Re: [Flexradio] Mute for SDR Receiver
Greetings Larry, Presently there is no hardware option to invoke the SDR-1000 receiver Mute function. In a previous posting on the reflector Eric1 made the suggestion of adding code for X2-12 to invoke the receiver mute. My offer is to provide an input on the Poor Man's Universal Control Board via an RCA jack with a connection to X2-12. Another option planned for the Poor Man's UCB is to permit an input to either X2-10 or X2-11 via a jumper for enabling an external foot/hand switch to toggle the PTT function of the SDR radio. X2-7 will be connected to an Optically Isolated MOSFET switch which will handle the necessary voltage and current for control of an external relay or switching of a Linear Amplifier. I am attaching the schematic design for the proposed Poor Man's UCB with this email posting, to view you will have to have ExpressPCB installed on your computer. 73's, Wally - M0ZAZ At 11:52 PM 12/15/2005 -0600, Larry Loen wrote: Wallace Watson wrote: HI All, To build on a previous suggestion by Eric1 that we add an external mute control line with X2-12, and that this mute will sequence the SDR software to mute the audio, protect the AGC and toggle the X2-7 exernal relay line, if enabled from the PowerSDR console, the exception would be to not put the radio into transmit. Thus you could control an external antenna switching relay and put another transmitter into transmit mode and not be concerned with damaging the front-end receiver input of the SDR. I will be happy to add an additional RCA jack to the Poor Man's Universal Control Board expecting a ground input to X2-12 if Eric1 wants to implement the necessary code to utilize the input. 73's, Wally - M0ZAZ I guess I need to understand this better. I was assuming that the various UCBs were going to trigger external relays, presumably via X2-12 in particular (that's the all-mode one, right?). The only issue there was how much current the X2 interface could take. I was assuming we'd have to buffer it in some fashion with a higher current discrete transistor or something. The rest I though was more or less already happening in the existing rig. Is there something I don't understand? The reason I ask is that I manually switch T/R today (without using the X2-12 at all, just externally key the coax switch by an electromagnetic relay). However, for reasons that seem obscure, sometimes the rig desenses. Is there something I don't know? Is the rig at risk? Except for the desense, seems to be working just fine. Larry WO0Z _ Wallace A. Watson - [EMAIL PROTECTED] _ PMUCB_12132005.sch Description: Binary data
Re: [Flexradio] Mute for SDR Receiver
HI All, To build on a previous suggestion by Eric1 that we add an external mute control line with X2-12, and that this mute will sequence the SDR software to mute the audio, protect the AGC and toggle the X2-7 exernal relay line, if enabled from the PowerSDR console, the exception would be to not put the radio into transmit. Thus you could control an external antenna switching relay and put another transmitter into transmit mode and not be concerned with damaging the front-end receiver input of the SDR. I will be happy to add an additional RCA jack to the Poor Man's Universal Control Board expecting a ground input to X2-12 if Eric1 wants to implement the necessary code to utilize the input. 73's, Wally - M0ZAZ At 02:21 PM 12/15/2005 +, [EMAIL PROTECTED] wrote: Good idea! Actually we should use the SDR PTT/MOX to control the external relay and transmitter via X2-7 as that will insure that the SDR is protected by the proper sequence of changeover. Time for the Universal Control Board. Then all the rigs can be properly selected and sequenced. Thank you, Jiri. 73, Larry K2LT From: Jiri Sanda [EMAIL PROTECTED] Date: 2005/12/14 Wed PM 09:43:17 WET CC: 'Flex Reflector' FlexRadio@flex-radio.biz Subject: Re: [Flexradio] Mute for SDR Receiver OK I really do not understand what for the MUTE is. If you want to transmit with other TX - OK just press PTT on the SDR and set the TX gain to 0 and you are all done. In any case you do NEED some external relay to take care of the antenna so why not for the PTT too ! 