HP Cell Phone Accessories 8935 Benutzerhandbuch
Chapter 2
47
Testing AMPS Base Stations
Receiver Squelch Threshold
Cha
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te
r 2
Test
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AM
PS Base St
a
tions
13.Set an initial RF generator level in the
Amplitude
field. This value
depends on the sensitivity of the receiver; but
−
90 dBm should be a
good starting point. At this point you should be able to turn the Test
Set’s Volume knob clockwise and hear a 1 kHz tone from the Test
Set’s speaker.
Set’s Volume knob clockwise and hear a 1 kHz tone from the Test
Set’s speaker.
14.Set the
Amplitude
field to increment in 1 dB units. To do this,
position the cursor in front of the
Amplitude
field, press the
Incr Set
key, and enter 1 dB using the keypad.
15.With the cursor in front of the
Amplitude
field, turn the knob
counterclockwise to decrease the
Amplitude
setting until the
received audio is no longer heard on the Test Set’s speaker (or until
the
the
AC Level
reading drops suddenly). The RF amplitude at which
the audio signal is no longer output is the squelch threshold.
Turn on FM
modulation
for the RF
generator
and set to
8 kHz.
modulation
for the RF
generator
and set to
8 kHz.
Set a initial
level of
level of
−
90 dBm.
Enter the
RF channel
number.
RF channel
number.
Set to On.
On/off
8.00
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