CRT Readout Oscilloscope (MOS-626 (20MHz), MOS-648 (40MHz), MOS-658 (50MHz))




• Vertical axis o Sensitivity: 5mV ~ 20V / DIV, 12 steps in 1-2-5 sequence (x 5 MAG: 1mV / DIV). o Sensitivity accuracy: ≤ 3% (x 5 MAG ≤ 5%). o Vernier vertical sensitivity: Continuously variable to 1-2.5 or less of panel-indicated value. o Rise time: Approx. 17.5nS (x 5 MAG: Approx. 50nS). o Input impedance: Approx. 1MΩ / Approx. 25pF. o Square wave characteristics: Overshoot: ≤ 5% (at 10m V / DIV range); Other distortions and other ranges: 5% added to the above value. o DC balance shift: 5mV ~ 5V / DIV; ±0.5DIV, 1mV ~ 2mV / DIV ±2.0DIV. o Linearity: ≤ ±0.1DIV of amplitude change when waveform of 2DIV at graticule center is moved vertically. o Vertically modes: CH1:CH2 single channel. o DUAL: CH1 and CH2 are displayed simultaneously. o ALT or CHOP selectable at any sweep rate. o ADD: CH1 + CH2 algebraic addition. o Chopping repetition frequency: Approx. 250KHz. o Input coupling: AC, GND, DC. o Maximum input voltage: 300Vpeak (AC: frequency 1KHZ or lower); When set probe switch at 1:1, the maximum effective readout is 160Vpp (56Vrms at sine wave), or set probe switch at 10:1, the maximum effective readout is 1,600Vpp (560Vrms at sine wave). o Common mode rejection ratio: 50:1 or better at 50KHz sinusoidal wave. (When sensitivities of CH1 and CH2 are set equally). o Isolation between channels (at 5mV / DIV range): > 1000:1 at 50KHz; > 30:1 at 20MHz / > 30:1 at 40MHz. o CH1 signal output: At least 20mV / DIV into a 50Ω termination. Bandwidth is 50Hz to at least 5MHz. o CH2 INV BAL: Balanced point variation: ≤ 1DIV (reference at center graticule). • Triggering o Triggering source: CH1, CH2, LINE, EXT. o Coupling: AC: 20Hz to full bandwidth. o Slope: + / -. o Sensitivity: 20Hz ~ 2MHz:0.5DIV, TRIGALT: 2DIV, EXT: 200mV:2 ~ 2Mhz:1.5DIV, TRIGALT: 3DIV, EXT: 800mV; TV: Sync pulse more than 1DIV (EXT: 1V). o Triggering modes: Auto; Norm; TV-V; TV-H; (Both TV-V and TV-H synchronize only when the synchronizing signal is negative). o EXT triggering signal input:  Input impedance: Approx. 1MΩ / approx. 25p.  Max. input voltage: 300V (DC + AC peak), AC: Frequency not higher than 1KHz. • Horizontal axis o Frequency bandwidth: DC ~ 20MHZ (x 5 MAG: DC ~ 7MHz) AC coupling: Low limit frequency 10Hz. (With reference to 100KHz, 8DIV, frequency response with -3dB.) o Sweep time: 0.2μsec ~ 0.5sec / DIV, 20 steps in 1-2-5 sequence;. o Sweep time accuracy: ±3%. o Vernier sweep time control: ≤1 / 2.5 of panel - indicated value. o Sweep magnification: 10 times. o x 10MAG sweep time accuracy: ±5% (20nsec ~ 50nsec are uncalibrated). o Linearity: ±3%, x 10MAG: ±5% (20nsec ~ 50nsec are uncalibrated). o Position shift caused by x 10MAG: Within 2DIV. at CRT screen center. • X-Y mode: o Sensitivity: Same as vertical axis. (X-axis: CH1 input signal; Y-axis: CH2 input signal.) o Frequency bandwidth: DC to at least 500KHz. o X-Y phase difference: ≤ 3° at DC ~ 50KHz. • Z axis o Sensitivity: 5Vp-p (Positive-going signal: decreases intensity). o Frequency bandwidth: DC ~ 2MHz. o Input Impedance: Approx. 47kΩ. o Maximum input voltage: 30V (DC + AC peak, AC frequency ≤ 1KHz). • Calibration voltage o Waveform: Positive-going square wave. o Frequency: Approx. 1KHz. o Duty ratio: Within 48:52. o Output voltage: 2Vp-p ±2%. o Output impedance: Approx. 1kΩ. • CRT o Type: 6-inch rectangular type, internal graticule. o Phosphor: P31. o Acceleration voltage: Approx. 2KV. o Effective screen size: 8 x 10DIV (1DIV = 10mm (0.39in)). o Graticule: Internal. o Trace rotation: Provided. Features: • 20MHz / 40MHz dual channels. • High sensitivity 1mV / DIV. • CH1 output. • Z axis input. • ALT triggering function, two independent signals simultaneous. • Triggering level lock function, automatic synchronize function. • Cursor readout function, measure ΔV, ΔT,1 / ΔT. • High luminance, internal graticule CRT. • Pulse encorder switch. • Adjustable cursor function, easy to operate. • Cursor measurement function, aids to object measurement. • Visible coordinate sensitivity to 10V ~ 20V / DIV. • Model F has built-in 6 digit frequency counter.
Model Number MOS - 626 MOS - 648 MOS - 658 MOS-6060 MOS-6103
Frequency Range 20MHz 40MHz 50MHz 60MHz 100MHz