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Service
On
Off
On
45.N AM and FM Calibrator and RF Power Reference Control.
Calibrator), 29
(FM
Calibrator), and 3 (RF Power Reference).
Off
On
On
-
N
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
-
-
On
Off
On
Off
On
On
FM
Calibrator
Frequency
Low
Low
Low
Low
Low
Low
High
High
High
High
High
Switching
Switching
Switching
Switching
Switching
Low
Low
Low
Low
Low
Low
High
High
High
High
High
Switching
Switching
Switching
Switching
Switching
Off
On
Off
On
Model 8901B
See Service Sheets 30 (AM
Off
Off
On
On
RF
Power
Reference
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
On
Off
On
46.N Count Internal Signals.
The Counter counts the internal signal selected by N for 100 ms and
displays the count. This is equivalent to measuring the frequency of the signal with 10
H z
resolution
for most signals. See Service Sheets 22 and 23.
N=l
N=2
Intermediate Frequency. See Service Sheet 10.
Voltage-to-Time Converter. 10 000 counts equal lV, but includes a 0.6V offset. See Service
Sheet 15 or Special Functions 49 and 50.
FM
Calibrator. See Service Sheet 29.
High Frequency VCO Divided by
8.
This
is
the
40
to 80 MHz signal proportional to the LO
frequency. See Service Sheet 17.
Selected Time Base Reference. The display should read
100000011.
See Service Sheet 22.
External Time Base Reference. The display should read
l O O O O O O f l
when an external
reference is connected. See Service Sheet 22.
N=3
N=4
N=8
N=9
Off
On
On
8B-6
Special Functions
On
Off
On
Off
On
On
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