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DJP126

First, the oscillator module contains its own 9 volt supply to the oscillator. As soon as the unit is connected to a power source, voltage is applied to the oscillator. Second, your problems seem to be intermittent. If so, I suspect that the connectors from the front panel flex circuits to the mothe...

DJP126

Try changing the spec. anal. display to 100Mhz/div. It's been a very long time since I've seen a 2660 but I seem to recall that it had an "extended" capability on the spectrum analyzer. When in that "extended" setting, the processor would slow down tremendously.

DJP126

Just a WAG (Wild Ass Guess), did you try cal:eeprom:ifbw0:300 ?

DJP126

They are the same boards. Motorola changes the suffix of the model numbers when there are major changes to that unit. This might be due to component changes, feature or option additions or even major rewrites of system firmware. In this particular case, the changes between the "B" and &quo...

DJP126

Sorry I can't help much with this, but I can offer some additional info for you. The RF board and Logic board numbers starting with 84D80.... are the factory part numbers for the raw circuit boards (no components installed). The "HLB" and "HLN" numbers are the numbers for the RF ...

DJP126

Sounds decent to me. Keep in mind, the CRTs are NLA so keep the intensity down when not in use.

DJP126

Whenever Motorola makes a suffix change, "A" to "B" to "C" etc. it is due to a "major" engineering change. This change may be for component & circuit changes (due to a component becoming NLA from the supplier), added features requiring a rewrite to firmwar...

DJP126

Motorola never had a service manual for the R2400 series. What they provided was the R2200 service manual with addendums for the module differences between the R2200 & R2400. Also the service manual on repeater-builder is for the R2200A.

DJP126

Hi question Can one add a Spectrum Analyzer be added to a R2200B with an option card. I don't know so asking. If it is possible. Thanks. It can be done but not worth it. Although the R2200 and R2400 LOOK identical, the front panel and the RF I/O module are different. You would also have to get the ...

DJP126

Yes it is. That "screw" is a dust cover so don't lose it.

DJP126

Sold as used after trade-in.

DJP126

The /U in the model # signifies that the analyzer was traded in, repaired, calibrated and sold as used.

DJP126

Is that .800 KHz error across the entire spectrum or does the error change by frequency band (Low band, high band, UHF, 800 MHz)? If it changes by band, the master oscillator could be off slightly. As for the fluctuations, you might be overdriving the receiver. Try adding some attenuation.

DJP126

I have to agree with Bernie, special function 79 should solve your problem. Bernie and I both worked on these analyzers for Motorola.

DJP126

You also might want to be sure that the three ribbon connectors are connected properly. Also your problem MIGHT be on the HVPS, there is a circuit that acts as a closed loop in the two supplies that, if bad, can cause your symptom.

DJP126

The service manual is also the operating manual.

DJP126

Sorry, my error. Spcl fctn 99 gives you firmware version. 79 is the NVM reset. Guess I AM getting old.

DJP126

Try re-setting the NVM using special function 99. To do this, press Both cursor arrows on the keypad at the same time, then the #9 twice.

DJP126

IIRC the BFO control is a simple 5K pot, no switch to it. Motorola P/N 18-80346A14. Probably NLA.

DJP126

Don't know what you are talking about. I see MSI closed at $70.31 up $0.65 or +0.83%. Also your link above shows an error.

DJP126

Classified

DJP126

Sorry but, I'm looking at the serial # sticker as I write this. https://drive.google.com/drive/folders/0B5n-f3Yxc7GBclhxdkt6TUw3OUU I used to work for Motorola in the Test Equipment Service Depot since before the first R-2001A was built to past the last of the R2000D series was sold, so believe me ...

DJP126

Can anyone enlighten me on what the "I" in the model identifier "R2015DIHS" stands for or what this model does differently? There was no such designation. That model would have originally been....R-2015D/HS ....which would be the R2001D analyzer with the type 1 trunking option, ...

DJP126

The repeater builder site has a pdf file on the R2000D series here.

http://www.repeater-builder.com/test-eq ... manual.pdf

DJP126

Just an FYI for all but good to remember......Whenever a Motorola model number has a suffix change (A to B, B to C, etc.) there was a major design change, component change, firmware/software change or a combination f those changes. The ONLY exception that I have ever seen to this was when they chang...

