B&B Electronics RS-232 to Ethernet Converter ES1A Especificaciones Pagina 40

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Si3216
40 Rev. 1.0
Not Recommended
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2.4.2. Sinusoidal Ringing
To configure the ProSLIC for sinusoidal ringing, the
frequency and amplitude are initialized by writing to the
following indirect registers: RCO, RNGX, and RNGY.
The equations for RCO, RNGX, RNGY are as follows:
where
and f = desired ringing frequency in hertz.
In selecting a ringing amplitude, the peak TIP-to-RING
ringing voltage must be greater than the selected on-
hook line voltage setting (VOC, direct Register 72). For
example, to generate a 70 V
PK
20 Hz ringing signal, the
equations are as follows:
In addition, the user must select the sinusoidal ringing
waveform by writing TSWS = 0 (direct Register 34,
bit 0).
2.4.3. Trapezoidal Ringing
In addition to the sinusoidal ringing waveform, the
ProSLIC supports trapezoidal ringing. Figure 22
illustrates a trapezoidal ringing waveform with offset
V
ROFF
.
Table 29. Registers for Ringing Generation
Parameter Range/ Description Register
Bits
Location
Ringing Waveform Sine/Trapezoid TSWS Direct Register 34
Ringing Voltage Offset Enable Enabled/
Disabled
RVO Direct Register 34
Ringing Active Timer Enable Enabled/
Disabled
RTAE Direct Register 34
Ringing Inactive Timer Enable Enabled/
Disabled
RTIE Direct Register 34
Ringing Oscillator Enable Enabled/
Disabled
ROE Direct Register 34
Ringing Oscillator Active Timer 0 to 8 s RAT[15:0] Direct Registers 48 and
49
Ringing Oscillator Inactive Timer 0 to 8 s RIT[15:0] Direct Registers 50 and
51
Linefeed Control (Initiates Ringing State)
Ringing State = 100
b
LF[2:0] Direct Register 64
High Battery Voltage 0 to –94.5 V VBATH[5:0] Direct Register 74
Ringing dc voltage offset 0 to 94.5 V ROFF[15:0] Indirect Register 6
Ringing frequency 15 to 100 Hz RCO[15:0] Indirect Register 7
Ringing amplitude 0 to 94.5 V RNGX[15:0] Indirect Register 8
Ringing initial phase Sets initial phase for
sinewave and period
for trapezoid
RNGY[15:0] Indirect Register 9
Common Mode Bias Adjust During Ringing 0 to 22.5 V VCMR[3:0] Indirect Register 27
Note: The ProSLIC uses registers that are both directly and indirectly mapped. A “direct” register is one that is mapped
directly. An “indirect” register is one that is accessed using the indirect access registers (direct registers 28 through
31).
RCO coeff 2
15
=
coeff
2f
1000 Hz
-----------------------


cos=
RNGX
1
4
---
1 coeff
1coeff+
------------------------ 2
15
Desired V
PK
0to94.5V
96 V
------------------------------------------------------------------------
=
RNGY 0=
coeff
2 20
1000 Hz
-----------------------


0.99211=cos=
RCO 0.99211 2
15
 32509 7EFDh===
RNGX
1
4
---
0.00789
1.99211
--------------------- 2
15
70
96
------
376 0177h===
RNGY 0=
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