AK2504A Datasheet, PDF (15/30 Pages) List of Unclassifed Manufacturers – DS3/STS-1/ES Transceiver

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