NUE-PSK USB Add-on Card
Quick
Quick Quick
Quick Asembly
AsemblyAsembly
Asembly Guide
GuideGuide
Guide
Rev A4
Page 1
The USB add-on card makes your NUE-PSK Digital Modem more flexible
and useful with its ability to record QSO receive and transmit text to a USB
flash memory stick for archival and remote printing. The USB card also
provides a serial connection to a PC, a port for a USB printer, and a real-
time clock/calendar function (RTCC) to timestamp QSOs. The updated
v1.30 modem software contains the new keyboard commands for
controlling the USB card functions, plus an improved and consistent set of
text editing commands. The USB card fits into the existing modem
enclosure with minimal mods, and a replacement bottom chassis is
available with pre-drilled holes for the connectors.
NOTE 1: RTCC parts are not provided in this kit, and the USB Printer”
capability is not yet ready.
NOTE 3: A full manual is available at www.nue-psk.com/usb
In case of questions or problems, please visit the website for info, or
contact us by email at support@midnightdesignsolutions.com.
Assembly Instructions
1) Attach U1. Use care to ensure it is carefully aligned. Use desolder
braid (supplied) to remove excess solder between pins.
2) Attach all parts from SMT card. C4, R12, R13, R14 & R15 are
mounted on bottom of board (outlines shown on top.)
3) Attach crystal X1 slightly elevated so it touches no other parts.
4) Attach all remaining parts. J1 mounts on bottom side, and P3 mounts
on top. Check photos for proper placement. Ensure that P1, P2, LED1
and LED2 are mounted flat and straight.
5) Attach two nylon standoffs with screws.
6) Create 2-wire “extra signals” cable with ribbon cable and J2. Solder one
end of cable to J2. On modem board, remove screws and lift up LCD.
Solder two wires on other end of cable to points ‘a’ and ‘c’ on the modem
board at lower left area of U1 (See photo 1). This cable will plug into P3
when USB board is plugged in. Plug J2 into P3 such that the wire coming
from pad ‘a’ goes to P3 pin 1.
7) Add 5V jumper on modem board at Field Programming port P4. First
cut the ‘x’ trace connecting the two pads near the lower-left LCD standoff.
(Make sure this 3.3V trace is thoroughly cut.) Next add a short jumper
from the leftmost ‘X’ pad down to the pad above the Select pushbutton.
This jumper will supply 5V to the USB card. (See photo 2.)
Final Assembly
1) Use template from website to make holes in existing bottom chassis for
USB connectors and LEDs, or use the optional pre-drilled chassis.
2) Plug in the USB card to the Field Programming port P4 along the
modem board’s left edge and attach the Extra Signal jumper to P3. (Pin 1
goes to modem pad ‘a’, Pin 2 goes to modem pad ‘c’.)
3) Insert board assembly to new/modified chassis and screw into place.
(Proper clearance for modem board controls can be achieved by biasing
board to lower left while tightening top and bottom screws.)
Modem Software Requirements
In general, the modem must be running the latest software version (v1.34f
or later) in order to take advantage of all the USB features.
C10 R14 & R15
P2
(pin 1)
Photo 2: Adding 5V to P4
(See Assy step 9)
Photo 1: “Extra Signals cable”
(See Assy step 8)
Ground jumper
Solder jumper
between pads 4-5
QTY Description
C2, C12 2 Capacitor, SMD, 0805, 0.1 uF
C10, C4 2 Capacitor, SMD, 0805, 0.01 uF
C11 1 Capacitor, SMD, 0805, 0.001 uF
C6, C7,
C13, C14 4 Capacitor, SMD, 0805, 47 pF
C8, C9 2 Capacitor, SMD, 0805, 68 pF
C1, C3 2 Capacitor, SMD, 1.0 uF
R5, R6,
R10, R11 4 Resistor, SMD 0805, 47K ohms
R3, R4 4 Resistor, SMD 0805, 27 ohms
R12, R13 2 Resistor, SMD 0805, 100K ohms
R14, R15 2 Resistor, SMD 0805, 1K ohms
R9 1 Resistor, SMD 0805, 10K ohms
R7 1 Resistor, SMD 0805, 180 ohms
R25, R26 2 Resistor, SMD 0805, 330 ohms
P2 1 USB connector, Type A
P1 1 USB connector, Type B
J1 1 SIP receptacle, 0,1", 1x4, 90-deg
J2 1 SIP receptacle, 0,1", 1x2
W1 1 Ribbon cable, 2-w ire, 4"
P3 1 Pinheader, 1x2, 90-deg
LED1,
LED2 2 LED, 90-deg, green
U1 1 Vinculum VNC1L-1A, LQFP-48
U2 1 Voltage regulator, 3.3V, LP2950 (TO-92)
X1 1 Crystal (12.000 MHz, parallel resonant)
PCB 1 PC Board
2 Spacer, nylon, hex tapped, 4-40x1/4" (PCB)
4 Machine screw , pan slotted, #4-40x3/16"
1 SolderWick™ , 6"
