HP 8924E, Assembly

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Chapter 9, HP 8924C/E Specifications
CDMA Generator Specifications
N:\mkt\MANUALS\HP8924C\ALR\specs.fb
Individual Channel Amplitude Resolution
• 0.01 dB.
Relative CDMA Channel Level Accuracy
• AWGN to Traffic Channel: < 0.2 dB
±
5° C from last temperature at which PCB_CAL
was run for values of E
b
/N
t
from 1 dB to 10 dB.
• Between any two CDMA Channels: < 0.2 dB
±
5° C from last calibration temperature
at which PCB_CAL was run.
CDMA Modulation
Modulation Type
• QPSK per TIA IS-95.
Residual
ρ
(rho)
• Better than 0.97, typically > 0.98.
Carrier Feedthrough
• Better than
−
30 dBc, typically better then
−
34 dBc from +10° C to +40° C.
Adjacent Channel Spectral Purity
• <
−
45 dBc in a 30 kHz bandwidth at ±895 kHz offset from carrier frequency relative to
the total carrier power in a 1.23 MHz bandwidth.
Data Rate Transmission Modes
• IS-95 defined Base Station modes including full rate, half rate, quarter rate, one-eighth
rate data transmission, and variable rate with equally weighted, randomly spaced
occurrences of each rate.
Data Generator Patterns
• Pseudo-random data (CCITT 2
15
−
1 pattern).