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Users browsing this forum: Google [Bot] , upsss and 4 guests. Leader distortion meter LDM Posted: Oct Thu 17, pm. Posted: Oct Fri 18, am. Haven't got one but I'd think there'd be audio at all times, matching the dial setting. Do you have a manual? They have it over at Elektrotanya, if you can manage the interface, or I can email it. Have manual thanks the range is 20cps to 20 kc but only one spot on dial emits tones. Maybe gain problem in oscillator, a bad cap or two or something else.
Chances are it's something minor. I really like Leader test equipment and use their FM stereo generator. I notice that the downloadable manual has no schematic, nor is it anywhere else around- have you got that? Hello, I was just curious Does the same symptom apply when the Distortion Function Switch is selected? So then, I take it that the output terminals on the LDM are to be used as a monitor output for viewing the distortion products on an oscilloscope.
The name says is all it measures distortion, but, you have to tune the meter to the frequency of the signal you're putting into it. Very similar unit it appears. That is strictly an audio instrument. The frequency range is 20Hz to 20kHz. You feed a clean sinewave into the audio amplifier being tested, and feed the amplifier output to the LDM. It does not know or care anything about RF.
For this to be meaningful, the RF into the receiver must be modulated with a clean sinewave. Alternatively you could feed a clean audio input directly to the amplifier section of the receiver, after disabling any audio coming from the receiver detector system. Bottom line is after a lot of kludging and jumper leads, it would tell you nothing. Good grief, you're right! I'm so used to having the generator incorporated in the unit I forgot that many don't have it.
I guess the first thing I'd do is measure a generator and look for one that's reasonably low to use as a test source. It definitely tells you more than nothing!
Posted: Oct Fri 18, pm. Remember to factor in it's residual distortion of. Then again, it can only measure to. I had one like it awhile back, but now I own a HPA. Posted: Nov Sat 19, am. Page 1 of 1. Previous topic Next topic. JPG hello anyone have one? Conrad Hoffman. Peter Bertini. It is a measuring device, not a generator. New Member. Conrad Hoffman wrote: Haven't got one but I'd think there'd be audio at all times, matching the dial setting.
Distortion Meter LDM-171
Leader LDM service manual. No instruction manual which i already have. Also i have schematics. Thank you, Kurt. Attached Files document
Product specs for Leader LDM-171
If you get stuck in repairing a defective appliance download this repair information for help. See below. Good luck to the repair! Please do not offer the downloaded file for sell only use it for personal usage! Looking for other manual? Document preview. No preview for this item!