Holland-electronics ST-5128S Manuale Utente

Model St 5128s Portable Field Strength Meter / Spectrum Analyzer User’s Manual

9MAIN MENU Pressing the F4 (ESC) soft key while in any screen or mode will return the meter to Single Channel Measurement Mode and the Main Menu

10 2. Frequency Selection – The carrier frequency is displayed at the top of the LCD screen. A specific center frequency can

11Carrier Level Difference (V-A) Measurement The ST5128 can measure the difference in power levels between video and audio carriers of a defined ch

12 SINGLE CHANNEL SPECTRUM ANALYZER MEASUREMENT MODE (FOR REFERENCE ONLY) The st5128s has the capability of measuring the frequency spectrum of a

13 The soft keys F1 – F4 perform the following functions in the Spectrum Analyzer Measurement Mode: F1 – REF – Allows the user to adjust the y-a

14 ALL FREQUENCY FULL BAND SPECTRUM ANALYZER MODE The ST5128 has the capability to scan and display the field strength for all frequencies across t

15Operation: 1. To adjust the y-axis power level coordinates and reference level a. Press the F1 (REF) soft key. b. Adjust the reference level

16CARRIER / NOISE DIFFERENTIAL MEASUREMENT (C/N) MODE While in the sub-menu of the single channel measurement screen, press the F3 (C/N) soft key to

17 Operation 1. Using the numeric keypad, enter the number of the channel to be measured, and then press then CH key. Or, press the low, mid or

18 MULTI-CHANNEL SPECTRUM ANALYZER MEASUREMENT MODE The Multi-Channel Spectrum Analyzer measurement mode measures and displays the power levels

1Table of Contents Introduction ... 2 Specifications

19Operation: 1. To adjust the y-axis power level coordinates and reference level a. Press the F1 (REF) soft key. b. Adjust the y-axis power coo

20Holland Electronics LLC Limited Warranty Holland Electronics LLC, warrants that the product enclosed with this L

21APPENDIX 3.1 Standard CATV Channel List of U.S.A. Channel Video carrier freq. (MHz) Audio carrier freq. (MHz) Channel Video carrier freq. (M

22Channel Video carrier freq. (MHz) Audio carrier freq. (MHz) Channel Video carrier freq. (MHz) Audio carrier freq. (MHz) 65 469.25 473.75 10

233.2 Standard VHF/UHF Channel List of U.S.A. Channel Video carrier freq. (MHz) Audio carrier freq. (MHz) Channel Video carrier freq. (MHz) Audio

24

2INTRODUCTION The ST5128 hand-held field strength meter uses RF signal processing techniques and microprocessor technology to produce quick and accur

3SPECIFICATIONS Input Impedance 75 Ohms Input Frequency 46 – 860 MHz Frequency Stability &

4Keypad Controls See Figure 1 to locate the following keypad controls. 1) LCD Display Screen 2) PWR - Power – For powering up and powering d

5 15 3 8 7 6 2 10 9 12 1 11 4 5 14 13 Figure 1. Model ST5128 external features

6POWERING THE METER The digital signal level meter can either be powered by an external AC voltage source or by the internal rechargeable NiMH batte

7METER SETTINGS SCREEN Press the SET key to access the settings screen (fig. 2). Options include the following: 1) selecting between CATV or VHF/UH

8 4. To adjust the contrast level of the LCD display: 1 Press the SET key (if not already in the settings screen). 2. Press the F3