Agilent Technologies 8935 Series Uživatelský manuál stáhnout pdf (Strana 2)

Specifications describe the instrument’s warranted performance and are

valid over the entire operating/environmental range unless otherwise noted.

Supplemental Characteristics are intended to provide additional informa-

tion useful in applying the instrument by giving typical, but non-warranted

performance parameters. These characteristics are shown in italics or

labeled as “typical,” “usable to,” or “nominal.”

CDMA Signal Generator Specifications

Frequency Range: 800 MHz to 1000 MHz, and 1.7 GHz to 2.0 GHz

(usable 4 to 200 MHz)

Output Level Range:

RF IN/OUT: –120 dBm to –40 dBm

DUPLEX OUT: –120 dBm to –10 dBm

Output Level Accuracy:

RF IN/OUT: ±1.5 dB, Typically ±1 dB

DUPLEX OUT: ±1.5 dB, Typically ±1 dB

Modes: Noise only, data only, and user selectable E

settings

CDMA Signal Generator RF Level Accuracy

(when in E

mode): Typically ±1.5 dB

Modulation

Reverse Link Source Modulation: OQPSK per TIA IS-95

Reverse Link Source Modulation Data: Internal data buffer,

Idle (all zeroes)

Forward Link Source Modulation: QPSK per TIA IS-95

Forward Link Source Modulation Data: Internal (Pilot Channel)

Residual rho (r): Better than 0.96,

Typically better than 0.98

Carrier Feedthrough: Typically <–35 dBc

Adjacent Channel Noise: Typically <–50 dBc measured in a

30 kHz BW filter relative to the total carrier power at f

±900 kHz

for output levels <–40 dBm at the RF IN/OUT connector (<–10 dBm

when using the DUPLEX OUT connector)

Data Buffer

Size/Length: 1800 frames per data rate set

Modes: Single, Continuous Looping, and Idle

Coding: IS-95 CDMA full rate reverse link channel coding, inter-

leaving and spreading

Long Code Mask: 42 zeros

Input Data: 9600 bps and 14.4 kbps entered via GPIB

Data Source: For each data rate set there are 300 frames of ran-

dom data factory loaded, 1800 frames additional user definable

data which can be entered via GPIB.

AWGN Source

(Additive White Gaussian Noise)

Bandwidth: 2 MHz nominally

Distribution: Gaussian to >3 sigma

Resolution: 0.1 dB

Range: –5 to 25 dB

Accuracy: ±0.5 dB for E

of 5 to 20 dB, 25° C ±10° C,

Typically ±1 dB for E

of 0 to +5 dB and +20 dB to +25 dB

CDMA Analyzer Specifications

Average Power Measurement

Input Frequency Range: 30 MHz to 1000 MHz, and 1.7 to 2.0 GHz

Input Connector: RF IN/OUT only

Measurement Bandwidth: Provides an accurate measure of the

total power for signals within ±2 MHz of the operating frequency.

If other signals are present outside this frequency range, reduced

measurement accuracy will result.

Maximum Input Level: 15 W average for CDMA signals

Measurement Range:

4 mW to 15 W for f >100 MHz (+6 to +42 dBm)

4 mW to 1 W for f <100 MHz (+6 to +30 dBm)

Measurement Period: 0.25 ms to 26.66 ms

Figure 1. Average Power Measurement Accuracy

100%

80%

60%

40%

20%

0º C 10º C 20º C 30º C 40º C 50º C 60º C

32º F 50º F 68º F 86º F 104º F 122º F 140º F

Temperature

Relative Humidity

±(7.5% ±50 µW)

Typically ±5%

1.7 GHz≤f

≤2.0 GHz

±(12% ±50µW)

Typically 10%

≤1000 MHz

±(10% ±50 µW)

Typically ±7%

1 2 3 4 5 6 7 8

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