Metrix GX 305 User Manual
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Metrix GX 305 User Manual

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Pôle Test et Mesure de CHAUVIN-ARNOUX
Parc des Glaisins - 6, avenue du Pré de Challes
Tel. +33 (0)4.50.64.22.22 - Fax +33 (0)4.50.64.22.00
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  • Page 1 Function Generators G G G G X X X X 3 3 3 3 0 0 0 0 5 5 5 5 G G G G X X X X 3 3 3 3 0 0 0 0 5 5 5 5 G G G G X X X X 3 3 3 3...

  • Page 2: Table Of Contents

    Precautions ................................ 4 Safety measures ..............................4 Guarantee ................................5 Maintenance, metrological checks ........................5 Maintenance............................... 5 r II GX 305 and GX 310 Description........................... 6 Presentation ............................... 6 Specifications ..............................6 Front Face ................................6 Back Face ................................7 Display................................7 Keys..................................
  • Page 3 Contents SHIFT Shift Keying function (GX 320 only)....................... 37 Connections ..............................37 Selection of FSK mode............................. 37 Selection of PSK mode ............................ 37 Selection of piloting source ..........................37 Adjusting jump frequencies (in FSK mode)...................... 38 Adjusting jump phases (in PSK mode)......................38 Other settings ..............................

  • Page 4: General Instructions

    General Instructions General Instructions Introduction You have just purchased a GX 305, GX 310 or GX 320 Function Generator and we appreciate your confidence. • the generator Content of the box • the safety notice • the power supply cable •...

  • Page 5: Guarantee

    General Instructions General Instructions (contd.) Symbols on the Warning: potential hazard, refer to the operating guide. instrument Selective waste sorting for recycling electric and electronic waste. In compliance with the WEEE 2002/96/EC directive: the device should not be considered as household waste. Earth terminal Alternating signal Indication of a key double function when pressed for more than 1...

  • Page 6: Gx 305 And Gx 310 Description

    GX 305 and GX 310 Description GX 305 and GX 310 Description The GX 305 and GX 310 are alternating standard form wave generators, using the Presentation DDS (Direct Digital Synthesis) technology. They may simulate the operation and specifications of various electronic systems.

  • Page 7: Back Face

    GX 305 and GX 310 Description GX 310 Description (contd.) Working voltage indicator Back face GX 305 Network connection Working voltage indicator GX 310 GX 310P Network connection USB type B connection Display Function Generators II - 7...
  • Page 8 GX 305 and GX 310 Description GX 305 and GX 310 Description (contd.) Wave selection: • Sinusoidal • square • logic • triangle • continuous Indication of the displayed frequency: • Freq, Freq or Freq START • Time (sweep interval)

  • Page 9: Keys

    GX 305 and GX 310 Description GX 305 and GX 310 Description (contd.) Keys The keys with the symbol have a specific action when pressed for more than 1 second. • The white keys may have a backlight: Appliance under power but not turned on...
  • Page 10 GX 305 and 310 Description GX 305 and GX 310 Description (contd.) Keys pressed for less than 1 second (contd.) LOGIC LEVEL LOGIC waveform selected: Adjustment of the high or low signal level using the wheel FUNCTION FUNCTION keys: Selection of one of the three available functions SWEEP selection of the INTernal or EXTernal command signal •...

  • Page 11: Pressing Keys For More Than > 1S

    GX 305 and GX 310 Description GX 305 and GX 310 Description (contd.) Keys pressed for more than 1 second Pressing the key for more than 1 second forces the duty cycle to 50%. Pressing the key for more than 1 second switches from a peak to peak amplitude display to an RMS (root mean square) display.

  • Page 12: Gx 320 Description

    GX 320 Description GX 320 Description Presentation The GX 320 is a standard alternating signal generator, using the DDS (Direct Digital Synthesis) technology. It may simulate the operation and the specifications of various electronic systems. It also includes a frequency meter input. The GX 320E is remote programmable via an USB or ETHERNET link.

