User's Manual

8 3 6 A 2 k W UHF Tr a nslat or , I nt erna lly Diple x ed Set Up a nd Ope r at ion Pr oce dur e

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I nitially t he Translat or should be t urned on wit h the RF Out put at (A11) t he Coupler Assem bly

term inated into a dum m y load of at least 2000 Wat t s. I f a load is not available, check that t he

Out put of t he Coupler Assem bly is connect ed t o the Ant enna for your Syst em .

Connect t he Ant enna out put t o t he “ F” connector J5 for 75Ω or t o t he “ N” connect or J1 for 50Ω,

located on t he rear of the VHF/ UHF Receiver Tray..

Switch On t he Main AC, UHF Excit er, Am plifier # 1, Am plifier # 2, Am plifier # 3 and Am plifier # 4 Circuit

Breakers locat ed on the AC Dist ribution Panel facing the rear of t he Cabinet m ount ed behind the

rear door. On t he UHF Excit er Tray, swit ch t he Operate/ Standby Swit ch t o Standby and the

Auto/ Manual Swit ch t o Manual. Norm al operat ion of the Translator is in Aut om at ic. Aut om atic

operation uses t he Video I nput t o t he UHF Excit er as an Operat e/ Standby Switch. I n Aut o, if the

I nput Video is lost for approxim at ely 7 seconds, the Translator will aut om at ically revert t o St andby

and when the Video Signal is restored, t he Translator will quickly ret urn t o Operat e.

Move the Operat e/ Standby Swit ch, locat ed on the UHF Excit er Tray, to Operat e. Note the power

supply reading, + 26.5 VDC, on the front panel of the UHF Am plifier Trays. N ote : I f the Translat or

does not swit ch t o Operate, when t he Operate/ Standby Swit ch is swit ched t o Operat e, check t hat

an External I nt erlock Plug, with a Jum per wired from Pins 23 to 24, is connect ed t o Jack ( J11)

located on t he rear of the UHF Excit er or if (A17) t he Opt ional A/ V I nput & Rem ot e I nt erface

Assem bly is present in your Syst em , the External I nt erlock Plug, with a Jum per wired from Pins 21

to 22, is connected to Jack ( J9) on the Assem bly. Observe the front panel Met er reading in the

% Visual Power posit ion on the UHF Excit er Tray, it should read 100% . I f needed, readj ust the

screwdriver adj ust Power pot locat ed on the front panel of the UHF Excit er for 100% . As you are

checking the Power Level, check t he Met er Reading in the % Reflect ed Power Posit ion. I f the %

Reflected Power is very high, above 50% , a problem with the Output Coaxial Lines is present and

needs t o be checked. A cent er bullet m issing from the 7/ 8" Rigid Coax Lines or loose bolt s on t he

connect ions can cause t his problem . Ret urn the Operat e/ Standby Switch to Standby.

The Gain and Phase controls located on the front panels of the individual UHF Am plifier Trays were

adj ust ed at the factory to att ain 100% Output of the Translator and should not need readjust ed.

The front panel readings on the individual UHF Am plifier Trays m ay not be the sam e. Refer t o the

Test Dat a Sheet for your Translator to com pare t he final readings from the Factory wit h the

readings on each of t he Trays aft er t he Set Up. They should be very close t o t he sam e. I f a

reading is way off, refer t o t he Phasing and Power Adj ust m ent Procedure for t he UHF Am plifier

Trays in the Det ailed Alignm ent Procedure before trying t o adj ust .

I f a dum m y load is connect ed t o t he Translat or, swit ch t he Translator to Standby and swit ch t he

Main AC Circuit Breaker Off. Rem ove t he dum m y load and m ake all connect ions needed to connect

the Translator to t he Ant enna for your Syst em . Swit ch t he Main AC Circuit Breaker On and the

Operat e/ St andby Swit ch t o Operate. Adj ust t he Output Power screwdriver pot to att ain 100%

Out put.

I f the Translat or is already connect ed to t he Ant enna, check t hat the Out put is 100% . I f needed

adj ust the Power screwdriver pot .

I f a problem occurred during the Set - Up and Operation Procedure refer t o t he Detailed Alignm ent

Procedure of t he Translat or, which follows, for m ore inform at ion.

This com plet es t he Translat or Set- Up and Operat ion Procedure for t he 836A UHF Solid Stat e

Translat or. The Translat or can now be operat ed norm ally.