73M2901/5V Advanced Single Chip Modem 7
ELECTRICAL SPECIFICATIONS (continued)
TRANSMITTER
PARAMETER CONDITIONS MIN NOM MAX UNIT
Gain Adjust
Tolerance By step -0.3 0 0.3 dB
Transmit Gain Boost SFR 96h bit 1 (TXBOOST) = 1 4.8 5.1 5.4 dB
Total Harmonic
Distortion (THD) 1Khz sine wave at output (TXAP-TXAN)
1.5Vpk(2.7dBm) for Vref=1.25V
2.4Vpk (6.8dBm) for Vref=2.25V
THD = 2nd and 3rd harmonic.
-50 dB
each unwanted
frequency
component
-33
dB
Intermod Distortion At output (TXAP-TXAN)
1.0kHz, 1.2 kHz sine waves summed
2.0Vpk for Vref=1.25V
2.4Vpk for Vref=2.25V
Refer to CTR21 specification for complete
description of requirements
sum of
unwanted
frequency
components in
pass band
-20
dB
below
low
tone
Power Supply
Rejection Ratio -30 dBm signal at VPA
300Hz – 30kHz. Measured TXAP to TXAN.
30.0
dB
RECEIVER
PARAMETER CONDITIONS MIN NOM MAX UNIT
Carrier Detect On Tip and Ring -43.0 dBm01
Carrier Detect Off Tip and Ring -48.0 dBm01
Carrier Detect Hysteresis Tip and Ring 2.0 dB
Receive Level Tip and Ring -43.0 -9.0 dBm01
Idle Channel Noise 0.2kHz - 4.0kHz -70 -65 dB