Agilent Technologies Agilent 8648A Weather Radio User Manual


 
AM Receivers
148
On the Test Set using the knob and data entry keys:
15. Slowly increase the Amplitude until squelch just remains open.
Critical Squelch is displayed as Amplitude as shown.
Record this level.
16. Decrease Amplitude until the Receiver’s squelch just closes.
Record this level.
Calculate the measurement:
17. Critical Squelch Hysteresis is the difference between the two readings.
On the Radio set the Receiver’s Controls as follows:
18. Set the Receiver’s squelch control to maximum.
On the Test Set using the knob and data entry keys:
19. Increase Amplitude until the Receiver’s squelch just opens.
Record this level.
20. Record the maximum squelch sensitivity is displayed as Amplitude as
shown.
21. Decrease Amplitude until the Receiver’s squelch just closes.
Record this level.
Calculate the reading:
22. Maximum Squelch Hysteresis is the difference between the two readings.
Squelch
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
V
dB
0.7878
SINAD
RF Gen Freq
28.310000
MHz
Amplitude
1.58
uV
Output Port
RF Out/Dupl
AFGen1 Freq
1.0000
kHz
AFGen2 Freq
1.0000
kHz
AFGen2 To
Off
FM
0 20.44 24
AFGen1 To
30.0
%
AM