Atec Spirent-TAS5600 - Manual (Page 5)

5 TAS5600 Universal Interference Emulator
TRACE A: Ch1 Spectrum
-50
dBm
LogMag
10
dB
/div
-150
dBm
Center: 2 GHz Span: 60 MHz
User’s
Signal
CW
Interferer
Modulated
Interferer
Purity
When testing the interference performance
of a receiver, undesired spurious signals can
reduce the confidence in test results. In
interference tests, a signal with an amplitude
much higher than the desired signal is placed
adjacent to the receiver’s channel. The
purpose of the test is to determine whether
the receiver’s adjacent channel selectivity is
sufficient. The value of this test can be
degraded if the phase noise of the CW signal
or the ACLR of the modulated signal is too
high. The TAS5600 has been specifically
designed to offer:
■ Ultra-Low Phase Noise
■ Excellent ACLR Performance
The TAS5600 exceeds the phase noise
and ACLR requirements of popular receiver
test standards. Using the TAS5600 for receiver
testing assures that the adjacent channel
performance of the receiver is being tested
with equipment that will deliver ultra clean,
accurate channel conditions thus giving
confidence in the test results.
Realism
Both narrow and wideband interference are
present in the radio environment and must
be simulated as interference during receiver
testing.
The TAS5600 delivers signals for co-
channel and adjacent channel testing that are
realistic. Simultaneous generation of different
interferer types reflects real-world scenarios.
Further, the data that is used to generate the
user channels that are modulated onto the
interfering carrier has a long repetition interval.
This combination of long data repetition
interval along with ultra-low phase noise and
low ACLR combine to make the TAS5600 the
highest performing, most realistic test set for
receiver co-channel and adjacent channel
testing.
TAS5600 with the Low Phase Noise Option demonstrates
extremely low phase noise, eliminating co-channel noise
during adjacent channel testing scenarios.