73 ! Jiri OK1RI On Wed, 14 Dec 2005, Jim Lux wrote: At 08:28 AM 12/14/2005, Larry W8ER wrote: Eric .. I would like to eliminate all other receivers from my ham shack. The Flex is the best. Occasionally I like to fire up an old boatanchor AM transmitter or something other than the Flex transmitter. I am looking for a way to mute the Flex receiver. Killing the audio is fairly simple but in doing so the Flex hears the big local signal and upon return to receive, the AGC has to recover and so forth. A good clean mute is what I am after. I think the confusion might be with what mute means, because I think most folks thought it meant shutting off the AF output, but what you mean is an RF mute, or at least one that freezes the AGC. Jim ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz _ Wallace A. Watson - [EMAIL PROTECTED] _
Re: [Flexradio] Mute for SDR Receiver
Wallace Watson wrote: HI All, To build on a previous suggestion by Eric1 that we add an external mute control line with X2-12, and that this mute will sequence the SDR software to mute the audio, protect the AGC and toggle the X2-7 exernal relay line, if enabled from the PowerSDR console, the exception would be to not put the radio into transmit. Thus you could control an external antenna switching relay and put another transmitter into transmit mode and not be concerned with damaging the front-end receiver input of the SDR. I will be happy to add an additional RCA jack to the Poor Man's Universal Control Board expecting a ground input to X2-12 if Eric1 wants to implement the necessary code to utilize the input. 73's, Wally - M0ZAZ I guess I need to understand this better. I was assuming that the various UCBs were going to trigger external relays, presumably via X2-12 in particular (that's the all-mode one, right?). The only issue there was how much current the X2 interface could take. I was assuming we'd have to buffer it in some fashion with a higher current discrete transistor or something. The rest I though was more or less already happening in the existing rig. Is there something I don't understand? The reason I ask is that I manually switch T/R today (without using the X2-12 at all, just externally key the coax switch by an electromagnetic relay). However, for reasons that seem obscure, sometimes the rig desenses. Is there something I don't know? Is the rig at risk? Except for the desense, seems to be working just fine. Larry WO0Z
Re: [Flexradio] Mute for SDR Receiver
Larry, Im confused about what you want. Are you looking for a way to hook one antenna up to multiple radios? (RX for some and TX for others?) Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Larry W8ER Sent: Tuesday, December 13, 2005 7:17 PM To: Flex Reflector Subject: [Flexradio] Mute for SDR Receiver Guy's I haven't found a nicer receiver than the one in the Flex. I have been wanting to use it with a couple of other transmitters and haven't found a way to mute the receiver during the transmit period. I guess anything that would lift the audio would work but it would not be a very elegant way to do it. Doing it that way would require the AGC to recover etc. I have noticed the software mute button on Power SDR but that would be cumbersome. I can't find anything in the documentation that points me in the right direction. Any ideas? --Larry W8ER
Re: [Flexradio] Mute for SDR Receiver
Eric .. I would like to eliminate all other receivers from my ham shack. The Flex is the best. Occasionally I like to fire up an old boatanchor AM transmitter or something other thanthe Flex transmitter. I am looking for a way to mute the Flex receiver. Killing the audio is fairly simple but in doing so the Flex hears the big local signal and upon return to receive, the AGC has to recover and so forth. A good clean mute is what I am after. Thanks Eric, --Larry - Original Message - From: Eric Wachsmann - FlexRadio To: 'Larry W8ER' ; 'Flex Reflector' Sent: Wednesday, December 14, 2005 11:09 AM Subject: RE: [Flexradio] Mute for SDR Receiver Larry, Im confused about what you want. Are you looking for a way to hook one antenna up to multiple radios? (RX for some and TX for others?) Eric Wachsmann FlexRadio Systems -Original Message-From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Larry W8ERSent: Tuesday, December 13, 2005 7:17 PMTo: Flex ReflectorSubject: [Flexradio] Mute for SDR Receiver Guy's I haven't found a nicer receiver than the one in the Flex. I have been wanting to use it with a couple of other transmitters and haven't found a way to mute the receiver during the transmit period. I guess anything that would lift the audio would work but it would not be a very elegant way to do it. Doing it that way would require the AGC to recover etc. I have noticed the software mute button on "Power SDR" but that would be cumbersome. I can't find anything in the documentation that points me in the right direction. Any ideas? --Larry W8ER
