Atec 395 User Manual

Model 395

Specifications

Specifications apply within the specified environmental conditions after a 20 minute warm-up.

Amplitude

Range: 10 mVp-p to 10 Vp-p into 50 Ω. Resolution: 3.0 digits. Accuracy: 25 ± 10° C: ± (1% + 2 mVp-p).

Offset

Range: ± 5 V into 50 Ω. Resolution: 3 digits. Accuracy: 25 ± 10° C: ± (1% + 20 mV).

Standard Waveforms

Sine, square, triangle, pulse, pulse trains, DC, positive/negative ramp, positive/negative haversine, (sin x)/x, and five noise functions.

Frequency (Sine and Haversine)

Range: 1 µHz to 40 MHz. Resolution: (Resolution limited by 1 µHz.).

≤ 20 MHz: 10 digits; ± 30 ppm. > 20 MHz: 4 digits; ± 100 ppm.

Frequency (Square)

Range: 1 µHz to 50 MHz. Resolution: 4 digits; ± 100 ppm.

Frequency (Triangle)

Range: 1 µHz to 10 MHz. Resolution:

≤ 100 kHz: 10 digits; ± 30 ppm. > 100 kHz: 4 digits; ± 100 ppm.

Frequency (Ramp)

Range: 1 µHz to 2 MHz. Resolution:

≤ 100 kHz: 10 digits; ± 30 ppm. > 100 kHz: 4 digits; ± 100 ppm.

Frequency (Sin (x)/x)

Range: 1 µHz to 1 MHz Resolution:

≤ 100 kHz: 10 digits; ± 30 ppm > 100 kHz: 4 digits; ± 100 ppm

Waveform Quality

Square Transition Time: < 8 ns. Square Aberrations: < (5% + 20 mV). Sine Distortion:

< 100 kHz: 0.15% (-56 dBc). < 5 MHz: No harmonic > -35 dBc.

Arbitrary Waveforms

Sampling Frequency

Range: 100 mS/s to 100 MS/s. Resolution: 4 digits. Accuracy: ± 100 ppm.

Waveform Memory Size

64 k points; 256 k points optional.

Minimum Waveform Size: 10 points. Vertical Resolution: 12 bits. Output Filters (Selectable): 20 MHz Elliptic (8

pole), 40 MHz Elliptic (8 pole), 10 MHz Bessel (2 pole), no filter. Waveform Sequencing: Up to 4 waveforms can be linked. Each waveform can have a repeat (loop) count of up to 65,535 or run continuously, conditional upon an external trigger event (repeat until event true). Additionally, a sequence of waveforms can be repeated up to 524,287 times or run continuously.

Pulse Waveforms

Up to 10 pulses may be independently programmed in a pulse pattern. Parameters that can be independently programmed for each pulse are rise time, fall time, width, delay, and amplitude.

For Periods ≤ 655 µs:

Range: 100 ns to 655 µs. Resolution: 20 ns. Accuracy: ± 100 ppm. Rise/Fall:

Fixed: 8 ns. Variable: 50 ns to 500 µs. Resolution: 8 ns. Accuracy: ± 0.1% ± 5 ns (< 8 ns for fixed rise/fall).

Delay:

Range: -600 to +600 µs. Resolution: 10 ns. Accuracy: ± 0.1% ± 5 ns.

Width:

Range: 10 ns to 655 µs. Resolution: 10 ns. Accuracy: ± 0.1% ± 5 ns.

For Periods > 655 µs:

Range: 655 µs to 10 s. Resolution: 4 digits. Accuracy: ± 100 ppm. Rise/Fall: 0.1% to 79% of period (or < 8 ns). Delay: -99.9% to +99.9% of period. Width: 0.002% to 99.9% of period.

Noise

White (Analog) Noise:

Uniform frequency distribution with programmable noise bandwidth. Noise BW Range: 10 mHz to 10 MHz. Sequence Length:

Standard: 2 With Option 002: 2

- 1, n = 6 to 16.

- 1, n = 6 to 17.

Model 395

Digital Noise:

Digital noise provides a random 0,1 pattern with programmable sequence length. Clock Range: 10 mHz to 100 MHz. Sequence Length:

Standard: 2 With Option 002: 2

Comb:

Uniformly distributed frequency spectra within a well-defined frequency band. Start/Stop Range: 1 Hz to 10 MHz. Number of Lobes: 3 to 256.

Signal-Plus-Noise, Signal-Plus-Comb:

Adds analog noise or comb to any standard or arbitrary waveform with precise, controlled noise-tosignal ratio. N/S Ratio: 1% to 99% Vp-p. Resolution: 1%.

