N5245-90002 User’s and Service Guide
5
N5244/45AS Option H85
Operation
Operation
The Option H85 can be configured differently for many applications. Included in this manual are
five typical configurations:
•
Figure 10, “2-Port, Two Way High Power Configuration.”
•
Figure 12, “4-Port, Four Way High Power Configuration.”
•
Figure 14, “2-Port, One Way High Power Configuration.”
•
Figure 16, “4-Port, One Way High Power Configuration.”
•
Figure 18, “2-Port Forward DUT Configuration.”
NOTE
The internal firmware of the PNA-X has not been modified for this option. The
power levels indicated on the N5244/45AS Option H85 may differ depending on
the user configuration that is chosen.
Refer to the configuration diagrams for external component connections and/or operating
constraints when utilizing the high power capability of the N5244/45AS Option H85. External
components are not supplied with this option.
When using the N5244/45AS Option H85 in the high power configuration (flow through R1
Loop), the analyzers R1 Input path must be set to External. In the
Trace/Chan
drop-down menu
select
Channel
>
Hard ware Setup
>
Path Config.
See
. In the path
configuration dialog box, select
Port 1 Reference Mixer Switch
>
External
and press
OK
to
active the R1 Input path
.
See
.
CAUTION
The maximum attenuator power setting for the receiver attenuator is 35 dB. The
PNA-X receiver step attenuators reduce the power to the A, B, C and D receivers.
Power measurements to test ports 1, 2, 3 and 4 above +35 dBm will require
additional attenuation. Add the appropriate amount of attenuation that will keep
the coupler arm output power below the maximum receiver inputs. Refer to
.
CAUTION
Prior to powering-up the booster amplifier, it is highly recommended that the user
verify the RF power levels seen by the various elements of the test setup. At high
power levels an incorrect power level could permanently damage the instrument.
.
CAUTION
To reduce risk of damaging the PNA-X or your device, reduce the initial power
setting to -65 dBm at the test port. The microwave PNA-X has 44 frequency
bands. The firmware turns off the RF power level during band-crossings. If you are
testing a high-gain device with an ALC when the PNA-X switches bands, the
power shuts down and the DUT ALC attempts to increase the gain. Microseconds
later the PNA-X power returns. However, in the short time frame the DUT or the
VNA may be damaged. The Band Crossings are listed in
Содержание N5244/45AS Option H85
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