Re: [Flexradio] Mute for SDR Receiver
Eric, I, too, would like to mute the SDR receiver. Sometimes one has need to use a external transmitter separate from the SDR and the ability to mute the SDR receiver, ie, make it deaf during those transmissions, would be nice. 73, Dale AA5XE Eric Wachsmann - FlexRadio wrote: Larry, Im confused about what you want. Are you looking for a way to hook one antenna up to multiple radios? (RX for some and TX for others?) Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Larry W8ER Sent: Tuesday, December 13, 2005 7:17 PM To: Flex Reflector Subject: [Flexradio] Mute for SDR Receiver Guy's I haven't found a nicer receiver than the one in the Flex. I have been wanting to use it with a couple of other transmitters and haven't found a way to mute the receiver during the transmit period. I guess anything that would lift the audio would work but it would not be a very elegant way to do it. Doing it that way would require the AGC to recover etc. I have noticed the software mute button on "Power SDR" but that would be cumbersome. I can't find anything in the documentation that points me in the right direction. Any ideas? --Larry W8ER ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] Mute for SDR Receiver
Well, again, Im confused by your description because we already have a Mute feature that kills the audio without affecting the AGC. If youre saying that you need a way to do this via an external relay, then that is something that could be arranged in the software. You could hook one of the X2 inputs so that it asserts the Mute when it detects that it has gone high. Eric Wachsmann FlexRadio Systems -Original Message- From: Larry W8ER [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 10:28 AM To: [EMAIL PROTECTED]; 'Flex Reflector' Subject: Re: [Flexradio] Mute for SDR Receiver Eric .. I would like to eliminate all other receivers from my ham shack. The Flex is the best. Occasionally I like to fire up an old boatanchor AM transmitter or something other thanthe Flex transmitter. I am looking for a way to mute the Flex receiver. Killing the audio is fairly simple but in doing so the Flex hears the big local signal and upon return to receive, the AGC has to recover and so forth. A good clean mute is what I am after. Thanks Eric, --Larry - Original Message - From: Eric Wachsmann - FlexRadio To: 'Larry W8ER' ; 'Flex Reflector' Sent: Wednesday, December 14, 2005 11:09 AM Subject: RE: [Flexradio] Mute for SDR Receiver Larry, Im confused about what you want. Are you looking for a way to hook one antenna up to multiple radios? (RX for some and TX for others?) Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Larry W8ER Sent: Tuesday, December 13, 2005 7:17 PM To: Flex Reflector Subject: [Flexradio] Mute for SDR Receiver Guy's I haven't found a nicer receiver than the one in the Flex. I have been wanting to use it with a couple of other transmitters and haven't found a way to mute the receiver during the transmit period. I guess anything that would lift the audio would work but it would not be a very elegant way to do it. Doing it that way would require the AGC to recover etc. I have noticed the software mute button on Power SDR but that would be cumbersome. I can't find anything in the documentation that points me in the right direction. Any ideas? --Larry W8ER
Re: [Flexradio] Mute for SDR Receiver
