Model 1200B - Krohn-Hite

Model 1200B - Krohn-Hite
Model 1200B
LINEAR SWEEP FUNCTION GENERATOR
Model 1200B
0.2Hz to 3MHz
Linear Sweep
Function Generator
• Waveforms: Sine, Square, Triangle
• Linear Sweep: Range, 1500:1, up or down;
duration adjustable 1000s to 1ms.
• Main Output: 20Vp-p, open circuit;
simultaneous LO (–20dB) output.
• Variable DC Offset: ±10V.
• External Voltage Control (VC): 1500:1
• TTL Output: 15ns rise/fall times
• Ramp Output: +5V peak, 0.001Hz to 1kHz
DESCRIPTION
The Krohn-Hite Model 1200B is an economically priced function generator that features linear, up or
down frequency sweeps.
The 1200B provides sine, square and triangle waveforms from 0.2Hz to 3MHz. The frequency may be
manually tuned, continuously swept up or down, or externally controlled, all over a 1500:1 range on
each of the three multiplier bands. An additional fine-tune vernier provides an adjustment of ±2.5% of
the frequency setting. Internal sweep rate is continuously adjustable from 1ms to 1000s. An external
voltage of zero to ±3 volts can be used to modulate the frequency about the displayed frequency
setting.
The main output amplitude is adjustable from 5mVp-p to 20Vp-p, open
WAVEGUARD™ output protection circuit solves the problem of blown output
most other unprotected generators, when a voltage is inadvertently placed
output terminals. The WAVEGUARD™ circuit clamps the external voltage
automatically when the external voltage is removed.
circuit. Our exclusive
transistors occurring in
across the generator’s
to ground and resets
The output of the internal ramp generator is available at the front panel Ramp output connector. It
consist of a +5V fixed linear ramp whose frequency is variable from 0.001Hz to 1kHz. The ramp may be
used independent of the main generator output, in the non-sweep mode.
__________________________________________________________________________________
Krohn-Hite Corporation, 15 Jonathan Drive, Unti 4, Brockton, MA 02301-5566 U.S.A.
Tel: 508-580-1660; Fax: 508-583-8989; email: sales@krohn-hite.com
Page 1 of 4
V1.1, 11-25-15, 1200BData.docx
Model 1200B
LINEAR SWEEP FUNCTION GENERATOR
ADDITIONAL FEATURES
Additional features include: variable DC offset control; auxiliary TTL output with rise an fall time less
than 15ns and capable of driving 10 TTL loads; separate HI and LO level output terminals, 0dB and
20dB, simultaneously controlled by the infinite resolution amplitude control; sinewave distortion typically
0.3% and frequency response better than 0.1dB.
We think you’ll agree, the Model 1200B is ideally suited for a wide choice of applications that include
engineering schools and universities, laboratory design, response testing of amplifier and filter
networks, production line testing, radio repair service, plus general testing and measurement.
SPECIFICATIONS
Specifications apply at 25°C, ±5°C at maximum output voltage, and frequency control setting between
2 and 300, unless otherwise noted.
WAVEFORMS: Sine, square, triangle, TTL and ramp.
FREQUENCY RANGE: 0.2Hz to 3MHz.
FREQUENCY CONTROL: Single turn log control, tunable from 0.2 to 300 in Hertz, and a 3 position
multiplier providing a 1500:1 coverage in each multiplier position. Separate fine-tune vernier provides
5% adjustment.
Band
Multiplier
Frequency Range (Hz)
1
1
0.2-300
2
100
20-30k
3
10k
2k-3M
FREQUENCY ACCURACY: ±5% typical, ±20% maximum.
MAIN OUTPUT
Waveforms: Sine, square, triangle.
Output:
HI LEVEL (0dB): 20Vp-p open circuit, 10Vp-p into 50 ohms.
LO LEVEL (–20dB): 2Vp-p open circuit, 1Vp-p into 50 ohms.
Isolation: Can be floated up to ±200V peak between outputs and instrument case.
Amplitude Stability (maximum amplitude):
10 Minutes: 0.02%
24 Hours: 0.1%
__________________________________________________________________________________
Krohn-Hite Corporation, 15 Jonathan Drive, Unti 4, Brockton, MA 02301-5566 U.S.A.
