HP/Agilent 8922 Single-Slot Data Test
System
Option #K18
Supplementary User’s Guide
Manufacturing Part Number: 08922-90222
October 1998
© Copyright 1998
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2
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3
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4
Contents
1. Single-Slot Data Testing
2. Enabling the HP/Agilent 8922 for Single-Slot Data Testing
Checking the prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Checking the package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Checking the HP/Agilent 8922 firmware version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Enabling the Single-Slot Data functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3. Performing Single-Slot Data Testing
Setting up the Single-Slot data test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Manual operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Performing the test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Remote operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
GPIB commands for Single-Slot Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5
Contents
6
1 Single-Slot Data Testing
This chapter briefly describes how the HP/Agilent 8922 performs
Single-Slot data testing.
7
Single-Slot Data Testing
Test overview The HP/Agilent 8922 option K18 allows Single-Slot data products to be
tested in production. The test performed verifies the complete data path
(transmit and receive) through a mobile station containing an
integrated modem and ensures the integrity of the data path within the
Device Under Test (DUT).
Note that the Single-Slot data test performed by the HP/Agilent 8922 is
a functional test and all existing functionality within the HP/Agilent
8922 is maintained with all parametric testing of the DUT (such as, TX
Power Level, Phase & Frequency etc.) being performed in normal
Speech mode. While in loopback mode for Single-Slot data testing, the
HP/Agilent 8922 is unable to perfrom BER and Fast BER tests and
Dual-Band Handover.
The test involves generating a data file, sending it to the data port on
the DUT and transmitting it on the GSM air interface to the
HP/Agilent 8922. The HP/Agilent 8922 then loops back the data
received on the uplink to the downlink and transmits an identical copy
of the data on the GSM air interface back to the DUT. This file can then
be output on the DUT data port for analysis and comparison with the
original file. This type of test verifies that a given data file can be
presented to the DUT and transmitted and received correctly.
PC
HP 8922
functionality
Uplink
DUT
RS232
Downlink
HP/Agilent
8922
The HP/Agilent 8922 performs a loopback function when performing
Single-Slot data test by retransmitting on the downlink any data bursts
received on the uplink. Note that data bursts (received or transmitted)
are not channel coded.
Data bursts are buffered in the HP/Agilent 8922 for a fixed period of
four frames before they are retransmitted on the downlink. This allows
for processing time within the HP/Agilent 8922 to determine if the
received burst is data or signalling information. It also allows for
processing SACCH frames which contain no data. If the burst is data,
then it is buffered, if the burst is SACCH information, then it is decoded
as normal. The HP/Agilent 8922 inserts valid SACCH frames back into
the downlink.
8 Chapter1
Single-Slot Data Testing
FACCH frames are not processed by the HP/Agilent 8922; they are
simply echoed back on the downlink.
As there is no FACCH signalling once the call is established, the
HP/Agilent 8922 must be in data channel mode before a data call is
established and will not perform channel assignments or handovers
during a data call.
After loopback within the HP/Agilent 8922, the data transmitted back
on the downlink is an exact copy (delayed, but in order) of any data
bursts transmitted by the DUT on the uplink.
Chapter 1 9
Single-Slot Data Testing
10 Chapter1
2 Enabling the HP/Agilent 8922 for
Single-Slot Data Testing
This chapter describes the steps you need to perform to enable your
existing HP/Agilent 8922 to allow it to perform Single-Slot data testing.
11
Enabling the HP/Agilent 8922 for Single-Slot Data Testing
Checking the prerequisites
Checking the prerequisites
Checking the package contents
Your HP/Agilent 8922 option K18 kit contains the following items:
• 1 set of labels to label the HP/Agilent 8922
• 1 x software licence certificate
• 1 x keycard to enable the Single-Slot data test functionality
• 1 x HP/Agilent 8922 Single-Slot Data Supplementary User’s Guide
(this manual)
If any of the above items are missing or damaged contact your local
HP/Agilent representative.
