Sharp GX15, Service Manual

Page: 39 / 122

GX15
2 – 31
CONFIDENTIAL
GX15 TX power Table (25
°
C, voltage: 3.7[V])
3) RX test
The handset (phone) receives burst signals in this test.
Figure 59
[Procedure]
1. Select a channel and band. [see 4.6.3.1) ]
2. Select RX Gain using RX Gain Setting bar.
3. Choose Sniff ON or OFF.
4. Click “RX ON” to receive burst signals.
5. From GSM tester, send burst signals in the specified channel.
(You can check each part in this state.)
6. Click “RX OFF” to stop burst signals.
* In this test, the reception timing cannot be synchronised with burst signals from Signal Generator or GSM tester.
* The standard RX Gain Setting is:
(Input power at the aerial connector of the handset (phone)) + (RX Gain) = –16 dBm
Excessive input power or RX Gain may cause damage to the handset (phone).
GSM Band DCS/PCS Band
PCL GSM Tolerance PCL DCS/PCS Tolerance
[dBm] [dBm]
5 33 +/–2 dB 0 30 +/–2 dB
6 31 +/–3 dB 1 28 +/–3 dB
7 29 +/–3 dB 2 26 +/–3 dB
8 27 +/–3 dB 3 24 +/–3 dB
9 25 +/–3 dB 4 22 +/–3 dB
10 23 +/–3 dB 5 20 +/–3 dB
11 21 +/–3 dB 6 18 +/–3 dB
12 19 +/–3 dB 7 16 +/–3 dB
13 17 +/–3 dB 8 14 +/–3 dB
14 15 +/–3 dB 9 12 +/–4 dB
15 13 +/–3 dB 10 10 +/–4 dB
16 11 +/–5 dB 11 8 +/–4 dB
17 9 +/–5 dB 12 6 +/–4 dB
18 7 +/–5 dB 13 4 +/–4 dB
19 5 +/–5 dB 14 2 +/–5 dB
15 0 +/–5 dB
RX Gain Setting bar
RX frequency of selected channels
Current RX Gain (Read only)
RX ON/OFF button
This indicator appears whilst
receiving burst signals.
Sniff ON/OFF