Tel: 508-580-1660; Fax: 508-583-8989; email: sales@krohn-hite.com
Page 2 of 4
V1.1, 11-25-15, 1200BData.docx
Model 1200B
LINEAR SWEEP FUNCTION GENERATOR
Amplitude Control: Infinite resolution vernier. Minimum output less than 5mV.
Frequency Response: Sinewave, <0.1dB from 0.2Hz to 300kHz, 1dB to 3MHz.
Sinewave Distortion: <0.5% from 2Hz to 300kHz; 3% to 3MHz.
Squarewave:
Rise and Fall Time: <40ns.
Total Aberrations: <5% with 50 ohm termination.
DC Components: All waveforms are normally symmetrical about ground with nominal zero DC volts.
At maximum output, drift is <5mV per degree C.
Triangle Linearity: >99% from 0.2Hz to 300kHz; 95% to 3MHz.
Time Symmetry: Sine, square, triangle, 99% from 2Hz to 300kHz.
OPERATIONAL MODES: Continuous or linear sweep.
SWEEP CHARACTERISTICS
Sweep Range: Maximum 1500:1 up or down; upper and lower limits set by FREQUENCY control and
START FREQUENCY control.
Sweep Duration: 1000s to 1ms in two ranges, 1000s to 1s, 1s to 1ms.
Ramp Output: +5V peak sawtooth, period adjustable with DURATION control, 0.001Hz to 1kHz.
Ramp Retrace: <75µs.
Output Impedance: constant 600 ohms.
EXTERNAL FREQUENCY CONTROL (VC)
Range: 1500:1
Voltage Control Range: Zero to ±3V. (A maximum of ±25V may be applied to the VC input without
damage to the circuitry.
Input Impedance: 10k ohms.
VARIABLE DC OFFSET: ±10V open circuit, ±5V into 50 ohms. Push-button ON/OFF control with
separate vernier. (Reduced by 20dB on LO output).
TTL OUTPUT: TTL pulse at generator frequency, drives up to 10 TTL loads. Rise and Fall Times:
15ns.
__________________________________________________________________________________
Krohn-Hite Corporation, 15 Jonathan Drive, Unti 4, Brockton, MA 02301-5566 U.S.A.
Tel: 508-580-1660; Fax: 508-583-8989; email: sales@krohn-hite.com
Page 3 of 4
V1.1, 11-25-15, 1200BData.docx
Model 1200B
LINEAR SWEEP FUNCTION GENERATOR
GENERAL
Operating Temperature Range: –10°C to 45°C.
Controls:
Front Panel: Contains FREQUENCY control, frequency VERNier, START FREQuency,
DURATION, AMPLITUDE, DC OFFSET and push-button controls for frequency range MULTiplier,
MAIN OUTput waveform selector, SWP on, sweep range multiplier, and POWER switch.
Rear Panel: Rear panel contains LINE switches, SYMmetry ADJust, DC LEVEL ADJustment and
GROUND switch.
Terminals: Front panel only, BNC connectors for HI and LO outputs, TTL output, VC input, and RAMP
output.
Power Requirements: Switch selectable, 90-110, 108-132, 180-220 or 216-224 volts, single phase,
50-400Hz, 13 watts.
Dimensions and Weights:
Cabinet Size/Weight
U.S.
Metric
H
3.5”
9cm
W
9”
23cm
D
8.5”
21.7cm
Net
5 lbs
2.3kg
Gross
7 lbs
3.2kg
OPTIONS
Rack Mount Kit: Part No. RK-39 permits the installation of the Model 1200B into a standard 19" rack
spacing.
Extended 1 Year Warranty: Part No. EW1200B.
OPTIONAL ACCESSORIES
CAB-025: Cable, BNC, 3ft, Low Noise
Specifications subject to change without notice.
__________________________________________________________________________________
Krohn-Hite Corporation, 15 Jonathan Drive, Unti 4, Brockton, MA 02301-5566 U.S.A.
Tel: 508-580-1660; Fax: 508-583-8989; email: sales@krohn-hite.com
Page 4 of 4
V1.1, 11-25-15, 1200BData.docx
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