S2-7; S2-8 And S2-9; S2-10 And S2-11; S2-12 - Motorola CDR500 Programming Manual

CDR500 & CDR700 Repeater Service Manual
input of the transmit radio. If a normal EIA de-empha-
sized audio response is selected from the receive radio,
pre-emphasized audio is required in the transmit radio
and S2-6 should be ON (S2-5 should be OFF). If a flat
audio response is selected from the receive radio, a flat
audio response is required in the transmit radio and S2-
5 should be ON (S2-6 should be OFF).
S2-5 should be set:
• OFF* for EIA de-emphasized /pre-emphasized
audio
• ON for flat audio.
S2-6 should be set:
• OFF for flat audio
• ON* for EIA de-emphasized/pre-emphasized
audio.

S2-7

S2-7 enables the audio path through the audio gate
(Q8). S2-7 is ON when VOX is used (EIA de-empha-
sized/muted audio must be provided by the receive
radio).
S2-7 should be set:
• OFF* for COR applications
• ON for VOX operation.

S2-8 and S2-9

S2-8 and S2-9 duplicate the functions of S2-6 and S2-5
for the audio input to the transmitter of the receive
radio in a bidirectional repeater (note the reverse order
for the corresponding functions). The typical bidirec-
tional repeater uses de-emphasized receiver audio
from the transmit radio and S2-8 should be ON (S2-9
should be OFF).
S2-8 should be set:
• OFF for flat audio
• ON* for EIA de-emphasized/pre-emphasized
audio.
Jumper
JU1
March, 2001
Table 6-1. Basic Repeater Controller Jumper Setting
Default
Setup Setup = Both radios turn on at power-up (repeater functional).
Knockdown = Only receive radio turns on at power up.
6864110R66-O
S2-9 should be set:
• OFF* for EIA de-emphasized/pre-emphasized
audio
• ON for flat audio.

S2-10 and S2-11

S2-10 and S211 select the desired drop-out delay (hang
time). With both switches OFF, the transmit radio
unkeys approximately 3 seconds after the receive radio
loses the COR indication (J3 pin 8 or pin 14 goes high).
The dropout delay is decreased to approximately 1.5
seconds if S2-10 is ON. The shortest dropout delay,
essentially "zero" seconds, is enabled by placing S2-11
in the ON position. For a bidirectional repeater, the "0"
seconds dropout delay (S2-11 ON and S2-10 OFF or
ON) should be used.
S2-10 should be set:
• OFF* for 3-second dropout delay
• ON for 1.5-second dropout delay
S2-11 should be set:
• OFF* for 1.5/3-second dropout delay
• ON for 0-second dropout delay.

S2-12

S2-12 allows the output of the VOX circuit to key the
transmit radio. Note that the "zero" dropout delay
should not be used with the VOX keying. A delay of 1.5
or 3 seconds should be used to "smooth" the output of
the VOX. The audio gate must be enabled by placing
S2-7 in the ON position. The VOX circuit operates only
in a unidirectional mode (i.e. from the handset audio of
the receive radio). The VOX also responds to the noise
burst, or "squelch tail," at the end of a transmission
and the dropout delay increases by that amount. Use of
coded squelch (TPL or DPL) is recommended.
S2012 should be set:
• OFF* for VOX disable
• ON for VOX enable.
Jumper Configurations
Table 6-1 lists the jumper settings for JU1 on the Basic
repeater controller.
Notes
Basic Repeater Controller

Jumper Configurations

6-3