am79q02 ETC-unknow, am79q02 Datasheet - Page 13

• Manufacturer Part Number: am79q02
• Description: Quad Subscriber Line Audio-processing Circuit Qslac Devices
• Manufacturer: ETC-unknow

Transmission Characteristics
When relative levels (dBm0) are used in any of the following transmission specifications, the specification holds for
any setting of the GX gain from 0 dB to 12 dB and the GR loss from 0 dB to 12 dB.
Notes:
1. Also see Figure 1 and Figure 2.
2. 0 dBm0 input signal, 300 Hz to 3400 Hz; measurement at any other frequency, 300 Hz to 3400 Hz.
3. No single frequency component in the range above 3800 Hz may exceed a level of –55 dBm0.
4. The weighted average of the crosstalk is defined by the following equation, where C(f) is the crosstalk in dB as a function of
5. The End-to-End Group Delay is the sum of the transmit and receive group delays (both measured using the same time and
6. Typical values not tested in production.
A-law digital mW or equivalent (0 dBm0)
µ-law digital mW or equivalent (0 dBm0)
±22,827 peak linear coded sine wave
Gain accuracy, D/A or A/D
Gain accuracy digital-to-digital
Gain accuracy analog-to-analog
Attenuation distortion
Single frequency distortion
Idle channel noise
CrosstalkTX to RX
same channelRX to TX
Crosstalk between channels
End-to-end group delay
frequency, f
clock slot).
Analog out
Digital out
TX or RX to TX
TX or RX to RX
Average
Description
N
=
Table 1. 0 dBm0 Voltage Definitions with Unity Gain in X, R, GX, GR, AX, and AR
= 3300 Hz, f
20
Signal at Digital Interface
•
log
å
-------------------------------------------------------------------------------------------------- -
1
j
= 300 Hz, and the frequency points (f
10
---------------------------------------------------------
----- - C f
20
1
•
0 dBm0, 1014 Hz
Digital looped back
Digital input = 0
Digital input = 0
Analog V
Analog V
0 dBm0
0 dBm0
0 dBm0
B = Z = 0; X = R = 1
( )
j
AX = AR = 0 dB
AX = +6.02 dB and/or
AR = –6.02 dB
+
2
0 to 85
–40
0 to 85
–40
10
log
----- - C f
20
1
IN
IN
Test Conditions
°C
°C
•
æ ö
ç ÷
è ø
= 0 VAC
= 0 VAC
f
---- -
f
°C
°C
N
1
(
1014 Hz, Average
1014 Hz, Average
300 Hz to 3400 Hz
300 Hz to 3400 Hz
j 1
–
SLAC Products
300 Hz to 3 kHz
)
•
log
unweighted
weighted
æ
ç
è
-------- -
f
j 1
A-law
A-law
f
µ-law
µ-law
–
j
j
, j = 2..N) are closely spaced:
ö
÷
ø
Transmit
0.7804
0.7746
0.7804
–0.125
–0.25
–0.30
–0.30
–0.40
–0.25
–0.25
Min
Typ
0
0
Receive
0.7804
0.7746
0.7804
+0.125
Max
+0.25
+0.30
+0.30
+0.40
+0.25
+0.25
–46
–68
–55
–78
–68
–75
–75
–76
–78
678
12
16
dBm0p
dBm0p
dBrnc0
dBm0p
dBrnc0
Unit
dBm0
dBm0
dBm0
dB
µs
Unit
Vrms
Note
3, 6
3, 6
1
2
3
3
3
3
4
5
13