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OPERATIONAL CHECK. Continued - TM-11-5820-890-30-5_248
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TM-11-5820-890-30-5 Ground Non-Icom Radio Sets Consisting of: Receiver-Transmitter Radio RT-1439/VRC (NSN 5896-01-195-0827) Manual
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OPERATIONAL CHECK. Continued - TM-11-5820-890-30-5_250


TM 11-5820-890-30-5 3-17. OPERATIONAL CHECK. Continued Step 11. RF SECTION TEST. CONNECT: Signal  generator  output  to  UUT  ANT  connector, and  scope  channel  1  input  to  RF  DET  connector using  mini  probe  tip  adapter  and  X10  probe. DISCONNECT: DMM. NOTE: If  any  RF  SECTION  TEST  fails,  check  all  internal  RF  cable,  attenuator, and  relay  connections  for  tightness  prior  to  entering  the  appropriate chart.  If  any  connections  are  loose,  tighten  them  and  retest. SET: Signal  generator: Test  adapter: FREQ: 30  MHz 28  V:  ON. LEVEL: 0 dBm MODULATION:  OFF. Action a.  Measure  output  of  RF  DET  connector  on scope. b.   Set   test   adapter: RF  SWITCH:  1. c.  Connect  scope  channel  1  input  to FREQ CNTR connector using impedance matching  setup,  shown  below. Response a.  Scope  channel  1  displays  a  signal  which is  0  mV  p-p  (-10  to  10  mV  p-p).  If  not, go  to  chart  14. b.  Scope  channel  1  displays  a  560  to  700 mV  p-p  signal.  If  not,  go  to  chart  15. c.  No  response. 3-38


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