PEF22558EV11GXP Lantiq, PEF22558EV11GXP Datasheet - Page 46

• Manufacturer Part Number: PEF22558EV11GXP
• Manufacturer: Lantiq

Specifications of PEF22558EV11GXP

• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Compliant

10.2
Shorts between XL1 and XL2 cannot be detected. A short between XL1 and XL2 will not
ham the device.
10.3
The transmitter includes a programmable pulse shaper to generate transmit pulse masks
according to:
•
•
The transmit pulse shape (U
•
•
To reduce the crosstalk on the received signals in long haul applications the
OctalFALC
data path. This is used only in T1 mode. LBO attenuation is selectable with the values 0,
-7.5, -15 or -22.5 dB (register bits LIM2.LBO(2:1)). ANSI T1. 403 defines only 0 to -15 dB.
10.3.1
After reset XPM2.XPDIS is zero so that QuadFALC
selected. The default setting after reset for the registers XMP(2:0) generates the E1
pulse shape, see
exists. So after switching into T1 mode, an explicit new programming as described in
Table 15
If LBO attenuation is selected, the programming of XPM(2:0) will be ignored. Instead the
pulse shape programming is handled internally: The generated pulse shape before LBO
filtering is the same as for T1 0 to 40 m.
The given values are optimized for transformer ratio: 1 : 2.4 and cable type AWG24 using
transmitter configurations listed in
configurations with R
Delta Sheet
For T1: FCC68; ANSI T1. 403 1999, figure 4; ITU-T G703 11/2001, figure 10 (for
different cable lengths), for measurement configuration were R
For E1: ITU-T G703 11/2001, figure 15 (for 0 m cable length) ; ITU-T G703 11/2001,
figure 20 (for DCIM mode), for measurement configuration were R
= 75
By the registers XMP(2:0) compatible to the QuadFALC
XPM2.XPDIS is cleared,
or by the registers TXP(16:1), if the register bit XPM2.XPDIS is set.
is necessary.
TM
Transmit Line Monitor
Programmable Pulse Shaper and Line Build-Out
QuadFALC
offers the ability to place a transmit attenuator (Line Build-Out, LBO) in the
Table
load
16, but with an unreduced amplitude. No reset value for T1 mode
= 120
®
Compatible Programming
PULSE
and with R
) is programmed either
Table
46
load
14. The standardized measurement
= 100
are used.
®
compatible programming is
®
load
, if the register bit
Rev. 2.0, 2005-05-03
load
= 100
OctalFALC
= 120
PEF 22558 E
Line Interface
or R
load
TM