Technical data

Chapter 5 159
Adjacent Channel Power
Using the Adjacent Channel Power Measurement
Adjacent Channel Power
Using the RF OUT Loss field
The RF OUT Loss field is used when it is necessary to test the receiver sensitivity of
a typical base station. The test set’s source will typically go down to –90 dBm, in
order to reach –113 dBm for sensitivity testing, you must use an external attenuator.
The measured value of the attenuator and connecting cables are entered into this
field. This value is then used when this field is set to
On. When this field is set to
On, the test set will set the RF generator level to the correct level offset by the
external attenuator/cabling. When you set the RF Generator to –113 dBm (with the
RF OUT Loss field turned
On and the external attenuator/cabling loss value entered)
the output at the end of the RF test cabling is –113 dBm.
Example: If you want to set the signal generator to –113 dBm, the attenuator and RF
cabling measures 42.51 dB (measured with the 2 port insertion loss measurement
screen prior to this test), the RF OUT Loss field is turned
On (with the 42.51 dB loss
value entered). The actual RF output of the signal generator is –70.49 dBm, the
attenuator and RF cabling attenuated the signal to the desired level; so the RF signal
9 Set the RF output amplitude
a. [Amplitude]
b. Enter the amplitude value
using the numeric keypad.
c. [dBm].
You may also enter a new value for
amplitude by turning the rotary knob until the
desired value is displayed or using the up and
down arrow keys.
10 If you have previously stored
RF Out Loss from an
insertion loss measurement,
go to the next step.
Or
Press [RF OUT Loss] to
select
On and enter the RF
Out Loss value.
For information on the effects of the RF Out
Loss function on the amplitude, refer to
“Using the RF OUT Loss field”, below.
Each time you press this softkey, the selected
option changes.
11 Connect to the base station.
12 On [Enable Sig Gen] select
On.
Each time you press this softkey, the selected
option changes.
Step Notes