Setting up my TS-790A for Packet Radio - Versionsgeschichte

Dl8rds am 3. Dezember 2007 um 00:09 Uhr

2007-12-03T00:09:13Z

Dl8rds am 3. Dezember 2007 um 00:08 Uhr

2007-12-03T00:08:11Z

Dl8rds am 3. Dezember 2007 um 00:05 Uhr

2007-12-03T00:05:36Z

Dl8rds am 3. Dezember 2007 um 00:05 Uhr

2007-12-03T00:05:16Z

Dl8rds am 3. Dezember 2007 um 00:05 Uhr

2007-12-03T00:05:00Z

Dl8rds: New page: Packet Radio is a digital operating mode based on analog FM (frequency modulation). First of all, you can establish a direct link between your station and a packet radio digipeater, wh...

2007-12-02T23:31:35Z

New page: Packet Radio is a digital operating mode based on analog FM (frequency modulation). First of all, you can establish a direct link between your station and a packet radio digipeater, wh...

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Packet Radio is a digital operating mode based on analog FM (frequency modulation). First of all, you can establish a direct link between your station and a [[packet radio digipeater]], which is basically also such kind of a station. Most digipeaters are interconnected mostly with microwave links, making up a word wide network. The routing protocol used for it is [[AX-25]], an X25 variant for the special amateur radio purposes.

Packet Radio is a very early radio based digital network with its roots way back in the 1980s. In those days, 300 bit per second were really speedy. Today, 9k6 or partly 19k2 bit/s are good transmission speeds. Sure, nothing spectacular, you will say, looking at your 108 MBit/s WLAN router. That's very true, I need to admit, bit it's still an interesting technology, because you can learn a lot about digital operating modes. So what do you know about your wonderful WLAN router? How does it work? Hmmm? Yes? I'm listening!!

Let's have a deeper look inside.

== Terminal Node Controller ==
A TNC is a little more than a modem. It is a modem, but there's more to it. Think back to your old 14k4, 28k8, 33k6 or later 56kBit/s modems. They were only used to establish a digital connection to the link counterpart and to transmit single characters. So in a ISO/OSI sense they were only good for handling the physical layer and the link layer.

more to come...

← Nächstältere Version		Version vom 3. Dezember 2007, 00:09 Uhr
Zeile 49:		Zeile 49:
	Mike Hooper		Mike Hooper
	KF6PU @ WB6YMH.#SOCA		KF6PU @ WB6YMH.#SOCA
		+
		+	Please come back in a few weeks and you will find some pictures of the modification here.

← Nächstältere Version		Version vom 3. Dezember 2007, 00:08 Uhr
Zeile 1:		Zeile 1:
−	Packet Radio is a digital operating mode based on analog FM (frequency modulation). First of all, you can establish a direct link between your station and a [~~[packet radio~~ digipeater]], which is basically also such kind of a station. Most digipeaters are interconnected mostly with microwave links, making up a word wide network. The routing protocol used for it is [[AX-25]], an X25 variant for the special amateur radio purposes.	+	Packet Radio is a digital operating mode based on analog FM (frequency modulation). First of all, you can establish a direct link between your station and a [http://de.wikipedia.org/wiki/Digipeater digipeater], which is basically also such kind of a station. Most digipeaters are interconnected mostly with microwave links, making up a word wide network. The routing protocol used for it is [http://de.wikipedia.org/wiki/AX.25 AX.25], an X25 variant for the special amateur radio purposes.

	For Packet Radio, you need a Terminal Node Controller. I am operating the TNC2S for this purpose. Since 9,6 kBit/s require rather fast TX/RX switching times, the [[Kenwood TS-790A]] needs a small modification which I am going to describe here.		For Packet Radio, you need a Terminal Node Controller. I am operating the TNC2S for this purpose. Since 9,6 kBit/s require rather fast TX/RX switching times, the [[Kenwood TS-790A]] needs a small modification which I am going to describe here.

@@ Zeile 25: / Zeile 25: @@
   PIN 5 - RX audio to G3RUH
   PIN 8 - PTT
-−
   Prepare two six inch lenghts of RG-174. Prepare one end of each cable so that the shield will reach the ground lug mounted on the large aluminum heat sink. The
   cables will be routed over the top of the heat sink and will not be crushed when the bottom cover is reinstalled as there is adequate clearance.

@@ Zeile 20: / Zeile 20: @@
   Wire an eight pin din plug. Use shielded cable for TX and RX audio. No traces on the IF board need to be cut. Pins 3 and 5 of ACC 4 are not connected to
   anything as the radio comes from the factory. Make sure the Din plug fits the jack properly before wiring it.
   PIN 2 - ground

@@ Zeile 1: / Zeile 1: @@
 Packet Radio is a digital operating mode based on analog FM (frequency modulation). First of all, you can establish a direct link between your station and a [[packet radio digipeater]], which is basically also such kind of a station. Most digipeaters are interconnected mostly with microwave links, making up a word wide network. The routing protocol used for it is [[AX-25]], an X25 variant for the special amateur radio purposes.
-Packet Radio is a very early radio based digital network with its roots way back in the 1980s. In those days, 300 bit per second were really speedy. Today, 9k6 or partly 19k2 bit/s are good transmission speeds. Sure, nothing spectacular, you will say, looking at your 108 MBit/s WLAN router. That's very true, I need to admit, bit it's still an interesting technology, because you can learn a lot about digital operating modes. So what do you know about your wonderful WLAN router? How does it work? Hmmm? Yes? I'm listening!!
+For Packet Radio, you need a Terminal Node Controller. I am operating the TNC2S for this purpose. Since 9,6 kBit/s require rather fast TX/RX switching times, the [[Kenwood TS-790A]] needs a small modification which I am going to describe here.
-Let's have a deeper look inside.
+I decided to use the following modification:
-== Terminal Node Controller ==
+ The Kenwood TS-790A makes a wonderful 9600 BPS Packet Radio Transceiver as it has an excellent front end, powerful transmitter, and 144,440, and 1.2 GHZ
-A TNC is a little more than a modem. It is a modem, but there's more to it. Think back to your old 14k4, 28k8, 33k6 or later 56kBit/s modems. They were only used to establish a digital connection to the link counterpart and to transmit single characters. So in a ISO/OSI sense they were only good for handling the physical layer and the link layer.
+ coverage. The CFW-455F filter inside is not too narrow despite what you may have read and coupled with the low noise front end of the rig enables the G3RUH
+ Prepare two six inch lenghts of RG-174. Prepare one end of each cable so that the shield will reach the ground lug mounted on the large aluminum heat sink. The
-more to come...
+ cables will be routed over the top of the heat sink and will not be crushed when the bottom cover is reinstalled as there is adequate clearance.