DX Engineering DXE-TVSU-1B, Manual

Page: 12 / 20

- 12 -
Delay adjustments are grouped in four DIP switches per function. Each function can be
programmed for the desired delay time in milliseconds using
Table 1 below. The TONE Freq
function adjusts the CW side tone frequency in Hz noted in the far right column in Table 1 .
DIP Switch
Settings
OPEN=1
Delay Time
Milliseconds
Sidetone
Frequency - Hz
TONE Only
4321
0000 0 300
0001 2 347
0010 4 393
0011 6 440
0100 8 487
0101 10 533
0110 12 580
0111 14 627
1000 16 673
1001 18 720
1010 20 767
1011 22 813
1100 24 860
1101 26 907
1110 28 953
1111 30 1000
Table 1 - DIP Switch Delay Settings for Each Function
Note: The delay time increments work independently and are not additive.
Typical Switchover Times:

Linear Amplifier: 5 to 15 ms

DX Engineering Active Antennas (using the AVA-2 amplifier): 2 ms

Tube Transceivers: 5 to 30 ms

Solid State Transceivers: 3 to 15 ms

Receiving pre amplifiers: 3 to 30 ms

Large Open-Frame Relays: 15 ms
CW Sidetone Audio Level
There are two jumper headers on the
TVSU-1B circuit board labeled HD1
and HD2 . These jumpers are located directly behind the TONE audio jack.
If the TONE audio output is excessive, even with the VOL adjustment fully
counterclockwise, removing both jumpers will reduce the output. Both
jumpers should be set the same. Normally, these jumpers do not need to be
changed.