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HP 70427A/HP 70428A User’s Guide
10-33
Softkeys and Displays
AUTO ATTEN
AUTO ATTEN
This softkey triggers a one-time autoranging of the downconverter’s input
attenuator.
The downconverter autoranges by first setting the attenuator to its maximum
attenuation (35 dB) then reducing the attenuation in 5 dB steps until the
mixer’s (or RF AM detector’s) input level is between 0 and 5 dB below the
limit shown on the
Mixer Max Level:
(or
AM DET MAX Lvl:
) display. The
level is measured by the downconverter’s internal voltmeter. If no signal is
measured when the attenuation reaches 0 dB, the attenuator is reset to 35 dB.
Path
Amplitudes more 1 of 2 AUTO ATTEN
or,
AM Noise AUTO ATTEN
HP-IB command
DC:AMPL:INP:ATT AUTO
Figure 10-31
HP 70427A Downconverter
Summary of Contents for 70427A
Page 11: ...x HP 70427A HP 70428A User s Guide Declaration of Conformity ...
Page 13: ... xii HP 70427A HP 70428A User s Guide Typeface Conventions ...
Page 243: ...9 42 HP 70427A HP 70428A User s Guide Technical Data HP 70428A Option 002 Specifications ...
Page 299: ...10 56 HP 70427A HP 70428A User s Guide Softkeys and Displays IF Figure 10 42 μW Mode HP70472A ...
Page 385: ...10 142 HP 70427A HP 70428A User s Guide Softkeys and Displays YTF Cal ...
Page 435: ...12 14 HP 70427A HP 70428A User s Guide Remote Programming Commands ...
Page 607: ...15 10 HP 70427A HP 70428A User s Guide Adjustments 10 MHz Oscillator Adjustment ...
Page 611: ...16 4 HP 70427A HP 70428A User s Guide Customer Support ...