Eric, The desired mute needs to be more than just the audio since the agc will get twanged badly. The objective, in addition to muting the audio is to have the RX up and running immediately upon release of the mute. It should, in addition to being a single hardware closure, work thru the CAT. Richard W5SXD Eric Wachsmann - FlexRadio [EMAIL PROTECTED] wrote: (12/14/2005 10:50) Well, again, I'm confused by your description because we already have a Mute feature that kills the audio without affecting the AGC. If you're saying that you need a way to do this via an external relay, then that is something that could be arranged in the software. You could hook one of the X2 inputs so that it asserts the Mute when it detects that it has gone high. Eric Wachsmann FlexRadio Systems -Original Message- From: Larry W8ER [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 10:28 AM To: [EMAIL PROTECTED]; 'Flex Reflector' Subject: Re: [Flexradio] Mute for SDR Receiver Eric .. I would like to eliminate all other receivers from my ham shack. The Flex is the best. Occasionally I like to fire up an old boatanchor AM transmitter or something other than the Flex transmitter. I am looking for a way to mute the Flex receiver. Killing the audio is fairly simple but in doing so the Flex hears the big local signal and upon return to receive, the AGC has to recover and so forth. A good clean mute is what I am after. Thanks Eric, --Larry - Original Message - From: Eric Wachsmann - mailto:[EMAIL PROTECTED] FlexRadio To: 'Larry W8ER' mailto:[EMAIL PROTECTED] ; 'Flex Reflector' mailto:FlexRadio@flex-radio.biz Sent: Wednesday, December 14, 2005 11:09 AM Subject: RE: [Flexradio] Mute for SDR Receiver Larry, I'm confused about what you want. Are you looking for a way to hook one antenna up to multiple radios? (RX for some and TX for others?) Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Larry W8ER Sent: Tuesday, December 13, 2005 7:17 PM To: Flex Reflector Subject: [Flexradio] Mute for SDR Receiver Guy's I haven't found a nicer receiver than the one in the Flex. I have been wanting to use it with a couple of other transmitters and haven't found a way to mute the receiver during the transmit period. I guess anything that would lift the audio would work but it would not be a very elegant way to do it. Doing it that way would require the AGC to recover etc. I have noticed the software mute button on Power SDR but that would be cumbersome. I can't find anything in the documentation that points me in the right direction. Any ideas? --Larry W8ER
Re: [Flexradio] Mute for SDR Receiver
At 08:28 AM 12/14/2005, Larry W8ER wrote: Eric .. I would like to eliminate all other receivers from my ham shack. The Flex is the best. Occasionally I like to fire up an old boatanchor AM transmitter or something other than the Flex transmitter. I am looking for a way to mute the Flex receiver. Killing the audio is fairly simple but in doing so the Flex hears the big local signal and upon return to receive, the AGC has to recover and so forth. A good clean mute is what I am after. I think the confusion might be with what mute means, because I think most folks thought it meant shutting off the AF output, but what you mean is an RF mute, or at least one that freezes the AGC. Jim
Re: [Flexradio] Mute for SDR Receiver
OK I really do not understand what for the MUTE is. If you want to transmit with other TX - OK just press PTT on the SDR and set the TX gain to 0 and you are all done. In any case you do NEED some external relay to take care of the antenna so why not for the PTT too ! 73 ! Jiri OK1RI On Wed, 14 Dec 2005, Jim Lux wrote: At 08:28 AM 12/14/2005, Larry W8ER wrote: Eric .. I would like to eliminate all other receivers from my ham shack. The Flex is the best. Occasionally I like to fire up an old boatanchor AM transmitter or something other than the Flex transmitter. I am looking for a way to mute the Flex receiver. Killing the audio is fairly simple but in doing so the Flex hears the big local signal and upon return to receive, the AGC has to recover and so forth. A good clean mute is what I am after. I think the confusion might be with what mute means, because I think most folks thought it meant shutting off the AF output, but what you mean is an RF mute, or at least one that freezes the AGC. Jim
Re: [Flexradio] Mute for SDR Receiver
