Frequency Details

Create or edit technical information about the frequency, and indicate if U.S. coordination is required.

When you first access this page to create a new frequency record, select the Transaction Type. If you select "Modification", a new browser window opens and displays the Frequency List, where you can select a frequency to modify. (The frequency information will be copied to this page for editing.)

The Station Type determines which fields on this page are available for editing. If you select Tx Only, then the fields related to a receiver cannot be modified and will not be saved. If you select Rx Only, then the fields related to a transmitter cannot be modified and will not be saved. If you select Both, all fields are available for editing and will be saved with the record.

On the Application Utilities page, you can download ELAZDI: a Microsoft Windows application that can calculate distance, azimuth and elevation angles between two stations.

Fields

Application Type

Indicates the type of change to this record for the application. When you first define the record, select the type of change. If you select "Modification", a new window appears so that you can select the record to modify. Once you have saved the record, you cannot modify this field.

Record Identifier

Number assigned to each individual frequency record at the time of the original data entry. You cannot edit this field directly. When adding a new frequency, this field remains blank. If you are modifying an existing frequency, the record ID is copied to this field.

Tx/Rx

Indicates whether the station operates as a transmitter (Tx), receiver (Rx), or both (Tx/Rx). If you select Tx Only or Rx Only, fields that are not related to the frequency are disabled, and any values in those fields will not be saved.

Last Edited

The date that this record was last modified and saved. (This field does not appear when defining a new record.)

Frequency (Tx)

Assigned transmit frequency or lower frequency for a band in Mhz. A valid value is from 0.000100 to 99000.000000 MHz.

For GPS active repeaters the transmit and receive frequency is 1575.42 MHz. Enter as a single TX/RX type record.

Frequency (Rx)

Assigned receive frequency or lower frequency for a band in MHz. A valid value is from 0.000100 to 99000.000000 MHz.

Total Attenuation (Tx)

Total attenuation is the summation of losses in dB between the radio's Tx antenna port and antenna. Include the losses associated with monitored hot stand-by or diversity configurations as indicated by the equipment manufacturer. A valid value is from 0 to 30 dB.

For GPS active repeaters it corresponds to the frequency response of the repeater between the -3 dB points, which is typically that of the bandpass filter of the outdoor unit.

Total Attenuation (Rx)

The total attenuation is defined as the summation of the losses in dB, between the radio's antenna coupling or antenna branching unit, and the antenna for the transmit and receive paths. Include any additional branching losses for both the transmit and receive paths as indicated by the equipment manufacturer for the equipment configuration used. Include the losses associated with monitored hot stand-by or diversity configurations as indicated by the equipment manufacturer. A valid value is from 0 to 30 dB.

RF Output Power

The RF Output Power is defined as the transmitter power in WATTS, that is present at output of the radio's antenna coupling or antenna branching unit. Usually, this is the value indicated in the equipment manufacturer's specification sheet. If the transmitter power is adjustable, indicate the maximum adjusted value in Watts. If the transmitter is capable of Automatic Power Control (APC), indicate the maximum APC value in Watts. (On the edit form, you may enter this value in dBm or Watts.) If the power is adjustable or if the transmitter is capable of Automatic Power Control (APC), indicate the maximum value in Watts. A valid value is from 0.0001 to 9999999.9999 W.

Radio Model Number

The model name or number of the radio model as specified by the manufacturer. Click to search a list of valid radio equipment models. (If this field is not blank, the search is executed automatically.) From the search results, click on the Radio Model Number to insert that number into the application form.

Select the GPS active repeater model number from the list of radios available in Spectrum Direct. The model number of these devices will have the prefix "(AR)". If the model number is not available (i.e. it is a new model), create a new radio data entry by using the "(AR) GPSRKL1 1.5G" model as an example. Note that code "(AR)" is required to be entered prior to the model number to indicate that the station is an "active repeater".

Antenna Model Number (Tx)

The antenna model employed for the transmitter. Click to search a list of valid antenna models. (If this field is not blank, the search is executed automatically.) From the search results, click on the Antenna Model Number to insert that number into the application form.

For GPS active repeaters select the "omni generic" antenna model from the list of antennas available in Spectrum Direct;

Antenna Model Number (Rx)

The antenna model employed for the receiver. Click to search a list of valid antenna models. (If this field is not blank, the search is executed automatically.) From the search results, click on the Antenna Model Number to insert that number into the application form.

Gain (Tx)

The gain of the transmitting antenna (in dB) relative to a half wave dipole (dBd). In case of a directional antenna, the gain is in the direction of maximum radiation. For frequencies above 890 MHz, the antenna gain is expressed relative to an isotropic radiator (dBi). A valid value is from 0.0 to 70.0 dB.

For GPS active repeaters the TX antenna gain (in dBi) is of the indoor transmitting antenna.

