IG-1277 PULSE GENERATOR

The Heathkit IG-1277 Pulse Generator can generate
almost any pulse signal required in a design laboratory,
a classroom, a service shop, an inspection and test facility,
or in a home hobby shop. Clearly labeled front panel switches
and controls ensure easy and fast operation. The pulse generator
has a trigger output, a TTL output, and a 50 ? offsettable output.

SPECIFICATIONS

PULSE CONTROLS

Period. . . . . . . . . . . . . . . . . . 200 nsec to 1 sec in 7 decade ranges.
					  Continuously variable between ranges with 1-decade vernier.

Width . . . . . . . . . . . . . . . . . . 100 nsec to 1 sec in 7 decade ranges.
					  Continuously variable between ranges with 1-decade vernier. 

Delay . . . . . . . . . . . . . . . . . . 100 nsec to 1 sec in 7 decade ranges.
					  Continuously variable between ranges with 1-decade vernier.

Maximum Duty Cycle. . . . . . . . . . . . Capable of 100%.

OPERATING MODES

Run/Gate. . . . . . . . . . . . . . . . . Generator free runs. Output is disabled when
					  external low signal is connected to Gate In.

External Trigger. . . . . . . . . . . . . External trigger input initiates output pulse
					  when threshold is exceeded. Trigger threshold
					  adjustable from -20 V to +20 V.

Trigger Delay . . . . . . . . . . . . . . Leading edge of pulse output and trigger output
					  are coincident. Trailing edges are independently
					  variable. Period control sets period of both;
					  Width control sets pulse width; Delay control
					  sets trigger width.

Pulse Delay . . . . . . . . . . . . . . . Leading edge of pulse is coincident with trailing
					  edge of trigger output. Period control sets period
					  of both; Width control sets delayed pulse width;
					  Delay control sets trigger width and pulse output delay.

Square Wave . . . . . . . . . . . . . . . Pulse Output is 50% of duty cycle, regardless of
					  Width control setting. Period control setting
					  corresponds to half-cycle of square wave; square
					  wave period = 2 X period. Trigger pulse width is
					  independently variable by Delay control.

Complement. . . . . . . . . . . . . . . . Pulse output is the complement at TTL and 50 ohm outputs.
					  Trigger Out remains unchanged.

Manual Trigger. . . . . . . . . . . . . . Allows one output pulse per push of the pushbutton switch.

OUTPUTS

50 ohms Out:

Range . . . . . . . . . . . . . . . . . . Combined amplitude and offset (independently variable)
					  within +/- 20 V limit (open circuit); +/- 10 V (50 ohms).

Amplitude . . . . . . . . . . . . . . . . 0.2 V to 20 V P-P (open circuit).
					  0.1V to 10 V P-P (50 ohms)

Rise/Fall Time (50 ?) . . . . . . . . . . Less than 15 nsec for 5 V level change.
					  Less than 30 nsec for 10 V level change.

TTL Out . . . . . . . . . . . . . . . . . Fixed level. Logic “0” less than 0.4 V,
					  logic “1” greater than 2.4 V. Rise and fall
					  time less than 25 nsec. Drives up to 10 TTL loads.

Trig Out. . . . . . . . . . . . . . . . . Fixed level. Logic “0” less than 0.4 V, logic “1”
					  greater than 2.4 V. Drives up to 3 TTL loads.
INPUTS

Gate/Trig In:

Trigger Mode. . . . . . . . . . . . . . . Input impedance 10 kohms shunted by 47 pf capacitance.
					  Maximum voltage (5 seconds): 150 VDC; 120 VAC 60 Hz.

Gate Mode . . . . . . . . . . . . . . . . Logic “0” less than 0.8 V, logic “1” greater than 2V.

GENERAL

Overlap Indicator . . . . . . . . . . . . LED lights when pulse width exceeds period; in
					  delay mode, when delay + pulse width exceeds period.

Front Panel BNC Connections . . . . . . . 50ohm Out
					  TTL Out
					  Trig Out
					  Gate/Trig In

Power Requirements. . . . . . . . . . . . 105 -- 125 VAC, 50/60 Hz, 30 Watts

Dimensions. . . . . . . . . . . . . . . . 3-3/4” high x 10” wide x 12-1/2” deep

Net Weight. . . . . . . . . . . . . . . . 7 lbs