Filter
Top Products
FM Receivers
107
On the Test Set using the knob and data entry keys:
15 Set AFGen1 To 20% of the Receiver’s maximum frequency deviation
(1 kHz for Receivers with specified maximum frequency deviation of
5 kHz).
16 Select AC Level.
17 Press the REF SET key.
18 Change AFGen1 Freq from 300 Hz to 3 kHz while observing AC Level
Meter.
Frequency Response is displayed on the screen as AC Level in relative dB
(from 300Hz to 3 kHz) as shown.
NOTE: The audio response should not vary more than +2 to −8 dB (Receiver’s with
loudspeakers) or +1 to −3 dB (Receivers with headphones or feed-line) from
a standard 6 dB per octave de-emphasis curve over the frequency range of
300 to 3000 Hz.
Audio Fre-
quency
Response
To Screen
RX TEST
AC Level
Filter 1
<20Hz HPF
Filter 2
15kHz HPF
Atten Hold
On/Off
Ext Load R
8.00
Ω
RF GEN
RF ANL
AF ANL
SCOPE
SPEC ANL
ENCODER
DECODER
RADIO INT
More
dB
dB
-7.61
SINAD
RF Gen Freq
145.280000
MHz
Amplitude
-47.0
uV
Output Port
RF Out/Dupl
AFGen1 Freq
3.0000
kHz
AFGen2 Freq
1.0000
kHz
AFGen2 To
Off
FM
00.07 24
Ref
AFGen1 To
1.00
kHz
FM