Agilent Technologies E4438C Q out Q are used in conjunction with I and Q to, LF output, Input

General Characteristics

_	_	_	_
I and Q out		I and Q are used in conjunction with I and Q to
		provide a balanced baseband stimulus. Balanced signals
		are signals present in two separate conductors that are
		symmetrical about the common mode offset, and are
		opposite in polarity [180 degrees out of phase].
		These female BNC connectors are provided only on
		signal generators with Option 601 or 602. If you configure
		your signal generator with Option 1EM, these inputs are
		relocated to rear panel SMB connectors.
LF output		Outputs the internally-generated LF source. Outputs 0 to
		2.5 Vpeak into 50 ohms, or 0 to 5 Vpeak into high
		impedance. [BNC, front panel]
Pattern trigger input		Accepts CMOS1 signal to trigger internal pattern or frame
		generator to start single pattern output. Minimum pulse
		width 100 ns. The damage levels are –0.5 to +5.5 V.
		[BNC, rear panel]
Q input		Accepts a Q input for I/Q modulation. Nominal input
		impedance 50 or 600 ohms, damage levels are 1 Vrms
		and 10 Vpeak. [BNC, front panel]
RF output		Nominal output impedance 50 ohms.
		[type-N female, front panel]
Sweep output		Generates output voltage, 0 to +10 V when signal
		generator is sweeping. Output impedance < 1 ohm, can
		drive 2000 ohms. [BNC, rear panel]
Symbol sync input		The CMOS1 compatible symbol sync connector accepts
		an externally supplied symbol sync for digital modulation
		applications. The expected input is a symbol clock signal.
		It may be used in two modes. When used as a symbol
		sync in conjunction with a data clock, the signal must be
		high during the first data bit of the symbol. The signal
		must be valid during the falling edge of the data clock
		signal and may be a single pulse or continuous. When
		the symbol sync itself is used as the [symbol] clock, the
		falling edge is used to clock the data signal.
		The maximum clock rate is 50 MHz. The damage levels
		are –0.5 to +5.5 V. [BNC, front panel]
		This female BNC connector is provided on signal
		generators with Option 601 or 602. On signal generators
		with Option 1EM, this input is relocated to a rear panel
		SMB connector.
Symbol sync output		Outputs CMOS1 symbol clock for symbol synchronization,
		one data clock period wide. [Auxiliary I/O connector,
		rear panel]
Trigger input		Accepts CMOS 1 signal for triggering point-to-point in
		manual sweep mode, or to trigger start of LF sweep.
		the damage levels are –0.5 to +5.5 V. [BNC, rear panel]
Trigger output		Outputs a TTL signal: high at start of dwell, or when
		waiting for point trigger in manual sweep mode; low
		when dwell is over or point trigger is received, high or
		low 2 µs pulse at start of LF sweep. [BNC, rear panel]

1. Rear panel inputs and outputs are 3.3 V CMOS, unless indicated otherwise. CMOS inputs will accept 5 V CMOS, 3 V CMOS, or TTL voltage levels.

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