DJP126

Yes the R2400A uses the R2200B maintenance manual with a small supplement added. However NOTICE that it is the R2400A & R2200B and NOT the R2200A. IF you compare the R2200A manual and the R2200B manual, module to module, you WILL SEE MORE differences than you realize. For instance, the receiver ...

DJP126

The bottom line on the right side display is missing many segments. This problem has been intermittent for a while. This time it looks like it will not correct its self. I have a R2200A that has some old age problems. Can some of the R2200 parts be moved to the R2400? If so which ones and what is i...

DJP126

N = numeric T = Tone only A = Alpha numeric

DJP126

Guys, you won't find a commercial # for the CRT as Motorola had it manufactured specifically for the R2000 series. No other piece of equipment uses that CRT. Also those "chopped" rotation coil wires you have, came from the factory on the "A", "B" and "C" serie...

DJP126

Lynn,

This should make things easier.

http://www.repeater-builder.com/test-eq ... 9e84-o.pdf

DJP126

I had a similar trace "fading" problem on my R2001B. A touch-up of the Intensity Limit and Intensity Balance pots on the A2 card fixed it right up. Unfortunately my unit is still suffering from almost unreadable (extremely dim) text but quite decent (bright and clear) swept traces. All co...

DJP126

Hello Lynn and welcome to the board. M name is Dave and I used to service the R2000 series for Motorola's test equipment depot. As for your spectrum analyzer problem, I think you are correct with your diagnosis, keep looking at the scope/dvm board. As for the rest of the problems, I think most of th...

DJP126

That LM7812 on your HVPS is NOT a factory mod. What are the symptoms of your problem with the analyzer?

DJP126

If by the Dev measurement you mean in receive mode, look at the rcvr alignment, if you mean generate mode that would be the rf synth or possibly the scope/DVM control board.

DJP126

Try swapping out the VCO or power amp modules.

DJP126

That happens when you Lazarus a four year old thread.

DJP126

Dave: I remembered the questions I wanted to ask you. 1. My R2001B constantly sounds the alarm beep in Wideband monitor mode as soon as the squelch opens. The deviation alarm is set to 99.9 kHz. I tried setting it to 00.0 kHz and that makes it sound all the time. I can't seem to turn it off complet...

DJP126

Per the R2001A maintainence manual, the filament is 6.3 VAC. As the same tube was used in all models, it should be the same for all.

DJP126

I would suspect a problem in the RF I/O.

DJP126

The R2600 series stores two calibration tables for front end temperature compensation. That is why you saw the warning about 20 minutes after calibrating. At the service center after all repairs and calibrations were completed, we would shut the unit down to allow it to get "cold" When we ...

DJP126

Movig from 465 to 440 won't happen. That's way too far off. You need a different rcvr board in that pager.

DJP126

As far as I know, they are just different revisions with the 'E' being the newer one. If you ever want to sell one, shoot me a message. -AJ That is correct. Motorola would change the part number suffix when there was a major engineering change. The difference here was the "E" version has ...

DJP126

Back in the 70's I had joined a local Civil Defense agency (today they call it FEMA). I purchased a portable (HT200) and mobile (Mocom 35). Later on I discovered that I was the factory tech that originally tested that Mocom 35!

DJP126

Are the attenuators repairable? Yes they are. We used to repair (internally owned) monitor attenuators all the time but you needed other bad attenuators to canaballize the parts from. Your best bet is to try to find a new attenuator. IIRC the attenuators came from a company called RLC but I have no ...

DJP126

Schaumburg campus is for sale!

Story is here, http://www.dailyherald.com/article/2015 ... 150919193/

DJP126

Check the transistors that the heat sinks are mounted to. These are your final deflection amps for vertical and horizontal deflection.

DJP126

Most likely a connection problem between the flex connectors and the motherboard.

DJP126

Your problem is in the wideband amplifier section of the RF I/O module.

DJP126

Your problem is not likely just a cal problem. We used the gain and offset adjustments to balance the DC voltages between a 10X gain in wattage (we commonly used 5W and 50W RF in). The different reading accuracy between UHF & VHF is USUALLY caused by a bad impedance between the frequencies. Most...

DJP126

Greetings. Got an R2001C that has an issue with the Low Voltage Power Supply. The issue is that there appears to be a short somewhere in the supply itself. I have replaced all of the electrolytic caps, rectifier diodes, and even the 2N6436 transistors on the switching board. The problem is within t...

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