Vertex Standard VX-5500L, Service Manual

Page: 10 / 94

1-9
Operating Manual Reprint
DSUB 25-P
IN
A
CCESSORY
C
ONNECTOR
Pin 1: RSSI
[Analog Output]
A DC voltage proportional to the strength of the
signal currently being received (Receiver Signal
Strength Indicator) is provided on this pin. This
low impedance output is generated by the receiver
IF sub-system and buffered by an internal op-
amp. Typical voltages are graphed as follows:
DSUB 25-Pin Numbering
Pin 2, 3, 4, 5 & 6: SELECT, DSUB 03, DSUB 04, DSUB
05 & DSUB 06
[Digital Input Port]
These input port features can be programmed via
the CE49 programmer. The same item can not be
chosen twice.
To select the “Input port” page, (Common
¯
DSUB-25
¯
Input port).
LOGIC level (+5V / 0V) input (Low active).
High Impedance input.
None
MON
This feature is the same as pressing and
holding in the Monitor key.
DIMMER LCD illumination dimmer “on.”
Hook Activates the Hook1 feature.
SCAN Activates the scanner.
G-SCAN Activates the Group scanner.
RPT INH Disables the repeater feature during
Multi Deck operation.
EMG Activates the Emergency feature.
Home Switches to the Home Channel.
CH SW0 Memory channel recall
(Channel Switch Table bit 0)
CH SW1 Memory channel recall
(Channel Switch Table bit 1)
CH SW2 Memory channel recall
(Channel Switch Table bit 2)
CH SW3 Memory channel recall
(Channel Switch Table bit 3)
Example
If you assign “CH SW0” and “CH SW1” to the
Universal Input Port, you can recall Channels 1~3
as shown below.
Channel CH SW0 CH SW1
1 1 0
2 0 1
3 1 1
Pin 2
Pin 4
Pin 6
Pin 3
Pin 5
DSUB2
5 o
u
tp
u
t
le
v
e
l (
V
)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
1259 398 125 398 12.5 4 1.25 0.4 0.125 0.04
SSG Input Level (uV)