Mixer Operational Check - HP 85325A Operating And Service Manual

NOTE
NOTE
Installation

Mixer Operational Check

Mixer Operational Check
indicate a front-panel key or computer keyboard.
[Brackets]
indicate a display softkey selection.
{Braces}
When installing the mixers, connect the 3.5 mm cables to the test/reference
modules before connecting them to the mixers. This will minimize the
danger of an electrostatic discharge damaging the mixers.
1. Make sure the equipment is connected as shown in Figure 1-5 on
page 1-12.
2. Press:
STIMULUS
[MENU] {STEP}
3. Enter the start and stop frequencies of your millimeter band.
4. Make sure averaging is OFF by pressing:
RESPONSE
[MENU] {AVERAGING OFF}
5. Measure the a1 input as follows:
If using an HP 8510, press:
PARAMETER
[MENU] {USER 1 a1}
If using an HP 8530, press:
PARAMETER
[MENU]
{SERVICE PARAMETERS}
{SERVICE 1 a1}
The signal you are measuring is from the coupled arm of the directional
coupler.
6. Set the display reference value so the trace is centered vertically:
Press and turn the rotary knob.
[REF VALUE]
7. Write down the reference value, you will need it later in this procedure:
REF VALUE = ____________________________
8. Set display scale to 1 dB/division, press:
[SCALE] [1] [x1]
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