8G093X01 R5
VR Programming Guide
August 2022 Page 133 of 144
In case of insufficient VR Tx Power or poor sensitivity, please verify that the frequencies
programmed in the VR are within the filtering specifications as indicated on the duplexer and
in-band filtering labels.
Ensure the VR is only enabled on MSU Modes using the frequency plan for the specific VR
Model.
Multiple issues when using DVRS with TDMA*
Symptom 1: A TDMA talkgroup is configured for “interrupt never” operation. A call on this
TDMA talkgroup is in progress from a portable subscriber unit (PSU) through the DVRS to
other radios. Another system subscriber unit (SSU) attempts to interrupt the call in progress.
This interrupting talkgroup call is granted when it should not have been granted.
Symptom 2: When using DVRS on a TDMA talkgroup, a subscriber may experience a grant
followed by a call where the PSU
audio is not successfully transmitted through the system. Private calls do not experience this
problem.
Resolution: Set the zone level Grant Timeout Timer in the UNCW to 2.2 seconds or greater
when any DVRS units are in use.
*See Appendix 2 – Grant Timeout Timer
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