HP 70000 series, Руководство пользователя

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HP 70908A RF Section
The HP 70908A RF section oers preselected, fundamental mixing from 100 Hz to 22 GHz. The
preselector inside the HP 70908A RF section does not require peaking.
Rear-P anel P orts
Figure B-22. HP 70908A RF Section
1st LO IN receives the 3.0 to 6.6 GHz signal generated by the HP 70900B local oscillator
source .
1st LO OUT (rst local oscillator output) is the 3.0 to 6.6 GHz signal generated by the
HP 70900B local oscillator source . The frequency depends on the spectrum
analyzer measurement range or the settings of the
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LO OSC START and
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LO OSC STOP keys .
TUNE SP AN input is a voltage ramp with varying slope and dc level that is generated by
the HP 70900B local oscillator source . The ramp assists in the control of the
preselector in the HP 70908A RF section. The ramp also controls the tuning
frequency of the tracking generator , external mixer interface , or preselector
modules , if they are in the system. 321.4 MHz OUT has a bandwidth of about
30 MHz.
300 MHz IN receives the 300 MHz signal from the HP 70900B local oscillator source for
phase locking.
21.4 MHz OUT is the 21.4 MHz IF signal, which is routed to the IF section for ltering and
detection.
B-30 Input and Output P orts