Table of Contents
Advertisement
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."
The internal firmware of the PNA-X has not been modified for this option. The
NOTE
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
configuration dialog box, select Port 1 Reference Mixer Switch > External and press OK to
active the R1 Input path. See
The maximum attenuator power setting for the receiver attenuator is 35 dB. The
CAUTION
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
Table 1 on page
Prior to powering-up the booster amplifier, it is highly recommended that the user
CAUTION
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.
Refer to
To reduce risk of damaging the PNA-X or your device, reduce the initial power
CAUTION
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
N5245-90002 User's and Service Guide
Figure 30 on page
21.
Table 1 on page
21.
Figure 29 on page
33.
Table 3 on page
N5244/45AS Option H85
Operation
32. In the path
23.
5
Advertisement
Table of Contents
