Motorola StarTac ST7797 Bedienungsanleitung PDF herunterladen (Seite 12)

E7474A drive-test systems with Options 110 or 120 have

software functions for controlling the receivers. The system

supports any combination of receivers, up to a total of four.

Using multiple receiver configurations can greatly improve

drive-test efficiency for applications such as measuring at

850/1900 MHz borders, simultaneously measuring 850 and

1900 in overlay areas, simultaneously monitoring both for-

ward and reverse links, and monitoring competitive net-

works.

In multiple receiver configurations the receivers communi-

cate with each other via a high speed serial ring.

Communication with the PC is done via a single RS-232

link to one of the receivers in the ring.

Each receiver option includes:

• RF antenna for the corresponding frequency band

• Cable to connect to other receivers

• Cable to connect to PC

• Kit for mounting receiver in a vehicle

• AC/DC power supply

• Cigarette lighter power cord

• GPS antenna and cables (Options 310 and 330 only)

Agilent digital RF receiver specifications

(E7474A Options 300, 310, 320 and 330)

Frequency

Range

Options 300, 310 824-849 MHz [819-854]

869-894 MHz [864-899]

Options 320, 330 1850-1910 MHz [1945-1915]

1930-1990 MHz [1925-1995]

Frequency accuracy ± 1 ppm

With GPS time

synchronization ± .05 ppm characteristic

IF bandwidth 1.25 MHz characteristic

30 kHz characteristic

Aging of TCXO ± 1 ppm/year

Amplitude

Accuracy

1.25 MHz IF ± 1 dB; ± 0.5 dB typical

bandwidth (20 – 30 ∞C, -40 to -100 dBm)

± 2 dB (0 – 55 ∞C, -40 to -100

dBm)

30 kHz IF ± 1.5 dB; ± 0.5 dB typical

bandwidth (20 – 30 ∞C, -40 to -100 dBm)

± 2.5 dB (0 – 55 ∞C, -40 to -100

dBm)

Noise figure 8 dB typical

Internally generated

spurious -120 dBm

Maximum safe input

level +10dBm, 20V DC

characteristic

1 dB compression point -15 dBm characteristic

Adjacent channel

desensitization

-25 dBm typical

Adjacent channel

rejection

45 dB typical

Input/output

RF input 50 Ω type-N

1. Spectrum measurement allows tuning 5 MHz above and below frequency ranges. These extended ranges are shown in brackets–[]. The performance is not speci–

fied in these ranges. Characteristic noise floor increase is 2 dB with respect to specified range. Characteristic amplitude accuracy is unchanged with respect to

specified range.

2. Adjacent channel desensitization applies to the wideband mode (1.25 MHz IF filter) and is defined as 1 dB compression of tuned signal with interfering signal

+/-1.25 MHz from tuned signal.

3. Adjacent channel rejection applies to the narrowband mode (30 kHz IF filter) and is defined as: suppression of interfering signal +/-30 kHz from tuned signal.

Note: Specifications describe warranted performance over the temperature range of 0 to 55 °Celsius and include a 30-minute warm-up from ambient conditions.

Typical and characteristic information provide useful information by giving non-warranted performance parameters. Typical refers to test data at the fiftieth pecentile

for a 25 °Celsius room temperature. Characteristic information describes product information for parameters that are either not subject to variation, nonmeasur–

able, verifiable through functional pass/fail tests, or as a matter of routine not measured.