Checking the HP/Agilent 8922 firmware version
To operate the HP/Agilent 8922 Single-Slot Data functionality the
HP/Agilent 8922 must contain firmware version C.01.05 (HP/Agilent
892 P/R) or B.07.09 (HP/Agilent 8922 M/S) or later. To check which
firmware version the HP/Agilent 8922 is running, go to the
CONFIGURE screen.
To upgrade the HP/Agilent 8922 firmware contact your local Agilent
Technologies Sales Representative.
12 Chapter2
Enabling the HP/Agilent 8922 for Single-Slot Data Testing
Enabling the Single-Slot Data functionality
You must enable the Single-Slot data test functionality within the
HP/Agilent 8922 using the keycard supplied as follows.
Step 1. Power on the HP/Agilent 8922.
Step 2. Insert the keycard into the HP/Agilent 8922.
Checking the prerequisites
Step 3. Press the key on the front panel of the HP/Agilent 8922 to access
TESTS
the TESTS screen.
Step 4. Set Location to CARD.
Step 5. Select the Procedure field and select ENABLE as the procedure.
Step 6. Select the Run Test field or press the key on the front panel of the
L1
HP/Agilent 8922 to run the program.
The option Data 9.6k is now present in the Instrument Type field
Chapter 2 13
Enabling the HP/Agilent 8922 for Single-Slot Data Testing
Checking the prerequisites
in the CONFIGURE screen indicating that the Single-Slot data
functionality is correctly enabled.
To disable Single
Slot data
functionality
To disable the Single-Slot Data functionality, repeat steps 1 to 4 of the
procedure for enabling the functionality, set the Procedure field to
DISABLE in step 5 and complete the rest of the procedure.
14 Chapter2
3 Performing Single-Slot Data
Testing
This chapter describes how to perform Single-Slot data testing both
manually and remotely.
15
Performing Single-Slot Data Testing
Setting up the Single-Slot data test
Setting up the Single-Slot data test
Step 1. Connect the mobile station to the laptop PC or other device.
Step 2. Connect the mobile station using its RF cable to the GSM/DCS/PCS RF
IN/OUT port on the HP/Agilent 8922 (or HP/Agilent 83220 if you are
using a Multi-Band system) and power it on.
Step 3. On the HP/Agilent 8922, navigate to the CONFIGURE screen and
configure the Instrument Type field to DATA 9.6k.
Step 4. Power up the laptop PC or other device and ensure that the modem is
configured and initialized correctly (see the modem documentation for
details).
Step 5. Create an ASCII text file on the laptop PC or other device containing
approximately 100 lines of text.
You are now ready to perform the Single-Slot data test.
16 Chapter3
Performing Single-Slot Data Testing
Manual operation
Manual operation
Performing the test
Step 1. On the laptop PC or other device, via the modem software, instruct the
mobile station to establish a call with the HP/Agilent 8922.
Step 2. Transmit the prepared ASCII text file to the HP/Agilent 8922.
Step 3. Compare the received copy of the ASCII text file with the transmitted
copy.
Identical files mean that the test is successful.
Step 4. End the call with the HP/Agilent 8922. either via the modem software
or on the HP/Agilent 8922.
Chapter 3 17
Performing Single-Slot Data Testing
Remote operation
Remote operation
Remote operation is performed using GPIB commands issued typically
from a PC or workstation over the GPIB bus.
GPIB commands for Single-Slot Data
The following GPIB command for Single-Slot data has been added to
the existing GPIB command set for the HP/Agilent 8922. For details on
the rest of the commands, see the HP/Agilent 8922 GSM Test Set User’s
Guide and the HP/Agilent 8922 Multi-Band Test System
Supplementary User’s Guide.
NOTE
While in loopback mode for Single-Slot data testing, the HP/Agilent
8922 is unable to perfrom BER and Fast BER tests and Dual-Band
Handover.
CONF:INST?
CONF
INST?
INST
Sp
string
Description Configures the HP/Agilent 8922 to be either in Speech mode or Data
mode. For Single-Slot data testing, the HP/Agilent 8922 must be in
9.6K data mode before the call is established.
Syntax CONF:INST?
CONF:INST <string>
Options "SPEECH" | "DATA 9.6K"
18 Chapter3
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