Specifications

Model 4085

Function Generator

Frequency Characteristics

 

Frequency Range

 

 

Sine

1µHz ~ 40MHz

Square

1µHz ~ 40MHz

All Other Waveforms

1µHz ~ 100kHz

Frequency Stability

±1 × 10-6 (22°C ± 5°C)

Resolution

1µHz

Frequency Accuracy

≤ ±5 × 10-6 (22°C ± 5°C)

Data entry Units

s, ms, Hz, kHz, MHz

Waveform Characteristics

 

Main waveforms (Sine, square)

 

 

Amplitude resolution

12 bits

Sample Rate

200MSa/s

Sine

 

 

Harmonic Distortion of Sine Wave*

≤ -50dBc (frequency ≤ 5MHz)
≤ -45dBc (frequency ≤ 10MHz)
≤ -40dBc (frequency ≤ 20MHz)

≤ -35dBc (frequency ≤ 40MHz)

Total Harmonic Distortion*

0.1% (20Hz ~ 100kHz)

Square

 

 

Rise and fall time*

≤ 15ns

* = Note: Test conditions for harmonic distortion, sine distortion, rise/fall time Output Amplitude 2Vp-p, Environmental temperature: 25°C ± 5°C

 

Other built-in waveforms:

 

 

27 build-in standard and complex waveforms.

Sine, Square, Triangle, Positive Ramp, Falling Ramp, Noise, Pulse, Positive Pulse, Negative Pulse, Positive DC, Negative DC, Stair wave, Coded Pulse, Full wave rectified, Half-wave rectified, Sine transverse cut, Sine vertical cut, Sine phase modulation, Logarithmic, Exponential, Half-round, sin x/x, Square root, Tangent, Cardiac, Earthquake, Combination

Waveform Length

4096 dots

Amplitude Resolution

10 bits

Pulse Wave

 

 

Duty Cycle

0.1% ~ 99.9% (below 10kHz), 1% ~ 99% (10kHz ~ 100kHz)

Rise/Fall Time

≤ 100ns (Duty Cycle 20%)

DC signal characteristics

 

 

DC range

≤ 10mV - 10V (high impedance)

DC Accuracy

≤ ±5% of setting +10mV (high impedance)

Amplitude Characteristics

 

Amplitude Range

2mV ~ 20Vpp (open circuit), 1mV ~ 10Vpp (50Ω)

Resolution

2µVpp (open circuit), 1µVpp (50Ω)

Accuracy

±1% + 0.2mV (sine wave relative to 1kHz)

Stability

±0.5% / 3 hours

Flatness

 

 

For amplitude ≤ 2Vpp

±3% (frequency ≤ 5MHz), ±10% (5MHz < frequency ≤ 40MHz)

For amplitude > 2Vpp

±5% (frequency ≤ 5MHz), ±10% (5MHz < frequency ≤ 20MHz)
 ±20% (frequency > 20MHz)

Output Impedance

50Ω

Output Units

Vpp, mVpp, Vrms, mVrms, dBm

DC Offset Characteristics

 

Offset Range (open circuit)

 ±10Vpk ac + dc (Offset ≤ 2 × peak-to-peak amplitude)

Offset Resolution

2µV (open circuit), 1µV (50Ω)

Offset Error

±5% of setting + 10mV (Ampl. ≤ 2Vpp into open circuit)
±5% of setting + 20mV (Ampl. > 2Vpp into open circuit)

AM Characteristics

 

Carrier Waveforms

sine or square

Modulation Source

internal or external

Internal Modulating Waveform

sine, square, triangle, rising/falling ramp

Frequency of modulating signal

100µHz ~ 20kHz

Distortion

≤ 2%

Modulation Depth

1% ~ 120%
1% ~ 80% (frequency > 40MHz, Ampl > 2Vpp into open circuit)

Modulation Error

±5% + 0.2% (100µHz < frequency ≤ 10kHz)
±10% + 2% (10kHz < frequency ≤ 20kHz)

Max. Amplitude of ext. input signal

3Vp-p (-1.5V ~ +1.5V)

FM Characteristics

 

