B&K 4071 user manual Power & Voltage Measurement Mode Parameters, Power Level, Voltage Level

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5.18 Power & Voltage Measurement Mode

Introduction

The Power & Voltage Measurement mode measures the signal level on the Ext Mod In connector and displays the power and voltage level on the LCD display. The Power Measurement mode applies to frequencies in the DC to 50KHz range. An internal lowpass filter attenuates all signals outside this frequency range. The internal Digital Signal Processor (DSP) calculates a point-by-point true RMS power. For the voltage measurement, an averaging (low pass filter) algorithm is used.

To calculate power, "system impedance" must be specified. If the input signal were to be applied across a load resistor then that resistor would dissipate power. The power dissipated in the resistor is a function of the resistor's value. The value of this load resistor is referred to here as the "system impedance" which must be specified by the user. As opposed to instruments, which use a fixed value for this impedance (i.e. 50 or 600 O) the 4071 allows any value from 1 to 999 ohms to be used for power calculations.

The Ext Mod In jack is high impedance (about 30KO). If your system expects this signal to be terminated, place a resistor (of the appropriate terminating resistance) across this input.

Power & Voltage Measurement Mode Parameters

 

 

 

Measured Level on mod input:

+--.-- dBm

 

 

 

 

 

Volts: + 003 mV

Pwr res:

600 ohm

 

 

2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 5.18-1: Power & Voltage Measurement mode display

1. Power Level

1

3

In this field the true RMS power level is displayed with 0.1 dBm resolution. The calculated power level is calculated using the RMS input voltage and the specified system impedance.

2. Voltage Level

In this field the average DC voltage of the input signal is displayed. If an AC signal is applied to the input, this field will display the DC component of that signal.

3. System Impedance

In this field specify the value of the load resistance used to calculate power. You may enter a value between 1 and 999O. To enter a value, type 1 to 3 numeric digits. If you type 3 digits, the value is automatically entered. If you only type 1 or 2 digits, you can press the MHz key or the KHz key or the Hz key (all are equivalent) to enter the impedance value.

4. External Modulation In Connector

Apply the signal to be measured to this connector. For this mode, the input signal may be in the -5.0V to +5.0V range. Levels outside this range will be clipped by limiting circuitry.

*** Caution***

Levels outside ±25V may damage the 4071.

5. RS-232 Port

You can have the power level value continuously sent to the terminal port by issuing the remote control command "enable LCD echo." See chapter 6.0 for further details on this command.

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BK Precision 4071 User Manual Rev.2.2

