
Service Related Menus 8712ET/ES and 8714ET/ES
Service Utilities Menu 1 RF Network Analyzers
5-12 Service Guide
Service Utilities Menu 1
This menu allows manual control of several sections of the A4 source and A5 receiver
assemblies. This can be a helpful tool in troubleshooting these circuits.
CAUTION Most of these utilities are for factory use only. Modification of any values or
settings can result in improper operation or inaccurate results. If in doubt as
to the status of any settings, simply cycle the analyzer's line power. These
settings will then be defaulted to the correct values.
: Goes to the Measurement Calibration Options menu. From this
menu you can activate/deactivate the measurement calibrations and detector calibrations,
as well as access the View Array Master and View Array Interpolate menus (described in
detail later).
: Goes to the Analog Bus menu. (See following pages.)
: For Factory Use Only
: Results of several adjustments can be viewed by selecting this key.
While this information is designed for factory use and can vary considerably from unit to
unit, the date and time that the last adjustment was done or modified can be helpful
information. This is updated each time an adjustment is performed. However, this date
will be lost if the correction constants are not stored to EEPROM before power is cycled.
Date format is as defined under the menu, which is in the
menu.
, : These two selections are virtually identical and both
display the same data. Information displayed is the stored correction for the indicated
parameter. ES model analyzers have two arrays for some parameters: one for the forward
direction, and one for the reverse direction. The current measurement direction
determines which array is displayed. Assuming no adjustments have been performed since
power was cycled, these arrays represent the correction constants stored in EEPROM.
Viewing this data is useful in determining the measured raw performance of the analyzer,
as well as the quality of the adjustment procedure used to store the correction constant
data. Since this data represents the correction constants determined by performing the
adjustments, it is also an indication of how the adjustments were performed. If any of
these arrays show significant discontinuities, suspect either a hardware problem in the
analyzer, or a hardware problem in the equipment used to perform the adjustment.
Data displayed is always the full band correction regardless of the current start/stop
frequency settings. Absolute values are generally offset by a significant amount, so
meaningful information can only be derived from the relative values. Table 5-3 lists all of
the analyzer's 42 correction arrays along with a brief description and typical value ranges.
: Leads to the Service Utilities Menu 2 and Service Utilities Menu 3 which
allow you to manually control the ALC DAC, step attenuator, and LO power.
SYSTEM OPTIONS
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