Carrier Waveforms

sine or square

Modulation Source

internal or external

Internal Modulating Waveform

sine, square, triangle, rising/falling ramp

Frequency of modulating signal

100µHz ~ 10kHz

Deviation

Max. 50% of carrier frequency for internal FM
Max. 100kHz (carrier frequency ≥ 5MHz) for external FM, with input signal voltage 3Vp-p (-1.5V ~ +1.5V)

FSK Characteristics

 

Carrier Waveform

sine or square

Control Mode

internal or external trigger (external: TTL level, low level F1, high level F2)

FSK Rate

0.1ms ~ 800s

PSK Characteristics

 

Carrier Waveform

sine or square

PSK

Phase 1 (P1) and Phase 2 (P2), range: 0.0 ~ 360.0°

Resolution

0.1°

PSK rate

0.1ms ~ 800s

Control Mode

internal or external trigger (external: TTL level, low level P1, high level P2)

Burst Characteristics

 

Carrier Waveform

sine or square

Burst Counts

1 ~ 10000 cycles

Time interval between bursts

0.1ms ~ 800s

Control Mode

internal, single or external gated trigger

Frequency Sweep Characteristics

 

Carrier Waveform

sine or square

Sweep Time

1ms ~ 800s (linear), 100ms ~ 800s (log)

Sweep Mode

Linear or Logarithmic

Start/Stop Frequency

same as frequency range of sine and square

External trigger signal frequency

DC ~ 1kHz (linear) DC ~ 10Hz (log)

Control Mode

Internal or external trigger

Inputs/Outputs

 

Main OUTput

 

 

Impedance

50Ω

Protection

Short circuit and overload protected

Amplitude

5Vp-p ± 5%

Output Impedance

600Ω

 

Output MOD OUT

 

 

Frequency

100Hz ~ 20kHz

Waveform

sine, square, triangle, rising/falling ramp

Amplitude

5Vp-p ± 5%

Output Impedance

600Ω

Modulation IN

3 Vpp = 100% Modulation

External Input Trig / FSK / Burst

Level - TTL

State Storage Characteristics

 

Storage Parameters

frequency, amplitude, waveform, DC offset values, modulation parameters

Storage Capacity

10 user configurable stored states

Universal Counter

Frequency Range

 

Frequency Measurement

1Hz ~ 100MHz

Totalize mode

50MHz max

Input Characteristics

 

Sensitivity

 

 

Input attenuator disabled

50mVrms (f: 10Hz ~ 50MHz), 100mVrms
(f: 1Hz ~ 100MHz)

Input attenuator enabled

0.5Vrms (f: 10Hz ~ 50MHz), 1Vrms
(f: 1Hz ~ 100MHz)

Max. Input Voltage Allowed

100Vp-p (f ≤ 100kHz), 20Vp-p (1Hz ~ 100MHz)

Input Impedance

R > 500kΩ, C < 30pF

Coupling

AC

Waveform

sine or square

Low Pass Filter

cut off frequency about 100kHz (with internal attenuation: ≤ -3dB) with external attenuation: ≥ -30 dB (f > 1MHz)

Gate Time Setting

10ms ~ 10s continuously adjustable

Display Bits

8 (for gate Time > 5s)

Totalize Capacity

≤ 4.29 × 109

Control Mode

manual or external gate control

Accuracy

time base error ± trigger error (when signal SNR > 40dB, trigger error ≤ 0.3)

Time base

 

 

Frequency

10MHz

Stability

±1 × 10-6 (22°C ± 5°C)

General

Power Supply

198 ~ 242V or 99 ~ 121V, Frequency: 47 ~ 63Hz

Power Consumption

< 35VA

Operating Temperature

0° to +40 °C

Operating Humidity

80% R.H

Storage Temperature

-40°C to 70°C

Dimensions (W × H × D)

10” x 3.93” x 14.56”
(255 mm × 100 mm × 370 mm)

Weight

6.6 lbs, (3 kg)

Remote Interface

RS232

Safety designed to

EN61010

EMC tested to

EN55022, EN55024, EN61326, EN60100