78Q2132 TDK Corp., 78Q2132 Datasheet - Page 30

• Manufacturer Part Number: 78Q2132
• Description: 1/10base-t Homepna/ethernet Transceiver
• Manufacturer: TDK Corp.

78Q2132
1/10BASE-TX
HomePNA/Ethernet Transceiver
ELECTRICAL SPECIFICATIONS
The output power spectrum meets the spectral mask of Figure 8 – HomePNA PSD Mask with a termination of 100
ohms and back-to-back Ethernet packets of 1518 bytes length with random data. The resolution bandwidth shall
be 100 kHz. The specified PSD levels include thermal noise. The power level requirements below 1.1 MHz allow
1M8 PHY stations to interoperate with G.dmt and G.lite modems.
Two power operating modes are defined, LOW_POWER and HIGH_POWER. The maximum Power Spectral
Density (PSD) levels for the modes are defined in Figure 8 – HomePNA PSD Mask. For applications interfacing to
the PSTN, the power levels of FCC Part 68 shall not be exceeded.
HomePNA Transmitter
PARAMETER
Transmit Level – High Power
TX_PEAK_V
Transmit Level – Low Power
TX_PEAK_V
Out-of-Band Level @ 1.2Mhz
INBAND_PSD
dBm/Hz
-140
15 kHz
Power Mode
LOW_POWER
HIGH_POWER
Max
INBAND_
PSD
(dBm/Hz)
-62
-56
Table 1 – HomePNA Power Spectral Levels
Figure 8 – HomePNA PSD Mask
(continued)
CONDITION
At line output of
HomePNA device with
100ohm load
connected
same
Nom transmit signal
Min
attenuation at
> +/- 3.5 MHz
from carrier
30 dB
30 dB
560 kHz
30
MAX PSD
below 560
kHz
dBm/Hz
-140
-140
5.5
Acceptable
region
MIN
0.5
-80
MAX PSD
below 1.2
MHz
dBm/Hz
-135
-135
1
9.5
NOM
1.2
0.6
MAX PSD
above 40
MHz
dBm/Hz
-135
-135
40
MAX
1.4
0.7
45 MHz
MHz
-135
UNIT
Vpk
Vpk
dB