Rainbow Electronics DS2186 - Manual (Page 7)

DS2186
041295 7/11
CHARACTERISTICS OF T1 AND CEPT INTERFACES Table 3
CHARACTERISTIC T1 CEPT
LINE RATE 1.544 MHz 2.048 MHz
LINE CODE AMI 1 or B8ZS AMI or HDB3
TEST LOAD IMPEDANCE 100 ohm Resistive 120 ohm Resistive (wire pair)
75 ohm Resistive (coax)
NOMINAL PEAK
VOLTAGE 2.4V to 3.6 V 2 3.0V (wire pair)
2.37V (coax)
PULSE SHAPE –Scaled to fit templates shown–
NOMINAL PULSE WIDTH 324 ns 244 ns
PULSE IMBALANCE < 0.5 dB difference between
total power of positive and
negative pulses. 1) Negative peak = positive peak ± 5%
2) Positive width at nominal half ampli-
tude = negative width at nominal half
amplitude
±
5%.
NOTES:
1. With a ones density of at least 12.5% and no more than 15 consecutive zeros.
2. Measured at the cross–connect (DSX–1) point; CSU applications may be 7.5 to 15 dB below these levels.