17/Jxs-2 Example Figures; Setting Cable Loss For Auto-Tuning - Nokia RH-47 Series Rf Description And Troubleshooting

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• RX RSSI level on LOW channel (GSM850, GSM1900)
• RX RSSI level on MID channel (GSM850, GSM1900)
• RX RSSI level on HIGH channel (GSM850, GSM1900)
The cable attenuation values (incl. power splitter when used) must be taken into account
in the measurement process. However, disregard the attenuation of the "black box"
because this is the value to be determined.
DA-17/JXS-2 example figures
After the measurement in the "black box", the following parameters are determined (typ-
ical values listed below).
P a r a m e t e r P a r a m e t e r
D A 1 7 _ T X _ 8 5 0 D A 1 7 _ T X _ 8 5 0
D A 1 7 _ T X _ 1 9 0 0 D A 1 7 _ T X _ 1 9 0 0
D A 1 7 _ R X _ 8 5 0 _ L O W D A 1 7 _ R X _ 8 5 0 _ L O W
D A 1 7 _ R X _ 8 5 0 _ M I D D A 1 7 _ R X _ 8 5 0 _ M I D
D A 1 7 _ R X _ 8 5 0 _ H I G H D A 1 7 _ R X _ 8 5 0 _ H I G H
D A 1 7 _ R X _ 1 9 0 0 _ L O W D A 1 7 _ R X _ 1 9 0 0 _ L O W
D A 1 7 _ R X _ 1 9 0 0 _ M I D D A 1 7 _ R X _ 1 9 0 0 _ M I D
D A 1 7 _ R X _ 1 9 0 0 _ H I G H D A 1 7 _ R X _ 1 9 0 0 _ H I G H
The calibration factor needed for the RF autotuning in DA-17/JXS-2 is calculated by sub-
tracting the DA-17 value from the MJ-21 value. This must be done for each of the eight
values.

Setting cable loss for Auto-Tuning

Phoenix allows you to set separate loss values at different frequencies for cables and the
jig.
Procedure:
1 From the Tuning menu, choose Set Loss.
2 Enter the cable losses (incl. Power splitter if used) for GSM850 at 824 and 894
MHz and for GSM1900 at 1850 and 1990 MHz.
Issue 1 05/04
Company Confidential
7 - RF Description and Troubleshooting
Copyright © 2004 Nokia Corporation
Company Confidential
E x a m p l e v a l u e E x a m p l e v a l u e
2 4 . 5 d B m 2 4 . 5 d B m
2 2 . 5 d B m 2 2 . 5 d B m
- 7 0 . 5 d B m - 7 0 . 5 d B m
- 6 9 . 5 d B m - 6 9 . 5 d B m
- 6 9 . 6 d B m - 6 9 . 6 d B m
- 6 8 - 6 8 d B m d B m
- 6 8 - 6 8 d B m d B m
- 6 8 . 3 d B m - 6 8 . 3 d B m
RH-47
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