Electronics > Repair
W&G sna-20/23 spectrum analyzer repair
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Gerhard_dk4xp:
same like mine. Even the patch wire on the VG96 connector is the same,
and the empty socket.
dxl:

--- Quote from: Pude on October 01, 2022, 03:43:05 pm ---Yes, my mainboard is based also on the AMD386sx. Btw. I have not looked yet what is the chip missing from the socket near the processor. Might be some option.

--- End quote ---

Maybe for an optional i387 FPU?
dxl:
Looking at the disassembly of GERPC.EXE from the H version, it looks like there is a command line option '-debugoutput' which seems to take either vga,com1,com2 or buff as argument.

EDIT: looks like this is rather a environment variable, so likely something like 'set DEBUGOUTPUT=X' in the startup batch file. where X is:

0 - VGA
1 - COM1
2 - COM2
3 - BUFF

However, it doesn't log much more in my QEMU. Maybe on real hardware, i don't know.
dxl:
This is the debug output in my qemu:


--- Code: ---selector of main() = 0x017F 0:43:24
6283816 Bytes of memory available
main: SW-Version 3.13 on SNA 00000
5729456 Bytes of memory available
INTERNAL ERROR <0x0000>: Download error ZF-DSP 0x3001
CommunicationError TIMEOUT
from ZF-DSP in ZF_Get_PegKorrLoc !
Error 0x3005 (TIMEOUT): ZF_DSP.ram_putLevelTab
Mm_FKorr_c: corrected gain for band 0 for -1.000dB
min=0.000dB at 0GHz, max=6.413dB at 2.62GHz
Error 0x3005 (TIMEOUT): ZF_ram_putFreqTab
Error 0x3005 (TIMEOUT): ZF_ram_putFreqTab
Error 0x3005 (TIMEOUT): ZF_ram_putFreqTab
Error 0x3005 (TIMEOUT): ZF_ram_putFreqTab
INTERNAL ERROR <0x0000>: Download error Synthe 0x3001
CommunicationError TIMEOUT
from ZF-DSP in ZF_Set_Vbw !
CommunicationError TIMEOUT
from ZF-DSP in ZF_Bild_Init !
FATAL ERROR <0x3005>: ZF_DSP_Error in ZF_Handler
program terminated at 0:43:30

INTERNAL ERROR <0x0000>: Error deleting Task "Messen"(ID: 44, Prio: 6)
WGRM ERROR "critical task switch"

--- End code ---

Of course it complains about the DSP Firmware download, it's all virtual, and therefore no hardware present...
Pude:
Here's my unit output from the screen.
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