Cw Frequency Range In External Source Mode - HP 8753E User Manual

The frequency of the incoming signal should be within -0.5 to +5.0 MHz of the selected
n
frequency or the analyzer will not be able to phase lock to it.
CW Frequency Range in External Source Mode. 300 kHz to 3 GHz (6 GHz for Option 006)
Compatible Sweep Types. The external source mode will only function in CW time sweep.
If the instrument is in any other sweep type when external source is activated, the warning
message CHANGED TO CW TIME MODE will appear on the display.
External Source Requirements. The external source mode has spectral purity and power
input requirements, which are described in Chapter 7, "Specifications and Measurement
Uncertainties. n
Input Channel: R
Capture Range. In either automatic or manual mode, you can enter the frequency of the
actual signal must be within a certain frequency capture range as shown in l'hble 6-8.
If the incoming signal is not within the capture range, the analyzer will not phase lock
correctly.
Locking onto a signal with a frequency modulation component. Although the analyzer may
phase-lock onto a signal that has FM, it may not accurately show the signal's amplitude. The
accuracy of such measurements depends greatly on the IF bandwidth you choose. Use the
widest IF bandwidth available (3 kHz) if this problem occurs.
Tuned Receiver Mode
If you press @KJ ~~~~~~~~~~ .~~:~,~~~~, the analyzer receiver operates
independently of any signal source.
The following features and limitations apply to the tuned receiver mode:
It is a fully synthesized receiver; it does not phase-lock to any source.
n
It functions in all sweep types.
n
It requires a synthesized CW source whose timebase is input to the analyzer's external
n
frequency reference.
For more information on using the tuned receiver mode, refer to Chapter 2, "Making
Measurements '
. . . . . . . . . . . . . . . . . . . . . _. ,
cw Fkeqnency
0.6 to + 6 MHz of nominal CW frequency
Application and Operation Concepts