Keysight Technologies FieldFox A Series, Руководство пользователя

Страница: 125 / 756

Keysight N9927-90001 User’s Guide 125
Calibration for NA, CAT, and VVM Modes
QuickCal (N991xA/2xA/3xA Only)
QuickCal is ideal for a quick and simple calibration of the measurement when
using a jumper cable or adapter to connect the DUT to the FieldFox test ports.
QuickCal corrects for phase shift, time delay, and loss of adapters or jumper
cables.
QuickCal does not require a specific Cal Kit and is a very simple calibration. If
the highest accuracy is required, a mechanical calibration with a high quality
calibration kit is recommended.
QuickCal is designed and most accurate when calibrating for DUTs fitted with
Type-N and 7/16 connectors.
If the DUT has different connectors, such as 3.5 mm (male) or SMA male
connectors, QuickCal can still be used by selecting 'Other' connector.
However, the accuracy of QuickCal with ‘Other’ connectors is not specified.
If the DUT has 3.5 mm-female or SMA-female connectors, QuickCal is NOT
recommended. For accurate and repeatable measurements of devices with
female 3.5 mm or SMA connectors, use mechanical calibration.
Important QuickCal Notes
— 7/16 connectors can be used with QuickCal ONLY up to 6 GHz.
— Type-N 75 Ohm can be used with QuickCal ONLY up to 3 GHz.
— QuickCal cannot be used with waveguides, or if the test fixture or test setup
(before DUT) includes an attenuator.
How to perform a QuickCal
— In CAT, NA, or VVM Mode, press Cal 5
— Then QuickCal
— Press Change DUT Connectors to select the correct connector types
that are on your DUT. Although there is no Cal Kit required, selecting
the connector type (limited to Type-N and 7/16) and gender from the
list provides an accurate OPEN model which means a more accurate
calibration. If the DUT connector type is not listed, select
Unknown/Other.
Source Unleveled errors - During calibration, the frequency range of the
measurement MAY be extended to provide maximum flexibility. During the
calibration, the output power may become unleveled at the added high
frequencies. You can ignore the “Source Unleveled” error, or to avoid the
error, select either High power or -15 dBm before calibrating. Learn more
about setting Output Power in “Output Power” on page 53