T8503 ETC-unknow, T8503 Datasheet - Page 6

• Manufacturer Part Number: T8503
• Description: T8502 T8503 Dual Codecs With Filters
• Manufacturer: ETC-unknow

T8502 and T8503 Dual PCM Codecs with Filters
Transmission Characteristics
ac Transmission Characteristics
Unless otherwise noted, the analog input is a 0 dBm0, 1020 Hz sine wave; the input amplifier is set for unity gain.
The digital input is a PCM bit stream equivalent to that obtained by passing a 0 dBm0, 1020 Hz sine wave through
an ideal encoder. The output level is sin(x)/x-corrected.
Table 5. Absolute Gain
Table 6. Gain Tracking
Table 7. Distortion
6
Encoder Milliwatt
Decoder Milliwatt
Relative Decoder Gain
Transmit Gain Tracking Error
Receive Gain Tracking Error
Transmit Signal to Distortion
Receive Signal to Distortion
Single Frequency Distortion,
Single Frequency Distortion,
Intermodulation Distortion
Response (transmit
gain tolerance)
Response (receive
gain tolerance)
Variation Referenced
to DmW
Sinusoidal Input -Law/A-Law
Sinusoidal Input -Law/A-Law
Transmit
Receive
Parameter
Parameter
Parameter
Symbol
DmW
EmW
RGR
Symbol
Symbol
SFD
SFD
SD
SD
GT
GT
IMD
Signal input of 0.775 Vrms,
0.775 Vrms -law or A-law,
Decoder gain at –3.5 dB
R
R
X
X
PCM input of 0 dBm0
X
R
1020 Hz, RL = 10 k
Measured relative to
(continued)
-law or A-law
A-law –30 dBm0
A-law –40 dBm0
A-law –30 dBm0
A-law –40 dBm0
Transmit or receive, two frequencies
A-law 3 dBm0
-law –30 dBm0
-law –40 dBm0
(GS = 0)
A-law 3 dBm0
-law –30 dBm0
-law –40 dBm0
200 Hz—3400 Hz, 0 dBm0 input,
200 Hz—3400 Hz, 0 dBm0 input,
-law 3 dBm0
in the range (300 Hz—3400 Hz)
-law 3 dBm0
Test Conditions
–37 dBm0 to –50 dBm0
–37 dBm0 to –50 dBm0
output any other single
output any other single
+3 dBm0 to –37 dBm0
+3 dBm0 to –37 dBm0
frequency
frequency
Test Conditions
Test Conditions
at –6 dBm0
VF
VF
VF
VF
VF
VF
VF
VF
VF
VF
VF
VF
R
R
3400 Hz
3400 Hz
X
X
–40 C to +85 C –0.25
–40 C to +85 C –0.25
–40 C to +85 C –0.15
O
O
R
R
R
R
I
I
X
X
X
X
O
O
O
O
0 C to 85 C
0 C to 85 C
I
I
I
I
–30 dBm0
–30 dBm0
–30 dBm0
–30 dBm0
–40 dBm0
–45 dBm0
–40 dBm0
–45 dBm0
–40 dBm0
–45 dBm0
–40 dBm0
–45 dBm0
–0.25
–0.50
–0.25
–0.50
–0.20
–0.20
Min
Min
36
35
30
29
25
25
36
35
30
29
25
25
Min
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Lucent Technologies Inc.
Typ
Typ
Typ Max
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Data Sheet
0.20
0.25
0.20
0.25
0.15
Max
Max
0.25
0.50
0.25
0.50
–38
–40
–42
July 1998
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dBm0
dBm0
dBm0
dBm0
dBm0
dBm0
dBm0
Unit
Unit
Unit
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB