16 Agilent X-Series Signal Generators User’s Guide
Signal Generator Overview
Rear Panel Overview (N5171B, N5172B, N5181B, & N5182B)
Digital Modulation Connectors (Vector Models Only)
I OUT, Q OUT, OUT, OUT
NOTE OUT and OUT, require Option 1EL.
Connector Type: female BNC Impedance: 50 Ω
DC–coupled
Signal
I OUT The analog, in–phase component of I/Q modulation from the internal baseband generator.
Q OUT The analog, quadrature–phase component of I/Q modulation from the internal baseband
generator.
OUT
Used in conjunction with the I OUT connector to provide a balanced
a
baseband stimulus.
a
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).
OUT
Used in conjunction with the Q OUT connector to provide a balanced
a
baseband stimulus.
Damage Levels > 1 Vrms DC Origin Offset typically <10 mV
Output Signal Levels into a 50 Ω Load
• 0.5 V
pk
, typical, corresponds to one unit length of the I/Q vector
• 0.69 V
pk
(2.84 dB), typical, maximum crest factor for peaks for π/4 DQPSK, alpha = 0.5
• 0.71 V
pk
(3.08 dB), typical, maximum crest factor for peaks for π/4 DQPSK, alpha = 0.35
• Typically 1 V
p–p
maximum
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