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8960 GSM/GPRS/EGPRS Online User's Guide
E1968A, E6701F, E6704A
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Flexible Timeslot

Last updated: May 21, 2009

This section is only applicable to the GPRS/EGPRS lab applications.

The flexible timeslot function allows you to position timeslots within the TDMA frame as much flexibility as possible. You can use the GPIB command CALL:(PDTCH|PDTChannel):MSLot:CONFig to set the multislot configuration to `Custom' , then use the GPIB command CALL:(PDTCH|PDTChannel):MSLot:CONFig:CUSTom:TSLots to customize the multislot combination as your requirement.

Constrains on Flexible Timeslot Configuration

When using the Flexible Timeslot Multislot Configuration, the following overriding restrictions apply:

  • Any downlink timeslot can be selected except
    • `0' when BCH ARFCN is equal to PDTCH ARFCN
    • `1' when B CH ARFCN is equal to PDTCH ARFCN and PBCCH is ON .
  • As the hardware of the test set can only demodulate up to 6 contiguous timeslots, All uplink timeslots must lie within a 6 timeslot window which cannot not cross the TDMA frame boundaries. For active cell operation the uplink timeslot window must also include all timslots that the mobile uses to transmit on. For example, the timeslots that the PACCH is transmitted on.
  • Timeslot 0 and 7 can not be used simultaneously if frequency hopping is on.
  • If the sum of the downlink and uplink timeslots exceed seven, timing advance must be in the range 32 to 63

How to set the Flexible Timeslot

The following procedure details how to access and configure the Flexible Timeslot Multislot Configuration.

  1. Press CALL SETUP .
  2. Press PDTCH parms ( F9 )
  3. Press the More key on the lower right corner to display the PDTCH parms (2 of 3).
  4. Press Multislot Configuration ( F7 ).
  5. Press Custom Multislot Cfg ( F8 ), Use the knob to turn on/off the downlink and uplink timeslots as you need.
  6. After setting, press Apply Changes ( F5 ) and check the custom timeslot settings on the screen.

Operating Considerations

The flexible timeslot is only available in the following operating modes: Active Cell, GPRS BCH+PDTCH, EGPRS BCH+PDTCH, GPRS BCH+TCH+PDTCH and EGPRS BCH+TCH+PDTCH.

The `Burst to Measure' setting is apply to the relative uplink burst. For example, if uplink timeslots 2 and 5 have active bursts, value `1' of `Burst to Measure' refers to uplink timeslot 2 and value `2' of `Burst to Measure' refers to the uplink timeslot 5

The following measurements do not support non contiguous uplink timeslots:

  • Transmit Power measurement
  • Phase and Frequency Error Measurement
  • Power versus Time Measurement
  • Output RF Spectrum Measurement
  • EGPRS Transmit Power Measurement
  • Modulation Accuracy Measurement.

The following measurements do not support non overlapped timeslots:

  • Transmit Power measurement
  • Phase and Frequency Error Measurement
  • Power versus Time Measurement
  • Output RF Spectrum Measurement
  • IQ Tuning Measurement
  • Dynamic Power Measurement
  • EGPRS Transmit Power Measurement
  • Modulation Accuracy Measurement
  • EGPRS Dynamic Power Measurement.

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