User guide

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25 MHz Arbitrary / Function Generators
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odels 4075 & 4078
Channels 1 Channel 2 Channels
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Sine 1 µHz to 25 MHz
Square 1 µHz to 25 MHz
Triangle, Ramp 1 µHz to 5 MHz
Pulse 1 mHz to 10 MHz
Accuracy 0.002 % (20 ppm)
Resolution 12 digits or 1 µHz
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Built-in Waveforms Sine, Triangle, Square, Noise, Ramp Up, Ramp
Down, Sine(X)/X, Exponential Up, Exponential
Down, Gaussian
Waveform Length 2 points to 400,000 points
Vertical Resolution 14 bits (16,384 levels)
Noise Add 1% to 100% to output waveform
Sampling Rate 100 MSa/s, Point execution rate adjustable from 10 ns-50 s
Frequency Accuracy: 0.005% (50 ppm)
Resolution: 4 digits
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Amplitude Range 10 mV to 10 Vp-p into 50 Ω
Amplitude Resolution 3 digits (1000 counts)
Amplitude Accuracy (1 kHz) ± 1% ± 1 mV
Flatness (relative to 1 kHz) ± 0.2 dB to 1 MHz
± 1 dB to 25 MHz
Offset Range ± 5 V into 50 Ω, depending on the
Amplitude setting
Offset Resolution 10 mV with 3 digits resolution
Offset Accuracy ± 1% ± 10 mV into 50 Ω 
Output Impedance 50 Ω typical
Output Protection The instruments output is protected against
short circuit or nominal accidental voltages
applied to the main output connector
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Harmonic Distortion (sine) DC-20 kHz, -65 dBc
20 kHz-100 kHz, -60 dBc
100 kHz-5 MHz, -45 dBc
5 MHz-25 MHz, -30 dBc
Spurious (sine) DC-1 MHz < -60 dBc
Rise/Fall Time (square, pulse) < 12 ns (10% to 90%) at full amplitude into 50 Ω
Variable Duty Cycle 20% to 80% to 5 MHz (square)
40% to 60% to 10 MHz (square)
50% >10 MHz (square)
Variable Symmetry 10%-90% to 5 MHz (triangle)
Symmetry at 50% < 1 % + 5 ns
Linearity (triangle, ramp) <0.1% of peak output (1 µHz to 250 kHz)
Pulse Width 20 ns to <(Period-20 ns)
(period 10 µs - 0.1 µs) 10 ns resolution
Variable Edge Time 100 ns to Width/0.625 (50 % duty cycle)
(period 100 µs - 0.16 µs) 10 ns resolution
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Continuous Output continuous at programmed parameters
Triggered Output quiescent until triggered by an internal or
external trigger, at which time one waveform cycle is
generated to programmed parameters. Frequency of
Triggered waveform cycle is limited to 10 MHz in ARB mode
and 5 MHz in DDS mode.
Gate Same as triggered mode, except waveform is executed
for the duration of the gate signal. The last cycle
started is completed
Burst 2-999,999 cycles
Phase -180.0 to +180.0 degrees with 0.1 degree resolution
Trigger Source Trigger source may be internal, external or manual.
Internal trigger rate 0.01 Hz-1 MHz (1 µs – 10 s)
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Amplitude Modulation
Internal 0.1 Hz-20 kHz sine , square or triangle waveform
variable modulation from 0% to 100%
External 5 Vp-p for 100% modulation, 10 kΩ input
impedance
Frequency Modulation
Internal 0.1 Hz-20 kHz sine wave, square or triangle
External 5 Vp-p for 100% deviation, 10 kΩ input impedance
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Sweep Shape Linear and Logarithmic, up or down
Sweep Time 20 ms to 500 s
Sweep Trigger internal, external, continuous or burst
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Trigger IN TTL Compatible
Maximum rate 10 MHz
Minimum width 50 ns
Sync OUT TTL pulse at programmed frequency, 50 Ω source
impedance
Modulation IN 5 Vp-p for 100% modulation
10 kΩ input impedance
DC to >50 kHz minimum bandwidth
Marker Out Positive TTL pulse user programmable in Arbitrary
waveform, 50 Ω source impedance
Reference IN-OUT 10 MHz, TTL compatible, input or output, for
external unit synchronization 50 Ω output impedance
and 1 kΩ input
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Repetition 1 µs to 100 s
Resolution 4 digits
Accuracy +0.002%
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Store Memory 50 full panel settings at power-off
Arbitrary Memory 400,000 points in flash memory
Dimensions 8.4(213) x 3.5(88) x 12(300) inches (mm) (WxHxD)
Weight Approx. 3 kg (6.6 lbs)
Power 100 VAC-240 VAC ± 10%, 50 VA max.
Temperature Operating 0 ºC to + 50 ºC
Non-operating -20 ºC to + 70 ºC
Humidity 95 % RH , 0 ºC to 30 ºC
EMC According to EN55011 for radiated and conducted
emissions
Electrical Discharge Immunity According to EN55082
Safety Specifications According to EN61010 , CE approved
Accessories
Supplied: CD containing user manual & Wave-X software, null modem serial
interface cable, power cord
Specifications
4075 4078
Three Year Warranty
models
v022310