BIG TAJFUN 1000 INSTRUCTION MANUAL

Transcription

1 BIG TAJFUN 1000 INSTRUCTION MANUAL

2 Acknwledgment Thank yu fr purchasing Pwer linear amplifier BIG TAJFUN frm VH Electrnics. During its prductin, we used the latest knwledge in the field f VHF Pwer amplifiers and the mst advanced technlgy in the management, cmmunicatin and display systems. We believe that ur prduct will exceed yur expectatins and will be wrking prperly t yur satisfactin. Please take a few mments t read this manual and get acquainted with this device. I. GENERAL INFORMATION I.1 Descriptin TAJFUN is a small, lightweight but rbust LDMOS VHF Pwer Amplifier (hereafter PA) wrking in amateur 70cm band with utput pwer up t 900W. I.2 Technical parameters Frequency Cverage Operating Mde Output Pwer MHz Amateur band FM, SSB, CW, DIGI 900W CW 700W SSB, 21 C FM and DIGI 50% duty cycle Input Pwer 18-22W ( Inside 3dB hybrid attenuatr ) Pwer Gain Typically 18dB LDMOS MRFE6VP61K25H ( 1250W ) Freescale, PUSH PULL Cnfiguratin Class Operating AB Input / Output Impedance 50 Ω Cnnectr 2 x N-female Suppressin f harmnics 70 dbc (Lw Pass Filter) Intermdulatin distrtin -32 dbc Cling Pwer Supply Inside Rbust heatsinks, 3 fans PA + 1 fan Pwer Supply Input: VAC, 45-66Hz Output: 48VDC / 1800W Wrking temperature 0-45 C, Max. Humidity 90% Dimensin 266 x 105 x 294mm ( width x height x depth ) Weight 6,2kg Caxial Relay CX600NC CX140D Page 2 f 10 VH Electrnics Slvakia

3 I.3 Prtectin, measurements and display Prtectin PWR, REF, Temperature, Imax, Umax/Umin Cntrl / Display Clur TFT display Measurements and display: Drain Current DC Vltage Output Pwer PWR Reflected Pwer REF Peak Pwer PEP Temperature I.4 Put int peratin If yur device was transprted r stred in a cl r cld envirnment, it is necessary t unzip it first and let it dry in a warm envirment (by ding this yu will prtect yur device against a pssible water cndensatin). Then yu shuld cnnect the cnnecting caxial cable t the RF INPUT and RF OUTPUT jacks n the rear panel (N-female cnnectr) and attach the PTT RCA (CINCH) cnnectr. Bradcasting (Tx) is active when cnnected t GND. Back panel Page 3 f 10 VH Electrnics Slvakia

4 Insert a supplied pwer crd int the POWER. Then turn n the pwer switch. Initializing and cntrl equipment starts. After a shrt time, the fans will turn fr a mment at a full speed and then, after a while, they reduce int lw speed accrding t the current temperature f the LDMOS transistr. Finally, it perfrms the initializatin f the TFT tuch screen and it displays: Basic menu - Hme QSO, Cntest QSO By pressing an icn n the screen we select: I.4.1 Mde Hme QSO This mde is suitable fr the standard peratin f the Hme fr the ccasinal QSO with less demand fr cling f the PA. Speed cling fans are cntinuusly cntrlled (PWM) accrding t the temperature f the LDMOS transistr independently f the cntrl f the PTT (Rx/Tx mde). Advantage quiet peratin. I.4.2 Mde Cntest QSO This mde is suitable fr the Cntest, eventually fr DIGI peratin with high demands n cling f the PA. After switching f the PTT (Tx mde) it switches the maximum speed f the cling fans. After switching ff the PTT (mde Rx) the speed is cntinuusly cntrlled (PWM) accrding t the temperature f the LDMOS transistr. Advantage - pwerful cling fr demanding peratins. After selecting the perating mde we will get t the menu fr Display peratin. In this menu, the PA des nt respnd t cntrl PTT. Caxial relays RF INPUT linking directly t the RF OUTPUT cnnectr (bypass the amlifier). This mde ideal fr lcal QSOs at lw pwer wihut having t discnnect the PA. Page 4 f 10 VH Electrnics Slvakia

