I was just issued an Aeroflex 3920 service m0nitor yesterday. This is to replace a HP 8920A in the 8x8 foot screen room that I work in.
Does anyone else find that the fan is soo loud as to make the instrument almost unusable? I thought the HP was noisy but this is unbearable.
I may keep the HP for normal use and only turn on the screamer whei I need P25.
Aeroflex 3920
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Re: Aeroflex 3920
*sigh*
I'll forward this on to the appropriate people.
The problem is that it just takes so many watts to run all the DSPs/CPUs/YIGs/etc. it takes to do what a 3900 does - you have to move a lot of heat, and that means moving a lot of air.
You aren't alone on this (unfortunately). I cannot make any promises with respect to fixes or future designs until they are announced.
I'll forward this on to the appropriate people.
The problem is that it just takes so many watts to run all the DSPs/CPUs/YIGs/etc. it takes to do what a 3900 does - you have to move a lot of heat, and that means moving a lot of air.
You aren't alone on this (unfortunately). I cannot make any promises with respect to fixes or future designs until they are announced.
This is my opinion, not Aeroflex's.
I WILL NOT give you proprietary information. I make too much money to jeopardize my job.
I AM NOT the Service department: You want official info, manuals, service info, parts, calibration, etc., contact Aeroflex directly, please.
I WILL NOT give you proprietary information. I make too much money to jeopardize my job.
I AM NOT the Service department: You want official info, manuals, service info, parts, calibration, etc., contact Aeroflex directly, please.
Re: Aeroflex 3920
Am I missing something, or is there really no way to decode DTMF? I found the DTMF encode.
By the way, I borrowed a sound meter from the AV guys and at 1 ft from the front the 3920 is 70-72 db. The HP is 58-60 db.
By the way, I borrowed a sound meter from the AV guys and at 1 ft from the front the 3920 is 70-72 db. The HP is 58-60 db.
Re: Aeroflex 3920
We have the same noise issue with the Aeroflex 2975 - it is on the order of 10 dB noisier than either an 8920 or a G.D. 2670.
In a quiet confined space it will drive you bonkers. We have pretty much taken to using any other suitable instrument for daily work and only fire up the Aeroflex when one of its features is required.
In a quiet confined space it will drive you bonkers. We have pretty much taken to using any other suitable instrument for daily work and only fire up the Aeroflex when one of its features is required.
Re: Aeroflex 3920
I know what you mean. After two days playing with it I put the 8920 back and shoved the 3920 back under the bench.
When I took the monitor, I was under the impression that I would finally be able to test our UHF XTS radios in the Smartzone mode. It turns out that at this time only apco 25 trunking is offered.
We did not go with the 2975 or the GD 2670 because both were end of life products. Now we have 4 new 3920s.
I think they will be ok for site use since our sites already have so many fans going that you can barely talk on the phone.
When I took the monitor, I was under the impression that I would finally be able to test our UHF XTS radios in the Smartzone mode. It turns out that at this time only apco 25 trunking is offered.
We did not go with the 2975 or the GD 2670 because both were end of life products. Now we have 4 new 3920s.
I think they will be ok for site use since our sites already have so many fans going that you can barely talk on the phone.
Re: Aeroflex 3920
OK, let's see what I can do to help:
First, fan noise: Under utils, there is a setting for the thermostat that controls the fans. If you are in a reasonable environment you can turn the fans down (if you are out in a non-air-conditioned site you may need to leave them at full bore, but if you aren't sweating like a pig the instrument will be fine.)
Utils->Utils->Hardware Settings->Operational Status->Fan Control->Low
Second: DTMF decode. That's slated to go in either this next release or the next (unfortunately our Marketing types have a different set of priorities than you guys have: if you don't like it WRITE TO THEM! They set what we work on! *I* would have done that as one of the first things, but *they* didn't think it was as important.)
Third: Smartzone: I'm working as fast as I can on this, and that's all I can say on the subject (I'm waiting on a build right now....)
First, fan noise: Under utils, there is a setting for the thermostat that controls the fans. If you are in a reasonable environment you can turn the fans down (if you are out in a non-air-conditioned site you may need to leave them at full bore, but if you aren't sweating like a pig the instrument will be fine.)
Utils->Utils->Hardware Settings->Operational Status->Fan Control->Low
Second: DTMF decode. That's slated to go in either this next release or the next (unfortunately our Marketing types have a different set of priorities than you guys have: if you don't like it WRITE TO THEM! They set what we work on! *I* would have done that as one of the first things, but *they* didn't think it was as important.)
Third: Smartzone: I'm working as fast as I can on this, and that's all I can say on the subject (I'm waiting on a build right now....)
This is my opinion, not Aeroflex's.
I WILL NOT give you proprietary information. I make too much money to jeopardize my job.
I AM NOT the Service department: You want official info, manuals, service info, parts, calibration, etc., contact Aeroflex directly, please.
I WILL NOT give you proprietary information. I make too much money to jeopardize my job.
I AM NOT the Service department: You want official info, manuals, service info, parts, calibration, etc., contact Aeroflex directly, please.
Re: Aeroflex 3920
Wowbagger, thanks for your help. I will haul the box out and see if I can tame it. As it is it is really too noisy to use in my small room.
