[arrl-odv:24099] Inaccurate/Misleading Article in April QST
I am disappointed in the article titled "Untangling Digital Voice Above 50 MHz" as it has multiple inaccuracies. The table on page 31 shows that Yaesu Fusion and D-Star are "Analog FM Compatible" while DMR, NXDN, and P25 are not. Further, the third paragraph on page 32 begins, "In contrast, P25, NXDN, and DMR transceivers are digital only." While I don't have any experience with NXDN, I own several DMR portables and about a dozen P25 radios. The DMR and P25 transceivers are absolutely capable of analog FM operation and I regularly use them on analog FM repeaters. Thirty seconds of Googling confirmed that the NXDN radios are likewise analog FM capable. Further, excluding D-Star, the repeaters for all of the digital modes are capable of digital or analog operation. The P25 repeaters for example can be set to retransmit analog as analog and digital as digital. We have a network of VHF P25 repeaters in my county that are set up to individually repeat analog FM signals and repeat P25 signals across the entire network. Another row in the table on page 31 indicates if the radios are "Front Panel Programmable". Again it shows Yaesu Fusion and D-Star as yes and DMR, NXDN, and P25 as no. This is again incorrect. Several of my P25 radios are front panel programmable. While my DMR radios are not FPP, there is readily available firmware for at least one brand to make them FPP. Yet another row incorrectly indicates that there are not P25 dual band models. Motorola and Harris both produce multiband radios. These are just the most glaring inaccuracies that jumped out at me. Was this article an April Fools joke? Doug K4AC
Doug, you are absolutely correct that both ICOM's and Kenwood's (NexEdge) versions of NXDN are analog-compatible. The technology isn't at all new and it had to be that flexible to be backward compatible with analog Part 90 systems when it was first marketed as a joint project between the two companies. I have taught seminars at IWCE conventions on the subject. 73, Chris W3KD Sent from my iPhone
On Mar 20, 2015, at 1:00 PM, Doug Rehman <doug@k4ac.com> wrote:
I am disappointed in the article titled “Untangling Digital Voice Above 50 MHz” as it has multiple inaccuracies.
The table on page 31 shows that Yaesu Fusion and D-Star are “Analog FM Compatible” while DMR, NXDN, and P25 are not. Further, the third paragraph on page 32 begins, “In contrast, P25, NXDN, and DMR transceivers are digital only.”
While I don’t have any experience with NXDN, I own several DMR portables and about a dozen P25 radios. The DMR and P25 transceivers are absolutely capable of analog FM operation and I regularly use them on analog FM repeaters. Thirty seconds of Googling confirmed that the NXDN radios are likewise analog FM capable. Further, excluding D-Star, the repeaters for all of the digital modes are capable of digital or analog operation. The P25 repeaters for example can be set to retransmit analog as analog and digital as digital. We have a network of VHF P25 repeaters in my county that are set up to individually repeat analog FM signals and repeat P25 signals across the entire network.
Another row in the table on page 31 indicates if the radios are “Front Panel Programmable”. Again it shows Yaesu Fusion and D-Star as yes and DMR, NXDN, and P25 as no. This is again incorrect. Several of my P25 radios are front panel programmable. While my DMR radios are not FPP, there is readily available firmware for at least one brand to make them FPP.
Yet another row incorrectly indicates that there are not P25 dual band models. Motorola and Harris both produce multiband radios.
These are just the most glaring inaccuracies that jumped out at me.
Was this article an April Fools joke?
Doug K4AC
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Thanks, Doug. I will pass your observations along to Steve Ford. 73, Dave K1ZZ/3 in DC ________________________________________ From: arrl-odv [arrl-odv-bounces@reflector.arrl.org] on behalf of Imlay, Chris, W3KD Sent: Friday, March 20, 2015 1:25 PM To: Rehman, Doug, K4AC Cc: arrl-odv Subject: [arrl-odv:24100] Re: Inaccurate/Misleading Article in April QST Doug, you are absolutely correct that both ICOM's and Kenwood's (NexEdge) versions of NXDN are analog-compatible. The technology isn't at all new and it had to be that flexible to be backward compatible with analog Part 90 systems when it was first marketed as a joint project between the two companies. I have taught seminars at IWCE conventions on the subject. 73, Chris W3KD Sent from my iPhone On Mar 20, 2015, at 1:00 PM, Doug Rehman <doug@k4ac.com<mailto:doug@k4ac.com>> wrote: I am disappointed in the article titled “Untangling Digital Voice Above 50 MHz” as it has multiple inaccuracies. The table on page 31 shows that Yaesu Fusion and D-Star are “Analog FM Compatible” while DMR, NXDN, and P25 are not. Further, the third paragraph on page 32 begins, “In contrast, P25, NXDN, and DMR transceivers are digital only.” While I don’t have any experience with NXDN, I own several DMR portables and about a dozen P25 radios. The DMR and P25 transceivers are absolutely capable of analog FM operation and I regularly use them on analog FM repeaters. Thirty seconds of Googling confirmed that the NXDN radios are likewise analog FM capable. Further, excluding D-Star, the repeaters for all of the digital modes are capable of digital or analog operation. The P25 repeaters for example can be set to retransmit analog as analog and digital as digital. We have a network of VHF P25 repeaters in my county that are set up to individually repeat analog FM signals and repeat P25 signals across the entire network. Another row in the table on page 31 indicates if the radios are “Front Panel Programmable”. Again it shows Yaesu Fusion and D-Star as yes and DMR, NXDN, and P25 as no. This is again incorrect. Several of my P25 radios are front panel programmable. While my DMR radios are not FPP, there is readily available firmware for at least one brand to make them FPP. Yet another row incorrectly indicates that there are not P25 dual band models. Motorola and Harris both produce multiband radios. These are just the most glaring inaccuracies that jumped out at me. Was this article an April Fools joke? Doug K4AC _______________________________________________ arrl-odv mailing list arrl-odv@reflector.arrl.org<mailto:arrl-odv@reflector.arrl.org> https://reflector.arrl.org/mailman/listinfo/arrl-odv
participants (3)
-
Chris Imlay -
Doug Rehman -
Sumner, Dave, K1ZZ