Receive Performance Check
: Tone Sensitivity
3-3
3.2.1
HP8920 Encoder
Set HP8920 Encoder as below:
• SIGNALING ENCODER (AF GENERATOR 2)
• Symbol Sequence:12
• Symbol
• Definition
NOTE:
Symbol sequence: sequence of two tones of QC2.
On Time: transmission time of tone
Freq: Tone frequency.
Above setting means that HP8920 transmits 288.5 Hz for 1 second and 2468.2 Hz for 3 seconds in
a row.
3.2.2
HP8920 RX Test Window
Go to HP8920 RX test window:
• RX TEST
1. Set RF Gen Freq as pager RX frequency.
2. Set AF Gen2 TO 1.5 kHz for 12.5 kHz Channel Spacing, 3 kHz for 25 kHz Channel Spacing.
3. Push ‘Send’ in AFGen2 Freq to send QC2 tones to pager.
4. If pager decoded QC2 signal, it will sound an Alert tone.
Table 3-1. Initial Equipment Control Settings
Seq. Num. ON Time (ms)
OFF Time (ms)
Sym
Freq. (Hz)
Amptd (%)
1
1000
0.0
0
0.0
100.0
2
3000
0.0
1
288.5
100.0
3
33.0
0.0
2
2468.2
100.0
RF Gen Freq.
476.025 MHz
AFGen1 Freq.
1.000 kHz
AFGen2 Freq.
Send:
Stop: Hz
Filter 1
50Hz HPF
Amplitude
-107 dBm
AFGen1 To FM
Off kHz
AFGen2 To FM
1.5 kHz
Filter 2
15 kHz LPF
Atten Hold
ON/ OFF
Ext Load R
8.00
Ω
Output Port
RF Out/ Dupl