Larry wants to use separate receivers and transmitters - possible different antennas for the receiver and transmitter. In this situation for protecting the receiver, it must be completely isolated from the antenna during the transmitting time by a good antenna relay, PIN diode switch or high voltage PhotoMOS switch. Also, for best protection the receiver antenna terminal should be shorted using same kind of devices. I have used NAIS or Panasonic PhotoMOS AQV204 that can stand 400 V and switches in less than 100 µs. See: http://www.datasheetarchive.com/semiconductors/pdfdatasheet.php?Datasheet=387760 Naturally, carefully designed sequencing and switch driver circuits will be needed. Still, due to switching transients a good RF mute may be necessary. 73, Ahti OH2RZ - Original Message - From: Jim Lux [EMAIL PROTECTED] To: Larry W8ER [EMAIL PROTECTED]; [EMAIL PROTECTED]; 'Flex Reflector' FlexRadio@flex-radio.biz Sent: Wednesday, December 14, 2005 11:16 PM Subject: Re: [Flexradio] Mute for SDR Receiver At 08:28 AM 12/14/2005, Larry W8ER wrote: Eric .. I would like to eliminate all other receivers from my ham shack. The Flex is the best. Occasionally I like to fire up an old boatanchor AM transmitter or something other than the Flex transmitter. I am looking for a way to mute the Flex receiver. Killing the audio is fairly simple but in doing so the Flex hears the big local signal and upon return to receive, the AGC has to recover and so forth. A good clean mute is what I am after. I think the confusion might be with what mute means, because I think most folks thought it meant shutting off the AF output, but what you mean is an RF mute, or at least one that freezes the AGC. Jim ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] Mute for SDR Receiver
Hi Jim, Yes, you are correct. I spoke with Eric on the landline earlier and was able to explain it more clearly to him. Sometimes email just doesn't do it as well as a phone call! I think he understands exactly what I was looking for and may be working on a simple implementation. I can't understand why someone else hasn't needed a "mute" function before this. -- Larry - Original Message - From: Jim Lux To: Larry W8ER ; [EMAIL PROTECTED] ; 'Flex Reflector' Sent: Wednesday, December 14, 2005 4:16 PM Subject: Re: [Flexradio] Mute for SDR Receiver At 08:28 AM 12/14/2005, Larry W8ER wrote: Eric .. I would like to eliminate all other receivers from my ham shack. The Flex is the best. Occasionally I like to fire up an old boatanchor AM transmitter or something other than the Flex transmitter. I am looking for a way to mute the Flex receiver. Killing the audio is fairly simple but in doing so the Flex hears the big local signal and upon return to receive, the AGC has to recover and so forth. A good clean mute is what I am after. I think the confusion might be with what "mute" means, because I think most folks thought it meant shutting off the AF output, but what you mean is an "RF" mute, or at least one that freezes the AGC.Jim
Re: [Flexradio] Mute for SDR Receiver
Eric has to consider the protection of the front end of the receiver when muting as I'm sure there is a max limit that can't be exceeded. My TEK analyzer says Max +20 dbm on the input. Cost me $2200 to get it fixed the last time I didn't pay attention. Any leakage data on the various antenna relays available? Larry K2LT From: Larry W8ER [EMAIL PROTECTED] Date: 2005/12/14 Wed PM 10:18:55 WET To: [EMAIL PROTECTED], 'Flex Reflector' FlexRadio@flex-radio.biz, Jim Lux [EMAIL PROTECTED] Subject: Re: [Flexradio] Mute for SDR Receiver Hi Jim, Yes, you are correct. I spoke with Eric on the landline earlier and was able to explain it more clearly to him. Sometimes email just doesn't do it as well as a phone call! I think he understands exactly what I was looking for and may be working on a simple implementation. I can't understand why someone else hasn't needed a mute function before this. -- Larry Larry Taft K2LT T and T Measurements drakerepair.com 800-687-9161 ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] Mute for SDR Receiver
The solution Larry and I discussed was an audio only fix that does not handle the RF side at all. We will be testing an Auto Mute function using X2-12 as an input. Grounding this input will assert the Mute function as it exists today. RF switching will need to be handled separately and should be considered carefully as others have noted that there _are_ reasonable limits (say what?) to what you can put into the SDR-1000 front end. I'll let the hardware experts talk about what those limits are. ;) Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 5:06 PM To: Larry W8ER; [EMAIL PROTECTED]; 'Flex Reflector'; Jim Lux Subject: Re: Re: [Flexradio] Mute for SDR Receiver Eric has to