HP 70000 series, User Manual

Page: 379 / 447

Rear-P anel P orts
Figure B-17. HP 70905A RF section and HP 70905B RF section, Rear View
321.4 MHz IF
OUTPUT
is normally connected to the 321.4 MHz input. The output port may be used
for special applications . The port typically has a bandwidth greater than 30
MHz.
1st LO IN receives the 3.0 to 6.6 GHz signal from the HP 70900B local oscillator source .
1st LO OUT (rst local oscillator output) provides 3.0 to 6.6 GHz, depending on the
spectrum analyzer measurement range or the settings of the
N
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
LO OSC START
and
N NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
LO OSC STOP keys . The 3.0 to 6.6 GHz signal is generated by the
HP 70900B local oscillator source . 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 for routing to the IF modules for ltering and detection.
21.4 MHz IN receives the 21.4 MHz signal from the RF section.
B-24 Input and Output P orts