Section I Figure 1-1 1-0 Figure 1-1. Model <strong>175A</strong> Oscilloscope with accessories furnished (Model 1750A and Model 1780A Plug-In Units available separately) Model <strong>175A</strong> 01 526- 2
Model <strong>175A</strong> 1-1. DESCRIPTION. 1-2. The @ Model <strong>175A</strong> Oscilloscope is acalibrated general-purpose test instrument with a vertical band- width of 50 megacycles and a 6 x 10 cm display. @- tional plug-in units and accessories are available to increase the versatility of this instrument. Specifi- cations are listed in Table 1-1. 1-3. AUXILIARY EQUIPMENT. 1-4. Available plug-in units and accessories are listed in Table 1-2. SECTION I GENERAL INFORMATION Section I Paragraphs 1-1 to 1-8 b. Accessories. Each oscilloscope is supplied with two Model 10003A (AC-21M) high-impedance probes and a detachable power-cable. 1-5. INSTRUMENT IDENTIFICATION. 1-6. Hewlett-Packard uses a two-section eight-digit serial number (000-00000). If the first three digits of the serial number on your instrument do not agree with those on the title page of this manual, change sheets supplied with the manual will define differences between your instrument and the Model <strong>175A</strong> described in this manual. 1-7. WARRANTY. a. Plug-ins. Plug-in units for the Model <strong>175A</strong> in- 1-8. Both the cathode-ray tube (crt) and the Model clude vertical amplifiers which collectively cover <strong>175A</strong> carry Hewlett-Packard warranties. The crt 5 mv/cm to 20 v/cm sensitivities and dc to 50-mc warranty is illustrated in figure 1-2, andacopy is in- bandwidth. Horizontal units include single, sweep, cluded at the back of this manual for your use in the sweep delay, a time-mark generator, and a display event of tube failure within the warrantyperiod. Model scanner. <strong>175A</strong> warranty is also at the back of this manual. SWEEP GENERATOR Range: 0.1 psec/cm to 5 sec/cm in 1,2,5 sequence, 24 steps. Vernier provides continuous adjustment between ranges and extends slowest sweep to at least 12.5 sec/cm. Magnification: X10 Accuracy: *3%, *5% with X10 magnifier. Triggering: Internal, ac coupled; power line; external, ac or dc coupled. Triggering Sensitivity: Internal, approximately 2 mm vertical deflection at 1 mc, 2 cm at 50 mc. External, approximately 0.25 volt peak-to-peak at 1 mc, approximately 0.5 volt peak-to-peak at 50 mc. Triggering Point: Controls allow selection of level and slope. HORIZONTAL AMPLIFIER Bandwidth: DC coupled, DC to 500 kc; AC coupled, 2 cps to 500 kc. Sensitivity: 2 ranges; 0.1 volt/cm and 1 volt/cm, accuracy *5%. Vernier provides continuous adjustment between the ranges and extends minimum sensitivity to 10 volts/cm. Input Impedance: 1 megohm shunted by approx 30pf. MAIN VERTICAL AMPLIFIER Rise Time: Less than 7 nsec. Table 1-1. Specifications CALIBRATOR Type: 1 kc square wave, approx 3 psec rise time. Voltage: 2 ranges, lv and 1Ov peak-to-peak *l% at 15°C to 35°C ambient, i3% 0°C to 55°C ambient. CATHODE RAYTUBE ANDCONTROLS Type: Post accelerator, 12 kv accelerating poten- tial, ($4 Type G205. P31 aluminized phosphor standard, other phosphor available are P2, P7, and P11. Graticule: Internal, parallax free 6 x 10 cm, marked in cm squares. 2-mm subdivision on major axis. Intensity Modulation: Approximately +20-volt pulse will blank trace of normal intensity (BNC connector on rear panel). GENERAL Power: 115 or 230 v *10%50 to 60 cps. 425 watts max, (depends on plug-ins used). Diminsions: 16-3/4 inches wide, 12-1/4 inches high, 24-3/8 inches deep overall; hardware furnished for quick conversion to 12-1/4-inch x 9-inch rack mount, 22 inches deep behind panel. Weight: Net approximately 70 lb maximum (depends on plug-ins used). Accessories Furnished: Two 10003A (AC-21M), 1O:l voltage divider probes; one detachable power cable; rack mounting kit. 015 26- 2 1- 1
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