HP 8340b - Page 127

Table
B-l.
M
and
N
Divide
Numbers
and
Voltage
Levels^
M
Divide
Number
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
1
A 0
entry
corresponds
to
<
0.5V.
A 1
entry corresponds
to
>
3.0V.
Ml
M2
M3
M4 M5
00010
10010
01010
11010
00110
10110
01110
11110
00001
10001
01001
11001
00101
10101
01101
11101
00011
10011
01011
11011
N
Divide
Number
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
N1
N2
N3
N4
N5
N6
101100
011100
111100
00001
0
100010
010010
110010
001010
101010
011010
111010
000110
100110
010110
110110
001110
101110
011110
111110
000001
100001
010001
110001
001001
NOTE:
To
accurately
measure
the
frequency
at
A31TP1
and
A31TP2
in
steps
14
and
17,
the
mea¬
surement
should be
made
with
a
spectrum
analyzer
and
an
active
probe.
14.
Install
the
A31
assembly
on
the
extender
board and
press
[CW]
[4]
[5] [3] [0]
[MHz].
Connect
Channel
1
of
an oscilloscope
to
A31TP1
and
set
the
scope as
follows:
100
ns/div,
200
mV/div,
and
DC
coupled.
The
waveform
displayed
on
the
scope
should
be similar
to the
one
shown
in
Figure
B-13.
The
frequency
at
the
test point
should
be
3.333333
MHz.
If
the
signal
at
A31TP1 is
incorrect,
replace A31.
HP 8340B/41B
M/N Loop Assembly-Level
Troubleshooting
B-25/B-26