consider the protection of the front end of the receiver when muting as I'm sure there is a max limit that can't be exceeded. My TEK analyzer says Max +20 dbm on the input. Cost me $2200 to get it fixed the last time I didn't pay attention. Any leakage data on the various antenna relays available? Larry K2LT From: Larry W8ER [EMAIL PROTECTED] Date: 2005/12/14 Wed PM 10:18:55 WET To: [EMAIL PROTECTED], 'Flex Reflector' [EMAIL PROTECTED] radio.biz, Jim Lux [EMAIL PROTECTED] Subject: Re: [Flexradio] Mute for SDR Receiver Hi Jim, Yes, you are correct. I spoke with Eric on the landline earlier and was able to explain it more clearly to him. Sometimes email just doesn't do it as well as a phone call! I think he understands exactly what I was looking for and may be working on a simple implementation. I can't understand why someone else hasn't needed a mute function before this. -- Larry Larry Taft K2LT T and T Measurements drakerepair.com 800-687-9161
Re: [Flexradio] Mute for SDR Receiver
Eric, Make sure to allow the user to select if the input is a mute or an unmute by having a check box for the sex of the input. Richard W5SXD Eric Wachsmann - FlexRadio [EMAIL PROTECTED] wrote: (12/14/2005 17:28) The solution Larry and I discussed was an audio only fix that does not handle the RF side at all. We will be testing an Auto Mute function using X2-12 as an input. Grounding this input will assert the Mute function as it exists today. RF switching will need to be handled separately and should be considered carefully as others have noted that there _are_ reasonable limits (say what?) to what you can put into the SDR-1000 front end. I'll let the hardware experts talk about what those limits are. ;) Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 5:06 PM To: Larry W8ER; [EMAIL PROTECTED]; 'Flex Reflector'; Jim Lux Subject: Re: Re: [Flexradio] Mute for SDR Receiver Eric has to consider the protection of the front end of the receiver when muting as I'm sure there is a max limit that can't be exceeded. My TEK analyzer says Max +20 dbm on the input. Cost me $2200 to get it fixed the last time I didn't pay attention. Any leakage data on the various antenna relays available? Larry K2LT From: Larry W8ER [EMAIL PROTECTED] Date: 2005/12/14 Wed PM 10:18:55 WET To: [EMAIL PROTECTED], 'Flex Reflector' [EMAIL PROTECTED] radio.biz, Jim Lux [EMAIL PROTECTED] Subject: Re: [Flexradio] Mute for SDR Receiver Hi Jim, Yes, you are correct. I spoke with Eric on the landline earlier and was able to explain it more clearly to him. Sometimes email just doesn't do it as well as a phone call! I think he understands exactly what I was looking for and may be working on a simple implementation. I can't understand why someone else hasn't needed a mute function before this. -- Larry Larry Taft K2LT T and T Measurements drakerepair.com 800-687-9161 ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] Mute for SDR Receiver
Meaning the polarity of the switch? I didn't implement that in my first pass, but that's a simple thing to add if necessary. Eric Wachsmann FlexRadio Systems -Original Message- From: richard allen [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 5:47 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED]; 'Larry W8ER'; 'Flex Reflector'; 'Jim Lux' Subject: Re: [Flexradio] Mute for SDR Receiver Eric, Make sure to allow the user to select if the input is a mute or an unmute by having a check box for the sex of the input. Richard W5SXD Eric Wachsmann - FlexRadio [EMAIL PROTECTED] wrote: (12/14/2005 17:28) The solution Larry and I discussed was an audio only fix that does not handle the RF side at all. We will be testing an Auto Mute function using X2-12 as an input. Grounding this input will assert the Mute function as it exists today. RF switching will need to be handled separately and should be considered carefully as others have noted that there _are_ reasonable limits (say what?) to what you can put into the SDR-1000 front end. I'll let the hardware experts talk about what those limits are. ;) Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 5:06 PM To: Larry W8ER; [EMAIL PROTECTED]; 'Flex Reflector'; Jim Lux Subject: Re: Re: [Flexradio] Mute for SDR Receiver Eric has to consider the protection of the front end of the receiver when muting as I'm sure there is a max limit