The following fields ❶ to ❻ (Fig. 10.6) are only of importance if the scroll variable
To digital TC directs call setup to a digital traffic channel.
❶
RF band. Select between 800 MHz and 1900 MHz.
➋
Digital traffic channel DTC. The permissible figures are identical to the
FVC numbers and likewise depend on the system (A/B) (see appendix,
"Technical Data").
❸
Digital verification color code DVCC (any figure between 1 and 255 is
permissible).
❹
With this scroll field you choose the power level 0 to begin with (scroll
variables: 0 to A).
❺
Enter a time alignment value (any figure between 00 and 31 is permissi-
ble; see "Burst Power & Time Alignment"). For measurements in the
Constellation display and the Numeric display the value has to be < 26.
❻
Enter the number of the slot in which data are to be exchanged on the
digital traffic channel. The permissible figure depends on whether the
mobile is fitted with a full-rate or a half-rate speech codec (full rate: 1, 2,
3; half rate: 1, 2, 3, 4, 5, 6).
❼
With this scroll field you choose the speech-codec type of the mobile
(scroll variables: Full Rate , Half Rate). This setting affects the
permissible figures for the time slot. There will be no call setup if the
setting is wrong.
❽
Enter an RF output level for the test setup that is high enough to ensure
(to begin with) a reliable connection between the mobile and the setup
(recommended figure: –60 dBm). The units for the level can be selected
as usual with
[UNIT/SCROLL]
(dBm, dBµ, mV/µV).
Note: Setting the RF level in the basic IS-136 test mask is only possible
on the keyboard (spinweel disabled). In the MAHO and RX-BER masks
the level can be altered continuously with the spinwheel.
➋
❹
❺
❶
❸
❼
❻
¥
Fig. 10.6: Lower entry sector of basic IS-136 mask is only of importance if call
setup is directed to digital traffic channel.
10
General Test Preparations IS-136 MS
10-11
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