DS33R41 Maxim Integrated Products, DS33R41 Datasheet - Page 99
DS33R41
Manufacturer Part Number
DS33R41
Description
Network Controller & Processor ICs Inverse-Multiplexing Ethernet Mapper wit
Manufacturer
Maxim Integrated Products
Datasheet
1.DS33R41.pdf
(335 pages)
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10.20.2.1 Receive Level Indicator and Threshold Interrupt
The device reports the signal strength at RTIP and RRING in 2.5dB increments through RL3–RL0 located in
Information Register 2 (TR.INFO2). This feature is helpful when trouble-shooting line-performance problems. The
device can initiate an interrupt whenever the input falls below a certain level through the input-level under-threshold
indicator (TR.SR1.7). Using the RLT0–RLT4 bits of the TR.CCR4 register, the user can set a threshold in 2.5dB
increments. The TR.SR1.7 bit is set whenever the input level at RTIP and RRING falls below the threshold set by
the value in RLT0–RLT4. The level must remain below the programmed threshold for approximately 50ms for this
bit to be set. The accuracy of the receive level indication is ±1 LSB (2.5dB) from +25°C to +85°C and ±2 LSBs
(5dB) from –40°C to +25°C.
10.20.2.2 Receive G.703 Synchronization Signal (E1 Mode)
The transceiver is capable of receiving a 2.048MHz square-wave synchronization clock as specified in Section 13
of ITU G.703, October 1998. In order to use the device in this mode, set the receive synchronization clock enable
(TR.LIC3.2) = 1.
10.20.2.3 Monitor Mode
Monitor applications in both E1 and T1 require various flat gain settings for the receive-side circuitry. The device
can be programmed to support these applications through the monitor mode control bits MM1 and MM0 in the
TR.LIC3 register
Figure 10-6. Typical Monitor Application
(Figure
T1/E1 LINE
10-6).
Rm
MONITOR
PORT JACK
Rm
PRIMARY
T1/E1 TERMINATING
DEVICE
99 of 335
X
F
M
R
SECONDARY T1/E1
TERMINATING
DEVICE
Rt
T1/E1
XCVR
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