Last updated: December 2, 2008
This section is only applicable to the lab applications.
The following procedures assume the BCH Parameters for the Cell Band are set up correctly for your mobile station and the appropriate RF IN/OUT Amplitude Offsets have been set to the offset loss between the mobile station and the test set.
This section details the manual operation procedures for:
The CA Table lists all the channels available to the cell. The entries in the CA Table are important because the MA Tables can only use channels that are in the CA Table. The following procedure details how to change the CA Table.
Operating Mode
(
F1
) and choose
Cell Off
from the menu.
Cell Info
(
F6
)
Cell Lists
(
F4
).
Press
CA Table
(
F2
). The
CA Table
menu that appears should look similar to the figure below.
Note: The entries in the CA Table below contains the test set's default values.
Operating Mode
must be
Cell Off
in order to change any values in the
CA Table
. If the
Operating Mode
is not
Cell Off
all the entries in the
CA Table
will be gray.
Operating Mode
(
F1
) and select
Active Cell
(
GSM, GPRS, or EGPRS
) or
GSM BCH+TCH
TCH Parameters
(
F8
)
2 of 2
is displayed.
Frequency Hopping
(
F11
).
Freq Hopping
(
F7
) and turn the state to
On
.
HSN
(
F8
) and choose a Hopping Sequence Number.
Press
MA Table
(
F9
). A menu similar to the figure below appears that shows all the ARFCNs that are currently in the
MA Table
for the selected band. The figure below is the default
MA Table
for the PCS band.
To change the state of any ARFCN, you must first set the
MA Table Configuration
to
Manual.
Notice when the
MA Table Configuration
is set to
Manual
all of the table entries change from gray to black.
To change the values that are in the
MA Table
, you must change the Cell Allocation (CA) Table first by adding/changing ARFCNs for the desired band. See
Changing the Cell Allocation (CA) Table
for the manual operation procedure for changing the
CA Table
.
Meas ARFCN
(
F11
) to set the Measurement ARFCN. Use the knob to scroll through the choices for the Measurement ARFCN.
Spectrum Monitor
that is incorporated into the test set is a useful instrument for this purpose. See
Viewing Frequency Hopping with the Spectrum Monitor
for an example of how you might view frequency hopping. Note: The
Traffic Channel
(
F9
) field under the
TCH Parms
menu disappears from the front panel when frequency hopping is enabled.
Operating Mode
(
F1
) and select
Active Cell
(
GPRS
) or
GPRS BCH+PDTCH
.
PDTCH Parameters
(
F9
)
Spectrum Monitor
that is incorporated into the test set is a useful instrument for this purpose. See
Viewing Frequency Hopping with the Spectrum Monitor
for an example of how you might view frequency hopping.
Operating Mode
(
F1
) and select
Active Cell
(
EGPRS
) or
EGPRS BCH+PDTCH
.
PDTCH Parameters
(
F9
)
Spectrum Monitor
that is incorporated into the test set is a useful instrument for this purpose. See
Viewing Frequency Hopping with the Spectrum Monitor
for an example of how you might view frequency hopping. This procedure assumes that the BCH parameter for Cell Band is set up correctly for your mobile station and that the appropriate RF IN/OUT Amplitude Offsets have been set to offset loss between the mobile station and the test set.
Protocol
from the Trigger Source list.Press Trigger Arm (F3) to Continuous. You should see a screen similar to the figure below. The frequency should appear to be hopping as it changes in a cyclic or random way, depending on the setting for the HSN. The figure below is a plot of power vs. time when frequency hopping is enabled and the Measurement ARFCNs are 1 and 10 for the PGSM band.
The figure below is a plot of power vs. time when frequency hopping is off and when the Measurement ARFCNs are 1 and 10 for the PGSM band.