Norsat ATOM Ka Series, Operator'S Manual

Page: 15 / 33

ATOM Ka 25-50W BUC & SSPA Revision 1.3
039092
15 039092_r1.3 - Operator Manual ATOM Ka
25-50W.doc
Table 2-3: J2 Pinouts for ATOM Configurations
Connector
Pin
Standard
Configuration
Ethernet
Configuration
Signal Description
A RS-485 Tx- RS-485 Tx- Host computer Tx- signal (signal into unit)
B RS-485 Tx+ RS-485 Tx+ Host computer Tx+ signal (signal into unit)
C RS-485 Rx+ RS-485 Rx+ Host computer Rx+ signal (signal out of unit)
D
Mute Mute Controls Muting of Amplifier
E
Eth Rx+ Ethernet host computer Rx+ signal (signal out of unit)
RS-232 Rx RS-232 host computer Rx signal (signal out of unit)
F
Eth Tx+ Ethernet host computer Tx+ signal (signal into unit)
RS-232 Tx RS-232 host computer Tx signal (signal into of unit)
G
GND GND
Ground reference for Ethernet/RS-485/RS-232 signals. This is internally
connected to case ground.
H
Eth Rx- Ethernet host computer Rx- signal (signal out of unit)
NC NA
J RS-485 Rx- RS-485 Rx- Host computer Rx- signal (signal out of unit)
K
Eth Tx- Ethernet host computer Tx- signal (signal into unit)
NC NA
Ground Pin(s): Pin G
Ground/shield for Ethernet, RS-485, RS-232 & Mute signals. This is internally connected to the case
ground. Do not exceed 100mA.
Mute Control: Pin D
This pin controls the hardware mute state of the ATOM. When muted, the power transistors are turned
off, reducing power consumption and providing an RF output noise close to the thermal noise floor.
The operation of this pin is fully configurable through the M&C Interface. Pin D can be biased with either
an internal Pull-Down (to 0V) or an internal Pull-Up (to 4V). Pin D is also configurable to be either active
high (3-5V on Pin D will mute the unit) or active low (0-0.8V on Pin D will mute the unit). All voltages are
relative to Pin G or the Case Ground.
Because of the configurable pull-down / pull-up resistor, the unit can be configured to be active (i.e. not
muted) when Pin D is left floating. Therefore, it is possible to operate the unit with no connection pin D.
The ATOM mute control behavior is shown below in Table 2-4 . Note that the ATOM may be factory
ordered with alternate configurations so the Default configuration shown in the table is not reflective of all
ATOM units.