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Table l. Station Parameter Status Display Matrix
ADDRESS
D3
D2
D1
DO
0
SPXMr
SCAN
TALM
SALM
DS
DS
1
RPTPTT
LIN PTT
LOCPTT
INTCOM
2
TXPLDS
TX
RX2ACT
RXIACT
ACT··
3
RXPLDS
Rl PLDT
Rl SO LV
RIUN
SO··
4
R2MUTE
R2PLDT
R2S0LV
R2UN
SO··
5
GDTN
AUXDET
RPTKD
RPT
DT
USO··
6
ACC
EXDA
DVPSEL
DVPC/C
DIS··
DT
7
..
..
..
Baud Rate
8
TXRXC8
AUXC4
AUXC2
AUXCI
9
AUXC8
AUXC4
AUXC2
AUXCl
10
.
.
..
..
11
..
.
..
..
12
RW40VG
RW3.SYN
RW2PA
RWIBAT
13
RWC8
RWC7
RWC6
RWC5
14
FWC4
FWC3
FWC2
FWCl
15
FWC8
FWC7
FWC6
FWC5
.
currently unassigned
.•• status only bits
These same operatingparameters
may also be selectively
altered using various control switches located-on the
DMP. Also, two separate 7-segment display units indicate
(in hexadecimal notation =-$#) the current auxiliary
primary operating station channels ($1 through $F
Channell through 15, and $0 Channell).
1.2 DMP 4O-CONDUCTOR
INTERFACE
CABLE
The DMP comes with a separate 40-conductor ribbon in-
terface cable, a separate 8-conductor metering cable with
"modular" connectors, two separate voltage probes and
a set of housing rods that may be extended and inserted
into the mounting rails inside the station cabinet. Refer
to Figure 2 for the locations of the connectors used for
the CONTROL (11201), METER (11202),
+
voltage
probe (11203), and - voltage probe (11204). Refer to
Figure 3 for a view of the DMP with its front panel re-
moved.
The 40-conductor interface cable connects the station
EXPANSION connector J800 (located on the top of the
control tray housing) to the DMP CONTROL connector
J1201. This cable provides interface lines which connect
power, audio and digital signals between the station con-
trol board, other control modules within the station, and
the DMP. There are four types of signal lines provided,
as follows:
••
audio line
.,
dedicated logic line
.,
multiplexed logic (MUXbus) lines
.,
power and ground lines
2
68P81114E03
SELECT AUDIO (Pin 32) - Audio line
The Select Audio signal, originating on the station control
module, is the audio input for the local speaker amplifier
circuit in the DMP. Any of the following audio signals will
be present on the select audio line when it is properly
gated by the control circuits in the station: primary receiv-
er audio, secondary receiver audio, transmit audio from
the remote wire line, and automatic station LD. and
alarm tone audio. The Select.Andio line is connected to
the wiper of the VOLUMpcontrol
on the control tray
front panel. Therefore, the debias level and ac level on
the line vary depending onthe VOLUME control setting.
The DMP employs an audio power amplifier circuit to
provide up to 5 watts of local service audio from the Select
Audio signal, through the DMP internal 4-ohm speaker.
The audio power amplifier circuit can be disabled with
SPEAKER ON/OFF switch S121O,located on the face of
the DMP. By connecting an optional microphone
(HMN1001) to CONTROL Jack J812 on the front panel
of the station control tray, the transmitter can be locally
keyed and modulated, or intercom with the remote con-
trol.console operator can be accomplished.
EXPANSION RE5ET (Pin
12) -
Dedicated Logic line
11I
e.EXPANSION RESET signal is a shared logic line
whiCh allows a clean, coordinated start up of the station
co:fltro1 module and any other interconnected modules or
e~t~rnal equipment (such as the DMP). The EXPAN-
~QN RESET signal is active low at power-up, or when
station control module switch S801 is put into the TEST
position, or when
t~
station control module is reset by
its watchdog timer circuit, or when another control mod-
ule receives a command to reset the station. Also, normal
MUXbus operation is suspended while the watchdog tim-
er circuit generated RESET signal is active low. The
MUXbus data strobe line DS, is held inactive and the
MUXbus address and data lines do not follow their nor-
mal patterns.
IMPORTANT
While the EXPANSION RESET line is
active low, no module except the station
control module should write to the MUX-
bus data lines. Otherwise, the station con-
trol module may fail its self diagnostic
tests, and remain reset indefinitely.
Multiplexed Logic (MUXbus) lines
The multiplexed logic (MUXbus) lines consist of the fol-
lowing signals:
*
Four Address lines (BAO-BA3) - Pins 13-16
••
Four Data lines (BDO-BD3) - Pins 17-20
••
Data strobe (DS) - Pin 22
All DMP MUXbus lines are referenced to audio ground
(logic ground is not used). The four address and the four
7/15/90
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