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Hp 180D oscilloscope with a 1801A and a 1821 plug-ins
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Model 180C/D General Information
1-2. This manual provides operating and service information for the Hewlett-Packard Models 180C and 180D Oscilloscopes. The manual is divided into eight sections, each covering a specific topic or aspect of the instrument. All schematics are located at the rear of the manual and can be unfolded and used for reference while reading any part of the manual.
1-3. This section contains complete instrument specifications, a description of features, warranty information, data for manual and instrument identification, and information regarding accessories available for use with the instrument. Table 1-2 lists and describes the abbreviations used in this manual.
1-5. The Model 180C/D. (Figure 1-1) is a solid-state, lightweight laboratory and general-purpose oscilloscope with plug-in capabilities. The instrument is designed to display complex high frequency waveforms and to measure alternating and direct-current voltages. Complete instrument specifications are given in Table 1-1.
1-6. The Model 180C is a cabinet type instrument with a built-in tilt stand, convenient carrying handle on top, and feet mounted on both bottom and rear for either bench or upright operation.
1-7. The Model 180D is a rack type instrument with a built-in tilt stand and bottom-mounted feet. It may be bench ,operated or rack mounted. Figure 1-3 provides the outline dimensions.
1-8. A CRT accelerating potential of 15 kV provides bright visual display and high photographic writing speeds. This simplifies the measurement of low duty cycle signals.
1-9. The Model 180C/D has solid-state circuitry throughout for minimum size and weight with maximum reliability. Power consumption, with plug-ins, is less than 110 watts at normal line voltage. The instrument is convection cooled and designed to operate within specifications at temperatures between 0 C and 55 C with up to 95% relative humidity at 40 C.
1-10. All power, supplies, a dual output calibrator, horizontal amplifier, gate amplifier and the CRT are contained in the instrument. Operation at either 115V or 230V ac is selectable by a switch located on the rear panel of the oscilloscope.
1-11. Located on the rear panel are connectors for time base output of main and delayed gate, and main and delayed sweep signals. Connection for input of an external signal for intensity modulation (Z-axis input) is also provided at the rear panel.
1-12. The Model 180C/D is designed to operate with a number of different plug-ins. Presently available plug-ins provide a wide choice of operating capabilities such as wide bandwidth, dual or four channel operation, single or delayed sweeps and sampling or time-domain ref lectometer operation.
1-13. To facilitate servicing, the modular power supply may be disconnected and removed from the instrument for access to all components. It may also be operated from the built-in extender cable to simplify and speed up maintenance.
1-14. A calibrator provides a square-wave signal of approximately 1 kHz with a risetime of less than 3 usec. The calibrator output is available at the front panel at amplitudes of 250 mV and 10V p-p with an accuracy of 1%. The signal may be used to check horizontal and vertical deflection factors and to compensate divider probes.
1-15. The oscilloscope horizontal amplifier accepts sweep signals from the time base plug-in or an external source. The external input bandwidth is dc to 5 MHz dc-coupled, and 5 Hz to 5 MHz ac-coupled.
1-16. Three horizontal deflection factor ranges are front panel selectable: 1 V/div (X1) 5%, 0.2 V/div (X5) 5%, and 0.1 V/div (X10) 5%. In addition, a vernier control provides continuous adjustment between ranges for external inputs. The maximum external input level is 300 Vdc, ac-coupled, with a dynamic range of 20V.
1-17. A beam finder pushbutton control assists the operator in rapidly bringing a displaced beam on screen. Its use increases intensity and reduces vertical and horizontal amplifier _ gain to quickly locate traceposition.
Table 1-1. Model 180C/D Specifications
CATHODE- RAY TUBE AND CONTROLS
TYPE: post accelerator, approx 15 kV accelerating potential; aluminized P31 phosphor.
GRATICULE: 8 x 10 div internal graticule, 0.2 div subdivisions on major axes. (1 div = 1 cm.) Front panel recessed screwdriver adjustment aligns trace with graticule. Scale control illuminates CRT phosphor when viewing with hood or taking photographs.
BEAM FINDER: returns trace to CRT screen regardless of setting of horizontal, vertical, or intensity controls.
INTENSITY MODULATION (External Input)
Input: approx +2V, >50 ns pulse width (510 MHz sine wave) will blank trace of normal intensity.
Maximum Input: 20V (dc + pk ac).
PHOTOGRAPHIC WRITING SPEED: 1500 cm/ usec. Measured using 10,000 ASA film without film fogging and a camera with f/1.3 lens, and a 1: 0.5 object-to-image ratio. Writing speed may be increased substantially by using film fogging techniques, P11 phosphor and faster camera lenses.
TYPE: approx 1 kHz square wave, <3 usec risetime.-
VOLTAGE: two outputs, 250 mV p-p and 10V p-p into >1 megohm; accuracy, 1%.
Bandwidth: dc to 5 MHz dc-coupled; 5Hz to 5 MHz ac-coupled.
Deflection Factor: 1 V/div, x1; 0.2 V/div, x5;
0.1 V/div, xl 0; accuracy 5%. Vernier provides
continuous adjustment between ranges. Dynamic Range: 20V.
Maximum Input: 600 Vdc (ac-coupled input).Input RC: approx 1 megohm shunted by approx 30 pF.
Magnifier: x5, x10, accuracy 5% (with 3% accuracy time base).
Four rear panel, emitter follower outputs provide main and delayed gates, main and delayed sweeps, or vertical and horizontal outputs when used with TDR/Sampling plug-ins. Maximum current available, 3 mA. Outputs will drive impedances of >1000 ohms without distortion.
(Mainframe operates within specifications over the following ranges.)
HUMIDITY: to 95% relative humidity to 40 C. ALTITUDE: to 15,000 ft.
VIBRATION: vibrated in three planes for 15 min each with 0.010 in. excursion, 10 to 55 Hz.
POWER: 115 or 230V, 10%; 48 to 440 Hz; normally <110W with plug-ins at normal line. Maximum mainframe power, 200 VA.
Cabinet Model 180C: 7-7/8 in. wide, 11-3/8 in. high, 21-1/4 in. deep behind panel (200 x 289 x 540 mm).
Rack Model 180D: see outline drawing.
