QTech Data Systems QDR Digital 900MHz Radio - Manual (Page 12)

QDR – QTech Digital Radio – Owners Manual – v1.3 – August 2012 12
www.qtech.co.nz Tel: 03 3663713
8.0 Important Notes and Warnings
Aerial Connection
The QDR should never be operated without an aerial connected. If the radio transmits
without an aerial the RF power has nowhere to go but back into the radio, which can
damage it.
Transmitted RF Power Levels
The QDR must never be operated in violation of RSM license conditions. Ensure that the
Transmit Power Level and aerial system design do not exceed the limitation.
Please be considerate of other users of the ISM Band.
AS/NZS 4268:2008 specifies a maximum EIRP of 1 watt.
Warning – Do NOT use Switch Mode Power Supplies (SMPS) with this
product. The DC power supply used for this product MUST have a grounded
negative or be a “linear” transformer based plug pack. The reason is that the
aerial, programming port and external connections can provide exposed earth
points and the SMPS can impose an AC voltage on the DC ground, which can
lead to damage. Suitable cost effective plug packs are available from QTech
P/N PD5412.
Note – SMA Aerial Connectors
QDR. The aerial connector on the QDR
uses the standard/conventional polarity
SMA socket.
QTech supplies suitable aerials for the
QDR with a standard SMA plug, as
shown to the right.
QDR Type Aerial Cable
XTend Radio. If you are using QDRs to
upgrade an existing system, such as
from Digi XTend radios, this must be
stated at time of ordering.
The Digi XTend type radio uses a non
standard, reverse polarity SMA
connector, often referred to as RP-SMA,
as shown to the right.
XTend Type Aerial Cable