Page 34 Page 36
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Page 34 Page 36
Contents User’s Manual Page +K Precision Corp Model User’s ManualTable of Contents DC Operation Option Warranty informationRemote operation Arbitrary waveform systemIntroduction Description Modes Feature summarySIG Out connector Installation and setupSync out connector External Modulation In connector External Trigger/Gating/FSK/BPSK input Line in connector External Reference Input / Ext Arb. Clock connectorExternal Arb Sync In / Out connector RS232 Interface connectorRecall / Store key Mode keyOperating controls and keys Field arrow keysÉ, ê, è, ç keys Trigger keyNumeric keys 0 to 9, MHz/dBm, KHz/Vp-p/Sec, Hz/mVp-p/mS keys One Touch Mode KeysClear key Changing level Operating mode selectionOperating guide Changing frequencyEntering a new value Changing valuesModifying an existing value Sinewave Mode 000,000.00 Hz 10.0 dBm Mode descriptionsBasic Sinewave CW Mode Internal AM Mode Input Gain External AM ModeExternal AM Mode Parameters External AM Input gain 000,000.00 Hz PEP level -10.0 dBmPeak Frequency Deviation Internal FM ModeInternal FM Mode Parameters Int FM 1,000 Hz Pk dev 10,000 Hz 000,000.00 Hz 10.0 dBmExternal FM Pk dev 10,000 Hz 000,000.00 Hz 10.0 dBm External FM ModeExternal FM Mode Parameters Int PM 1,000 Hz Pk dev 180 deg 000,000.00 Hz 10.0 dBm Internal PM ModeInternal PM Mode Parameters Peak Phase DeviationExternal PM Pk dev 180 deg 000,000.00 Hz 10.0 dBm External PM ModeExternal PM Mode Parameters Sweep Mode Sweep time Up / Down sweepSpace Frequency Internal FSK ModeInternal FSK Mode Parameters Mark FrequencyExt FSK Input External FSK ModeExternal FSK Mode Parameters Ext FSK Mark 1,000,000.00 Hz Space 2,000,000.00 Hz 10.0 dBmBurst frequency Burst Mode IntroductionBurst Mode Trig Ton 10,000 mS 000,000.00 Hz Off 10.0 dBm Upper/Lower Sideband selections Internal SSB ModeInternal SSB Mode Parameters Int SSB 1,000 Hz Upper Sideband 000,000.00 Hz 10.0 dBmExternal SSB Upper Sideband 000,000.00 Hz 10.0 dBm External SSB ModeExternal SSB Mode Parameters Background Dtmf Generation ModeDtmf generation # Duration 200 mS Delay Level -10.0 dBm Dtmf Generation Mode ParametersDtmf Duration Dtmf DelayDtmf detected digits Dtmf Detection ModeDtmf Detection Mode Parameters Dtmf detection on Ext Mod input 3 # aVoltage Level Power & Voltage Measurement ModePower & Voltage Measurement Mode Parameters Power LevelOther mode Arbitrary ModeRemote Mode Int Bpsk 1,000 Hz 000,000.00 Hz 10.0 dBm Internal Bpsk ModeInternal Bpsk Mode Parameters External Bpsk 000,000.00 Hz 10.0 dBm External Bpsk ModeExternal Bpsk Mode Parameters 10,000 Hz F2 Ton 000 mS Toff 10.0 Dualtone Generation ModeDualtone Examples Baud Rate Data Modulation ModeUsing the Data Modulation Mode Data Modulation Mode ParametersExample Message Downloading Modulation Message DataSaving the Message Triggering the TransmissionEnd Frequency Voltage Controlled Oscillator VCO ModeVCO Mode Parameters Start End 1,000,000.00 Hz 10.0 dBmChecking your connection with Hyper Terminal ConnectingRemote Operation Remote Control Programming Rules Remote Control OperationReturns C Remote Control CommandsReset 4071 to Sine wave mode × ØReport hardware and software versions K1.0 Enable, Disable front panel keys and rotary knobE1,0 Enable, Disable LCD echo to terminal ? or H Print help menu Stp 31,500,000.00 HzLinear Trig Up Time 10,000 mS F0-9 Move cursor to field 0 toExample Remote Control ExamplesPin 9-pin cable Pin 25 pin cable adapter Arbitrary Waveform ModeQuick Start Guide Description of the Arbitrary Waveform Generator Introduction to the Arbitrary Waveform SystemPulse Generator Switching ModesFeature Summary Function GeneratorContinuous/Triggered mode Arbitrary Waveform ModeInt Clock / Ext Clock / Lock Master Lock slave mode PhaseRepetition Frequency Function Generator ModeFunction Gen Wave Pos Ramp Rep Freq 100,000 Hz 000 mV WaveformDuty Cycle Pulse Generator ModePositive Only Cwaveload /COMx /y /baudz filename.ext Using WAVELOAD.EXEDownloading arbitrary waveforms Saving Arbitrary WaveformsUsing your own program Rules for Floating Point format Data FormatsFloating Point Format Example #2 Time & Value Floating Point FormatDigital Format Rules for Integer format Integer FormatExample The data value E468 is handled as follows Hexadecimal FormatRules for Hexadecimal format Example Binary FormatRules for Binary format Generator Multiple Units LockingArb Waveform Size Restrictions More on Phase OffsetsPhase Resolution Starting Address = Number of waveform points * Phase OffsetProgram Listing ARB.BAS Example Arb ProgramClose System Subroutines Return Print #1, a Send integer value to Return Return DC Operation Option Wiring DiagramOperating Modes 4071 SpecificationsRemote Software CDAppendix a Hardware SetupCLS CLS Print Print Subroutines END SUB Appendix B Television Remote Control ExampleCLS Make sure a 4071 is attached to the serial port Print Limited Two-Year Warranty Service Information Savi Ranch Pkwy Yorba Linda, CA 92887 USA TEL
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