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2025-114A
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2025-114A
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Last modified
6/5/2025 12:52:54 PM
Creation date
6/5/2025 12:50:09 PM
Metadata
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Template:
Official Documents
Official Document Type
Agreement
Approved Date
05/20/2025
Control Number
2025-114A
Agenda Item Number
9.O.
Entity Name
Communications International
Subject
Agreement for Upgrade to Public Safety Land Mobile Radio Network
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A TRUE COPY <br />V1I1. RF Frequency Test CERTIFICATION ON LAST PAGE <br />RYAN L. BUTLER, CLERK <br />Description <br />The purpose of the testis to measure the TX frequency in anon -mod utated state. The MN GUI interface <br />shows the "Set" frequencies for the transmit path. The true frequency output is measured with calibrated <br />frequency counters and documented on the test data sheets provided. <br />Instructions <br />1. Exit out of the EM2 software if logged on and log on to terminal using HyperTerminal. <br />a. Open the HyperTerminal program and set the following parameters: <br />i. Data Bits: 8 <br />ii. Parity: None <br />iii. Stop Bits: 1 <br />iv. No Flow Control <br />v. Baud Rate: 9600 <br />b. Connect the computer to the terminal using the "COMPUTER" port on the front panel. <br />2. Connect a Frequency Counter to the "RFU" antenna adapter port of the terminal under test and <br />follow the steps below to configure the terminal to measure the transmitter frequency: <br />a. In the Command Line Interface (CLI) go to menu item 3 "Test". <br />b. Under the test menu select menu item 6 "Modem RF Test". <br />C. Under Modem RF Test, select option 1 (toggle): Continuous Wave (CW) Test. <br />vi. Note: CW mode removes the modulation from the carrier to allow accurate frequency <br />measurement. <br />d. Measure the frequency and record it under TX Measurements "Measured Frequency" of the <br />Terminal Acceptance sheet. <br />e. Under Modem RF Test, select option 1 (Toggle):"On Line" to return the terminal back to <br />normal operation. <br />3. Ensure that all of the terminals are returned to "Normal" operation and the Frequency Counter is <br />disconnected. <br />Result <br />The test is deemed passing if the measured frequency is ±10 ppm of the configured frequency. <br />a. ±60 KHz for 6 GHz systems <br />b. b. ±110 KHz for 11 GHz systems <br />Page 21 of <br />
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