Repeater
Operation
3-3
current configuration and settings and displays them in the application window. See figure 3.1.
When no repeater is detected the application clears the window.
3-2.2.3
Unit Type and Configuration Parameters
At the top of the window is displayed the repeater’s model number, serial number, frequency band,
modulation, and filter bandwidth parameters. The “Band” parameter is the PCS band setting of the
repeater. There are 9 possible PCS bands combined into 3 dual band selections, AD, BE, and FC.
Bands AD, BE, and FC are wide band options that give the repeater the ability to operate in two
bands. The modulation parameter displays which modulation type the repeater is configured for,
CDMA, TDMA, or GSM. The bandwidth parameter is the filter bandwidth of the repeater.
3-2.2.4
Channel Number and RF Frequency Parameters
Channel number parameters Donor and Server are used to set the RF frequency of the donor and
server RF paths. The Donor channel controls the RF frequency being transmitted on the downlink.
The Server channel controls the RF frequency being transmitted on the uplink. If the repeater is not
configured for dual frequency operation, the two channel numbers will track each other. The actual
frequency of a selected channel number can be viewed by placing the mouse pointer over the channel
number of interest.
The repeater can be set to any allowable frequency/channel in the band of the repeater by changing
the channel number. The channel can be changed by either clicking the Up/Down arrow next to the
channel, or by placing the cursor in the channel number box and typing in a new channel number.
Don’t forget to press the <Enter> key when typing in a channel number. When the channel number
is changed the forward and reverse frequencies for that channel are computed for display.
It is important to insure that the frequency/channel that the repeater is set to is at least half the
bandwidth away from the band edge in which the repeater is to be operated. For example, if
operating a repeater with a 5MHz filter that needs to be set to the bottom edge of Band A, the
repeater should be tuned such that the frequency/channel is 2.5MHz away from the beginning of
Band A. This is done to ensure that no out-of-band signal is amplified.
3-2.2.5
Downlink and Uplink Gain Parameters
The gain values for the corresponding RF paths can be changed by either clicking the Up/Down
arrow next to the gain parameter, or by placing the cursor in the desired parameter window and
typing in the value. The ability to change the downlink gain parameter is disabled when the Auto-
Leveling Control (ALC) feature is enabled. Also, the ability to change the uplink gain parameter is
disabled when the Reverse Tracking (Rev Tracking) feature is enabled.
3-2.2.6
RF Power Out Parameters
The “Pwr” parameters display the current RF power out of the repeater level in dBm. These are
status information only
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