Motorola ASTRO Digital Spectra, Instruction Manual

Page: 39 / 114

Installation: Remote Control Installation
6881086C22-B 17
Tone Remote Control
Installation
NOTE: The Tone Remote Control Option (L146) must be ordered for
this option to be available.
Tone remote desksets are to be connected to Accessory Connector 2 on the
rear panel of the Consolette. See Figure 2 on page 6. Two-wire or four-wire
operation is available. Two-wire operation uses Line1+ and Line1- for both
receive and transmit audio. Four-wire operation uses Line 1+ and Line1- for
receive audio and Line2+ and Line2- for transmit audio. The default setting for
wireline operation is two-wire. Impedance flexibility of 600
Ω
or 900
Ω
between
Line1+ and Line 1- is also provided. The default setting for impedance is 600
Ω
.
For information regarding changing wireline operation or impedance, refer to
Table 3 on page 10 for S100 and Table 4 on page 10 for S101. Refer to the
applicable tone remote deskset manual for information regarding deskset
operation. Table 11 indicates the Accessory Connector 2 pins used for tone
remote control operation.
TRC Adjustment
Procedure
Since the potentiometers are factory adjusted, the following information is for
reference only.
Transmit R529 is set fully clockwise, then turned counterclockwise one-half turn. This
sets the AGC gain to somewhat less than maximum. If AGC is disabled with
S100-4 set to the ON position, then R529 should be adjusted to obtain 0.7 VAC
at TP1 when a 1 kHz audio signal is sent from the console.
A 120 mVrms, 1 kHz audio signal from a 600
Ω
source is applied to the Line 2+
and Line 2
–
input pins at Accessory Connector 2. The Consolette is placed in
transmit and R569 is adjusted to obtain 3 kHz deviation.
Receive While receiving a 1 kHz, 3 kHz deviation audio signal, R545 is adjusted for
0 dBm (775 mVrms) across a 600
Ω
load at Line1+ and Line1
–
output pins at
Accessory Connector 2.
Table 11. Accessory Connector 2 Pins: Tone Remote Control Operation
Pin Number Signal Name
1 LINE1+
3 LINE2+
16 LINE1–
11 LINE2–