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 = 2
nd
and 3
rd
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
dBm0
1
Carrier Detect Off
Tip and Ring
-48.0
dBm0
1
Carrier Detect Hysteresis
Tip and Ring
2.0
dB
Receive Level
Tip and Ring
-43.0
-9.0
dBm0
1
Idle Channel Noise
0.2kHz - 4.0kHz
-70
-65
dB
