Tektronix 2A60 Instrument Reference Book page 67

INSTRUCTIONS (cont)
G, TO MODIFY TYPE 3B4:
IMPORTANT: Select the proper steps below, plus the portion of Fig. 9 which
applies, to connect either the EXT HORIZ IN or EXT TRIG IN
connector to the rear panel.
1. EXT HORIZ IN or EXT TRIG IN:
( ) a) Drill a 5 /32 in. hole in the chassis, slightly above and to the rear of V24.
CAUTION: Look out for the wiring cable on the other side of the chassis.
( ) b) Drill a 5/32in. hole in the chassis, between Vl61 and Vl73.
( ) c) In each of the holes drilled above, mount a 2-hole support post (rod) from the
kit. Use 6-32 x 5/16 PHS screws from the kit.
2. EXT HORIZ IN:
( ) a) Dress the coax cable (from
J
-1) through the 'top' holes in the support posts.
( ) b) Solder the coax center conductor to the EXT HORIZ IN connector and the shield
to the ground lug.
3. EXT TRIG IN:
( ) a) Dress the coax cable (from
J
-2) through the 'bottom' holes in the support posts.
( ) b) Solder the coax center conductor
to
the EXT TRIG IN connector and the shield to
the ground lug.
THIS COl\.1PLETES THE INSTALLATION FOR THE TYPE 3B4.
( ) Fasten the insert page in your Instruction Manual.
CH:cet
040-0406-00
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