-
- Yet Another Modem 9k6
- (G3RUH Compatible)
- The modem is capable of 9600 bit/s operations and interfaces directly
to the PC serial port from which it is also powered. It has a built-in
HDLC controller which greatly simplifies the development of driver software
and allows fast and reliable HDLC frame synchronization.
- The baseband codec features a GMSK - or cosine NLF - G3RUH compatible
modulator, a powerful hardware digital carrier detector and a high resolution
Rx clock recovery circuit.
-
- Updates
-
YAM Release v1.10 (24 Nov 1997): yam1_10.zip
- YAMSD110.PDF - Schematic Diagram (hardware release v1.10)
- YAM110.MCS - FPGA Configuration File (hardware release v1.10)
- README.TXT - Release Notes
- Modifications in v1.10 since previous release v1.7:
- Corrections:
- In the schematic diagram the Pin 21 of the Xc5202 FPGA was
erroneously left open. The error has been corrected and Pin 21
has been tied to GND.
- In the schematic diagram the power-supply pins of the TL064
op-amp were erroneusly inverted. The error has been fixed
and the power-supply pins tied to the right power rails.
- Updates:
- For lovers of whistles and bells three LEDs have been added
(PWR, ON-AIR and CD signals).
- The Xc5202 pinout has been changed to improve the routability
of a single layer PCB. Refer to the new schematic diagram for the
details.
- The PTT interface has been slightly simplified.
- Important Note: The new configuration file YAM110.MCS is NOT
compatible with
- the hardware release v1.7 and should be used only in conjunction with
the hardware release
- v1.10.
- Note that the batch files in the driver archives (TFX_COMx.BAT, YAMPKT.BAT)
contains the command line:
- If you are to use the v1.10 YAM hardware correct this line to:
PCB Layout
v1.10
-
- Single-sided PCB for homebrewers (low-resolution drawings, not to scale):
A double-sided PCB is under construction too and the first samples will
be available very soon via our local ham association.
- Click here
to download the drawings (~390KB, .pdf format).
- Drivers
- Nord><Link's
"The Firmware eXtended" for YAM: tfxyam09.zip
- This software is subject to the ALAS license.
Please read it before download.
- Any commercial use is prohibited.
- Archive contents:
- YAMINIT.EXE - YAM modem configuration utility
- YAM17.MCS - YAM modem configuration data (hardware release v.1.7)
- TFX_YAM.COM - The Firmware for YAM
- TFX_COMx.BAT - Sample TFX_YAM initialization batch files
FlexNet
YAM Driver v0.4 : yamser04.zip
- The FlexNet YAM driver has been developed by Jurgen
Hasch, DG1SCR.
An expecial thank to Juergen for his precious work.
- Archive contents:
- YAMSER.EXE - The FlexNet driver
- FL.BAT - Sample FlexNet initialization batch file
- YAMSER.ENG - Documentation in English language.
- YAMSER.DOC - Documentation in German language.
YAM Packet Driver for NOS: yamnos.zip
- This is still an alfa release. Use it only for evaluation purposes
since the P-persistence algorithm is not yet implemented.
- Archive contents:
- YAMINIT.EXE - YAM modem configuration utility
- YAM17.MCS - YAM modem configuration data (hardware release v.1.7)
- YAM.COM - Packet Driver for the YAM modem
- YAM.ASM - Packet Driver source code
- YAMPKT.BAT - Sample YAM initialization batch file
Documentation
- V1.7 Basic Documentation: yamdoc17.zip
- YAMSD17.PDF - Schematic Diagram (hardware release v.1.7)
- YAMPAR.TXT - Parts List
- YAMPCB.PS - Luis Yanes' PCB - Solder side (not tested)
- YAMSLK.PS - Luis Yanes' PCB - Silkscreen overlay (not tested)
- EYE.GIF - YAM Eye Diagram
V1.7 Core Documentation: yamcor17.zip
- YAMCORE.PDF - YAM FPGA Core Schematics (hardware release v.1.7)
- TXPROT.GIF - Serial interface transmission protocol
- TXPROTD.GIF - Details of the serial interface transmission protocol
- Nico Palermo - IV3NWV. All rights reserved.
- If you have comments or suggestions on this device, email the designer
at iv3nwv@microlet.com