AM79C202 Legerity, AM79C202 Datasheet - Page 24

• Manufacturer Part Number: AM79C202
• Description: (AM79C202 / AM79212) PCM CODEC
• Manufacturer: Legerity

Group Delay Distortion
For either transmission path, the group delay distortion is within the limits shown in Figure 2. The minimum value of
the group delay is taken as the reference. The signal level should be –10 dBm0.
Single Frequency Distortion
The output signal level, at any single frequency in the range of 300 Hz to 3400 Hz, other than that due to an applied
0 dBm0 sine wave signal with frequency f
0 to 300 Hz and 3400 Hz to 12 kHz, any generated output signals other than f
specification is valid for either transmission path.
Intermodulation Distortion
Two sine wave signals of different frequencies f1 and f2 (not harmonically related) in the range 300 Hz to 3400 Hz
and of equal levels in the range –4 dBm0 to –21 dBm0 will not produce 2 • ( f1 – f2) products having a level greater
than –42 dB relative to the level of the two input signals.
A sine wave signal in the frequency band 300 Hz to 3400 Hz with input level –9 dBm0 and a 50 Hz signal with input
level –23 dBm0 will not produce intermodulation products exceeding a level of –56 dBm0. These specifications are
valid for either transmission path.
24
Delay (µs)
420
150
90
0
Figure 2. Group Delay Distortion
Am79212/Am79C202 Data Sheet
0
in the same frequency range, is less than –46 dBm0. With f
500 600
1000
ASLAC Device Specification
(Either Path)
Frequency (Hz)
2600 2800
0
are less than –28 dBm0. This
0
swept between