Agilent Technologies E4400-90326 TTL/CMOS high to TTL/CMOS low edge trigger. With Option UN8

ESG Family Signal Generators		Exploring the User Interface
		Rear Panel
12. PATTERN	This input can accept either a TTL/CMOS low to TTL/CMOS high or
TRIG IN	TTL/CMOS high to TTL/CMOS low edge trigger. With Option UN8
	this input triggers the internal digital modulation pattern generator
	to start a single pattern output or to stop and re-synchronize a

pattern that is being continuously output. With Option UND this input is the external trigger source for all ARB waveform generator triggers. With Option 201 this connector is used for system reset trigger input.

13.BURST GATE The BURST GATE IN connector accepts a TTL or CMOS signal for

IN	gating burst power in digital modulation applications. This female
	BNC connector is present only on instruments with Options UND or
	UN8. With Option 201 this connector is used for even second
	synchronization input.

14.COHERENT This connector outputs RF that is not modulated with AM, pulse, or CARRIER OUT I/Q modulation, but that is modulated with FM or ΦM. This SMA

connector is present only on ESG-D and ESG-DP Series Signal Generators.

15.ALT PWR IN This BNC connector accepts a CMOS signal for synchronization of external data and alternate power signal timing. This connector is active only with Options UNA or 201. With Option 201 this connector is used for Long Code State Latch strobe input.

16.	EVENT 1	With Option UN8 turned on, this TTL/CMOS-compatible connector
		outputs a pulse that can be used to trigger the start of a data
		pattern, frame, or timeslot. With Option UN5 turned on, an even
		second output is generated every two seconds indicating the
		beginning of each short code sequence. With Option UND turned on,
		a marker is output whenever a Marker 1 is turned on in the
		waveform. With Option 201 you can select from several different
		output signals for this connector.
17.	EVENT 2	This TTL/CMOS-compatible connector outputs a data enable signal
		for gating external equipment. With Option UN5 turned on, a
		marker is output every 26.67 ms, corresponding to the start of each
		short code. With Option UND turned on, a marker is output
		whenever a Marker 2 is turned on in the waveform. With
		Option 201 this connector is used for system reset output.

Quick Start Guide 2-13