SA-157
RF coupler
SA-157 is an RF coupler for WCDMA and GSM RF testing. It is used
together with the product-specific flash adapter.
The following table shows attenuations from the antenna pads of the
mobile terminal to the SMA connectors of SA-157 . The setup used for
measuring the values is SA-157 + FS-97 + SS-62 + CU-4.
•
Attenuation values for inductive RF coupler SA-157
Band
Channel
Attenuation RX
(dB)
Attenuation TX
(dB)
GSM 850
Low
7.7
11.4
Mid
7.8
10.5
High
6.5
8.8
GSM 900
Low
5.7
7.3
Mid
6.7
7.4
High
5.8
6.7
GSM
1800
Low
13.9
15.0
Mid
12.8
14.1
High
15.7
12.8
GSM
1900
Low
13.3
13.6
Mid
13.5
14.1
High
14.0
13.2
WCDMA
Band I
Low
17.1
12.8
Mid
18.0
13.3
High
18.2
12.6
WCDMA
Band II
Low
13.6
12.9
Mid
13.0
13.4
High
14.4
13.1
WCDMA
Band VIII
Low
6.3
8.0
Mid
7.1
7.5
High
6.5
6.9
Using SA-131 GPS RF coupler with RM-424
Use the following basic SA-131 setup for RM-424:
•
1575.520152 MHz
•
-110dbm
•
20db fixed RF attenuator
RM-424; RM-564
Service Tools and Service Concepts
Page 2 –6
COMPANY CONFIDENTIAL
Issue 1
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