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TABLE
6.7
Input
C
Sensitivity
Frequency
Counter
Resolution
Signal
Level
40
MHz
8 digits
10
mV
100
MHz
8
digits
10
mV
500
MHz
8 digits
10
mV
1.0
GHz
9 digits
10
mV
1.3
GHz
9 digits
50
mV
(4)
For each
selected frequency,
determine
the
minimum
input
level to
the
counter
that provides
stable counting.
Verify that these
minimum
levels
do
not
exceed
those
shown
in
the
table.
(5)
Disconnect
the
test
equipment.
External Standard
Input Sensitivity
PVP
51
Required equipment
includes a signal
generator
(see
Table
6.1;
Item
4).
52
Complete
the following
procedure:
(1)
Connect
the
signal
generator output
to
the
EXT. STD.
INPUT
socket on the
rear
panel
of the counter.
'
(2)
Set the
signal
generator output
to
10
MHz
at a level of 10
mV.
(3)
Slowly increase the
signal
level
until
the counter's
EXT
STD LED
lights
steadily.
(4)
Verify that the
signal level
does not
exceed
70
mV
r.m.s.
(5)
Disconnect
the
signal
generator.
10
MHz
Standard Output Level
PVP
53
Required
test
equipment
includes an
oscilloscope,
BNC
T
-Connector, and
coaxial
load
(see
Table
6.1;
Items
2,
7,
and
9).
54
Complete
the following procedure:
(1)
Connect
the
test
equipment
as
shown
in
Fig. 6.12.
6-30
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