176 Chapter 8
Hardware Options
Verifying Option 122 or 140, Wide Bandwidth Digitizer
Setting up the instrument in narrow band mode:
Press Meas Setup, IF Path, Narrow. This selects the “narrow band” or
standard IF Path through the A7 Analog IF and A8 Digital IF
assemblies.
The internal 50 MHz, -25 dBm calibrator tone should be displayed. The
noise floor will be less than -70 dBc.
If the problem exists in both IF paths, troubleshoot the narrow band
path since the instrument defaults to this path after a power cycle, and
it is easier to set up.
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