  • Page 13: Back Face

    GX 320 Description GX 320 Description (contd.) Indication of the working voltage Rear panel GX 320 USB type B connection Network Connection Indication of the GX 320E working voltage Network Connection USB type B ETHERNET connection Display Function Generators III - 13...
  • Page 14 GX 320 Description GX 320 Description (contd.) Signal selection: • sinusoidal • square • logic • triangle • continuous current waveform indicator Display of the current frequency phase: • Freq, Freq and Freq START • Phase, Phase , Phase START •...
  • Page 15 GX 320 Description GX 320 Description (contd.) HIGH / LOW level logical type display INTernal / EXTernal source selection Mode display: • AM / FM Modulation • LINear / LOGarithmic sweep • Master / Slave synchronisation • Shift key Frequency / Phase Indication that the MODE key is assigned: •...

  • Page 16: Keys

    GX 320 Description GX 320 Description (contd.) Keys Keys with the symbol have a specific action when pressed for more than 1 second. • The white keys may have a back light: Appliance under power but not turned on (red) Appliance turned on (green) MAIN OUT Key lit...

  • Page 17: Pressing Keys For Less Than < 1S

    GX 320 Description GX 320 Description (contd.) Keys pressed for less than 1s (contd.) Validation or not of the wave on the MAIN OUT BNC. Adjustment of the wave duty cycle (square, triangle) using the wheel. Adjustment of the output wave amplitude using the wheel. •...

  • Page 18: Pressing Keys For More Than > 1S

    GX 320 Description GX 320 Description (contd.) Keys pressed for more than 1 second Pressing for more than 1 second sets the GATE function. Pressing for more than 1 second forces the duty cycle to 50 %. Pressing the key for more than 1 second switches from a peak to peak amplitude display to an RMS (root mean square) display.

  • Page 19: General Commands

    General Commands General Commands Commissioning Check that your instrument is compatible with the mains network voltage (see the label at the back of the instrument), that the power supply cable is not damaged and that it is earthed. The power supply cable plug is used as a cut off point, connect the device to a mains outlet that is easily accessible and is earthed in order to ensure safety.

  • Page 20: Stop

    General Commands General Commands (contd.) Stop Whatever the mode, pressing this key puts the instrument on STANDBY. When pressed while in Normal mode the context is saved: - current settings in use for signal generation when the instrument was stopped, - settings for other functions that may have been changed.

  • Page 21: Adjusting Screen Contrast

    General Commands General Command (contd.) Setting the screen contrast LOGIC LEVEL 1s or The display shows: The key becomes: Adjustment of the contrast value from 0 to 99 using the coding wheel. Exiting from this mode is made by pressing another key. The frequency display returns to the screen and the possible associated keys blink.

  • Page 22: Display Of The Software Version

    General Commands General Commands (contd.) Software version display The following screen is displayed: for version number: 1.00 for GX 305 for GX 310 for the version date: i.e. the 23rd November for GX 320 2008 for Programmable Exit Version mode.
  • Page 23 CAL.07 : sets AM modulation for square and LOGIC signals Running adjustments Pressing the key triggers automatic calibration or the selected calibration step. The display shows: (GX 305/310) (GX 320) for automatic (then the adjustments are displayed in order) or in manual mode.
  • Page 24 Saving settings Pressing saves the calibration. (GX 320) display is cleared once the backup is made. It reappears if the calibration is changed. (GX 305/310) Exit from Calibration mode Exit this mode using this key. The key becomes: To save settings a data backup should be made (see above) before exiting the mode, otherwise the settings are lost and the previous settings are re-loaded at start-up.

  • Page 25: Instrument Autotest

    Wiring needed These tests require specific wiring of the device’s input/output terminals. Two wirings are needed. When needed they are indicated by the following messages: for wiring n° 1: (GX 305/310) (GX 320) for wiring n° 2: (GX 305/310) (GX 320) (GX 305/310) Once the wiring has been made pressing the key continues the test.
  • Page 26 AUTOTEST mode By default this mode is entered using the automatic mode tSt.AU. The display is MAIN OUT the following: (GX 305/310) MAIN OUT Switching to manual mode is done by turning the test step selection wheel and running individually.
  • Page 27 General Commands General Commands (contd.) Running the tests Pressing the key triggers the automatic test or the selected test step. The display shows: (GX 310) (GX 320) in automatic mode (then scrolls through the tests) or in manual mode. At the end of the run 2 situations are possible: the test was successful or the test failed.

