Msg Nr. : 32409 Da : LU7AKC Per : NET9K6@WW Tipo/status : B$ Data/ora : 0815/0253 Dimensione : 8848 Titolo : IC970 & 9600 Bps Bid (Mid) : 12257_LU7AKC To use the ICOM IC-970 on the UOSAT's (9600 baud), I made the following modifications: Transmit - Solder a shielded wire (I used RG174) to the a˙˙˙˙node of D16 (1SV50E). This is at the junction of R52 (470K) and C44 (.0047). Make sure to solder the shield to the adjacent PC board ground plane. Receive - Solder a shielded wire to pin 9 of IC11 (MC3357P), again make sure to solder the shield to the PC board ground plane. Both transmit and receive are on the main unit circuit board. Make sure that you use IC11 as this is the sub band receiver. If you plan to use the IC-970 for terrestrial packet (ie. simplex on either 145 or 440) you will need to add another shielded wire to IC5, which is the main receiver discriminator. I then brought the shielded wires out the rear of the radio. I did this by removing the plate which covers the two holes located below ACC(1). In order to disconnect the wires from the modem, I installed two phono jacks in the center of the holes on the metal plate. I have used this setup with the G3RUH modem, PacComm NB96, and the MFJ-9600. I found that it was not necessary to add the 10K series resistor to the transmit audio/deviation line. On all three, with the center of the 10K pot range as 12 o'clock, I fouod that about 1 o'clock to work best on for me. Note: Make sure that the DC power source for the TNC and 9600 baud modem are on a clean supply (no ripple). Several users have found this to be the reason they could not get their modems to work. Also make sure that the TNC modem switch is set to 9600 baud as this provides the 153.6kHz to the modem. The modem documentation is not very clear in this area. I run the terminal speed at 19,200. If you have any questions, I can be reached at: Dale Hagert NM0H 3881 Serpentine Circle Eagan, MN 55122 612-452-1030 =============================================================================== ICOM IC-970 MODEM INTERFACES FOR SATELLITE COMMUNICATIONS DO NOT USE THE IC-970 MICROPHONE CONNECTOR FOR TRANSMIT OR RECEIVE AUDIO. There seems to be too much audio shaping in this path. Use the DATA connector on the back of the IC-970. I have tried it both ways without much luck through the microphone connector. The DATA connector method works very well. PAC-COMM PSK-1 MODEM - 1. IC-970 INTERFACE - The IC-970 DATA connector leads to be used are as follows (see page 13 of owner's manual): a. Pin 1 is transmit audio from the PSK-1 VHF RADIO connector pin 1 to IC-970. b. Pin 7 is the push to talk lead from the PSK-1 VHF RADIO connector pin 3. c. Pin 8 is the UP/DOWN lead from the modem to the IC-970. This lead is connected to the PSK-1 UHF RADIO connector pin 1. Install a 470 ohm resistor from pin 1 to pin 5 of the PSK-1 UHF RADIO connector. d. Pin 9 is a ground lead to the PSK-1 VHF RADIO connector pin 2. e. Pin 10 is the SUB band audio output from the IC-970 to the PSK-1 VHF RADIO connector pin 4. SEE NOTE 1. 2. Set the PSK-1 parameter configuration as follows: MODE - SATellite MODEM - IN (in line) JT/SP - JOINT (for IC-970) AFC - USB or LSB (same as the mode selected on the IC-970) KC TUNER RADIO TYPE - NONE (not used at this station) RS232 SPEED - (RS232 port not used at this station) DCD SENSE - Use default except for KANTRONICS TNC. Doesn't seem to make a difference in Full Duplex mode). MAXIMUM STEP RATE - 12 steps per second MIC-CLICK SENSE - ACTIVE LOW (for IC-970) CLICKS-PER-STEP - 1 The PSK-1 allows about 150 to 200 hertz drift before frequency correction pulses begin. In the IC-970 in SSB mode, each pulse results in a 10 hz frequency change. Ten such pulses occur for each change in the IC-970 frequency readout. The above arrangement will track an overhead satellite pass with maximum Doppler shift. TAPR PSK MODEM - 1. IC-970 INTERFACE - The IC-970 DATA connector leads to be used are as follows (see page 13 of owner's manual): a. Pin 1 is transmit audio from the modem VHF RADIO connector pin 1 to IC-970. b. Pin 7 is the push to talk lead from the modem VHF RADIO connector pin 3. c. Pin 8 is the UP/DOWN lead from the modem to the IC-970. This lead is connected to the modem UHF RADIO connector pin 5. d. Pin 9 is a ground lead to the modem VHF RADIO connector pin 2. e. Pin 10 is the SUB band audio output from the IC-970 to the modem VHF RADIO connector pin 4. SEE NOTE 1. 