Sharp GX30 Service Manual - Page 40

Procedure], You can check each part in this state., GSM850 Band, DCS/PCS Band, GSM850

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GX30 GX30 TX power Table (25°C, voltage: 3.7[V]) GSM850 Band PCL GSM850 [dBm] 7 29 8 27 9 25 10 23 11 21 12 19 13 17 14 15 15 13 16 11 17 9 18 7 19 5 Tolerance +/-2 dB +/-3 dB +/-3 dB +/-3 dB +/-3 dB +/-3 dB +/-3 dB +/-3 dB +/-3 dB +/-5 dB +/-5 dB +/-5 dB +/-5 dB 3) RX test The handset receives burst signals in this test. CONFIDENTIAL GSM900 Band PCL GSM900 [dBm] 5 33 6 31 7 29 8 27 9 25 10 23 11 21 12 19 13 17 14 15 15 13 16 11 17 9 18 7 19 5 Tolerance +/-2 dB +/-3 dB +/-3 dB +/-3 dB +/-3 dB +/-3 dB +/-3 dB +/-3 dB +/-3 dB +/-3 dB +/-3 dB +/-5 dB +/-5 dB +/-5 dB +/-5 dB DCS/PCS Band PCL DCS/PCS [dBm] 0 30 1 28 2 26 3 24 4 22 5 20 6 18 7 16 8 14 9 12 10 10 11 8 12 6 13 4 14 2 15 0 Tolerance +/-2 dB +/-3 dB +/-3 dB +/-3 dB +/-3 dB +/-3 dB +/-3 dB +/-3 dB +/-3 dB +/-4 dB +/-4 dB +/-4 dB +/-4 dB +/-4 dB +/-5 dB +/-5 dB RX frequency of selected channels Current RX Gain (Read only) RX Gain Setting bar RX ON/OFF button Sniff ON/OFF This indicator appears while receiving burst signals. [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 start receiving 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 end receiving burst signals. Figure 64 * In this test, the reception timing cannot be synchronized with burst signals from Signal Generator or GSM tester. * The standard RX Gain Setting is: (Input power at the aerial connector of the handset) + (RX Gain) = -16 dBm Excessive Input power or RX Gain may cause damage to the handset. 2 - 32

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GX30
2 – 32
CONFIDENTIAL
GX30 TX power Table
(25
°
C, voltage: 3.7[V])
3) RX test
The handset receives burst signals in this test.
Figure 64
[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 start receiving 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 end receiving burst signals.
*
In this test, the reception timing cannot be synchronized with burst signals from Signal Generator or GSM tester.
*
The standard RX Gain Setting is:
(Input power at the aerial connector of the handset) + (RX Gain) = –16 dBm
Excessive Input power or RX Gain may cause damage to the handset.
GSM850 Band
GSM900 Band
DCS/PCS Band
PCL
GSM850
Tolerance
PCL
GSM900
Tolerance
PCL
DCS/PCS
Tolerance
[dBm]
[dBm]
[dBm]
7
29
+/–2 dB
5
33
+/–2 dB
0
30
+/–2 dB
8
27
+/–3 dB
6
31
+/–3 dB
1
28
+/–3 dB
9
25
+/–3 dB
7
29
+/–3 dB
2
26
+/–3 dB
10
23
+/–3 dB
8
27
+/–3 dB
3
24
+/–3 dB
11
21
+/–3 dB
9
25
+/–3 dB
4
22
+/–3 dB
12
19
+/–3 dB
10
23
+/–3 dB
5
20
+/–3 dB
13
17
+/–3 dB
11
21
+/–3 dB
6
18
+/–3 dB
14
15
+/–3 dB
12
19
+/–3 dB
7
16
+/–3 dB
15
13
+/–3 dB
13
17
+/–3 dB
8
14
+/–3 dB
16
11
+/–5 dB
14
15
+/–3 dB
9
12
+/–4 dB
17
9
+/–5 dB
15
13
+/–3 dB
10
10
+/–4 dB
18
7
+/–5 dB
16
11
+/–5 dB
11
8
+/–4 dB
19
5
+/–5 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 while
receiving burst signals.
Sniff ON/OFF