User's Manual

5. Installing the Remote Link
EAC-2100 Manual: (Draft, 02/01) Page 6-8
HANDBACK- THESHOLD –DTC – MINIMUM IMPROVEMENT – (Thresholds
and Power Control Menu)
Default: 2 dB, Range: 0 (disabled) 1 -120 dB
This parameter sets the level of improvement that the EAC calculates will occur before
doing a hand-back on a call that is currently operating on one of the EAC DTC
channels. See above for complete discussion of hand-in and hand-back for DTC.
HAND-BACK THESHOLD –DTC – LOAD SHED LEVEL – (Thresholds and
Power Control Menu)
Default: -90 dBm, Range: 0 (disabled) -40 to -120 dBm
This parameter sets the level of the RSSI at a subscriber from the donor that will trigger
a hand-back by the EAC. That is, when a subscriber is in a call on the EAC, the
subscriber must report in its MAHO message that it sees the Load Shed Level of the
signal (or stronger) from the donor before the EAC will hand back the call. See above
for a complete discussion of hand-in and hand-back for DTC.
NOTE: the Hand-in Load Shed level must be 5 to 10 dB weaker than the
hand-back Load Shed level to prevent hand-in / hand-back ping-pong.
Hysteresis due to the “minimum improvement” criteria will not by
itself prevent ping-pong.
HAND-IN MOBILE POWER LEVEL DTC – (Thresholds and Power Control
Menu)
Default: 2, Range: 0-16
This setting is the DMAC attenuation code that will be used initially for DTC calls that
are handled on the EAC. Note that this applies if the call is processed through the EAC
control channel or if the call is handed in to the EAC. This level determines the initial
and maximum operating power level of the portable. Even if power is reduced (due to
dynamic power control) and subsequently increased, the operating power level of the
portable will never be increased beyond this level.
Level 0 corresponds to +36 dBm, level 1 corresponds to +32 dBm, level 2 is +28 dBm,
and so on. Each step is 4 dB. Subscriber units are usually capable of a maximum of
+28 dBm. It is permissible to set the HANDIN MOBILE POWER LEVEL DTC to 0
even if subscribers are used because the subscriber unit will operate at +28 dBm even if
commanded to power step 0 or 1. The HAND-IN level is also encoded into the EAC
transmitted DCCH data stream such that this is the power level that the subscribers use
when accessing the EAC on the reverse DCCH channel. Therefore, the HANDIN
MOBILE POWER LEVEL – DTC sets the size of the cell, from the standpoint of
subscriber talk back range. Level 2 represents maximum talk back, assuming a
predominance of subscribers are in use.