Agilent Technologies HP8648A Weather Radio User Manual


 
AM Receivers
142
On the Radio set the Receiver’s Controls as follows:
9. Set power to ON.
10. If required, set frequency to the same value as step 4.
11. Set squelch to minimum.
12. Set RF Gain to maximum (if equipped).
13. Set the volume control until the AC Level reads 100% of the Receiver’s
specified audio output.
Refer to the audio output specifications for the receiver being tested.
On the Test Set using the knob and data entry keys:
14. Decrease Amplitude until the SINAD meter reads 10 dB.
Sensitivity (10dB SINAD) is displayed as Amplitude as shown.
If desired, use the meter averaging function for the SINAD indicator.
a. Select dB on the SINAD meter.
b. Press the AVG key.
If desired, select the number of readings to average.
Enter the number of readings to average.
Higher number of readings averaged will require longer to
reach the final indication.
Sensitivity
To Screen
RX TEST
AC Level
Filter 1
50Hz HPF
Filter 2
15kHz HPF
Atten Hold
On/Off
Ext Load R
8.00
RF GEN
RF ANL
AF ANL
SCOPE
SPEC ANL
ENCODER
DECODER
RADIO INT
More
W
dB
0.004040
SINAD
RF Gen Freq
28.310000
MHz
Amplitude
.707
uV
Output Port
RF Out/Dupl
AFGen1 Freq
1.0000
kHz
AFGen1 To
30.0
%
AM
AFGen2 Freq
1.0000
kHz
AFGen2 To
Off
FM
010.05
Avg
24