Kenwood TS-990S Service Manual

Also see for SP-990: Instruction manual

Contents

TS-990S183ADJUSTMENTItem ConditionMeasurement AdjustmentSpecifications/RemarksTest-equipment Unit Terminal Unit Parts Method23. SUB RX NBvoltage1) Menu No.: 65 (14.2MHz, CW)SUB P.AMP: ONSUB NB1: ONAGC: FASTSSG f.: 14.200MHzSSG output: –103dBm(1.58μV)DVMSSGOscillo-scopeAF VMDM.SPNoise G.TX-RX(A/2)TX-RX(B/2)CN200TP11(NB)TX-RX(B/2)L885L887L888Voltage min.Repeat adjust for 2to 3 times.3.9V or less24. OPTICALI/O Check1) Menu No.: 112 (14.1MHz,USB)Mode: USBConnect between the OPTI-CAL IN terminal and OPTI-CAL OUT terminal using thecable.Check that a 1kHzsound emerges fromthe internal speaker.25. EXT REFI/OCheck1) Menu No.: 1 (14.2MHz, USB)SSG f.: 10MHzSSG output: 0dBm (224mV)Connect the cables to theREF I/O (10MHz) terminalfrom the SSG.After the check, disconnectthe cable from the REF I/O(10MHz) terminal.SSG RearpanelREF I/O(10MHz)Check the maindisplay.“ERDET: 1” appears on themain display.26. MAINRX AGCstart level(2.7kHz)1) Menu No.: 9 (14.2MHz, USB)P.AMP: ONFIL/SEL(M): 2.7kHzAGC: OFFSSG f.: 14.201MHzSSG output: –110dBm(0.707μV)SSG RearpanelANT 1 Frontpanel[UP]/[+](F5) or[DOWN]/[-](F4)Using the [UP]/[+](F5) or [DOWN]/[-](F4) key, adjust tothe point when “A/Ddata” displays “1” forthe fi rst time.27. MAIN RXAGC startlevel (500Hz)1) Menu No.: 10 (14.2MHz,USB)P.AMP: ONFIL/SEL(M): 500HzAGC: OFFSSG f.: 14.201MHzSSG output: –110dBm(0.707μV)28. MAIN RXAGC startlevel (270Hz)1) Menu No.: 11 (14.2MHz,USB)P.AMP: ONFIL/SEL(M): 270HzAGC: OFFSSG f.: 14.201MHzSSG output: –110dBm(0.707μV)