HP 70427A User Manual page 56

Figure 2-11 Connect Cable Diagram
If a signal greater than –10 dBm is present the input attenuator can be
autoranged. There are two ways to do this as described below.
To auto-range the input attenuator and IF amplifier gain at the same time:
1. Press the
2. Press the
To auto-range the input attenuator only:
1. Press the
2. Press the
3. Press the
The level set by auto-ranging depends on the level shown on the
display. This level is set by the
Level:
– 5 dBm the attenuator will be set so that the mixer input level is within
optimum range.
For input signal levels less than –10 dBm, the attenuator must be set
manually.
Step 4 - Adjust the IF gain if necessary
1. Press the
2. Press the
3. Press the
4. Enter an IF gain between –10 and +45 dB in 5 dB steps with the numeric
keypad.
5. Complete the entry by pressing the
To Downconvert a Signal Below 26.5 GHz
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Amplitudes
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AUTO RANGE
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Amplitudes
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AUTO ATTEN
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Amplitudes
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IF GAIN
HP 70427A/HP 70428A User's Guide 2-11
Getting Started
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MIXER MAX LVL
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dB
Mix Max