Zero Span If Output (Option 89) - Anritsu Field Master MS2070A Measurement Manual

3-3 Setting Frequency Parameters

Zero Span IF Output (Option 89)

Zero Span IF output effectively allows the spectrum analyzer to be used as a receiver front-end, converting the
input signal at the spectrum analyzer RF In connector to a signal centered at the IF output frequency. You can
then process the IF signal in a way that meets your needs. That may mean using an A-to-D converter or some
other signal processing method.
Zero Span IF Output provides an IF signal of 325 MHz with FFT capture bandwidth ≤ 32 MHz and 300 MHz
with FFT capture bandwidth = 100 MHz. The nominal RF output level is –4 dBm with a 10 MHz, –20 dBm
input, and with 0 dB input attenuation and preamp off. The spectrum can be inverted in certain RF input
bands. The IF output signal is present only when the spectrum analyzer span is set to ZERO SPAN and the
IF OUTPUT is toggled on (see
bandwidth of 750 kHz, 7.5 MHz, 14 MHz, 30 MHz, or 100 MHz using the
on page 3-7.
Note The selectable bandwidth values may differ among instrument models and options.
Table 3-1.
Selected IF Filter Bandwidth
100 MHz
30 MHz
14 MHz
7.5 MHz
750 kHz
The normal IF BW uses analog bandpass filters in the normal RBW chain. By changing the RBW, different
filter bandwidths are selected. While the IF bandwidth is influenced by the selection of RBW filters, the digital
RBW filters themselves are not used.
3-4
"FREQ / SPAN Zero Span Menu" on page
PN: 10580-00447 Rev. E
Spectrum Analyzer Measurements
3-7). You can select the IF output
"IF OUTPUT Menu (Option 89)"
IF Output Frequency
300 MHz
325 MHz
325 MHz
325 MHz
325 MHz
Spectrum Analyzer MG