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Section 5
Operating Instructions
Before applying power to unit, make sure that input voltage setting is correct and the ventilation holes
are not blocked. Ensure that ventilation fan is working well.
It is necessary to inspect the generated signal with an oscilloscope before connecting it to any electronic
circuit. Hence use of oscilloscope is mentioned in the procedure.
Turn on the instrument with POWER SWITCH provided on the front panel. The display shows the
reading as per present settings.
5.1
FUNCTION GENERATOR OUTPUT
1. Select the type of waveform required by FUNCTION SELECTOR SWITCH.
2. Select the range of frequency by FREQUENCY RANGE SELECTOR SWITCH.
3. Connect MAIN output signal to Channel 1 of oscilloscope and SYNC output signal to
Channel 2 of oscilloscope. Set the trigger source of oscilloscope at Channel 2.
4. Set the frequency of the signal by adjustment knob. The display shows the frequency
reading of signal.
5. Adjust the amplitude of the signal by AMPLITUDE KNOB. Pull the knob if the signal is to
be attenuated 10 times.
6. Set the DC offset of signal by DC OFFSET knob to required level (-10 V to +10 V).
7. Check the impedance of the load before connecting (50 W max.).
5.2
SWEEP GENERATOR OUTPUT
1. Connect MAIN output to Channel 1 of oscilloscope and SWEEP output to Channel 2.
2. Channel 2 displays linear sawtooth waveform. SWEEP output is available regardless of
SWEEP ON switch. If SWEEP WIDTH knob is pulled, then log sweep will be available.
3. Adjust the sweep rate by SWEEP RATE knob (adjustable from 5 s to 10 ms).
4. Adjust the starting frequency as explained in 5.1.
5. Pull the SWEEP RATE knob to turn sweep mode ON.
6. Channel 1 will display sweep wave.
7. Adjust the sweep width using the SWEEP WIDTH knob (1:1 to 1:100).
5.3
FREQUENCY COUNTER (model 4003A only)
1.
Check the COUPLING switch position. The HF position is used for frequencies more than
100 kHz. LF position is used for frequencies less than 100 kHz.
2.
The EXT COUNTER LED will be ON when COUPLING switch is selected for counting
mode.
3.
Connect the signal to EXT COUNTER BNC.
