Elecraft KDSP2 Manual User Manual
Page 40
40
DC Voltage Chart
Voltages are approximate. Measurements were made under the following conditions: 13.8 VDC power
supply. K2 turned ON, 3V Lithium cell installed, CW mode with default CF1 filter setting (800 Hz center,
600 Hz wide, noise reduction OFF), display showing frequency, DSPx module removed. KNB2 and KSB2
options installed.
Integrated Circuits
Pin V Pin V Pin V Pin V Pin V
U1-1 3.6 U1-11 4.9 U1-21 5.0 U2-1 13.5 U3-1 0
2 4.9
12 0
22 0
2 0 2 0.5
3 5.0
13 0
23 0
3 5.0
3 0.6
4
4.9 14
5.0 24
0
4
0
5 0 15 0 25 0
5 0
6 4.9
16 0
26 0
6 0
7 5.0
17 0
27 0
7 0
8 0 18 0 28 0
8 4.9
9 0 19 0
10
0
20
5.0
Diodes and Transistors
Pin
V
Pin V Pin
V Pin V
Q1-B
0
Q4-B
< 0.3
Q7-B
< 0.3
D3-A
0
E 0
E 0 E 0 D3-C
0
C 5.1
C >
3
C 5.0
D4-A
**
Q2-B 5.1 Q5-G 5.0
D4-C 4.9
E 5.0
S 5.0 D1-A
5.0 D5-A
*
C 5.7
D 5.0 D1-C
4.9 D5-C
*
Q3-B
0 Q6-G
5.0 D2-A
4.9 D6-A
*
E 0 S 5.0 D2-C
5.7 D6-C
*
C 5.7
D 5.0
*- This is a floating connection, not referenced to ground.
** - Varies with Lithium cell voltage