JTECH Communications Inc. SERIES2600 User Manual
JTECH UHF Desktop Transmitter Installation and Operation Guide 320115K
Page 32
Appendix C – Transmitter Power Adjustment
The UHF Desktop Transmitter offers a full 2 watts of power output to deliver
considerable range and is shipped from the factory at the full power setting as a
default. The transmitter also offers an internal adjustable power setting controller
to best exploit these range capabilities (Fig. 11.)
Enlarged sectional side view of transmitter (far left) with examples of the power adjustment
control showing reduced power (low; 100mW) to full power (high; 2W) power
(Note: CCW = counter-clockwise; CW = clockwise)
Setting Power for use with Out-Of-Range (OOR)
When implementing the OOR feature with the Glowster or CommPass pagers,
JTECH recommends initially adjusting the transmitter power to the lowest power
setting (full CCW – see above), based on the transmitter having shipped at the
default 2 watt high power setting. Once adjusted to minimum power, to increase
the overall range, adjust the power upward (turn power screw to the right) in
small increments until achieving the desired range (before the OOR alert is
observed.) In almost all cases, very little power will be required to effectively
utilize the OOR feature. Area coverage and range estimates for the UHF
Desktop transmitter are depicted in the chart below. Transmitter location and
building construction will have a significant impact on range. Site specific testing
is required to optimize coverage area.
When implementing the OOR feature with the Glowster or CommPass pagers,
JTECH recommends initially adjusting the transmitter power to the lowest power
setting (full CCW – see above), based on the transmitter having shipped at the
default 2 watt high power setting. Once adjusted to minimum power, to increase
the overall range, adjust the power upward (turn power screw to the right) in
small increments until achieving the desired range (before the OOR alert is
observed.) In almost all cases, very little power will be required to effectively
utilize the OOR feature. Area coverage and range estimates for the UHF
Desktop transmitter are depicted in the chart below. Transmitter location and
building construction will have a significant impact on range. Site specific testing
is required to optimize coverage area.
Transmitter Power
Power Adjust Setting
Range
Low
0.01 Watts
Full CCW
550 ft.
Medium Low
0.02 Watts
~15° from full CCW
1200 ft.
Medium
0.15 Watts
~30° from full CCW
2000 ft.
High
2.00 Watts
Full CW
4000 ft.
NOTE: It is possible to reduce the power output below the lowest (100mW) setting to achieve
very short range with the OOR feature by inserting an attenuator between the transmitter antenna
port and the wire antenna. For example, a 6dB attenuator will reduce the power output at the
lowest power setting by approximately half. Please consult JTECH Customer Care to attempt to
achieve very short range limits in conjunction with the OOR feature.
very short range with the OOR feature by inserting an attenuator between the transmitter antenna
port and the wire antenna. For example, a 6dB attenuator will reduce the power output at the
lowest power setting by approximately half. Please consult JTECH Customer Care to attempt to
achieve very short range limits in conjunction with the OOR feature.
Under no circumstances should the transmitter be operated without the
antenna as this will void the warranty and may damage the transmitter unit.
antenna as this will void the warranty and may damage the transmitter unit.
Low Power
High Power