Tektronix 071-0590-00 user manual GB1400 Instrument Configurations Standard and Burst Option

Getting Started

GB1400 Instrument Configurations - Standard and Burst Option

GB1400 instruments are sold with and without the BURST option. To determine if the burst option is installed in a GB1400, press the F1 key several times until you get to the UTIL menu. Then select the OPTION menu. The OPTIONS menu will tell you if the Burst option is installed in the unit. External indications of the BURST option are unique labels for both transmitter and receiver. See a write-up on Burst Mode at the end of the Functional Overview section of Chapter 2.

GB1400 with no Burst Option Standard instrument configuration

All standard configuration GB1400 Generators (no burst option) have an AC coupled external clock input. All standard configuration GB1400 Analyzers (no burst option) have AC coupled paths in the receiver clock input circuitry.

GB1400 with Burst Option

When the BURST option is installed in the GB1400, the AC coupled paths in both transmitter and receiver are eliminated. This will also change several specifications listed in the table below. External clock inputs to the GB1400 transmitter must be ECL levels when the BURST option is installed. Clock inputs into the GB1400 receiver must be ECL levels and are terminated into 50 Ohms to -2V.

GB1400 Clock Signals for Standard and Burst and Instruments

	Standard Coupling	Burst (Option) Coupling
GB1400 TX
External Clock Input	50 Ohm, AC coupled,	50 Ohm to -2V, DC coupled,
	2V max	ECL levels
GB1400 RX
Clock Input	50 Ohm, AC coupled,	50 Ohm to -2V, DC coupled,
	2.0V max	ECL levels

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