HP Car 3490A manual TriggerConnections,GPIB0ption030, Sample/HoldConnections,0ption040/045

SectionII

E

Model3490A

T R I G G E RC O N N E C T OJRl 1

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9				V
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F		L
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MatingConnector:

*rp- PartNo. 1251.0142

AmphenolNo.57-30141

Sample/Hold TTL Trigger:

LOW input level ((+ 0 . 4 V) for at least30 nstriggers Sample/Hold circuits and/or triggers 34904 to take a reading.

Sample/Hold AC Trigger:

Negativegoing edge of an input pulse at least 30 ns wide and having an amplitude of at least 2 V triggers Sample/Hold circuits and/or triggers 3490A to take a reading .

L E T F :

L External Trigger Flag goes LOW when the 3490A is ready for an external trigger, and goes HIGH when trigger is received (34904 is not looking for a triggerl.

*Outguard ground is isolated from inguard circuit common (input Low Terminal) and chassis(power line) ground and may be floated a maximum of 40 V above chassis.

Figure2-10. TriggerConnections,GPIB Option 030.

2-40.TriggerConnections,GPIB0ption030.

241.Figure 2-10 shows the rear panel Trigger con-

nector, Jll, and lists the External Trigger signals.The mating connector for Jll is -hp-Part No. 12514142 (Amphenol 57-30l4l).

2-42.Sample/HoldConnections,0ption040/045.

243.Option 045. Figure 2-ll shows the external trigger connections for Option 045, which is Sample/

Hold without Option 020 or Option 030. The mating connector for Trigger Connector Jll is {rp- Part No. 125141 42 (Amphenol57-3014 I ).

2-44. Sample/Hold with BCD Remote Expand Option

020.When Sample/Hold is included in an instrument with the BCD Remote ExpandOption 020, the Sample/ Hold trigger connections are located on the Remote Input Connector, J7. Figure 2-6 shows this connector and describesthe trigger signals.The mating connector

TRIGGERCONNECTbRJl1

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Sample/Hold TTL Trigger:

Mating Connector:LOW input level {(+ O.4 V) for .)t least 30 ns triggers +rp_part No. 1251*,142 Sample/Hold circuits and/or triggers 34904 to take a reading.

Must be HIGH at least60o ps prior to going Low'

Amphenol No . 57 - 30141

Sample/Hold AC Trigger:

Negative-goingedge of an input pulse at least 3() ns wide and having an amplitude of at least 2 V triggers Sample/Hold circuits and/or triggers 3490A to take a reading. Must be stable at least 2 ps prior to negtive transition.

Stretched Pulse Output:

Changesfrom HIGH l2+z . q V) to LoW ({+ o . + V) for a minimum ot 24O tts for each Sample/Hold TTL Triggpr or Sample/Hold AC Trigger input.

The mating connector for Jl 1 is *tp- Part No. 1251{142 (Amphenol 57-30141) supplied with Option 045 or Option

030.

*Outguardground is isolatedfrom inguardcircuit common (input Low Terminalland chassis(power linel ground and may be floated a maximum of 40 V above chassis.

Figure2-11. TriggerConnectionsS/H Option 045.