Rainbow Electronics DS2182A User Manual
Page 15
DS2182A
041995 15/22
RECEIVE MULTIFRAME BOUNDARY TIMING Figure 16
RCLK
RPOS,
RNEG
RFSYNC
RMSYNC
RSIGSEL
RLCLK
RCHCLK
RLINK
RABCD
RSER
RSIGFR
CHANNEL 1
LSB
MSB
F
CHANNEL 2
CHANNEL 23
CHANNEL 24
CHANNEL 1
LSB
MSB
LSB
MSB
LSB
MSB
LSB
MSB
F
NOTES:
1. RLINK timing is shown for 193E; in 193S, RLINK is updated on even frame boundaries and is held across
multiframe edges.
2. Total delay from RPOS and RNEG to RSER output is 13 RCLK periods.
ALARM OUTPUTS
The transceiver also provides direct alarm outputs for
applications when additional decoding and demuxing
are required to supplement the onboard alarm logic.
RLOS OUTPUT
The receive loss of sync output indicates the status of
the receiver synchronizer circuitry; when high, an off-
line resynchronization is in progress and a high-low
transition indicates that resync is complete. The RLOS
bit (RSR1.3) is a latched version of the RLOS output. If
the auto-resync mode is selected (RCR1.1 = 0), RLOS
is a real-time indication of a carrier loss or OOF event
occurrence.
RYEL OUTPUT
The yellow alarm output transitions high when a yellow
alarm is detected. A high-low transition indicates the
alarm condition has been cleared. The RYEL bit
(RSR1.4) is a latched version of the RYEL output.