- 1, n = 6 to 16.

- 1, n = 6 to 17.

Operational Modes

Continuous: The selected waveform is output continuously at the programmed frequency. Gated: The selected waveform is output continuously at the programmed frequency while the selected trigger signal is true. Triggered: Upon transition of the selected trigger from false to true, the number of cycles specified by the count is output at the specified frequency. Burst count is programmable from 1 to 1,048,575. (One to 524,287 for waveform sequence operation.) Sweep: Frequency sweep.

Triggering

Trigger Sources: 4 trigger sources: External TRIG IN BNC, internal trigger generator, front panel manual trigger key, and remote trigger command. Trigger Level: The trigger level at the TRIG IN BNC is programmable.

Range: -10 V to +10 V. Trigger Slope: Positive or negative. Internal Trigger Source

Range: 200 ns to 1000 s. Resolution: 100 ns limited by 6 digits.

Sync Output

Sync output can be selected from among the following 7 sources: waveform sync, trigger signal, burst done, loop done, sweep marker, position marker, pen lift.

Modulation

For both standard and arbitrary waveforms.

Internal Frequency Modulation

Carrier Signal

Source: Sine Wave

Center Frequency Range: 0.01 Hz to 40 MHz Deviation Frequency Range: 0.01 Hz to 40 MHz. Note: Center frequency plus deviation frequency must be ≤ 40 MHz.

Modulating Signal

Source: Any waveform except noise, AM, FM, or pulse. Modulation Frequency Range: 0.01 Hz to 40 MHz.

Internal Amplitude Modulation

Modes

AM: 0 to 200% modulation SCM: 200% modulation

Carrier Signal

Source: Sine wave Carrier Frequency Range: 0.01 Hz to 40 MHz

Modulating Signal

Source: Any waveform except noise, AM, FM, or pulse. Modulation Frequency Range: 0.01 Hz to 40 MHz.

External Amplitude Modulation

Normal AM: 0 to 100% modulation. Suppressed Carrier Modulation (SCM):

± 100% modulation.

Signal Summing

External signals can be summed directly to the Model 395 output through the SUM IN BNC.

Sweep

Standard and arbitrary waveforms can be swept.

Sweep Start/Stop

Range: 1 mHz to 20 MHz. Resolution: 4 digits limited by 1 mHz.

Sweep Time

Range: 30 ms to 1000 s. Resolution: 1 ms.

Sweep Types:

Sweep off, continuous, continuous with reverse, triggered, triggered with reverse, triggered with hold, triggered with hold and reverse, and manual.

Sweep Spacing:

Linear and logarithmic.

Outputs

Reference Output (50 Ω):

TTL level into open circuit; > 1.2 Vp-p .

Main Output (50 Ω):

Output may be selected on or off. AM Input (2.5 kΩ): ± 2.5 V. Sweep Output (1 kΩ): 0 to 10 V ramp proportional to completion of sweep.

Sync Output (50 Ω)

Low Level: < 0.4 V into 50 Ω.

High Level: > 2.0 V into 50 Ω. Rise/Fall Time: < 7 ns.

Inputs

Trigger Input (2 kΩ)

Level: ± 10 V (programmable). Maximum Frequency: 10 MHz.

Sum Input (600 Ω)

Level: ± 5 Vp-p max. Bandwidth: > 30 MHz. Protection: Over-voltage to ± 10 V.

Reference Input (5 kΩ)

Level: 1 Vp-p minimum, 10 Vp-p maximum; 50 Vdc maximum. Frequency: 10 MHz ± 5%.

General

Remote Operation

RS-232 interface is standard. IEEE-488.2 (SCPI compatible) GPIB interface is optional.

Environment

Designed to MIL-T-28800C Class 5. Temperature Range: Operates from 0° to +50°C: -20° to +70°C for storage. Dimensions: 35.6 cm (14.00 in) wide,

13.3 cm (5.22 in) high, and 39.4 cm (15.5 in) deep. Weight: Approximately 7.7 kg (17 lb) net;

10.0 kg (22 lb) shipping. Power: 90 to 132, 198 to 252 volts rms; 48 to 440 Hz; 1 phase; < 80 VA.

Ordering Information

Model 395: 100 MHz synthesized Arbitrary Waveform Generator with serial cable and Quick Start Demo Disk. Option 001: IEEE-488 Interface/Direct DSO Waveform Transfer

Option 002: 256k Extended Memory Option 004: Rack Mount Kit Model 485: WaveForm DSP, Windows-based

software for creating and editing complex wave forms.