  • Page 28: Saving A Configuration (Gx 320)

    General commands General Commands (contd.) Saving a configuration (GX 320) The GX 320 can save and reload user configurations. A total of up to 15 files can be saved. This backup is permanent (the data is saved even if the instrument is powered down).

  • Page 29: Reloading A Configuration (Gx 320)

    General Commands General Commands (contd.) Reloading a configuration (GX 320) The GX 320 can reload 16 saved configurations: • 15 user configurations, • plus the default configuration (“factory” configuration see §. Stop). Entering configuration reload mode. is displayed on the screen with the current file number: if file 3 is empty.

  • Page 30: Clearing A Configuration (Gx 320)

    General commands General Commands (contd.) Clearing a configuration (GX 320) Clearing a user configuration file (Set.01 to Set.15) consists in saving a null configuration in the file. This configuration is shown by displaying the file number only during file selection. Reloading a null configuration has no effect (the existing settings are kept active).

  • Page 31: Generation Of Simple Continuous Periodical Signals

    • TTL logic • triangular • continuous. Waveform selection GX 305/310 Sine waveform Square waveform Logic output waveform Triangular waveform Continuous waveform Each time a key is pressed the symbol is displayed on the screen and the keys that can be assigned to the wheel blink.

  • Page 32: Adjusting Signal Frequency

    Generation of basic periodic signals Generation of basic “CONT” periodic signals (contd.) Adjusting signal frequency Frequency is set in two steps: • Entry of the five significant digits • Setting the decimal point and the unit multiplier Entering the 5 significant digits The coding wheel and the following key can be used to enter the 5 significant digits.
  • Page 33 Generation of basic periodic signals Generation of basic CONT periodic signals (contd.) Example 1: The wheel is not assigned to a setting (FREQ not lit or blinking), the current frequency value is: We want to enter: 1st possibility The FREQ key lights: The display shows: The display shows : The display shows :...
  • Page 34 Generation of basic periodic signals Generation of basic “CONT” periodic signals (contd.) The display shows: The display shows: The display shows: The display shows: 3rd possibility The FREQ key lights . The display shows: 2500 The display shows: The display shows: Example 2: The wheel is not assigned to any settings (FREQ key unlit), the current frequency value is: We want to enter:...

  • Page 35: Adjusting Signal Duty Cycle

    Generation of basic periodic signals Generation of basic “CONT” periodic signals (contd.) Setting the duty cycle The duty cycle can only be adjusted for square, logic or triangle forms using the “CONTinuous” function. The setting can be limited depending on the signal frequency. Signal Frequency Possible adjustments...

  • Page 36: Adjusting Offset And Dc Level

    Generation of basic periodic signals Generation of basic “CONT” periodic signals (contd.) Setting the offset and DC level Assignment of offset adjustment to the wheel. The key lights. Value adjustment. The variation field is from -10 V to +10 V maximum in an open circuit. Forces the offset value to 0.

  • Page 37: Shift Shift Keying Function (Gx 320 Only)

    Fonction SHIFT K Shift Keying function “SHIFT K” (GX 320 only) The SHIFT KEY function can work with the signal frequency (FSK) or phase (PSK): - “FSK” is a frequency commutation piloted either INTernally or EXTernally: switching from Freq to Freq and vice versa.

  • Page 38: Adjusting Jump Frequencies (In Fsk Mode)

    SHIFT K Function Shift Keying “SHIFT K” function (contd.) Setting frequencies in FSK mode Freq display and assignment of adjustment to the wheel. START The key lights: Freq display and assignment of adjustment to the wheel. The key lights: Pressed successively selects the digit from which the increment will be applied.

