FX829D2 CMLMICRO [CML Microcircuits], FX829D2 Datasheet - Page 28

• Manufacturer Part Number: FX829D2
• Description: Baseband Signal Processor
• Manufacturer: CMLMICRO [CML Microcircuits]

Baseband Signal Processor
Notes:
1997 Consumer Microcircuits Limited
FFSK Receiver
Signal Input Dynamic Range
Bit Error Rate
Receiver Synchronisation
Carrier Detect
Sensitivity
Probability of Carrier Detection
Miscellaneous Impedances
FILTER OUT
Tx Audio Input (MIC) (at 100Hz)
Xtal/Clock Input
'High' pulse width
'Low' pulse width
Input Impedance (at 100Hz)
Gain (I/P = 1mVrms at 100Hz)
- After Bit 16
- With 230mVrms Noise
Probability of Bit 16 being correct
1. At V
2. Not including any current drawn from the modem pins by external circuitry.
3. Small signal impedance, at V
4. Timing for an external input to the XTAL/CLOCK pin.
5. Between MIC or AMP1 inputs to Modulator and Audio outputs, see Figures 10a and 10b.
6. It is recommended that these output levels are used to produce 60% or 100% deviation in the
7. With the Tx Audio input level 20dB above the level required to produce 0dB at the
8. With output gains set to 0dB.
9. IRQN pin.
10. See Figure 13 (variation of BER with Input Signal Level).
11. SNR = Signal to Noise Ratio in the Bit Rate Bandwidth.
12. For a "10101010101 ...01" pattern.
13. Measured with a 150mVrms input signal (no noise).
14. dBp represents a psophometrically weighted measurement.
Currents measured at Tamb = 25°C only.
is suggested.
transmitter.
Output Drives.
(SNR = 20dB at 1200/2400 Baud)
Powersaved
Tx or Rx
DD
(SNR = 12dB at 1200 Baud)
(SNR = 12dB at 2400 Baud)
= 5.0V only. Signal levels are proportional to V
=
=
(SNR = 50dB)
(SNR = 12dB)
(SNR = 12dB)
(No Signal)
all functions disabled.
device configured into any half-duplex operating mode.
DD
= 5.0V and Tamb = 25°C. A minimum load resistance of 6k
Notes
10, 11
12, 13
28
11
11
11
12
4
4
Min.
100
10
40
40
10
20
-
-
-
-
-
DD
0.995
0.995
.
Typ.
0.05
230
2.5
1.5
1.0
600
-
-
1000
Max.
150
-
-
-
-
-
mVrms
mVrms
Units
10 -
10 -
10 -
M
M
dB
ns
ns
D/829/4
FX829
4
3
8