The LNA 6900 is a low noise amplifi er with 25 dB of gain
covering the nominal frequency range 9 kHz to 2 GHz and can be used up to 4 GHz.
With its high gain and low noise fi gure, it will signifi cantly increase the
sensitivity of virtually all spectrum analyzers and other RF measuring
instruments. All measuring instruments have a noise fi gure , which is a
measure of how good the instrument is at measuring low level signals, the lower
this fi gure, the better, although the lowest signal level will still be
governed by the measurement bandwidth. A typical spectrum analyzer may have a
noise fi gure of 20 dB or more, whereas a typical receiver may have a noise fi
gure of 10 dB. The preamplifi er has a noise fi gure of typically 4 dB, signifi
cantly enhancing the low level performance of such instruments, enabling signals
that were previously masked by noise to be seen.
The low noise amplifi er can be connected directly to the RF
input (N) of the spectrum analyzer or EMI-receiver. If the LNA 6900 is used with
the Teseq receiver SCR 35xx / SMR 45xx, the power supply is provided directly by
the receiver via the cable LE 237. Alternatively the power supply unit PSU 6000
can be used.
