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S:\Hp8960\E1960A GSM Mobile Test Application\A.04 Release\Reference_Manual\Chapters\meas_rach_desc.fm
RACH Measurement Description
Overview of Measurement Procedure in Test Mode
1. Set operating mode to Test.
2. Set the test function to either BCH, or, BCH + TCH.
3. Set the Broadcast Channel to the channel you wish to use.
4. Using your proprietary commands, initiate the mobile to generate a sequence of RACH bursts on the BCH.
5. Start the appropriate measurement.
Example Procedure
The following procedure details how to make a power versus time RACH measurement manually while in
Active Cell mode.
1. Press
SHIFT
PRESET
. The “Call Setup Screen” is displayed.
2. Press the
More
key which is positioned immediately below
F12
two times. This displays screen 3 of 4.
3. Press
F7
and set the
Receiver Control
to
Manual
.
4. Press
F9
and change the
Manual Channel
from 30 to 20. (This sets it to the same channel as the Broadcast
Chan on screen 1 of 4.)
5. Press
Measurement selection
. (This key is positioned below the display.)
6. Select
Power vs Time
.
7. Press
F1
,
Power vs Time Setup
.
8. Press
F1
,
Measurement Setup
.
9. Set
Trigger Arm
to
Single
.
10.Press
START SINGLE
on the front panel of the test set. (Note, you are starting the measurement before
originating a call. This is to ensure that it is the RACH burst that is measured.)
11.Connect the mobile, then originate a call from the mobile.
12.Immediately you press send on the mobile the power versus time measurement result is displayed. You can
confirm that the measurement has occurred on the RACH by examining the measurement results. With a
RACH measurement, since the burst is shorter than normal, the power drops of rapidly after 331
µ
s. To
examine the results select
F6
,
Return to PvT Control
,
F2
,
Change View
, then select
F2
,
Numeric 1 of
2
and
F3
,
Numeric 2 of 2
.
13.To do further measurements on the TCH ensure that the Receiver Control is returned to Auto.
Related Topics
*******************************************************
“Programming a RACH Measurement” on page 99
“RACH Troubleshooting” on page 102
*******************************************************
Summary of Contents for 8960 Series 10
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