so its in and working well. I have not been past 180 ft yet but it reads bottom cleanly running 38 mph and still clean at 30 mph in very bumpy seas.
It is a vast improvement over the old B744 on a GSD22
As soon as I get out to 2000ft I will post results.
I run the GSD24/R199 from the 4208 and I use the "Built-in sonar" on the 1242xsv (CHIRP- Sidevu/downvu/traditional with GT51M thruHull)
They operate at different frequencies and I have no interference when running both.
The 4208 and 1242 are on Garmin Network. You have to start Sonar on the 4208 first to gain control of the GSD24.
If you use the 1242 first to run the GSD24 and then change to the built-in, it will disable the GSD24. Then you will not be able to run from the other network MFD (my 4208).
You have to set the 1242 to "built in" not "Auto" then shut down the MFDs, power up and turn on sonar on the 4208 (it has no "built-in" it will take control of the GSD24)
Point is...It is possible to simultaneously view GSD24 on the both 1242 and 4208 but there are circumstances where it will disable the sonar when you switch back.
I put it down with 5200 fast cure. Made sure it did not get the inside messy. Then I sealed the inside to hull with 610 epoxy and some fiberglass tabs.
Filled with -50 deg RV antifreeze
I connected to a new GSD 24 with an 8 pin adapter
The orange wire is XducerID. It did recognize that there was a 50khz/200khz xducer but it has came up as 500w @340 ohms. I had to go into a super-secret menu to change it using the 4208.
These are instructions that Garmin Support sent me. They were very good...followed thru on several emails.
You're going to need to manual configure the transducer to like you said 2000w to 100ohms for both 50K power and 200k power
For GPSMAP 4xxx, 5xxx, 6xxx, 70xx, and 72xx series chartplotters:
- Start with the system powered off
- If your transducer does have an XID wire, disconnect it from the 8-pin adapter (I did not do that but it still worked)
- Power on the system
- Select I Agree
- On the Home screen, you will get an alarm that says "Transducer Disconnected, Sonar turned off"
- Clear the alarm
- Select Configure
- Select My Boat
- Activate the hidden button
- On a GPSMAP 4xxx or 6xxx series device, press and hold the Mark button
- On a GPSMAP 5xxx, 72xx, or 70xx series device, press and hold your thumb in the bottom-left corner of the screen
- After 5-10 seconds, Transducer Configuration will appear(you have to HOLD it awhile or it will just Mark a waypoint!!!!)
- Select Transducer Configuration
- Select 200kHz
- Select OK that you understand manual configuration can damage the transducer
- Select Manual Enabled to show On
- Enter the Impedance and Max Xmit Power of the transducer (available on the Airmar website)
- Select Apply
- Select 50kHz
- Select OK that you understand manual configuration can damage the transducer
- Select Manual Enabled to show On
- Enter the Impedance and Max Xmit Power of the transducer
- Select Apply
- Select Home
This would be for the 4208.
The setting goes into the GSD24 so it shows up over the network on the 1242.
To change it on the 1242 I think I would have to remove the orange wire to get into manual setup.
I might run into a problem if the GSD24 or 1242 tries to sense the Xducer ID and reset it. If so, I'll remove the orange wire
