Integrated L-Band Up/Dn Converter
LT3600
CG-1309
Page 13
2.4.6 External 10 MHz Input (J2)
This connector is a BNC female. The male
mate (not supplied) should be compatible with
the 50-ohm coax used to connect to the system.
2.4.7 SSPB Interface (J6)
This connector is a 9-pin female miniature type
“D” connector with standard #4-40 female
screw-lock hardware mounting. The mating
shell, pins, and strain relief are not supplied.
Outputs are open collector and inputs have
internal 1K full PS to +5V. The pin-out is as
follows:
Pin 1
SSPB Band Control Output -
(Low = Lo Band)
Pin 2
Amplifier Fault - Open (Hi) = ALM
Pin 3
Thermal Alarm Input –
Open (Hi) = ALM
Pin 4
Lock Alarm Input - Open (Hi) = ALM
Pin 5
Up/Dn Converter Ground
Pin 6
SSPB Attenuator/Enable Control –
(Lo = Enable)
Pin 7
Not Used
Pin 8
SSPB Detector Input + Analog 0-5V
Pin 9
SSPB Detector Input – Analog 0-5V
2.4.8 Remote Serial I/O Interface (J7)
This connector is a 9-pin male miniature type
“D” connector with standard #4-40 female
screw-lock hardware mounting. The mating
shell, pins, and strain relief are not supplied.
The electrical interface to this connector is for
a standard RS-422/485 bus. This port may be
reconfigured for RS-232 as shown below. For
bus protocol requirements, refer to Section 3-3.
The convention used for the signals is a logic
Hi for Mark (Rest) and a logic Lo for Space.
The pin-out is as follows for RS-422/485:
Pin 1
Rx -
Pin 2
Rx +
Pin 3
Tx +
Pin 4
Tx -
Pin 5
Ground
Pin 6
Alarm Relay: Common
Pin 7
Alarm Relay: Normally Closed
Pin 8
Not Used
Pin 9
Alarm Relay: Normally Open
Port J7 may be reconfigured for RS-232 interface
by changing the following jumpers locations on the
main board inside the converter:
Serial Port
RS-422/485
RS-232
JP3
TXD SER 0
RXD SER 1
(Standard)
Jumpers On
1-2
5-6 7-8
9-10 11-12
17-18
Jumpers On
13-14
15-16
JP3
TXD SER 1
RXD SER 0
3-4 5-6 7-8
9-10 11-12
19-20
13-15
14-16
JP2 Remove
Install
The pinout for RS-232 is as follows:
Pin 1
Not Used
Pin 2
Rx +
Pin 3
Tx +
Pin 4
Not Used
Pin 5
Ground
Pin 6
Alarm Relay: Common
Pin 7
Alarm Relay: Normally Closed
Pin 8
Not Used
Pin 9
Alarm Relay: Normally Open
2.4.9 High Stability 10 MHz Reference
Output (J1) (Optional Connector)
This connector is a BNC female. BNC jumper
cable is supplied with this option for
connection to J2.
2.5 OPERATIONAL CHECK
To verify that the basic functions of the unit are
operational, it is recommended that the
following check-out procedure be followed
prior to final system integration. If there are
any questions regarding performing the
indicated operations, refer to Section 3-3.
2.5.1 Setup
Connect the unit to a primary power source and
turn on the power switch at the front of the
unit. Verify that the power led is illuminated. If
the power led is not illuminated, check the
power cord and fuse. A spare 3.15 A fuse is
provided inside the power connector.
Switch the primary power off and connect the
IF out, LB in, IF in and the LB out at the rear
of the chassis to J3, J4, J9 and J10 respectively.
Re-establish the primary source of power. The
Front display will light and status will be
displayed.
