LE ADERITESTIINSTRUMENTS DE. MODEL LDM DISTORTION METER. OPERATING INSTRUCTIONS. PITON. TEISIN DS3rtso. LEADER ELECTRONICS . I’m looking for a LEADER LDM distortion meter service manual. to you, if you need this, is a service manual of LDM distortion meter. Path: /leader/ldm/. This is the These manuals are available for download and free of charge. Manual for the Leader Model LDM Distortion Meter.

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Users browsing this forum: Google [Bot]Majestic [Bot] and 9 guests. Dec Manuao 31, Leader distortion meter LDM Oct Thu 17, Oct Fri 18, 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.

Oct Fri 18, 1: Maybe gain problem in oscillator, a bad cap or two kdm-171 something else.

Antique Radio Forums • View topic – Leader distortion meter LDM

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? I didn’t see Peter Bertini’s post while I was typing my original reply above.


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. Oct Fri 18, 3: 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. Oct Fri 18, 4: That is strictly an audio instrument.

Leader Audio Equipment

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. Here’s a one-page catalog sheet with specs: 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. Oct Fri 18, 5: 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! 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. Nov Sat 19, 6: Books Support This Site: Page 1 of 1. Previous topic Next topic. Leader distortion meter LDM Posted: JPG hello anyone lsader one? It is a measuring device, not a generator.