Gain (Rx)

The gain of the receiving antenna (in dB) relative to a half wave dipole (dBd). In case of a directional antenna, the gain is in the direction of maximum radiation. For frequencies above 890 MHz, the antenna gain is expressed relative to an isotropic radiator (dBi). A valid value is from 0.0 to 70.0 dB.

For GPS active repeaters the RX antenna gain (in dBi) is of the outdoor GPS receiving antenna (without considering the preamplifier).

Polarization (Tx)

The transmission antenna's polarization. Select the polarization from the drop-down list. Possible values are:

• Horizontal
• Vertical
• Horizontal or vertical selectable
• Circular, right
• Circular, left
• Circular
• Rotating
• Elliptical
• Linear
• Other
• Dual
• Mixed
• Slant, right
• Slant, left

For GPS active repeaters the TX/RX antenna polarization is Circular (right).

Polarization (Rx)

The receiving antenna's polarization. Select the polarization from the drop-down list. Possible values are:

• Horizontal
• Vertical
• Horizontal or vertical selectable
• Circular, right
• Circular, left
• Circular
• Rotating
• Elliptical
• Linear
• Other
• Dual
• Mixed
• Slant, right
• Slant, left

Azimuth (Tx)

Azimuth (in degrees from True North) of the transmitting antenna's direction of maximum radiation (lobe). For an omnidirectional radiation pattern, enter 0 degrees. To indicate an azimuth pointing true north, enter 360.0 degrees. For a bi-directional radiation pattern (two main lobes separated from each other by 180 degrees), enter the azimuth of one of the two lobes. It should be noted that the azimuth of the antenna lobe might not correspond to the physical azimuth of the antenna, especially in the case of bi-directional antennas. Mandatory except for transportable. Values must be between 0.0 and 360.0.

For GPS active repeaters default the TX/RX antenna azimuth to 0 degrees.

Azimuth (Rx)

Azimuth (in degrees from True North) of the receiving antenna's direction of maximum radiation (lobe). For an omnidirectional radiation pattern, enter 0 degrees. To indicate an azimuth pointing true north, enter 360.0 degrees. For a bi-directional radiation pattern (two main lobes separated from each other by 180 degrees), enter the azimuth of one of the two lobes. It should be noted that the azimuth of the antenna lobe might not correspond to the physical azimuth of the antenna, especially in the case of bi-directional antennas. Mandatory except for transportable. Values must be between 0.0 and 360.0.

Elevation Angle (Tx)

The transmission antenna's vertical elevation angle (beam tilt) with reference to horizontal ground in degrees. A valid value is from -90 to 90 degrees.

For GPS active repeaters default the TX elevation angle to -90 degrees.

Elevation Angle (Rx)

The receiving antenna's vertical elevation angle (beam tilt) with reference to horizontal ground in degrees. A valid value is from -90 to 90 degrees.

For GPS active repeaters default the RX elevation angle to +90 degrees.

Antenna Height Above Ground Level (Tx)

The transmission antenna's height above ground level, in metres, as measured with reference to the physical centre of the antenna. A valid value is from 0 to 500 m.

For GPS active repeaters the height of the TX antenna (above ground level) is that of the indoor transmitting antenna.

Antenna Height Above Ground Level (Rx)

The receiving antenna's height above ground level, in metres, as measured with reference to the physical centre of the antenna. A valid value is from 0 to 500 m.

For GPS active repeaters the height of the RX antenna (above ground level) is that of the outdoor GPS signal receiving antenna.

Unfaded Received Signal Level (dBW)

The unfaded signal strength received at the station's receiver, in dBW. On the edit form, you may enter this value in dBm or dBW. A valid value is from -200 to 0 dBW.

For GPS active repeaters default the unfaded received signal level to -130 dBm.

Total Propagation Availability (%)

The propagation reliability over a one-year period, calculated using the Vignant-Barnett method. (If another method of calculation is used, it should be indicated in the Other Information section of the Covering Letter.) A valid value is a percentage to five decimal places.

For GPS active repeaters default the propagation availability to 99%.

Is this frequency used for diversity?

Indicates if frequency diversity is used on the selected frequency.

Is angle diversity used?

Indicates if angular diversity is used on the selected frequency.

Diversity Antenna Model

If the selected frequency uses signal diversity, the antenna model used to provide diversity. Click to search a list of valid antenna models.

Diversity Antenna Height Above Ground Level (m)

If the selected frequency uses signal diversity, the height above ground level, in metres, of the antenna used to provide diversity. A valid value is from 1 to 500 m.

Coordination with the United States

Indicates that international coordination is required. If coordination is required, the Spectrum Management Officer will later use this field to indicate when the frequency is ready for coordination.

For GPS active repeaters no international coordination is required.

Buttons

Save

Click to save changes to the frequency.

Cancel

Click to discard the information you have entered on the form without saving it.