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Atec Agilent-E4406A User Manual

Page 16

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16

Transmit power measurement

The transmit power measurement determines the average
power for an RF signal burst at or above a user specified
threshold value. The threshold value may be absolute, or
relative to the peak value of the signal.

Transmit power

GMSK modulation (GSM)

Carrier power range at

+30dBm(1W) to –60 dBm

Absolute power accuracy +30 to –40dBm at RF input
for in-band signal
(excluding mismatch error)

+18 to 30 °C

±0.6 dB (±0.4 dB, typical)

0 to +55 °C

±0.9 dB

Relative power accuracy

±0.25dB (±0.1dB, typical)

(same channel, different
transmit power, input
attenuator fixed), input
level change 0 to –76 dB

Resolution

Displayed

0.01dB

Remote query

0.001dB

Instrument repeatability

±0.05 dB (nominal)

Phase and frequency error measurement

Phase and frequency error measures the modulation
quality of a GSM transmitter. Phase and frequency error
can be displayed both numerically and or graphically. A
binary representation of the demodulated data bits is also
available.

Phase and Frequency

GMSK modulation (GSM)

Error

Specifications based on
3GPP essential conformance
requirements, and are based
on 200 bursts.

Carrier power range

+27 to –45 dBm (nominal)

at RF Input

Phase error

Floor (RMS)

<0.5°

Accuracy (RMS)

±0.5°
(phase error range 1° to 15°)

Peak phase error

Floor

<1.5°

Accuracy

±2.0°
(phase error range 3° to 25°)

Frequency error

Accuracy

±5 Hz + (transmitter frequency
x frequency reference
accuracy)

I/Q offset

Range

–15 to –50 dBc (nominal)

Burst sync time

±0.1 bit (approx. ±0.4 µs)

uncertainty

Burst sync

Source

Training sequence, RF
amplitude, external rear, none.
Actual available choices
dependent on measurement.

Training sequence code

GSM defined 0 to 7 auto
(search) or manual

Burst type

Normal (TCH and CCH), Sync
(SCH), Access (RACH)

In-band frequency range

Down band GSM

400 to 500 MHz

GSM 900, P-GSM

890 to 915 MHz
935 to 960 MHz

GSM 900, E-GSM

880 to 915 MHz
925 to 960 MHz

DCS 1800

1710 to 1785 MHz
1805 to 1880 MHz

PCS1900

1850 to 1910 MHz
1930 to 1990 MHz

GSM 450

450.4 to 457.6 MHz
460.4 to 467.6 MHz

GSM480

478.8 to 486 MHz
488.8 to 496 MHz

GSM850

824 to 849 MHz
869 to 894 MHz