  • Page 39: Sweep Frequency Scan Function

    The user can choose a scan time from 10 ms to 100 s. • either EXTernally using a voltage of ± 10 V applied to VCF IN (GX 305/310) or VCG IN (GX 320) with a frequency < 15 kHz.

  • Page 40: Selection Of The Scan Source

    The generated output frequency is proportional (according to a linear or logarithmic rule) to the voltage on VCF IN (GX 305/310) or VCG IN (GX 320). The command signal is sampled on 8 bits using a frequency of 60 kHz.

  • Page 41: Adjusting Scan Period Using An Internal Source

    SWEEP Function SWEEP frequency scan function (contd.) Setting the scan time using INTernal source Displays the Time and assigns adjustment to the wheel. The key lights: Pressed successively selects the digit to which the increment will apply. Adjusts the value using the wheel. Other settings See the CONT function.

  • Page 42: Modul Modulation Function (Gx 320 Only)

    MODUL Function MODUL Modulation function (GX 320 only) The MODUL function modulates a carrier frequency (FM) or amplitude (AM). The modulating signal can be: • either internal (INTernal source, sinusoidal 1 kHz signal) • or on VCG IN, for an EXTernal source. The carrier specifications are defined in the same way as the CONT function.

  • Page 43: Selection Of The Modulation Source

    MODUL Function MODUL Modulation function (GX 320 only, contd.) Selection of the AM/FM modulation mode Pressing successively selects the following modulation modes : INTernal source Display Description 20% amplitude modulation 80% amplitude modulation Frequency modulation EXTernal source Display Description Amplitude modulation Frequency modulation...

  • Page 44: Freq Frequency Meter Function

    Fonction FREQ Frequency meter function “FREQ” Selecting the FREQ function activates measurement of the frequency of the signal input to the FREQ EXT terminal. The frequency meter can measure frequencies from 5 Hz to 100 MHz with the following precision: <...

  • Page 45: Sync Synchronisation Function (Gx 320 Only)

    SYNC Function SYNC Synchronisation Function (GX 320 only) The SYNC function is used to synchronise several GX 320 set up in a cascade in order to create a variable phase multiple signal generator. The frequency resolution of this function is: 37 mHz, the clock frequency of the DDS is set at 10 MHz.

  • Page 46: Selection Of Slave / Master Mode

    SYNC Function SYNC Synchronisation Function (GX 320 only, contd.) Selection of the Slave / Master mode Pressed successively selects S mode (Slave): or M (Master): Adjusting phase offset Phase offset can be set on the master and on the slave (if it is not locked). Whatever the mode selected (M/S) the phase offset is that of the slave(s) related to the master.

  • Page 47: Activating Signal Generation (Master)

    SYNC Function SYNC Synchronisation Function (GX 320 only, contd.) Activation of signal On the master all adjustments are possible in real time because each generation (Master) change in the master commands resynchronisation of all the slaves. As this is not possible on the slaves, changing waveform, frequency or phase are not possible when signal generation is activated.
  • Page 48 SYNC Function SYNC Synchronisation function (GX 320 only, contd.) Example 1: Generating three phase signals Connect the three GX 320 generators as shown above (see Connections), identify a master and 2 slaves and then programme the 3 devices with: • the same frequency 1 kHz, •...
  • Page 49 SYNC Function SYNC Synchronisation Function (GX 320 only, contd.) Thus when you programme a frequency of 100 Hz, the programmed value is: ENT((100*2 )/10 + 0.5) = 2684 which is the equivalent of a frequency of 99.987 Hz (obtained by reverse calculation). If you wish to programme a synchronous n*100 Hz multiple frequency you must enter a frequency which results in a DDS programmed value of n*2684, or a true frequency equal to n*99.987 Hz.

  • Page 50: Gate Function (Gx 320 Only)

    GATE Function GATE function (GX 320 only) This function is only available with “CONT”, “SWEEP” and “MODUL”. It superimposes a stop command for the alternating MAIN OUT signal component over the current function, piloted by a TTL input to the BNC FREQ EXT Gate in terminal.

