Wavetek 171 - Page 19

Table
5-1.
Calibration
Chart
(Continued)
Step
Check
Tester
Cal
Points
Control
Settings
Adjust
Desired
Results
Remarks
5
Distortion
Distortion
ana-
lyzer
(50S2 termi-
nated
50Q OUT Function
'Y.
R72
R93
Minimum
distortion
6
VCG
null
Scope
FREQMULT
: X
100K
Function:
T.
Dial: full
cw
Scope
vert:
2V/div
Scope horiz: .5
ms/div
R40
Minimum
frequency
shift
Adjust generator dial
to
display one cycle
on scope. Alternately
short
and
open VCG
IN BNC while adjust-
ing R40.
7
Horizontal
symmetry
Scope
Horiz:
X 10
on
R42
Maximum
symme-
try
Alternately
switch
scope
triggering from
positive to negative
slope
while adjusting
R42.
8
Dial: 01
FREQMULT: X 10
Scope
sweep:
O.ls/div,
dc
triggering
R60
9
Frequency
accuracy
Counter
Dial: 2.0
FREQMULT:
X 1
thru X
10K
R32
Best
frequency ac-
curacy
over
X
1
thru X
10K
10
FREQMULT: X
1M
Function: 1_i
Dial: 2.0
C37 2.020
MHz
11
Function:
T,
,
\
Best
frequency
tracking
on
X
1M
range
12
Internal
reference
REF OUT Mode
toggle switch:
towards
digital
switch
Cl 1
MHz
±20 Hz
Cl is on
synthesizer
board.
13
F/V bal-
ance
Scope
or DVM
TP5
(TP1
common)
FREQMULT: X
10K
Digital
Switch: 0.1000
R31
0+0.1
Vdc
14 F/V gain
Digital
Switch: 0.9999
R28
+1
Vdc
approx
15
Digital
Switch: 1.9999
—1
Vdc
approx
If necessary, reset
R28 for best
balance
between
0.9999 and
1.9999.
16
Frequency
range
Counter
5
on OUT
FREQMULT: X
1M
thru
X 10
Function: 1_i
Reading
±0.005%
each
setting
5-2