2. Construct the following on a 12 pin header strip socket and install it on the combination JP5/JP6 plug in the modem: TOP VIEW OF CIRCUIT BOARD * * | | | * *----, | JP5 | | | * * \ | / 470 ohms *-------* \ | To 1k ohms | | 2N2222 Base ----\/\/\---* ,---*----' | JP6 | | ,---* | * | | | | To 2N2222 Collector | | To 2N2222 Emitter The TAPR PSK modem allows about 30 to 40 hertz drift before frequency correction pulses begin. In the IC-970 in SSB mode, each pulse results in a 10 hz frequency change. Ten such pulses occur for each change in the IC-970 frequency readout. The above arrangement will track an overhead satellite pass with maximum Doppler shift. NOTE 1: The IC-970 DATA connector pin 10 only carries SUB band audio. In order to use your TNC for simplex (MAIN band) terrestrial packet communications you must obtain Main band audio from IC-970 DATA connector pin 5. This will require you to provide a means of switching the modem (PSK-1 or TAPR) VHF RADIO connector pin 4 to either IC-970 DATA pin 10 or DATA pin 5 for SUB band or MAIN band audio respectively. NOTE 2: The IC-970 has an internal switch (see pages 13 & 42 in your owner's manual) which lets you set this input for 100 mv (default) or 3 mv. Placing a jumper on JP5 in the PSK-1 or JP7 in the TAPR PSK modem significantly increases the level of transmit audio from the modem which can then be adjusted with R40 on the rear panel of the PSK-1 or R6 in the TAPR modem. You should leave the IC-970 in the 100 mv input position in this case. 73, W0SL Msg Nr. : 99747 Da : WH6I Per : ALL @AMSAT Tipo/status : B$ Data/ora : 0116/1619 Dimensione : 4042 Titolo : Modifica 9600 baud per l'IC970 Bid (Mid) : 7A8E_KO23 ======================================= This file was received from KitSat 23 Originator: wh6i Destination: 9y4dg, all File Number: 7A8E ======================================= To use the ICOM IC-970 on the UOSAT's (9600 baud), I made the following modifications: Transmit - Solder a shielded wire (I used RG174) to the anode of D16 (1SV50E). This is at the junction of R52 (470K) and C44 (.0047). Make sure to solder the shield to the adjacent PC board ground plane. Receive - Solder a shielded wire to pin 9 of IC11 (MC3357P), again make sure to solder the shield to the PC board ground plane. Both transmit and receive are on the main unit circuit board. Make sure that you use IC11 as this is the sub band receiver. If you plan to use the IC-970 for terrestrial packet (ie. simplex on either 145 or 440) you will need to add another shielded wire to IC5, which is the main receiver discriminator. I then brought the shielded wires out the rear of the radio. I did this by removing the plate which covers the two holes located below ACC(1). In order to disconnect the wires from the modem, I installed two phono jacks in the center of the holes on the metal plate. I have used this setup with the G3RUH modem, PacComm NB96, and the MFJ-9600. I found that it was not necessary to add the 10K series resistor to the transmit audio/deviation line. On all three, with the center of the 10K pot range as 12 o'clock, I found that about 1 o'clock to work best on for me. Note: Make sure that the DC power source for the TNC and 9600 baud modem are on a clean supply (no ripple). Several users have found this to be the reason they could not get their modems to work. Also make sure that the TNC modem switch is set to 9600 baud as this provides the 153.6kHz to the modem. The modem documentation is not very clear in this area. I run the terminal speed at 19,200. If you have any questions, I can be reached at: Dale Hagert NM0H 3881 Serpentine Circle Eagan, MN 55122 612-452-1030 