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ACT is a "status only" MUXbus
bit. All "status only"
MUXbus
bits are
signified
in Table 1 by a double
asterisk
(**).
Aoprox.
65 usee
I
~.
Pulse Width
~
I I
:
~
:
Approx.
310 usee
~
55
----tV:
:'"
i~
I I
I
I I
i i
A 'o
X
i
At,
:
:
I I
I
I I
,~~~ ~
~i~~secI+-
:
: :
Data =:)(Dto!
!
Valid
X
Don' t : ea,.
X
Ft' : V"id ><=
iill1l-m53
I I
I
I
I
Address
BAO-BA3
tos
is Data Set Up Time:
Data must
be valid
at least
1 mi~rosecond
prio~ to
1:5S
rising edqe
tOH
IS
Data Hold Time: Data must be
valid
at least
15 microseconds
after
the rising edge of
5S.
Ato is any address and At 1 is the next address
Dt
0
is the data corresponding to At 0' etc.
AEPS-35788-0
Figure
4.
MUXbus Timing Diagram
1.3 DMP 8-CONDUCTOR
METERING
CABLE
The 8-conductor
metering cable connects the DMP ME-
TER Jack J1202 to either the station TX Metering or sta-
tion RX Metering Jack. The TX and RX Metering Jacks
(J413 and J21O, respectively)
are both located on the sta-
tion RF Tray front panel. The PAMetering
Jack (J503) is
located on the PA Distribution
Board, within the station
Power Amplifier Deck. This cable provides interface lines
which connect five metering
lines and a meter common
line to the DMP, as shown in Table 2.
1.4
VOLTAGE PROBES
The two voltage probes plug into two jacks provided on
the bottom
edge of the DMP: RED
= "+" =
J1203;
BLK
= "-"
=
J1204. Each of the probes is equipped
with a reversible blunt or pointed tip.
2. METERING FACILITIES
The DMP provides a measured
indication for the signals
listed in Table 2 on a 0-50 J.l.A full-scale
meter (MI201).
The proper indications are the same as those obtained us-
ing a Motorola Portable Test Set or TEK-5F Meter Panel,
as described in the MSF5000 Base Station and Repeater
Instruction
Manual. A specific meter position is selected
by using the METER selector switch S1208 on the face of
the DMP. When METER
selector switch S1208 is in the
"10 V" or "25 V" position, the meter monitors the volt-
age probes and is calibrated to read full-scale voltage (in-
stead of full-scale
microamperes).
IMPORTA.NT
When measuringthe.power
amplifier cir-
cuits, via J503, meter REVERSING
switch
S1209 must be placed in the "-"
(or re-
verse) position.
METER
REVERSING
switch S1209 is normally
in the"
+"
(or
forward) position when the DMP is con-
nected to either J413 or J210 (TX or RX
Metering,
respectively).
3. DIAGNOSTIC FACILITIES
3.1
GENERAL
The right hand portion of the DMP contains the switches
and displays required to monitor and manipulate
the op-
erating parameters
of the station. These functions
are
made possible by connecting
circuits of the DMP to the
MUXbus of the station EXPANSION
connector
(J800).
3.2
CHANNEL DISPLAY
The CHANNEL
display consists of two 7-segment
LED
packages that are used to display the station's current aux-
iliary operating
channel (left-most
unit) and its current
primary operating channel (right-most
unit). The primary
operating
channel is the channel currently
selected for
the station transmitter
and primary receiver. The auxilia-
ry
channel may have several uses, one of which is that it
would be the selected channel of the secondary receiver
in a 2-receiver station. The operating CHANNEL
display
changes each time the station changes operating channel,
or the operating channel is changed via the channel select
switch on the station control tray. The auxiliary CHAN-
NEL display changes only when a change of operating
channel occurs.
Table 2.
DMP Metering Cable Interface Lines
Line
DMP Meter JI202
TX Metering J413
RX Metering J210
PA Metering J503
1
Meter 1
Forward Voltage
Quadrature Detector
Final Stage 1
2
Meter 2
Not Used
I-F Level
Final Stage 2
3
Meter 3
Control Voltage
Mixer Output
Final Stage 3
4
Meter 4
Not Used
Reference Oscillator
Predriver Stage
5
Meter 5
XMTR Synthesizer Steering Line
RCVR Synthesizer Steering Line
Driver Stage
6
Not Used
GND
GND
Factory Test
7
Meter Common
GND
GND
A
+
Meter Reference
8
Not Used
GND
GND
Factory Test
4
68P81114E03
7/15/90
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