 17-F. Transmitter Output Characteristics—DS3 and STS-1 Modes
(VDD = 3.3V ±5%, TA = -40°C to +85°C.)
PARAMETER
MIN
TYP
MAX
UNITS
DS3 Output Pulse Amplitude, TLBO = 0 (Note 1)
700
800
900
mVpk
DS3 Output Pulse Amplitude, TLBO = 1 (Note 1)
520
700
800
mVpk
STS-1 Output Pulse Amplitude, TLBO = 0 (Note 1)
700
800
1100
mVpk
STS-1 Output Pulse Amplitude, TLBO = 1 (Note 1)
520
700
850
mVpk
Ratio of Positive and Negative Pulse-Peak Amplitudes
0.9
1.1
DS3 Power Level at 22.368MHz (Note 2)
-1.8
+5.7
dBm
DS3 Power Level at 44.736MHz vs. Power Level at 22.368MHz (Note 2)
-20
dB
Intrinsic Jitter Generation (Note 3)
0.02
0.05
UIP-P
Transmit Driver Monitor Minimum Threshold (VTXMIN), TLBO = 0
550
mVpk
Transmit Driver Monitor Minimum Threshold (VTXMIN), TLBO = 1
500
mVpk
Transmit Driver Monitor Maximum Threshold (VTXMAX), TLBO = 0
1050
mVpk
Transmit Driver Monitor Maximum Threshold (VTXMAX), TLBO = 1
800
mVpk
Note 1:
Measured on the line side (i.e., the BNC connector side) of the 2:1 transmit transformer (
Figure 2-1).Note 2:
Unframed all ones output signal, 3 kHz bandwidth, cable length 225 feet to 450 feet.
Note 3:
Measured with jitter-free clock applied to TCLK and a bandpass jitter filter with 10Hz and 800kHz cutoff frequencies. Not tested
during production test.
Table 17-G. Transmitter Output Characteristics—E3 Mode
(VDD = 3.3V ±5%, TA = -40°C to +85°C.)
PARAMETER
MIN
TYP
MAX
UNITS
Output Pulse Amplitude (Note 1)
900
1000
1100
mVpk
Pulse Width
14.55
ns
Ratio of Positive and Negative Pulse Amplitudes (at Centers of Pulses)
0.95
1.05
Ratio of Positive and Negative Pulse Widths (at Nominal Half Amplitude)
0.95
1.05
Intrinsic Jitter Generation (Note 2)
0.02
0.05
UIP-P
Transmit Driver Monitor Minimum Threshold (VTXMIN)
750
mVpk
Transmit Driver Monitor Maximum Threshold (VTXMAX)
1250
mVpk
Note 1:
Measured on the line side (i.e., the BNC connector side) of the 2:1 transmit transformer (
Figure 2-1).Note 2:
Measured with jitter-free clock applied to TCLK and a bandpass jitter filter with 10Hz and 800kHz cutoff frequencies. Not tested
during production test.