Re: Aeroflex 3920
THAT MADE A GREAT DIFFERENCE! It is still 6db louder than the HP at 65db but I can live with it.
As for DTMF decode, The only time we use it is to check the fire station alerting fallback but I found it amusing that such a basic function was omitted.
As for DTMF decode, The only time we use it is to check the fire station alerting fallback but I found it amusing that such a basic function was omitted.
Re: Aeroflex 3920
I have a new question regarding printers.
Using a standard Belkin IBM cable, I can not get it to see my desktop HP 6L.
Under networking it does not seem to let me print too an IP address.
Am I doing something wrong?
Using a standard Belkin IBM cable, I can not get it to see my desktop HP 6L.
Under networking it does not seem to let me print too an IP address.
Am I doing something wrong?
Re: Aeroflex 3920
Try
Utils->Hardware Settings->Printer configuration->Select new printer
(the actual printing is handled by CUPS)
See if adding the appropriate driver helps.
(I'm pushing to get Zeroconf support added to the system in general, which should help locating network printers.)
Utils->Hardware Settings->Printer configuration->Select new printer
(the actual printing is handled by CUPS)
See if adding the appropriate driver helps.
(I'm pushing to get Zeroconf support added to the system in general, which should help locating network printers.)
This is my opinion, not Aeroflex's.
I WILL NOT give you proprietary information. I make too much money to jeopardize my job.
I AM NOT the Service department: You want official info, manuals, service info, parts, calibration, etc., contact Aeroflex directly, please.
I WILL NOT give you proprietary information. I make too much money to jeopardize my job.
I AM NOT the Service department: You want official info, manuals, service info, parts, calibration, etc., contact Aeroflex directly, please.
Re: Aeroflex 3920
I already tried that before I spoke up. When you click on install printer it comes back "printer not installed".
The city forced me to do something productive so I will play with it again next week.
The city forced me to do something productive so I will play with it again next week.
Re: Aeroflex 3920
OK, I'll talk to the project lead Tuesday and see what we can come up with.
This is my opinion, not Aeroflex's.
I WILL NOT give you proprietary information. I make too much money to jeopardize my job.
I AM NOT the Service department: You want official info, manuals, service info, parts, calibration, etc., contact Aeroflex directly, please.
I WILL NOT give you proprietary information. I make too much money to jeopardize my job.
I AM NOT the Service department: You want official info, manuals, service info, parts, calibration, etc., contact Aeroflex directly, please.
Re: Aeroflex 3920
Aeroflex might want to look into new fan technologies. The SilenX brand moves lots of air at really low db.
http://www.silenx.com/index.asp
While I have not measured their noise levels, the one I have used in my computers are noticeably quieter than common off the shelf type fans.
http://www.silenx.com/index.asp
While I have not measured their noise levels, the one I have used in my computers are noticeably quieter than common off the shelf type fans.
Re: Aeroflex 3920
OK, if you are using a networked print server (CUPS server), you have to goGlennD wrote:I already tried that before I spoke up. When you click on install printer it comes back "printer not installed".
The city forced me to do something productive so I will play with it again next week.
Utils->Networking
and set the printer server IP address.
Then you have to go to the printer setup:
Utils->Printer setup
And select the type of connection.
For networking, you should be able to select a printer from the drop down and do an "install printer".
For a USB connection, you will have to tell the system what kind of printer it is.
This is my opinion, not Aeroflex's.
I WILL NOT give you proprietary information. I make too much money to jeopardize my job.
I AM NOT the Service department: You want official info, manuals, service info, parts, calibration, etc., contact Aeroflex directly, please.
I WILL NOT give you proprietary information. I make too much money to jeopardize my job.
I AM NOT the Service department: You want official info, manuals, service info, parts, calibration, etc., contact Aeroflex directly, please.
Re: Aeroflex 3920
Wowbagger, Thanks for your help. I do not think the par port works properly since I tried the HP laserjet 6L and a deskjet and two IBM cables. I have no USB printers available to me.
AT this point it does not matter since I have decided I can not live with the fans. In my 8x8 screen room I have a headache by the end of the day.
Most of the City of Long Beach is analog conventional with only the Gas dept as P25. We do have Smartzone mutual aid channels.
For almost all of my needs my HP 8920A will work fine. I will haul out the 3920 on a as needed basis.
We had to spend some grant money fast. If I had a demo to use for an extended period I would have voted for a different unit. All we had was the dog and pony show from GD and Aeroflex.
AT this point it does not matter since I have decided I can not live with the fans. In my 8x8 screen room I have a headache by the end of the day.
Most of the City of Long Beach is analog conventional with only the Gas dept as P25. We do have Smartzone mutual aid channels.
For almost all of my needs my HP 8920A will work fine. I will haul out the 3920 on a as needed basis.
We had to spend some grant money fast. If I had a demo to use for an extended period I would have voted for a different unit. All we had was the dog and pony show from GD and Aeroflex.
Re: Aeroflex 3920
Ah nice, more taxpayer dollars hardly working.
And a utility on P25?
And a utility on P25?
Re: Aeroflex 3920
Ten years ago Gas was a Syntor MDC600 system due for replacement. Since they had the money and we wanted to see how the then new P25 system worked they were our test.