Differences

This shows you the differences between two versions of the page.

--- radios:ft-991a [2023/09/02 10:55] – m0lte
+++ radios:ft-991a [2024/02/15 18:05] – [TNC cable] m0lte
@@ Line 8: / Line 8: @@
 The FT-991A has an in-built automatic antenna tuner.
+===== TNC cable =====
+{{:packet:ft-450d_data_jack.png|}}
+(taken from FT-450D manual)
+| **Pin** | **Use**  | **NinoTNC / Kantronics pin** |
+| 1       | TX audio | 1               |
+| 2       | Ground   | 6               |
+| 3       | PTT      | 3               |
+| 5       | RX audio | 5               |
+A suitable cable can be made from a PS/2 extension lead, scrap PS/2 mouse or keyboard. Sometimes with the mouse/keyboard option, not all of the required pins are populated, so may not be suitable. Identify the pins with a multimeter (a croc clip lead is useful here.) Solder a DB9 plug on to the other end as above.
 ===== Packet Radio with NinoTNC =====
-Report from Simon M0XLZ is that he successfully uses NinoTNC with FT-991A to connect to GB7IOW over 300 baud HF packet (IL2P).
-Settings on the radio are:
+Settings on the radio for HF are:
   * mode: data-usb
   * dial setting of 7.04575 (for GB7IOW)
-On the F button:
+On the (F) button:
-  * DT Gain 60
+  * DT Gain 10  (DT Gain is unique to each setup, monitor ALC - increase until you see ALC kicking in, then back off)
-  * Shift +200hz
-  * Width 500hz
 On the Menu button:
-  * item 073 Data Out Level at 80
+  * 073 Data Out Level at 80-95
+  * 062 Data Mode - OTHERS
+  * Remember to set 108/109 back to DAKY/DATA if you've been using the SCU.
+For legacy HF modes with a 1700 CF (Centre Frequency)
+  * Menu 064 and 065 set at 1700Hz. (F) Width 500hz
+For the new beta NinoTNC modes with a 1500 CF (500Hz Bandwidth)
+  * Menu 064 and 065 set at 1500Hz. (F) Width 800hz    (500Hz does work though)
+===== Packet Radio with soundcard modem =====
+The FT-991A’s USB interface can be used for packet radio with soundcard modem software, with the caveat that it cannot be used for 9600 baud. See https://sourceforge.net/p/fldigi/wiki/FT991A_9600/
-The received signal needs to be at least 3 S points over the noise floor.