5 By pressing n the Icn, yu can chse frm the fllwing views: Standard Bargraph Peak All values I.4.3 Standard It shws the perfrmance f the Output Pwer - PWR, Reflected Pwer REF, bth appears in a bargraph and their values are represented in a numerical frm + it shws the values f the Temperature, Current and Vltage Mde Rx Mde Tx I.4.4 Bargraph It shws the perfrmance f the Output Pwer - PWR, Reflected Pwer - REF and the Temperature TEMP; they are all shwn in a bargraph and their values appear in numerical frm I.4.5 Peak It displays values as Standard, but PWR PEP and REF PEP are displayed in the peek values and the maximum values are represented during the hld f the PTT (Tx mde) Page 5 f 10 VH Electrnics Slvakia

6 I.4.6 All values It displays values as Standard. PWR PEP and REF PEP are displayed in the peak value and the maximum value are represented during the hld f the PTT (Tx mde) + it shws the values f the Cupler U PWR and U REF [mv] fr servicing. I.5 Respnding in excessing the parameters Alert / Blck-Warning I.5.1 Output Pwer PWR Alert - when crssing PWR abve the set value ( 1000W) it gets int a red bargraph, the numeric value turns red and the buzzer beeps Blck - when crssing PWR abve critical value ( 1100W) it declares "Warning" n the display and it blcks the LDMOS (Inhibit -5V), it turns the cax relay ff and it blcks the PTT. In rder t restre peratin it is necessary t Restart cnfirm Warning and return t the Display peratin Alert Blck - Warning Page 6 f 10 VH Electrnics Slvakia

7 I.5.2 Reflected Pwer REF Alert - when crssing PWR abve the set value ( 100W) it gets int a red bargraph, the numeric value turns red and the buzzer beeps Blck - when crssing REF abve critical value ( 110W) it declares "Warning" n the display and it blcks the LDMOS (Inhibit -5V), it turns the cax relay ff and it blcks the PTT. In rder t restre peratin it is necessary t Restart cnfirm Warning and return t the Display peratin Alert I.5.3 Temperature Alert - when crssing the temperature abve the set value ( 65 C) it gets int a red bargraph, the numeric value turns red and the buzzer beeps Blck - when crssing PWR abve critical value ( 70 C ) it declares "Warning" n the display and it blcks the LDMOS (Inhibit -5V), it turns the cax relay ff and it blcks the PTT. In rder t restre peratin it is necessary t Restart cnfirm Warning and return t the Display peratin Alert Page 7 f 10 VH Electrnics Slvakia

8 I.5.4 DC Vltage Alert - when crssing DC Vltage abve the set value ( 50V) the numeric value turns red and the buzzer beeps Blck - when crssing DC Vltage abve critical value ( 55V ) it declares "Warning" n the display and it blcks the LDMOS (Inhibit -5V), it turns the cax relay ff and it blcks the PTT. In rder t restre peratin it is necessary t Restart cnfirm Warning and return t the Display peratin Alert I.5.5 Drain Current Alert - when crssing Current abve the set value ( 31A) the numeric value appears red and the buzzer beeps Blck - when crssing Current abve the critical value ( 35A ) it declares "Warning" n the display and it blcks the LDMOS (Inhibit -5V), it turns the cax relay ff and it blcks the PTT. In rder t restre the peratin it is necessary t Restart cnfirm Warning and return t the Display peratin Alert Page 8 f 10 VH Electrnics Slvakia

9 BLOCK DIAGRAM Page 9 f 10 VH Electrnics Slvakia

10 I.6 Sequencer I.6.1 Time cntrl caxial relay Cntrl unit Cntrl Bard switch input and utput caxial relays in the crrect time sequence accrding t the PTT signal. Time T1 and T2 can be changed using the sftware Service Tajfun 1000 via USB prt PA. Nrmally set times: T1 (Relay IN)... 20ms T2 (Relay OUT)... 25ms ATTENTION!!! Carefully cnsider any change in these times nt t cause destructin LDMOS r accident PA. Page 10 f 10 VH Electrnics Slvakia