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(4)
Tune
the
UUT
slowly
over
its
entire
frequency range from
5MHz
to
520MHz
and
verify that the mil
li
voltmeter reading does
not
change
by more
than
±ldB, and
the
UUT
meter by
more
than
±0.2dB.
In
the
range
1
.5
to
5MHz
(9082H
only) the mi
Ili
voltmeter reading
should not
change by more
than
±2.75dB and
the
UUT
meter by
more
than
±0
.
5dB
.
(5)
Set the
UUT OUTPUT
switch
to
'X2'.
(6)
Tune
the
UUT
to
50MHz
on
the appropriate
range
and
operate
the
VERNIER
control
for
a reading of
+3dB on
the
UUT
meter.
Verify
that the millivoltmeter
now
reads
+19dBm ±ldBm.
(7)
Repeat
operation
(4)
but
keeping
the
OUTPUT
switch at
'X2'
position
.
(8)
The
millivoltmeter should
now
read
+19dBm ±ldBm
and
the
UUT
meter
+3dB ±0.5dB
over the frequency range
5MHz
to
520
MHz.
In
the frequency range
1
.5MHz
to
5MHz
(9082H
only) the
millivoltmeter reading should not
change by more
than
±2.75dB
and
the
UUT
meter
by more
than
±ldB
.
(9)
Disconnect the
millivoltmeter.
DISTORTION
CHECK
5.42
Repeat
the
tests
detailed
in
paragraphs
5.17 and
5.18.
AM
DEPTH
AND
DISTORTION
CHECK
5.43
Repeat
the
tests
detailed
in
paragraphs
5.33 and 5.34
ATTENUATOR CHECK
5
.
44
Test
Equipment Required
Page 5-2 Table
5
Spectrum Analyser
Item
5
5.45
Procedure
(1)
On
the
UUT
set:-
Range
to
'256-512'
position.
OUTPUT
LEVEL
Control
to
the
0
dBm
position.
OUTPUT
switch
to
X2.
(2)
Connect
the
spectrum analyser
to
the
UUT
50Q
output socket
and
set
the analyser controls
as
follows:-
Centre Frequency
Input
attenuation
Bandwidth
Scanwidth
Video
filter
Scan
time
Log.
ref.
Vernier
500MHz
20dB
1
kHz
5kHz/div.
Off
10 msecs/div.
+10dB
-ldB
9081
&
9082 Vol
.
2
5-29
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