Msg Nr. : 32409 Da : LU7AKC Per : NET9K6@WW Tipo/status : B$ Data/ora : 0815/0253 Dimensione : 8848 Titolo : IC970 & 9600 Bps Bid (Mid) : 12257_LU7AKC To use the ICOM IC-970 on the UOSAT's (9600 baud), I made the following modifications: Transmit - Solder a shielded wire (I used RG174) to the a˙˙˙˙node of D16 (1SV50E). This is at the junction of R52 (470K) and C44 (.0047). Make sure to solder the shield to the adjacent PC board ground plane. Receive - Solder a shielded wire to pin 9 of IC11 (MC3357P), again make sure to solder the shield to the PC board ground plane. Both transmit and receive are on the main unit circuit board. Make sure that you use IC11 as this is the sub band receiver. If you plan to use the IC-970 for terrestrial packet (ie. simplex on either 145 or 440) you will need to add another shielded wire to IC5, which is the main receiver discriminator. I then brought the shielded wires out the rear of the radio. I did this by removing the plate which covers the two holes located below ACC(1). In order to disconnect the wires from the modem, I installed two phono jacks in the center of the holes on the metal plate. I have used this setup with the G3RUH modem, PacComm NB96, and the MFJ-9600. I found that it was not necessary to add the 10K series resistor to the transmit audio/deviation line. On all three, with the center of the 10K pot range as 12 o'clock, I fouod that about 1 o'clock to work best on for me. Note: Make sure that the DC power source for the TNC and 9600 baud modem are on a clean supply (no ripple). Several users have found this to be the reason they could not get their modems to work. Also make sure that the TNC modem switch is set to 9600 baud as this provides the 153.6kHz to the modem. The modem documentation is not very clear in this area. I run the terminal speed at 19,200. If you have any questions, I can be reached at: Dale Hagert NM0H 3881 Serpentine Circle Eagan, MN 55122 612-452-1030 =============================================================================== ICOM IC-970 MODEM INTERFACES FOR SATELLITE COMMUNICATIONS DO NOT USE THE IC-970 MICROPHONE CONNECTOR FOR TRANSMIT OR RECEIVE AUDIO. There seems to be too much audio shaping in this path. Use the DATA connector on the back of the IC-970. I have tried it both ways without much luck through the microphone connector. The DATA connector method works very well. PAC-COMM PSK-1 MODEM - 1. IC-970 INTERFACE - The IC-970 DATA connector leads to be used are as follows (see page 13 of owner's manual): a. Pin 1 is transmit audio from the PSK-1 VHF RADIO connector pin 1 to IC-970. b. Pin 7 is the push to talk lead from the PSK-1 VHF RADIO connector pin 3. c. Pin 8 is the UP/DOWN lead from the modem to the IC-970. This lead is connected to the PSK-1 UHF RADIO connector pin 1. Install a 470 ohm resistor from pin 1 to pin 5 of the PSK-1 UHF RADIO connector. d. Pin 9 is a ground lead to the PSK-1 VHF RADIO connector pin 2. e. Pin 10 is the SUB band audio output from the IC-970 to the PSK-1 VHF RADIO connector pin 4. SEE NOTE 1. 2. Set the PSK-1 parameter configuration as follows: MODE - SATellite MODEM - IN (in line) JT/SP - JOINT (for IC-970) AFC - USB or LSB (same as the mode selected on the IC-970) KC TUNER RADIO TYPE - NONE (not used at this station) RS232 SPEED - (RS232 port not used at this station) DCD SENSE - Use default except for KANTRONICS TNC. Doesn't seem to make a difference in Full Duplex mode). MAXIMUM STEP RATE - 12 steps per second MIC-CLICK SENSE - ACTIVE LOW (for IC-970) CLICKS-PER-STEP - 1 The PSK-1 allows about 150 to 200 hertz drift before frequency correction pulses begin. In the IC-970 in SSB mode, each pulse results in a 10 hz frequency change. Ten such pulses occur for each change in the IC-970 frequency readout. The above arrangement will track an overhead satellite pass with maximum Doppler shift. TAPR PSK MODEM - 1. IC-970 INTERFACE - The IC-970 DATA connector leads to be used are as follows (see page 13 of owner's manual): a. Pin 1 is transmit audio from the modem VHF RADIO connector pin 1 to IC-970. b. Pin 7 is the push to talk lead from the modem VHF RADIO connector pin 3. c. Pin 8 is the UP/DOWN lead from the modem to the IC-970. This lead is connected to the modem UHF RADIO connector pin 5. d. Pin 9 is a ground lead to the modem VHF RADIO connector pin 2. e. Pin 10 is the SUB band audio output from the IC-970 to the modem VHF RADIO connector pin 4. SEE NOTE 1. 