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parameter is used in autotest to determine the BER /

RBER / MER limits to be applied to the receiver sensitiv-

ity tests.

QQ55..66::

Does the IFR 2968 test DGNA (Dynamic Group Number

Assignment)?

AA55..66::

No. The IFR 2968 generally supports only those protocol

functions that are required to enable the test set to perform para-

metric tests on the mobile, or to obtain useful information about

the configuration and capabilities of the mobile. The IFR 2968

also endeavours to support protocol functions that can be initiat-

ed by the mobile under normal conditions and to either imple-

ment the requested function or to reject the mobile's request

cleanly. DGNA is only initiated by the network, not the mobile, and

does not enable parametric testing, nor does it obtain useful infor-

mation from the mobile.

QQ55..77::

Does the IFR 2968 test TETRA Packet Data?

AA55..77::

No. The IFR 2968 supports the TETRA Core Services and

also TETRA Short Data Service (SDS). These services are support-

ed by most TETRA mobiles, and they also fulfil the requirements

of enabling parametric testing and obtaining useful information

from the mobile.

QQ55..88::

Why has transmission trunking behaviour changed in the

Phase 3.2 software?

AA55..88::

In the Phase 3.2 software the IFR 2968 implements trunk-

ing timers for a better and more flexible simulation of real network

operation conforming to TIPv3 Core Services. There is now a quiet

period (return to MCCH) between the PTT release on the mobile

under test and the commencement of the 2968 simulating anoth-

er user talking. This quiet period, and the 2968 talk period, are

user configurable in the new SYSTEM PARAMETERS: CALL

TIMERS menu (for details refer to the 2968 Phase 3.2 TETRA sup-

plement issue 10, chapter 3, pages 19 and 20). There is now also

a user configurable hang timer which will automatically clear down

a group call after a period of inactivity.

QQ55..99::

Why has the AUTORUN PARAMETERS menu changed in

the Phase 3.2 software?

AA55..99::

The Phase 3.2 software allows the user to configure up to

six separate call set-up and clear down operations for enhanced

flexibility. These have replaced the previous inflexible autorun

tests of PLACE CALL, CLEAR FROM MOBILE, CALL MOBILE and

CLEAR FROM LAND. There is an additional TT TEST MODE

autorun test for use instead of the REGISTRATION test with

mobiles performing an extended TT test mode registration. For

details refer to the 2968 Phase 3.2 TETRA supplement issue 10,

chapter 7, pages 5 to 16.

QQ55..1100::

Why is 'TEST MODE REGISTRATION' not in System

Parameters in Phase 3.2?

AA55..1100::

This is only applicable to mobiles that support an extend-

ed TT test mode registration to supply their TEI, power class and

receiver class, and to enable the use of TT loopback. Test mode

registration involves the sending of a 'test mode confirm' com-

mand to the mobile after it has completed its normal registration,

including the attachment of groups if required. Mobiles vary in the

number of groups they attach at registration, and the time taken

to do so, and there is no indication in the group attachment sig-

nalling to inform the 2968 when the mobile has attached all of the

groups that it is going to attach.

Therefore, in Phase 3.2, the 2968 MANUAL test mode provides

a [TT test confirm] softkey for the user to press when the mobile

is ready to receive the command. The AUTOTEST mode 'TT TEST

MODE' test provides a user configurable 'wait for group attach-

ment' timer.

QQ55..1111::

What has happened to mobile terminated SDS types 1, 2,

3 and 4 in Phase 3.2?

AA55..1111::

The most commonly used SDS functions are SDS type 4

SDS-TL text messages, SDS type 4 simple text messages, and sta-

tus messages, and these are the functions that appear when the

[send message] softkey is pressed. The other less commonly used

SDS functions (SDS types 1, 2, 3 and SDS type 4 in hex) are avail-

able on a second level by pressing the [other SDS] softkey.

QQ55..1122::

What has happened to the mobile classmark display in

Phase 3.2?

AA55..1122::

This is now accessed via the [show detail] softkey, which

additionally gives access to details of group attachments, status

messages and short data service (SDS) messages.

QQ55..1133::

When a mobile registers and attaches multiple groups,

each group identity is immediately over-written by the next one. Is

it possible to see this information?

AA55..1133::

Yes. Press the [show detail] [groups] softkeys to see the

GSSI values of the first ten attached groups, displayed in decimal

and hex, with Class of Usage for each group. The [more groups]

softkey provides access to further blocks of ten up to a total of 40

groups.

QQ55..1144

: When a mobile sends a text message, the IFR 2968 only

shows the first few characters. Is it possible to see the whole mes-

sage?

AA55..1144::

Yes. Press the [show detail] [SDS message] softkeys to see

SDS-TL text messages in full up to 160 characters. The IFR 2968

also shows other details associated with the message and the

intended destination address of the message.

QQ55..1155::

Is it possible to change the time and date information that

is sent when the IFR 2968 sends an SDS-TL text message to a

mobile?

AA55..1155::

Yes. The IFR 2968 obtains the time and date information

from its real time clock, which can be changed by pressing the

[HELP/SET-UP] hardkey followed by the softkeys [SET-UP] [MISC

CONFIG] [time & date]. The sending of time and date information

is enabled and disabled in the SDS-TL text message set-up menu

(refer to the IFR 2968 Phase 3.2 operating manual TETRA supple-

ment, issue 10, chapter 4, page 27, 'TIME STAMP'). Note that the

year does not form part of the time stamp information sent by the

IFR 2968.

QQ55..1166::

Why can't I make group calls when the mobile is regis-

tered and the PTT pressed?

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