Tektronix CFG280 11 MHz Function generator
La varietà di segnali sweep e modulati disponibili dal generatore di funzioni lo rendono particolarmente utile per applicazioni come
- testing servo-system
- amplifier response
- amplifier distortion
- amplifier stability
Può essere utilizzato per generare segnali FM, la moltiplicatore di frequenza o come oscillatore variabile beat-frequency. Può essere utilizzato per generare burst di tono. L'onda quadra di sincronizzazione e le uscite sweep possono essere utilizzate come fonte per la logica TTL o per sincronizzare un dispositivo esterno, come un oscilloscopio. Il CFG280 Generatore di funzioni è anche utile come fonte di ampiezza di segnali modulati per vari scopi.
1 - Counter Readout. This is a five-digit display that shows frequency counter measurements. The decimal point is automatically placed in the appropriate position, depending on the measurement and resolution
2 - Multiplier Buttons. Set the frequency range. The left button raises the range by a power of ten and the right button lowers the range by a power of ten. For example, if the FREQUENCY dial is set to 4.7 and the output is set to kHz, when you press the left multiplier button the output frequency will jump from 4.7 x 103 Hz (4.7 kHz) to 4.7 x 104 Hz (47 kHz)
3 - Function Buttons. Select the type of waveform generated: sine, triangle, or square
4 - Symmetry Buttons. Select either positive pulse/ramp or negative pulse/ramp (see Table 1 on page 6). When you push either button in, the output frequency is 1/10 of the value shown on the Frequency dial. When you push both buttons in, the output frequency is 1/19 of the value shown on the Frequency dial
5 - Sweep Button. Activates the internal sweep generator, which produces a signal that traverses a range of frequencies. This button enables the Sweep Rate and Sweep Widht knobs. You can also feed an external sweep signal into the CFG280 Function Generator through a connector on the rear panel.
6 - Gate Sel Button. Selects the gate time. If the gate time is too slow for the incoming signal, the Overrange Led lights
7 - Attn Button. Selects between two levels of input signals for the Ext Counter Input When you push the button in, the CFG280 attenuates the incoming signal by a factor of ten (the peak-to-peak input level must be between 3 V and 42V). When you push the button out, the function generator does not attenuate the input signal (the peak-to-peak input level must be between 50 mV and 5 V)
8 - Source Button. Selects between internal and external counter input. When you push the button in, the counter readout displays the signal frequency count from the Ext Counter Input. When you push the button out the counter readout displays the frequency count of the signal being generated by the CFG280
9 - Main Button. Selects between two voltage ranges: 0 Vp-p to 2 Vp-p or 0 Vp-p to 20 Vp-p. This control is used with the Amplitude control to set the voltage level of the Main Out signal
10 - Amplitude Knob. Adjusts the voltage within the presently selected range. This control is used with the Main control to set the voltage level of the Main Out signal
11 - DC Offset Knob. Sets the DC level (and therefore the polarity) of the Main Out signal. This knob has no effect until you pull it out
12 - Sweep Width Knob. Adjusts the range of frequencies that are traversed by each sweep
13 - Frequency Dial. Determines the frequency of the function generator output, within the range set by the Multiplier buttons
14 - Frequency Fine Adj knob. Allows small adjustments in output frequency
15 - Ext. Counter Input BNC. This connector can accept external signals with frequencies between 1 Hz and 100 MHz
16 - Sync Out BNC. This connector sends TTL trigger signals Amplitude and DC offset adjustments do not affect TTL trigger output
17 - Main Out BNC. This connector sends sine, triangle, square, and positive and negative pulse/ramp signals
18 - Sweep Out BNC. This connector sends sweep signals that you can adjust with the sweep controls. You can use a sweep signal to synchronize an external device such as an oscilloscope
19 - Sweep Width knob. Adjusts the range of frequencies that are traversed by each sweep
Pannello posteriore
1 - VFC Input BNC. This connector accepts external sweep signals
2 - GATE Input BNC. This connector accepts external gate signals, which you can use in tone-burst generation
3 - EXT AM Input BNC. This connector accepts external amplitude modulation signals
Tektronix CFG280 Documentazione
Tektronix CFG280 11 MHz Function generator 
