Using The Tam; Test Equipment; Adjustment Indicator - HP 8560E Service Manual

Adjustment Procedures

Using the TAM

Using the TAM
The HP 85629B TAM can be used to perform approximately half of the
HP 8560E/EC adjustment procedures. Table 2-4 on page 58 lists the
TAM adjustments and their corresponding manual adjustments.
The TAM adjustments do not include procedures for choosing
factory-selected components. If an adjustment cannot be made and a
factory-selected component must be changed, refer to the corresponding
manual adjustment.
To select an adjustment, press to display the TAM main menu,
MODULE
then press . Position the pointer next to the desired adjustment
ADJUST
using either the knob or step keys. Press , then follow the
EXECUTE
instructions displayed on the screen.

Test Equipment

During the TAM adjustments, instructions for setting test equipment
controls are displayed, with the exclusion of the test listed below. Test
equipment for this adjustment is controlled automatically.
Test 8. Low Band Flatness
Table 2-5 on page 58 lists the test equipment needed to perform each
TAM adjustment. Required models must be used. Substitutions may be
made for recommended models. Substitute sources must operate over
the frequency ranges indicated. Recommended substitutes are listed in
the Configuration Menu. If you must substitute the source with a
user-defined model, the adjustments run faster using a synthesized
source rather than an unsynthesized source.
When connecting signals from the HP 8340A/B (or any microwave
NOTE
source) to the adjustment setup, use a high frequency test cable with
minimum attenuation to 2.9 GHz. HP part number 8120-4921 is
recommended for its ruggedness, repeatability, and low insertion loss.

Adjustment Indicator

To aid in making adjustments, the TAM displays an "Analog Voltmeter
Display Box" along the left-hand side of the display. A horizontal line
moves inside the box to represent the needle of an analog voltmeter. A
digital readout appears underneath the box. Tick marks are often
displayed on the inside edges of the box indicating the desired needle
position. (The tick marks and needle are intensified when the needle is
within this acceptable region.) During some adjustments, an arrow
appears along the right edge of the box. This arrow always indicates the
highest position the needle has reached. The arrow is useful when a
Chapter 2 57