Specifications

10-1
Chapter 10 - DL-1000C Audio Delay Board
When placed in the receive audio path, the will eliminate the first chirp of DTMF tone
during DTMF muting, and it will eliminate the squelch crash noise present on many
repeater systems. A dipswitch selects delays of 50, 100, 200 or 400 milliseconds.
The delayed audio is faithfully reproduced.
Installation is easy. Remove the jumper plug from the CAT-1000B at J8. Replace the
jumper with the cable from the DL-1000C. The remote base audio can be delayed at J9
with a second DL-1000C.
CAT-1000 DL-1000C
DL-1000C
J8-1
J8-5
J8-4
J8-3
J8-2
J9-1
J9-5
J9-4
J9-3
J9-2
J1-5
J1-4
J1-3
J1-2
J1-1
J1-5
J1-4
J1-3
J1-2
J1-1
COR #1
AUDIO IN
AUDIO OUT
GROUND
+12VDC
COR #2
AUDIO IN
AUDIO OUT
GROUND
+12VDC
3
2
1
3
2
1 COR HI
COR LO
COR LO
COR HI
J2 JUMPER
J2 JUMPER
Select Delay
The amount of audio delay is determined by the setting of dipswitch SW1. The typical
repeater receiver has a squelch crash noise of Approximately 40 milliseconds. The 100
millisecond setting should be sufficient to eliminate the noise in most cases. If
not, increase the delay to the next setting.
MILLISECONDS SW1 SW2 SW3 SW4
0.0 OFF OFF OFF OFF
50 ON OFF OFF OFF
100 ON ON OFF OFF
200 ON ON ON OFF
400 ON ON ON ON