Agilent Technologies 8753ET User Manual page 426

Operating Concepts
Knowing the Instrument Modes
Coupling Power Between Channels 1 and 2
COUPLE PWR ON off
can use the D2/D1 to D2 function in harmonic measurements, where the analyzer shows
the fundamental on channel 1 and the harmonic on channel 2. D2/D1 to D2 ratios the two,
showing the fundamental and the relative power of the measured harmonic in dBc. You
must uncouple channels 1 and 2 for this measurement, using the
COUPLED CHAN ON off
After uncoupling channels 1 and 2, you may want to change the fundamental power and
see the resultant change in relative harmonic power (in dBc).
allows you to change the power of both channels simultaneously, even though they are
uncoupled in all other respects.
Frequency Range
The frequency range is determined by the upper frequency range of the instrument or
system (3 or 6 GHz) and by the harmonic being displayed. The 6 GHz operation requires
an 8753ET/ES Option 006.
maximum frequency and harmonic mode.
Table 7-4 Maximum Fundamental Frequency Using Harmonic Mode
Harmonic
Measured
2nd Harmonic
3rd Harmonic
Accuracy and Input Power
Refer to the 8753ES and the 8753ET specifications and characteristics chapters of the
reference guide for recommendations on the maximum recommended input power and
maximum source power.
Using power levels greater than the recommended values may cause undesired harmonics
in the source and receiver. The recommended power levels ensure that these harmonics
are less than −45 dBc. Use test port power to limit the input power to your test device.
7-88
is intended to be used with the
softkey set to OFF to allow alternating sweeps.
Table 7-4 shows the highest fundamental frequency for
Maximum Fundamental Frequency
8753ET/ES
with Option 002
1.5 GHz
1.0 GHz
D2/D1 toD2 on OFF
COUPLE PWR ON off
8753ET/ES with
Option 002 and Option 006
3.0 GHz
2.0 GHz
softkey. You