HP HP 8712ET, Руководство пользователя, Страница: 78 / 480

3-26 ET User’s Guide
Making Measurements
Measuring Transmission Response
Method B: Modify the Calibration Kit Definition of the
Through Standard.
With this method, it is only necessary to use one adapter. The DUT has
type-N(f) input and output connectors. The calibration kit
through-standard definition is modified to compensate for the adapter
and then saved as a user kit. However, the electrical delay of the adapter
must first be found.
NOTE
By convention, cal kit labels in the analyzer indicate the sex of the port
with which they are used. For example, the default cal kit for the
analyzer is type-N female because the front panel RF ports are female
(the calibration standards, in turn, have male connectors).
NOTE
For analyzers with 50 ohm input impedance only: in the 50 ohm type-N
calibration kit (HP 85032B), there are four equal adapters: two
APC-7-to-type-N(f), and two APC-7-to-type-N(m). To create the adapter
in the following example, connect two APC-7-to-type-N(f) adapters.
1. Connect a test cable with type-N(m) connectors to the REFLECTION
port.
2. Connect a test cable with type-N(m) connectors to the
TRANSMISSION port.
3. To select a calibration kit for the REFLECTION port, press
( or )
, and use the front panel knob or the keys to
highlight the REFLECTION port in the display’s table. Press
.
4. Press . Perform a one-port reflection
calibration using type-N(f) standards on the type-N(m) open-end of
the REFLECTION port test cable. Refer to
“Perform a One-Port
Reflection Calibration” on page 3-33 .
5. Connect the type-N female-to-female adapter to the type-N(m) open-
end of the REFLECTION port test cable.
6. Add a type-N(m) short to the open end of the adapter as shown in
Figure 3-10 .
PRESET
User Preset Factory Preset
CAL
More Cal
Cal Kit
Type-N(m)
MEAS 1
Reflection