hsp50306 Intersil Corporation, hsp50306 Datasheet - Page 4

• Manufacturer Part Number: hsp50306
• Description: Digital Qpsk Demodulator
• Manufacturer: Intersil Corporation

NOTES:
BER
Acquisition Time
Carrier Loop Bandwidth
Bit Sync Loop Bandwidth
Throughput Delay
Carrier Frequency
Bit Rate
Modulation Format
Filtering
Input RMS Signal Level
Input Data Format
Input Clock Frequency
SINAD
Multipath Distortion
1. All frequencies are relative to the input clock frequency. For example, the bit rate is actually ~0.075936 * f
2. Each pair of input bits is encoded into a phase change relative to the previous symbol. In the HSP50306, the symbol to symbol phase
3. While the device is static CMOS and can be clocked down to close to DC, the specified range indicates the accuracy needed to maintain
in this document are only valid for a 26.97MHz or 25.6MHz clock.
change is decoded into the transmitted bit pair which is multiplexed into the output data stream.
the data rate inside the bit sync tracking loop bandwidth assuming 50ppm tx and 100ppm rx crystal accuracies.
SPECIFICATION
PARAMETER
Better than 1.0 x 10
Acquisition within 0.1s from applying an input signal with the specified characteristics.
10kHz
3kHz
Less than 6 output bit times.
10.7 x 10
2.048 x 10
QPSK w/differential encoding specified as:
00:
01: -90
Square root of raised cosine matched filtering ( = 0.4).
Set input p-p signal to full scale on the A/D converter.
6 bits, offset binary.
26.97MHz 0.015% (Note 3) for -27; 25.6MHz 0.015% for -25.
>25.5dB SNR (thermal (AWGN)), >28dB (adjacent channel interference).
Total energy in multipath distortion -10dBc
>95% of multipath energy within 2 s from main path. If the multipath changes rapidly, the bit error rate
may exceed the above specification until the equalizer has readjusted.
TABLE 2. INPUT SIGNAL CHARACTERISTICS (NOTE 1)
0
o
o
TABLE 1. PERFORMANCE SPECIFICATIONS
6
phase change
phase change
6
40kHz.
0.01%.
-
9
with specified input signal characteristics. See Figure 1.
HSP50306
8-275
10: +90
11: 180
o
o
phase change
phase change (Note 2)
PERFORMANCE
SPECIFICATION
CLK
. The frequencies provided