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FM FREQUENCY
RESPONSE
CHECK
5.35
Test
Equipment
Required
Modulation Meter
(TF2300)
Millivoltmeter
Audio
Signal
Generator
5.36
Procedure
Page 5-2 Table
5
Item
4
Item
8
Item
9
(1)
Set the
UUT
controls as
in
5.32
(1).
(2)
Connect
the
audio generator
to
the
FM/0M
EXT
600£T socket with
the millivoltmeter
as
monitor.
Set the
audio frequency
to
1kHz.
(3)
Connect
the
modulation meter (TF2300)
to
the
UUT 50Q
output
socket.
(4)
Tune
the
UUT
to
520MHz.
(5)
Refer
to
Table
14.
Apply
the
audio
frequencies at
1
.00
V
r.m.s.,
and
adjust the
front
panel
FM/0M
COARSE
control
to
give
a
100
kHz
peak
deviation reading
on
the
UUT
meter.
Verify
the
corresponding
peak
deviation readings
on
the
modulation meter.
TABLE
14
FM
Frequency
Response
Check
Audio
freq.
Millivoltmeter
reading
Modulation
meter reading
20Hz
1.00V
100k
Hz
±30 kHz
100Hz
1.00
V
100kHz
±
10kHz
10k
Hz
1.00
V
100kHz
±
5kHz
100kHz
1,00
V
100k
Hz
± 30k Hz
9081
&
9082 Vol.2.
5-26
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