Motorola R-2001A User Manual (English)

Questions and Answers:

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Gary DanielsAug 21, 2025
What to do if Motorola R-2001A frequency counter is inoperative?
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  nandersonAug 21, 2025
  If the frequency counter on your Motorola Measuring Instruments isn't working, begin by checking for a 1 kHz signal at TP9 of the Audio Synthesizer (A6). If it's absent, verify the 10 MHz signal from the Frequency Standard module (A13) to the RF Synthesizer (A5). If the 10 MHz signal is present, replace the RF Synthesizer. Otherwise, replace the Frequency Standard module. If the 1 kHz signal is present, check for the signal to be counted at pins 61 and 63 of the Processor I/O module (A7). If it's missing, replace the Front Panel Interface Module (A12). If the signal is good up to the Processor I/O module, replace that module.
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Jennifer WrightAug 22, 2025
What to do if there is no vertical display on Motorola R-2001A?
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  David HenryAug 22, 2025
  If there's no vertical display on your Motorola Measuring Instruments, check for the input signal at TP4 of the Scope Amplifier module (A2). If the signal is absent, replace the Front Panel Interface module (A12). If the signal is present at TP4, replace the Scope Amplifier module (A2).
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Shawn GarrettAug 25, 2025
What to do if Motorola R-2001A Measuring Instruments shows no AC indication and no Oven Ready indication?
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  Andrea RogersAug 25, 2025
  If your Motorola Measuring Instruments displays no AC or Oven Ready indication, check the AC linecord and line fuse. If the system powers up normally when on, replace the AC LED. Also, check for approximately +15 VDC at E13 of the A13 module. If it's not present, replace the Low Voltage Power Supply (A1). Finally, check E11 of A13 for +9 VDC and E12 for approximately +7.5 VDC. If E12 is 0 VDC, replace the LED. If the +9 VDC is not present on E11 replace A13.
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Bryan JonesAug 27, 2025
What to do if Motorola R-2001A system turns on, but there is no display?
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  Justin LongAug 27, 2025
  If your Motorola Measuring Instruments system powers on but shows no display, verify the presence of high voltage by connecting the CRT anode lead and arcing it to the chassis. If there is no arc, replace the high voltage supply. If the high voltage supply is working, replace the CRT.
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Debra MooreAug 28, 2025
How to fix no DPL (modulation) signal on CRT of Motorola R-2001A?
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  Christopher MillsAug 28, 2025
  To resolve the absence of a DPL signal on the CRT of your Motorola Measuring Instruments, first check TP1 of the Audio Synthesizer for the presence of the DPL signal. If it's not there, replace the Audio Synthesizer module. If the signal is still absent, check for the DPL signal on pin 64 of the Audio Synthesizer. If it's not present, replace the IEEE Interface module (A8), or check for the presence of the jumpers on J8 for the standard unit.
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Gary Anderson DDSAug 29, 2025
How to fix no external modulation on the CRT of Motorola R-2001A?
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  collinslaurenAug 29, 2025
  To troubleshoot the absence of external modulation on the CRT of your Motorola Measuring Instruments, start by checking for a modulation signal at TP7 of the Audio Synthesizer module (A6). If it's not present, replace the Audio Synthesizer module. If the signal is still missing, check for the modulation signal on pin 66 of the Audio Synthesizer. If it's not present, replace the IEEE Interface module (A8), or check for the presence of the modulation jumpers on J8 for the standard unit.
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hbradleyAug 31, 2025
How to fix Motorola R-2001A DVM AC mode when it is inoperative?
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  Carrie WoodsAug 31, 2025
  If the DVM AC mode on your Motorola Measuring Instruments is not working, check for the DVM signal at pin 22 of the Processor Interface module (A12). If it's not present, replace the Front Panel Interface module. Also, check for short bursts of the DVM AC signal at TP8 of the Scope/DVM Control module (A3).
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williamsjamesSep 2, 2025
What to do if Motorola R-2001A DVM DC mode is inoperative?
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  Michael LawrenceSep 2, 2025
  If the DVM DC mode is inoperative on your Motorola Measuring Instruments, check for the DC input level attenuated by factors of 10 to less than 1 volt at pin 22 of the Front Panel Interface module (A12). If it's not present or if it's greater than 1 volt, replace the Front Panel Interface module.
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Mary HuffmanSep 4, 2025
What to do if Motorola Measuring Instruments has no horizontal sweep?
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  Chris CastanedaSep 4, 2025
  If your Motorola Measuring Instruments shows no horizontal sweep, check for a voltage level between -2.0 VDC and +2.0 VDC at TP4 of the Scope Amplifier module (A2). If the voltage cannot be brought within range with either the vertical range attenuator or the vertical position control, replace the Front Panel Interface module (A12). If the voltage at TP4 is okay, replace the Scope Amplifier module (A2).
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julieandersonSep 5, 2025
How to troubleshoot Motorola R-2001A Measuring Instruments SINAD meter when it is inoperative?
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  jasonforbesSep 6, 2025
  To troubleshoot an inoperative SINAD meter on your Motorola Measuring Instruments, first verify that the DVM mode is functioning correctly. If the DVM mode checks okay, replace the Scope/DVM Control module (A3).