The Spectrum Mode Is Displayed In The Upper Right Corner Of The Spectrum, And The Tracking Mode Is Spectrum + Tracking Mode. The First Line Is The Center Frequency Center Frequency Power; The Second Line Captures The Strongest Or Weakest Frequency, Or The Specified Frequency And Power (Displays The Capture Of The Strongest Signal In Capture Mode, And Of The Weakest Signal In Capture + Capture Mode , "Adjust Duplexer Step Size") Frequency And Power) The Third Line Frequency Range (Center Frequency Addition And Subtraction) Frequency Step; F1: Cursor Movement Center Frequency, Frequency Range, Step Cycle Selection (Long Press To Select In The Spectrum And Tracking Mode); F2: Backspace. The Cursor Points To The Frequency Center: Enter Directly With The Numeric Keys Or Adjust The Frequency With The Up And Down Keys F3 And F4 To Adjust The Frequency Within 1m The Cursor Points To The Frequency Range: The Value Is Centered On The Positive And Negative Range Of The Central Frequency, For Example: 0128000 Is The Center Of Plus Or Minus 12.8 M. This Is A Range Of 25.6 Meters Directly Enter The Numeric Keys And Use The Up And Down Keys To Increase Or Decrease The Range. The Cursor Points To Size: Directly Enter The Numeric Keys Or Use The Up And Down Keys To Adjust Size. There Will Be A Slight Change Within The 5k Scan Range To Adapt To The Size Of The Grid. Description. 1. Frequency Range: 136-173 400-470 2. Spectrum Dynamic Range: -127dbm --- 0dbm 3. Resolution: 1db 4. Tracking Source Output Power: -38 Dbm 5.Interface: Bnc 6. Power Supply: External Dc 8---12v Required Material: ABS Color as shown Package Contents:1 x Duplexer Analyzer Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, WhichWill Not Affect The Use Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.