From 3eac6aa1569c2f6756435b0a49fc012e449ff30f Mon Sep 17 00:00:00 2001 From: Thilo Huck Date: Thu, 27 Aug 2026 10:09:55 +0200 Subject: [PATCH 1/3] Updated Hardware triggering documentation with relevant information --- docs/dvl/dvl-triggering.md | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/docs/dvl/dvl-triggering.md b/docs/dvl/dvl-triggering.md index cef87dbb..61ad8cb7 100644 --- a/docs/dvl/dvl-triggering.md +++ b/docs/dvl/dvl-triggering.md @@ -9,16 +9,19 @@ The DVL has different options for triggering acoustic pings to perform a velocit ## Hardware triggering -Use the RS232 RX line of the DVL to send a trigger command after enabling hardware triggering in the [configuration](configuration.md#operating-configurations). +Use the RS232 RX line of the DVL to trigger a ping after enabling hardware triggering in the [configuration](configuration.md#operating-configurations). -Once hardware triggering is enabled, transmit a "NUL" ASCII character (Ctrl + @) to send a ping. The trigger is detected on the falling edge of the signal. +The trigger is detected on the **falling edge** of the RX signal. The signal must then remain low for approximately **78.1 µs** before returning high. - +For a UART connection configured as **115200 baud, 8N1**, this pulse corresponds to transmitting a `"NUL"` ASCII character (`0x00`, Ctrl + @). -You can send this trigger signal as often as needed. If the DVL is already transmitting, it discards the signal. +Because the trigger is defined by its **pulse timing**, sending a `NUL` character at another baud rate may not produce a valid trigger. + +The trigger can be sent as often as needed. If the DVL is already transmitting or receiving, incoming trigger signals are discarded. !!! warning - Acoustics must be enabled. If acoustics are disabled, hardware triggering will not work. + + Acoustics must be enabled. Hardware triggering will not work while acoustics are disabled. ## Software triggering From 194100a0b1f64470aa70b53be1908c038d2191ec Mon Sep 17 00:00:00 2001 From: Thilo Huck Date: Thu, 27 Aug 2026 10:12:34 +0200 Subject: [PATCH 2/3] highlighting --- docs/dvl/dvl-triggering.md | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/docs/dvl/dvl-triggering.md b/docs/dvl/dvl-triggering.md index 61ad8cb7..58c629ef 100644 --- a/docs/dvl/dvl-triggering.md +++ b/docs/dvl/dvl-triggering.md @@ -11,11 +11,11 @@ The DVL has different options for triggering acoustic pings to perform a velocit Use the RS232 RX line of the DVL to trigger a ping after enabling hardware triggering in the [configuration](configuration.md#operating-configurations). -The trigger is detected on the **falling edge** of the RX signal. The signal must then remain low for approximately **78.1 µs** before returning high. +The trigger is detected on the falling edge of the RX signal. The signal must then remain low for approximately 78.1 µs before returning high. -For a UART connection configured as **115200 baud, 8N1**, this pulse corresponds to transmitting a `"NUL"` ASCII character (`0x00`, Ctrl + @). +For a UART connection configured as 115200 baud, 8N1, this pulse corresponds to transmitting a `"NUL"` ASCII character (`0x00`, Ctrl + @). -Because the trigger is defined by its **pulse timing**, sending a `NUL` character at another baud rate may not produce a valid trigger. +Because the trigger is defined by its pulse timing, sending a `NUL` character at another baud rate may **not** produce a valid trigger. The trigger can be sent as often as needed. If the DVL is already transmitting or receiving, incoming trigger signals are discarded. From 66ccd65328d766c624c0221aa46d6817af59121c Mon Sep 17 00:00:00 2001 From: Thilo Huck Date: Tue, 15 Sep 2026 15:43:28 +0200 Subject: [PATCH 3/3] take out UART to avoid confusion --- docs/dvl/dvl-triggering.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/dvl/dvl-triggering.md b/docs/dvl/dvl-triggering.md index 58c629ef..3122186e 100644 --- a/docs/dvl/dvl-triggering.md +++ b/docs/dvl/dvl-triggering.md @@ -13,7 +13,7 @@ Use the RS232 RX line of the DVL to trigger a ping after enabling hardware trigg The trigger is detected on the falling edge of the RX signal. The signal must then remain low for approximately 78.1 µs before returning high. -For a UART connection configured as 115200 baud, 8N1, this pulse corresponds to transmitting a `"NUL"` ASCII character (`0x00`, Ctrl + @). +For a connection configured as 115200 baud, 8N1, this pulse corresponds to transmitting a `"NUL"` ASCII character (`0x00`, Ctrl + @). Because the trigger is defined by its pulse timing, sending a `NUL` character at another baud rate may **not** produce a valid trigger.