that can't be exceeded. My TEK analyzer says Max +20 dbm on the input. Cost me $2200 to get it fixed the last time I didn't pay attention. Any leakage data on the various antenna relays available? Larry K2LT From: Larry W8ER [EMAIL PROTECTED] Date: 2005/12/14 Wed PM 10:18:55 WET To: [EMAIL PROTECTED], 'Flex Reflector' [EMAIL PROTECTED] radio.biz, Jim Lux [EMAIL PROTECTED] Subject: Re: [Flexradio] Mute for SDR Receiver Hi Jim, Yes, you are correct. I spoke with Eric on the landline earlier and was able to explain it more clearly to him. Sometimes email just doesn't do it as well as a phone call! I think he understands exactly what I was looking for and may be working on a simple implementation. I can't understand why someone else hasn't needed a mute function before this. -- Larry Larry Taft K2LT T and T Measurements drakerepair.com 800-687-9161 ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
Re: [Flexradio] Mute for SDR Receiver
Meaning in one setting grounding the pin will mute. In the other, grounding the pin will unmute. Some radios had an enable; others had a mute. I assume the pin has a pullup resistor? -Original Message- From: Eric Wachsmann - FlexRadio [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 5:49 PM To: 'richard allen' Cc: [EMAIL PROTECTED]; 'Larry W8ER'; 'Flex Reflector'; 'Jim Lux' Subject: RE: [Flexradio] Mute for SDR Receiver Meaning the polarity of the switch? I didn't implement that in my first pass, but that's a simple thing to add if necessary. Eric Wachsmann FlexRadio Systems -Original Message- From: richard allen [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 5:47 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED]; 'Larry W8ER'; 'Flex Reflector'; 'Jim Lux' Subject: Re: [Flexradio] Mute for SDR Receiver Eric, Make sure to allow the user to select if the input is a mute or an unmute by having a check box for the sex of the input. Richard W5SXD Eric Wachsmann - FlexRadio [EMAIL PROTECTED] wrote: (12/14/2005 17:28) The solution Larry and I discussed was an audio only fix that does not handle the RF side at all. We will be testing an Auto Mute function using X2-12 as an input. Grounding this input will assert the Mute function as it exists today. RF switching will need to be handled separately and should be considered carefully as others have noted that there _are_ reasonable limits (say what?) to what you can put into the SDR-1000 front end. I'll let the hardware experts talk about what those limits are. ;) Eric Wachsmann FlexRadio Systems -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 14, 2005 5:06 PM To: Larry W8ER; [EMAIL PROTECTED]; 'Flex Reflector'; Jim Lux Subject: Re: Re: [Flexradio] Mute for SDR Receiver Eric has to consider the protection of the front end of the receiver when muting as I'm sure there is a max limit that can't be exceeded. My TEK analyzer says Max +20 dbm on the input. Cost me $2200 to get it fixed the last time I didn't pay attention. Any leakage data on the various antenna relays available? Larry K2LT From: Larry W8ER [EMAIL PROTECTED] Date: 2005/12/14 Wed PM 10:18:55 WET To: [EMAIL PROTECTED], 'Flex Reflector' [EMAIL PROTECTED] radio.biz, Jim Lux [EMAIL PROTECTED] Subject: Re: [Flexradio] Mute for SDR Receiver Hi Jim, Yes, you are correct. I spoke with Eric on the landline earlier and was able to explain it more clearly to him. Sometimes email just doesn't do it as well as a phone call! I think he understands exactly what I was looking for and may be working on a simple implementation. I can't understand why someone else hasn't needed a mute function before this. -- Larry Larry Taft K2LT T and T Measurements drakerepair.com 800-687-9161 ___ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
[Flexradio] Mute for SDR Receiver
Guy's I haven't found a nicer receiver than the one in the Flex. I have been wanting to use it with a couple of other transmitters and haven't found a way to mute the receiver during the transmit period. I guess anything that would lift the audio would work but it would not be a very elegant way to do it. Doing it that way would require the AGC to recover etc. I have noticed the software mute button on "Power SDR" but that would be cumbersome. I can't find anything in the documentation that points me in the right direction. Any ideas? --Larry W8ER
