Assessments - 4, GPA: 3.5
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Facilidade de uso
or 600 . output from the main generator. It will provide up to 20 V p-p into a high- impedance load or 10 V p-p into a matched 50 . or 600 . load. It can tolerate a short circuit for 60 seconds. shx0005f.gif AUX OUT The AUX OUT socket provides a two-level TTL and CMOS compatible signal, synchronous with the signal from the MAIN OUT socket. shx0006f.gif The symmetry of the AUX OUT signal is the same as that set for the main output but you can adjust the phase relationship between MAIN OUT and AUX OUT using the PHASE setting in the TRIG menu. AUX OUT logic levels are nominally 0 V and 5 V from typically 50 .. AUX OUT will withstand a short-circuit. EXT TRIG EXT TRIG is the external trigger input for the non- continuous modes (trigger, gate, sweep, FSK and hop) and for synchronizing the generator as a slave to an external master generator. shx0012f.gif 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. shx0013f.gif 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 k.. shx0013f.gif 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. shx0014f.gif Master-slave operation is beyond the scope of this Getting Started Manual but is covered in chapters 12 and 13 of the Users Manual. TRIG/SWEEP OUT The TRIG/SWEEP output socket provides both trigger and marker signals, depending on the instrument's mode of operation. shx0016f.gif Its primary use is for triggering an oscilloscope or other recording device, but it can also provide z-axis bright-up markers during sweep and frequency-hopping modes. RS232 and GPIB Interface Connectors These sockets are for controlling the instrument remotely, using a PC or other controller device. Remote control is beyond the scope of this Getting Started Manual, but is covered in detail in chapter 16 of the Users Manual. shx0017f.gif Using the Instrument While familiarizing yourself with the instrument you will find it useful to observe the outputs on an oscilloscope. For most purposes it is sufficient to connect the MAIN OUT front panel socket to the oscilloscope's Y input, and the AUX OUT front panel socket to the oscilloscope's trigger input. If no oscilloscope is available you can still learn a great deal about the instrument settings, since the effect of front-panel operations is visible in the LCD display in the form of text messages, parameter information, menus and status information. Starting up The ac supply on/off switch is located at the bottom left side of the front panel. Caution Before connecting to the ac supply, check that the supply voltage setting is correct for the region. Please refer to the Users Manual if it needs to be changed. Plug in and switch on the instrument On power-up the LCD panel illuminates and the instrument performs a series of self tests. In the event that an error message is displayed please refer to the Users Manual. Check the LCD Display It should look similar to the main menu shown in figure 1. If not, press RECALL, 0, ENTER to bring up the factory default main menu. Generating Continuous Signals Select SINE on the function keys, if it is not already selected. If there is no signal at the oscilloscope input it will almost certainly be because the generator's output is switched off. If the lamp next to the MAIN OUT socket is not lit, press the OUTPUT key. The AUX OUT socket is always on. Press the right FIELD key to put the cursor in the numeric part of the top line and move the cursor a couple of digits to the right with the right DIGIT key. You can experiment with the rotary control to adjust the frequency setting. You can also experiment with entering frequencies using the numeric keypad, and with using the DIGIT key to adjust the frequency in decades; to do this, put the cursor under the rightmost (units) field. Set a frequency, for example 12.5 kHz You can do this by either of the methods above. The easiest is probably to key FREQ/PER, 1, 2, ., 5, kHz, ENTER. The display should look like this: FREQ=12.50000kHz VhiZ=+20.0 Vpp 50. DC=+0.00mV (+0.00mV) SYM=50.0% (50.0%) You can also view and edit in terms of period. Move the cursor into the first field and press one of the DIGIT keys. The display should change to: PER =80.00000us VhiZ=+20.0 Vpp...
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