GENERAL RADIO COMPANY 1398-A Operating Instructions Manual page 6

, T Y P E l 3 9 8 - A P U L S E G E N E R A T O R
[ A B L E 1 - 1
S AND CONN
Function
Sets P R F range. In EXT
DRIVE, it changes prf
oscillator to a n aperiodic
input circuit.
Continuous Adjusts prf continuously
rotary control between calibrated switch
positions. When s e t fully
clockwise, P R F switch i s
calibrated. When P R F
switch i s s e t t o EXT DRIVE,
flF
control s e t s triggering
level of pulse generating
circuits.
PULSE DURATION Continuous S e t s pulse duration.
rotary d i a l
( n o s t o p )
S e t s pulse duration range
rotary switch in decade steps.
POWER O F F Toggle switch Turns instrument on and off.
OUTPUT PULSE
-
For negative main output
OUTPUT PULSE
+
Jack-top binding For positive main output
AMPLITUDE
Inner Control Continuous Adjusts amplitude
rotary control continuously between
switch positions.
Outer Switch 10-position S e t s pulse amplitude
rotary switch in ten s t e p s from zero
t o maximum.
EXT OFFSET Jack-top binding For connection t o an
post pair external power supply
1 0 SYNC DELAYED Jack-top binding For delayed sync pulse.
post pair Amount of delay is
controlled by PULSE
DURATION controls.
11 SYNC
-
J a c k-top binding For negative prepulse.
post pair
12 SYNC
+
Jack-top binding For positive prepulse.
post pair
1 3 EXT DRIVE Jack-top binding For external drive signal.
post pair
12-terminal For u s e with forthcoming
female connector
Type 1398-P1 DC Component
Control Unit.