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Chapter 1 23
Signal Generator Overview
Rear Panel
21. I-bar OUT
This female BNC connector (E8267C only) can be used with an internal baseband generator (Option
002/602) to output the complement of the analog, in-phase component of I/Q modulation; on signal
generators without Option 002/602, this female BNC connector can be used to output the complement of the
in-phase component of an external I/Q modulation that has been fed into the I input connector.
I-bar OUT is used in conjunction with I OUT to provide a balanced baseband stimulus. Balanced signals are
signals present in two separate conductors that are symmetrical relative to ground and are opposite in
polarity (180 degrees out of phase). The nominal output impedance of the I-bar OUT connector is 50Ω,
dc-coupled.
22. Q OUT
This female BNC connector (E8267C only) can be used with an internal baseband generator (Option
002/602) to output the analog, quadrature-phase component of I/Q modulation; on signal generators without
Option 002/602, this female BNC connector can be used to output the quadrature-phase component of an
external I/Q modulation that has been fed into the Q input connector. The nominal output impedance of the
Q OUT connector is 50Ω, dc-coupled.
23. Q-bar OUT
This female BNC connector (E8267C only) can be used with an internal baseband generator (Option
002/602) to output the complement of the analog, quadrature-phase component of I/Q modulation; on signal
generators without Option 002/602, this female BNC connector can be used to output the complement of the
quadrature-phase component of an external I/Q modulation that has been fed into the Q input connector.
Q-bar OUT is used in conjunction with Q OUT to provide a balanced baseband stimulus. Balanced signals
are signals present in two separate conductors that are symmetrical relative to ground and are opposite in
polarity (180 degrees out of phase). The nominal output impedance of the Q-bar OUT connector is 50Ω,
dc-coupled.
24. BASEBAND GEN REF IN
This female BNC connector (E8267C only) is used with an internal baseband generator (Option 002/602);
on signal generators without Option 002/602, this female BNC connector is non-functional. This connector
accepts a 0 to +20 dBm sine wave or TTL square wave signal from an external timebase reference. This
external timebase reference clock is used by the internal baseband generator for both component and
receiver test applications (only the internal baseband generator can be locked to this external reference; the
RF frequency remains locked to the 10 MHz reference).
This connector accepts rates from 250 kHz through 100 MHz; the nominal input impedance is 50Ω. at
13 MHz, ac-coupled. The internal clock for the arbitrary waveform generator is locked to this signal when
external reference is selected in the ARB setup. The minimum pulse width must be > 10 ns. The damage
levels are > +8V and < −8V.