IO-105 Dual-Trace Oscilloscope

The Heathkit IO-105 Dual-Trace Oscilloscope is a solid-state instrument
with many features found only in more expensive laboratory equipment.
Calibrated vertical and horizontal circuits permit precise voltage
and frequency measurements of even the most complex waveforms. The
rugged construction and dependable operation make it a versatile tool
for the service bench, “in-home” use, or design work.

SPECIFICATIONS
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VERTICAL CHANNELS

Accuracy. . . . . . . . . . . . . . . . .  +/- 3 %

Input Impedance . . . . . . . . . . . . .  1 Mohms shunted by 35 pF

Maximum Input Voltage . . . . . . . . . .  600 volts
	
Sensitivity, AC or DC . . . . . . . . . .  0.05 volts per centimeter

Frequency Response. . . . . . . . . . . .  DC to 15 MHz: 3 db with 4 cm deflection

Vertical Windows. . . . . . . . . . . . .  2 minimum
		
Rise Time . . . . . . . . . . . . . . . .  24 nsec

Overshoot . . . . . . . . . . . . . . . .  <10 %

Attenuator. . . . . . . . . . . . . . . .  9-positions in a 1—2—5 sequence. 0.05 volts/cm
					   to 20 volts/cm. Variable gain (uncalibrated)
					   through entire range

Vertical Display in Sweep Mode. . . . . .  Channel 1, channel 2, channel 1 and channel 2
					   alternately or channel 1 and channel 2 chopped (50 kHz)

HORIZONTAL CHANNEL

Time Base . . . . . . . . . . . . . . . .  Triggered with 18 calibrated rates: 0.2 ?s/cm
					   to 100 ms/cm in a 1—2—5 sequence, +/- 3 %.
					   Continuously variable (uncalibrated) within the same range.

Sweep Magnifier . . . . . . . . . . . . .  X5 (time base accuracy is +/- 5 % when the magnifier is being used)

External Horizontal Input . . . . . . . .  750 millivolts/cm (uncalibrated and not adjustable).
					   100 kohm minimum input impedance, dc to 100 kHz 

X—Y MODE

Sensitivity . . . . . . . . . . . . . . .  0.05 volts/cm to 20 volts/cm, +/- 3 %

Frequency Response  . . . . . . . . . . .  -3 db at 100 kHz (Channel 2)

Phase Shift Between Channels  . . . . . .  +/- 5 degrees or less from 50 kHz within graticule limits

TRIGGERING

Delay . . . . . . . . . . . . . . . . . .  Approximately 600 nsec

Auto  . . . . . . . . . . . . . . . . . .  Zero crossing +/- 2 cm of zero crossing

Norn  . . . . . . . . . . . . . . . . . .  Within viewing area

Source  . . . . . . . . . . . . . . . . .  Channel 1, channel 2 or channels 1 and 2

Polarity  . . . . . . . . . . . . . . . .  + or – slope

Coupling  . . . . . . . . . . . . . . . .  AC or DC

Sensitivity . . . . . . . . . . . . . . .  Internal: ½ cm
					   External: 100 mV minimum, 7 V maximum 

GENERAL

Blanking In . . . . . . . . . . . . . . .  TTL compatible (Logic 0 – blank)

Gate Out  . . . . . . . . . . . . . . . .  3.5 volts minimum

Input Connections . . . . . . . . . . . .  Vertical: Coaxial, BNC
					   Horizontal: Binding post
					   External trigger: binding posts on Ύ” center with ground

CRT Accelerating Potential. . . . . . . .  Approximately 2200 VDC regulated

CRT Type  . . . . . . . . . . . . . . . .  8 x 10, rectangular, flat face, D14-107GA

Retrace suppression . . . . . . . . . . .  DC coupled unblanking of the CRT

Graticule . . . . . . . . . . . . . . . .  8 cm x 10 cm grid, edge lighted

Power Requirements  . . . . . . . . . . .  110 -130 or 210 – 250 VAC, 50/60 Hz, 60 Watts

Overall Dimensions  . . . . . . . . . . .  10-5/8” high, 12-3/8” wide, 15” long

Net Weight  . . . . . . . . . . . . . . .  28 lbs