Technical Guide

30
ATTENUATION THROUGH SENTRY SOFTWARE IS
CUMULATIVE
WITH THAT OF THE BOOSTER’S DIP SWITCHES.
ATTENUATION GREATER THAN 25 DB (EITHER MADE BY THE
BOOSTER’S DIP SWITCHES OR CUMULATIVE ADJUSTMENTS OF
DIP SWITCHES AND SOFTWARE) WILL CAUSE THE AFFECTED
BAND TO SHUT OFF AND DISPLAY A SOLID RED LED.
1
2
4
3
5
700 MHz / 800 MHz
To open or close a channel: Select OFF or ON
under the SWITCH column,
7.7 Sentry Operation
Leaving all DIP switches off by default allows the AGC to adjust gain as needed. The absence of red LEDs indicates that the system is
working as intended.
1. CENTER FREQUENCY: This column is used to input the frequency of the channel.
For example, enter 869.000000
in the center frequency box of channel 1, and click the
button. The channel will then
work at 869 MHz. The uplink channel will automatically work on the corresponding channel pair.
2. SWITCH: Use the switch column to open or close a channel.
OFF
closes the channel
ON
opens the channel
3. UPLINK ATT / DOWNLINK ATT: These columns are used to lower the gain of a single channel. Enter a positive value in the range of
1-25.
4. UPLINK PIN / DOWNLINK PIN: These columns show the input power of the uplink and downlink channels. This parameter can only
be queried.
5. BANDWIDTH COLUMN: The bandwidth column is used to display the bandwidth of a particular frequency channel- from 12.5K,
25K, 75K
Set