Owner manual

DS2151Q
022697 15/46
RESE RIR1.3 Receive Elastic Store Empty. Set when the receive elastic store buffer
empties and a frame is repeated.
SEFE RIR1.2 Severely Errored Framing Event. Set when 2 out of 6 framing bits (Ft or
FPS) are received in error.
B8ZS RIR1.1 B8ZS Code Word Detect. Set when a B8ZS code word is detected at
RPOS and RNEG independent of whether the B8ZS mode is selected or
not via CCR2.6.
FBE RIR1.0 Frame Bit Error. Set when a Ft (D4) or FPS (ESF) framing bit is received in
error.
RIR2: RECEIVE INFORMATION REGISTER 2 (Address=31 Hex)
(MSB) (LSB)
RL1 RL0 TESF TESE TSLIP JALT RPDV TPDV
SYMBOL POSITION NAME AND DESCRIPTION
RL1 RIR2.7 Receive Level Bit 1. See Table 4–1.
RL0 RIR2.6 Receive Level Bit 0. See Table 4–1.
TESF RIR2.5 Transmit Elastic Store Full. Set when the transmit elastic store buffer fills
and a frame is deleted.
TESE RIR2.4 Transmit Elastic Store Empty. Set when the transmit elastic store buffer
empties and a frame is repeated.
TSLIP RIR2.3 Transmit Elastic Store Slip Occurrence. Set when the transmit elastic
store has either repeated or deleted a frame.
JALT RIR2.2 Jitter Attenuator Limit Trip. Set when the jitter attenuator FIFO reaches
to within 4–bits of it’s limit; useful for debugging jitter attenuation operation.
RPDV RIR2.1 Receive Pulse Density Violation. Set when the receive data stream does
not meet the ANSI T1.403 requirements for pulse density.
TPDV RIR2.0 Transmit Pulse Density Violation. Set when the transmit data stream
does not meet the ANSI T1.403 requirements for pulse density.
DS2151Q RECEIVE T1 LEVEL INDICATION Table 4–1
RL1 RL0 TYPICAL LEVEL RECEIVED
0 0 +2 dB to –7.5 dB
0 1 –7.5 dB to –15 dB
1 0 –15 dB to –22.5 dB
1 1 less than –22.5 dB