Wavetek 3000 Instruction Manual page 224

MANUAL CHANGES - MODEL 3000 (Cont'd)
Section 5, Figure 5-6 . Model 3000 Top View :
Item (16) is shown as the 50130-01 STEP ATTEN ; Relabel this item the
"Programmable Attenuator" . (The new attenuator is smaller than the
one shown but occupies the same relative position .)
Section 7, Model 3000 Wiring Diagram :
The block identified as "STEP ATTENUATOR
50130-1" should be
relabeled "PROG ATTENUATOR AT01" .
Meter Board, C315, Schematic :
Microswitch S1, shown as a block on this figure,
has been
incorporated into the programmable attenuator switch .
Section 8, OPTION IB :
Figure 8/1B-2 : The block identified as "50130--Ol ATTEN" should be
relabeled -"PROG ATTEN ATOI" .
Figure 8/IB- .3 :
The comments about Figure 5-6, above, (Model 3000
Top View) apply here also .
Section 8, OPTION 3 :
Figure 8/3--2 :
The block labeled "STEP ATTENUATOR 50130--1" (below
the figure) should be relabeled "PROGRAMMABLE ATTENUATOR" .
Rev E M31A to M31B
3/27/87
PIN 3783 The M31A is now obsolete .
This module has been replaced with the
M31B . Replace all text references to the "M31A" with "M31B" .
On the M31A schematic (Wavetek number 0014-40-0061)
change IC7 from
74HI02 to 74LS112, IC8 from 74H11 to 74LS11, and ICIOA and IOB from
4558 to TL082 . Add a 100 9 resistor
(R32) between pin 4 of IC10B
and the -18 volt supply . Add a 100 S2 resistor (R31) between pin 8
of ICIOA and the +18 volt supply .
On the parts list titled PC Assy, M31A, assembly number 1114-00--143,
make the following corrections :
1 .
Replace the line beginning "IC07" with the following line :
"IC07 ; DUAL J-K NEG ; SN74LS112AN ; T-I ; 8007-41-1210 ; 1"
2 .
Replace the line beginning "IC08" with the following line :
"IC08 ; TRIPLE POS AND ; SN'74LS11N ; T-I ; 8000--74-1110 ; 1"
3 .
Replace the line beginning with "IC10" with the following line :
"IC10 ; DUAL OP AMP ; TLO82CP ; T-I ; 7000--00---8200 ; 1"
4 . Add the following line :
"R31 R32 ; RES, C, 1/4W, 5%, 100 ; CF 1/4-100 ; ASE ; 4700-15-1000 ;
2"