Wavetek 3000 Instruction Manual page 222

MANUAL CHANGES - MODEL 3000
Wavetek's
product improvement
program incorporates the latest electronic
developments into these instruments as rapidly as development
and testing
permit . Due to the time required to document and print
these instruction
manuals, it is not always possible to include the changes in the original
printing. The following schematics and drawings have been changed .
DPS2A has replaced DPS2 ; M10W-9 has replaced M10W ; M29--2 has replaced M29-1 ;
M31A has replaced M31 ; M32A has replaced M32 ; M41A-1 has replaced M41A . In all
cases where the former assembly is mentioned in the manual text, the new
assembly name should be understood . All specifications, adjustments,
and
procedures, have been updated in the manual text .
GENERAL Two gaskets are being installed under the M9W and MlOW-9 modules to
further reduce RFI radiation . The hold-down screws for these modules
are 3/8" instead of 5/16" as for the other modules .
The gasket
material consists of nickel fibers imbedded in a silicone elastomer .
Loose fibers may penetrate the skin or short out a chassis terminal ;
therefore use care when handling the gasket .
M35-1 R15 is now 1 .8 kohm, W-I PN 4700-15-1801 .
M41A-1 C17 is reversed on the schematic .
Rev A M34
11/15/84 M34 Schematic should indicate C13* .
Rev B M9W to M9W-7
11/14/85 The M9W-7 Sweep Oscillator module replaces the M9W module in the
Model 3000 Signal Generators . The M9W-7 module uses a control
circuit to automatically set the phased-locked loop voltage in PLL3
to zero . This eliminates the Pot "D" adjustment in the M9W module .
Disregard the first paragraph of Section 5 .3 .7 in the manual, since
there is no pot "D" . The M9W-7 parts list and schematic replace the
M9W documents may be found at the end of the Manual Changes .
Rev C 5 .3 .6 PHASE-LOCKED LOOP 2 ADJUSTMENT M32A
1/7/86 Revise the first paragraph beginning with line 3 to read :
Connect a digital voltmeter to M32A PIN 14 . The DVM should read
between +0 .5 and +2 .5 VDC . If the leveler voltage is within this
range, DO NOT adjust the M30-4t trimmer capacitors . (The dash number
# depends upon the instrument model number .)
If the leveler voltage is not between +0 .5 and +2 .5 VDC, carefully
adjust trimmers A and B on top of the M30-# until the voltage is
correct .