PC User Interface
Test Mode Page
38
E1852B Operating Guide
6. RF Level
The RF power level in the test set transmit direction can be adjusted
for sensitivity measurements. The power level is continuously variable
from –85 to 0dBm in 1dB increments. The power level can be entered
directly in the
RF Level [dBm]
field or adjusted by moving the
RF
Level
slider.
7. Impairments
In this panel you can select signal impairments. Enabled only in
Loopback
Mode, you can adjust the
Modulation Index
and the
Frequency Offset
to determine the DUT tolerance of poor transmitter
performance. Modulation index values range from 0.28 to 0.35 while
frequency offset range is ±75 kHz.
8. Meas. Averaging Factor
You can choose to make measurements on single packets or average the
results over a number of packets up to a maximum of 999. A lower
number updates the measurement more frequently. The default setting
of 1 is often the optimum value.
9. DUT Mode
In this panel you can choose
Loopback
or
Transmitter Test
. Choosing
Loopback
mode enables
Bit Error Rate (BER)
measurements.
Various modulation patterns (
Modulation
panel) are available when
Transmitter Test
mode is selected. In this mode the test set instructs
the DUT to transmit the specified patterns. You can specify your own
data payload by entering hexadecimal pairs in the
User Defined
Payload
edit line only when in Loopback mode with Data Whitening
off.
All modulation patterns are avilable in
Loopback
but
Data Whitening
can only be applied to the
SPSR
data payload.
N O T E
Not all devices support this function.
E1852-90007.book Page 38 Monday, February 4, 2002 2:09 PM
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