Wavetek 171 - Page 19

Table
5-1.
Calibration
Chart
(Continued)
Cal
Control
Desired
Step
Check
Tester Points Settings
Adjust
Results
Remarks
5
Distortion
Distortion ana-
500
OUT
Function
'\,
R72
Minimum distortion
lyzer
(500
termi-
R93
nated
6
VCG null
Scope
FREQMULT:
X
100K R40
Minimum frequency
Adjust generator dial
Function:~
shift
to
display one
cycle
Dial:
full
cw
on scope. Alternately
Scope
vert: 2V /div
short
and open
VCG
Scope horiz:
.5ms/div
IN
BNC
while adjust-
ing R40.
7
Horizontal Scope Horiz:
X
10
on
R42
Maximum symme-
Alternately switch
symmetry
try
scope triggering from
positive
to
negative
slope while adjusting
R42.
-
8
Dial:
01
R60
FREQ
MUL
T:
X
10
Scope sweep: 0.1s/div,
de triggering
9
Frequency
Counter
Dial:
2.0
R32
Best frequency
ac-
accuracy
FREQ
MUL
T:
X
1 curacy over
X
1
thru
X
10K
thru
X
10K
-
10
FREQ
MULT:
X
1M
C37
2.020
MHz
Function:
Li
Dial:
2.0
-
11
Function:
Li,
~."v
Best frequency
tracking on
X
1 M
range
12 Internal
REF
OUT Mode toggle switch:
Cl
1
MHz
±20
Hz
C
1
is
on synthesizer
reference towards digital switch
board.
13
FNbal-
Scope
or
DVM
TP5 (TP1
FREQ
MULT:
X
10K
R31
0
±0.1
Vdc
ance
common)
Digital Switch:
0.1000
14
FN
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
Counter
500
OUT
FREQ
MULT:
X
1M
Reading
±0.005%
range
thru
X
10
each setting
Function:
Li
5-2