  • Page 51: Burst Pulse Burst Function (Gx 320 Only)

    BURST Function BURST Pulse burst function (GX 320 only) The BURST function generates sets of pulses: • Using an INTernal source the user must enter a generation period and the number of pulses to generate. The number of pulses Num is automatically limited so that the number cannot be greater than the number of pulses a period can contain.

  • Page 52: Setting The Number Of Pulses

    BURST Function BURST Pulse burst function (contd.) Setting the number of The pulse number value (Num) can be limited in INTernal source by the value of the entered period (Time). pulses Num In both cases (INTernal or EXTernal), the Num value is set in order to avoid having a window of less than 2 µs (see above).

  • Page 53: Remote Programming (Programmable Device Only)

    Remote programming Remote programming (programmable version only) (contd.) The programming instructions respect the IEEE 488-2 standard and the SCPI ( Standard Commands for Programmable Instruments ) protocol. The user has the possibility of having complete remote control of the device. For more information please consult the programming guide.
  • Page 54 Remote Programming Remote programming (programmable version only) (contd.) via ETHERNET Warning ! The USB cable must be disconnected. Crossed cable - Connect the crossed ETHERNET interface cable directly to the PC. - Set the connection with a terminal (Port TELNET : 23) to the IP address which has been defined in the generator.
  • Page 55 All the devices GX 310 or GX 320 – whether programmable or not – respond to the IEEE488.2 *idn? command which returns the device identification and version. Reminder : The GX 305 is not programmable. Reply format: METRIX <instrument><programmable>,<firmware version>,<version date>,<serial number><NL>...

  • Page 56: Technical Specifications

    • Signal frequency GX 305 : from 0.001 Hz to 5 MHz in 10 ranges (decades) GX 310 : from 0.001 Hz to 10 MHz in 10 ranges (decades) GX 320 : from 0.001 Hz to 20 MHz in 11 ranges (decades) •...
  • Page 57 Linear Mode (LIN) or logarithmic mode (LOG) • EXT external scan Scan using a signal with a frequency of < 15 kHz and an amplitude between ± 10 V on the BNC - ‘VCF IN’ (GX 305/310) (-10 V Freq and +10 V Freq START - ‘VCG IN’...
  • Page 58 Technical Specifications Technical Specifications (contd.) MODUL modulation (GX 320 only) function • FM Modulation Frequency resolution: 0.28 Hz, 10 mHz or 1 mHz depending on the selected range (depending on Freq , Freq START • Digital modulation: the modulating signal is read at a frequency of 65 kHz. This amplitude (256 values) is then converted to a frequency.
  • Page 59 Technical Specifications Technical Specifications (contd.) SYNC (GX 320 only) synchronisation function • Max. generated signal frequency: 100 kHz Phase adjustment ± 180 ° by steps of 1° • • Synchronisation precision dependent on generated signal frequency, ∆φ = ± F x 3.6 x 10 (for a cable length of <...

  • Page 60: General, Mechanical Specifications

    General Specifications General Specifications Environment • Reference temperature 23° C ± 5° C 45 to 65 % RH • Nominal usage range 5° C to 35° C 45 to 65 % RH • Operating temperature 0° C to 40° C 20 to 80 % RH •...
  • Page 61 Mechanical Specifications Mechanical Specifications Mechanical specifications Size (support folded): • length 190 mm • width 227 mm • height 130 mm Weight 2.850 kg Packaging 330 x 260 x 200 mm Function Generators XV -...

  • Page 62: Supplies

    Supply Supply Accessories • Delivered with the Safety instructions instrument • Power supply cable • USB A/B cable for programmable versions • Straight ETHERNET cable for GX 320E • CD-ROM containing: Operating instructions in 5 languages Programming instructions in 2 languages USB ‘CP210x USB to UART Bridge Controller’...

This manual is also suitable for:

Gx 310Gx 310pGx 320Gx 320e

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