Rear Panel Connectors, Clock In/Out, Vca In, Sync Out | Fluke 271

Rear Panel Connectors

Getting Started

Controls and Connections

Rear Panel Connectors

CLOCK IN/OUT

This socket operates both as an input and as an output, depending on the mode in which the instrument is being used.

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As an input it can be used either to run the instrument from an external master clock or as a synchronization input when slaved to another instrument as the master.

As an output it provides the internal master clock or the master synchronization output for another instrument as the slave.

In both modes the levels are TTL and CMOS compatible.

VCA IN

This is the modulation input for voltage controlled amplitude (VCA). +2.5 V will drive the amplitude to 100 % of its programmed value. The input impedance is approximately

6 kΩ.

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Modulation is beyond the scope of this Getting Started Manual but is covered in detail in chapter 8 of the Users Manual.

SYNC OUT

This socket is used when the instrument is the master in a master-slave set-up. It provides a signal to drive the EXT TRIG front panel input of the slaved instrument.

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Master-slave operation is beyond the scope of this Getting Started Manual but is covered in chapters 12 and 13 of the Users Manual.

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Fluke 271 manual Rear Panel Connectors, Clock In/Out, Vca In, Sync Out, Getting Started

Contents

Programmable 10 MHz DDS Function Generator Getting Started Manual To register your product online, visit register.fluke.com LIMITED WARRANTY AND LIMITATION OF LIABILITY Safety Getting Started Manual Alternating current Warning - hazardous voltages may be present Safety continuedThe following symbols are used on the instrument and in this manual Terminal connected to chassis ground Mains supply OFF Mains supply ONPage Emissions EMC ComplianceImmunity e EN61000-4-5 1995 Surge 0.5 kV line to line, 1 kV line to ground Title Table of Contents AUX OUT viii Mains Supply Voltage Getting StartedIntroduction Before You Start Externally Applied Voltages shx0001f.gif Controls and ConnectionsGetting Started Figure 1. Model 271 Front Panel Controls The Liquid Crystal DisplayFunction Keys FIELD and DIGIT Keys and the Rotary Control Numeric, Units and SET Keys RECALL and REMOTE MODE KeysUTILITIES Keys OUTPUT Key AUX OUT Front Panel Inputs and OutputsEXT TRIG MAIN OUT SYNC OUT Rear Panel ConnectorsCLOCK IN/OUT VCA IN TRIG/SWEEP OUT RS232 and GPIB Interface Connectors Check the LCD Display Using the InstrumentPlug in and switch on the instrument Starting up SYM=50.0% 50.0% Generating Continuous SignalsSet a frequency, for example 12.5 kHz FREQ=12.50000kHz VhiZ=+20.0 Vpp 50Ω DC=+0.00mV +0.00mV =80.00000us Set the amplitude to +10 dBmHave a look at some other waveforms Change the dc offset DC OFFSET CHANGE * * BY OUTPUT LEVEL Effect of the output attenuatorPER =80.00000us VhiZ=+4.00 Vpp 50Ω DC=+1.50 V +151.mV SYM=50.0% 50.0% Asymmetric waveforms Adjusting the phaseSOURCE=EXT TGEN=1.00ms 1.000kHz BURST COUNT= PHASE=+000 +000 SOURCE=EXT TGEN=1.00ms 1.000kHz BURST COUNT= PHASE=+116 +116 TRIG/SWEEP OUT signal Generating Swept Signals MODE=BEG-END LAW=LOG RAMP TIME=5.00 s TRIG SRC=CONTINUOUS MORE MODE=BEG-END LAW=LOG RAMP TIME=0.05 s TRIG SRC=CONTINUOUS MOREBEG FRQ=261.6000 Hz END FRQ=1.108700kHz MARK FRQ=523.3000 Hz MORE FREQ=2.000000kHz VhiZ=+20.0 Vpp 50Ω DC=+0.00mV +0.00mV SOURCE=EXT TGEN=1.00ms 1.000kHz BURST COUNT=0001 PHASE=+000 +000PHASE=+000 +000 Generating a Triggered Burst FREQ A=800.0000 Hz FREQ B=1.200000kHz SOURCE=TGEN FREE FSK ModeSpecial Waveforms Staircases Figure 2. 625-line PAL TV Signal amplitude stepname start µs VALS=ABS AUTO=YES STEP=08 ACTIVE LENGTH=0005 LEVEL=+153 VALS=ABS AUTO=YES STEP=01 ACTIVE LENGTH=0256 LEVEL=+000 RECALL ARB No ARB 03 IS EMPTY Saving and Recalling SettingsArbitrary Waveforms RECALL ARB No SINX/X ENTER TO EXECUTE Other Functions and Waveforms