Chapter 3 WCDMA Non-Call Mode
RF Generator
88 WCDMA Options Version 6.20
What it does The 4400 can be set up to generate a typical base station signal but without
supporting any exchange of signaling messages. The generator can be used to
test the receiver of the mobile phone in a special test (engineering) mode. It can
also be used to provide a frequency and timing reference which the phone may
require before transmitting any signal in test mode.
The channels transmitted by the 4400 generator are pilot channel, sync channel,
paging channel, physical channels, acquisition indicator channel and orthogonal
channel noise source (OCNS) channels. The respective level of each channel can
be set up in the Parameter menus. For further details on setting and modifying
system parameters please refer to “System parameters” on page 64.
Signal Generator
parameters
Depending on the modulation type selected in the Modulation field the RF
Generator Screen offers different parameter fields. The following sections first
describe the common parameter fields followed by the modulation-specific
fields.
Common parameter fields Band — Display field for the frequency band. This field is related to the
Frequency field and the UARFCN (UTRA Absolute Radio Frequency Channel
Number) field. After entering the frequency or the UARFCN the associated oper-
ating band (I, II, III, IV, V and VI) will be displayed here.
Freq — Entry field to set the output frequency of the RF generator.
Entry ranges: 430 to 500 MHz, 800 to 1000 MHz and 1700 to 2300 MHz in
increments of 10 Hz.
UARFCN — Entry field for the UTRA Absolute Radio Frequency Channel Number.
The UARFCN designates the carrier frequency. For information on the UARFCN
range supported please refer to section “UARFCN” on page 82. If you enter a new
value in this field, the Frequency field will be recalculated and the Band display
field will be updated.
Offset — Entry field for the offset from the channel frequency specified.
Entry range: –200 to 200 kHz in increments of 10 Hz.
Level — Entry field for the RF output power level of the RF generator. The output
signal will be available on the RF in/out connector.
Entry range: –120.0 to –10.0 dBm in increments of 0.1 dB.
NOTE
For details regarding WCDMA frequency ranges, check with section “WCDMA
frequency bands” on page 81.
NOTE
The level set on this entry field will only be correct when the load impedance
is 50 Ω.
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