AK2504A Просмотр технического описания (PDF) - Asahi Kasei Microdevices

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AK2504A

DS3/STS-1/E3 Transceiver

Asahi Kasei Microdevices 

ASAHI KASEI

[AK2504A]

Equalization

DS3/STS1

The incoming data may have the loss of cable and/or flat. Cable type and length from the cross-connect are

specified as shown in Table 8. Equalizer compensates appropriately for a nominal DSX-3/STS-1 pulse as

attenuated by 450 feet of 728A cable.

Parameter

Cable Type

Cable Length

Table 8 DS3/STS-1 Cable Specification

Specification

Type 728A coaxial cable (or equivalent)

0 – 450 feet (from DSX-3 point)

Remarks

Fig.7–(1)(2)

E3

The incoming data may have the cable loss as shown in Table 9. Equalizer compensates appropriately for a

nominal E3 pulse as attenuated by the cable.

Parameter

Cable Loss

0 – 12dB

Table 9 E3 Cable Specification

Specification

Remarks

Fig.7–(1)(2)

Equalizer Bypass

If the incoming signal is attenuated by flat loss only (zero cable loss), the internal equalizer should be bypassed

with EQDIS=1. The level of the incoming signal should satisfy the RIN input range (50mVpk - 1000mVpk for

DS3/STS-1, 90mVpk - 1200mVpk for E3).

Table 10 Equalizer Bypass Control

EQDIS

0

1

Equalizer

Enable

Bypass

(1)Cable loss + Flat loss

DS3 : DSX-3

STS-1 : DSX-3

E3 : Transmitter Port

Flat Loss

Cable

0 - 6dB

DS3 :0 – 450 feet

STS-1:0 – 450 feet

E3 :0 – 12 dB

(2) Flat loss only

Transmitter

Flat Loss

Monitoring

circuit

AK2504

EQDIS

0

Equalizer enable

AK2504

EQDIS

1

Equalizer bypass

Fig. 7 AK2504A Application

MS0143-E-01

- 15 -

2004/01

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