2. Construct the following on a 12 pin header strip socket and install it on the combination JP5/JP6 plug in the modem: TOP VIEW OF CIRCUIT BOARD * * | | | * *----, | JP5 | | | * * \ | / 470 ohms *-------* \ | To 1k ohms | | 2N2222 Base ----\/\/\---* ,---*----' | JP6 | | ,---* | * | | | | To 2N2222 Collector | | To 2N2222 Emitter The TAPR PSK modem allows about 30 to 40 hertz drift before frequency correction pulses begin. In the IC-970 in SSB mode, each pulse results in a 10 hz frequency change. Ten such pulses occur for each change in the IC-970 frequency readout. The above arrangement will track an overhead satellite pass with maximum Doppler shift. NOTE 1: The IC-970 DATA connector pin 10 only carries SUB band audio. In order to use your TNC for simplex (MAIN band) terrestrial packet communications you must obtain Main band audio from IC-970 DATA connector pin 5. This will require you to provide a means of switching the modem (PSK-1 or TAPR) VHF RADIO connector pin 4 to either IC-970 DATA pin 10 or DATA pin 5 for SUB band or MAIN band audio respectively. NOTE 2: The IC-970 has an internal switch (see pages 13 & 42 in your owner's manual) which lets you set this input for 100 mv (default) or 3 mv. Placing a jumper on JP5 in the PSK-1 or JP7 in the TAPR PSK modem significantly increases the level of transmit audio from the modem which can then be adjusted with R40 on the rear panel of the PSK-1 or R6 in the TAPR modem. You should leave the IC-970 in the 100 mv input position in this case. 73, W0SL Msg Nr. : 99747 Da : WH6I Per : ALL @AMSAT Tipo/status : B$ Data/ora : 0116/1619 Dimensione : 4042 Titolo : Modifica 9600 baud per l'IC970 Bid (Mid) : 7A8E_KO23 ======================================= This file was received from KitSat 23 Originator: wh6i Destination: 9y4dg, all File Number: 7A8E ======================================= To use the ICOM IC-970 on the UOSAT's (9600 baud), I made the following modifications: Transmit - Solder a shielded wire (I used RG174) to the anode of D16 (1SV50E). This is at the junction of R52 (470K) and C44 (.0047). Make sure to solder the shield to the adjacent PC board ground plane. Receive - Solder a shielded wire to pin 9 of IC11 (MC3357P), again make sure to solder the shield to the PC board ground plane. Both transmit and receive are on the main unit circuit board. Make sure that you use IC11 as this is the sub band receiver. If you plan to use the IC-970 for terrestrial packet (ie. simplex on either 145 or 440) you will need to add another shielded wire to IC5, which is the main receiver discriminator. I then brought the shielded wires out the rear of the radio. I did this by removing the plate which covers the two holes located below ACC(1). In order to disconnect the wires from the modem, I installed two phono jacks in the center of the holes on the metal plate. I have used this setup with the G3RUH modem, PacComm NB96, and the MFJ-9600. I found that it was not necessary to add the 10K series resistor to the transmit audio/deviation line. On all three, with the center of the 10K pot range as 12 o'clock, I found that about 1 o'clock to work best on for me. Note: Make sure that the DC power source for the TNC and 9600 baud modem are on a clean supply (no ripple). Several users have found this to be the reason they could not get their modems to work. Also make sure that the TNC modem switch is set to 9600 baud as this provides the 153.6kHz to the modem. The modem documentation is not very clear in this area. I run the terminal speed at 19,200. If you have any questions, I can be reached at: Dale Hagert NM0H 3881 Serpentine Circle Eagan, MN 55122 612-452-1030