Rainbow-electronics DS2186 Manuale Utente Scaricare il pdf (Pagina 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

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

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.

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Rainbow-electronics DS2186 Manuale Utente Pagina 7