Anritsu Company VectorStar ME7848A-0171 Посібник із швидкого старту - Сторінка 7
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Consult the ME7848A Technical Data Sheet – 11410-01145 for more information on the amount of dynamic
range/noise floor improvement possible with the 'reversed' vs. the 'normal' coupler arrangement, but it is
generally on the order of 10 dB at low frequencies, decreasing to 0 dB slightly above 40 GHz.
Figure 4.
Rear Panel: 'Normal' (left) and 'Reversed' (right) Configurations
Figure 5.
Front Panel: 'Normal' (left) and 'Reversed' (right) Configurations
3.
System Check
Initial Settings
1. Begin with the VNA in a Preset state and then set up for the measurement:
a. Set test port power to +5 dBm (POWER Menu) for -0240 systems and -10 dBm for the -027x
systems.
b. Set IFBW to 100 Hz (AVERAGING menu).
c. Set the frequency range from 70 kHz to 40/70 GHz (for -0240 or -027x systems, respectively) with
201 points.
d. Set up one trace to display S21 in log mag form.
2. Connect the RF cables from the accessory kit to the VNA ports (uses the FF adapter on port 2).
3. Perform a full 2-port SOLT calibration of the VNA at the cable ends (see the VectorStar Calibration and
Measurement Guide if more information is needed on this).
4. Make all connections to form the opto-electronic system as outlined in the previous section (port 1 cable to
the E/O converter, port 2 cable to the O/E module, fiber patch cord between the E/O and O/E devices).
The O/E module should be powered up and warmed up. The E/O converter should be powered up but the
laser still off.
ME7848A QSG
PN: 10410-00777 Rev. B
3. System Check
QSG-7